The time taken by the drum to come to rest is 2.55 seconds and the angle that it makes is 14π.
The drum rotates around the central axis with angular velocity of 11 rad/s. After that it slow down with constant rate of 4.3 rad/s².
(a) The time taken by the drum to come at rest will he given by,
W' = W + at
W is initial angular velocity,
W' is final angular velocity,
a is the rate of slowing down,
t is the time taken.
Putting values,
11 = 4.3t
t = 11/4.3
t = 2.55 seconds.
(b) The angular displacement will be given by,
2aS = W'² - W²
S is the angles made while slowing down,
Putting values,
2(4.3)S = (11)²
S = 14 rad.
So, the angle made is 14π.
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a tenn watt heater is used to monatomic ideal gas at a constant pressure of during the process teh volum of gas increases by 23
According to the First law of Thermodynamics, the fraction of heat energy required is 3/5, for monoatomic ideal gas.
What is Ideal gas?An ideal gas is one in which there are no intermolecular attraction forces and all collisions between atoms or molecules are entirely elastic. Three state variables—absolute pressure (P), volume (V), and absolute temperature—can be used to describe an ideal gas (T). Kinetic theory can be used to infer their connection.
What is Thermodynamics?Thermodynamics is the study of changes that take place in a region of the universe that we refer to as the system; the rest of the universe is referred to as the surroundings. The system may be cut off from its environment by a physical or conceptual border.
Calculations:
The percentage of the heat energy given that raises the internal energy of an ideal monoatomic gas when it is heated at constant pressure is:
By the first law of thermodynamics
Q=U+W = f/2nRT+P∫dV= f/2nRT+PV
or Q= f/2nRT+nRT(∵PV=nRT)
= 3/2nRT+nRT= 5/2nRT
∴ Fraction of heat energy supplied = U/Q=
(3/2)nRT/(5/2)nRT = 3/5.
Hence, according to the First law of Thermodynamics, the fraction of heat energy required is 3/5, for monoatomic ideal gas.
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what is the famous title of senen bacani
Senen Bacani is an entrepreneur, the CEO of La Fuerta Inc which is one of the largest exporters of bananas in Philippines.
Who is Senen Bacani?Senen Bacani was the formal sectary of Agriculture to president Corazon Aquino and during that time he visited many Philippines province and realize how poor people struggle to fend for their families and remember how his father who was a doctor received farm produce from his patient, appreciating him for medical care they received seeing the need of the of the rural people, has compelled him to work for shifts in policy and programs as the secretary and later in 1993 after working for president Aquino administration, he establish a business in agriculture to provide employment and to alleviate poverty in the rural areas Mostly in Mindanao, where he establish business venture that brought about not only employment but peace where there had been years of unemployment, crime and inter-ethnic conflict.
Senen Bacani presently head 9 different companies and presently occupies the position of Chairman for different Inc., in the Philippines.
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if the samples are 10 cm from the axis if the rotor and the ultracentrifuge spins at 6.6×104 rpm , what is the magnitude of the net force on the rotor due to the unbalanced samples?
The magnitude of the net force on the rotor due to the unbalanced samples is 64.4 N.
What is magnitude of a force?The total amount of forces exerted on an object is referred to as the magnitude of force. The strength of the force increases when all the forces are pulling in the same direction. When forces are exerted on an item from different angles, the force's strength reduces.
If the net force acting on an object is zero, then the object is not accelerating and is in a state that we refer to as equilibrium. The magnitude of the net force acting on an object is equal to the mass of the object multiplied by the acceleration of the object.
radius r = 12 cm = 12 x 10-2 m
Mass : 10 mg = 10 x 10 -6 kg
angular speed ω = 70,000 rpm = 7330.4 rad/sec
The net force is given by :
F = m ω 2r
Substitute the given values in equation
F = (10 * 10[tex](10 * 10^{-6} kg ) * (7330.4rad / s )^{2} * (12 * 10^{-2} m)[/tex]
F = 64.4 N
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a pitot tube (fig. 14-48) is used to determine the airspeed of an airplane. it consists of an outer tube with a number of small holes b (four are shown) that allow air into the tube; that tube is connected to one arm of a u-tube. the other arm of the u-tube is connected to hole a at the front end of the device, which points in the direction the plane is headed. at a the air becomes stagnant so that va = 0, At B, however, the speed of the air presumably equals the airspeed B of the plane. Use Bernoulli's equation to derive a formula giving the air speed in terms of the difference h in the liquid levels in that tube, the density rho of the liquid in the U-tube, and the density of air Pair. Suppose that the tube contains alcohol and the level difference h is 34.0 cm. What is the plane's speed relative to the air? The density of the air is 1.14 kg/m3 and that of alcohol is 810 kg/m3. Air Hole A Liquid Number Units
Air speed in terms of the difference in the liquid levels in that tube is 68.85 m/s.
The density rho of the liquid in the U-tube is 810 kg/m³.
The density of air is 1.14 kg/m³.
What is Bernoulli's equation?
The conservation of energy concept as it applies to flowing fluids is stated by the Bernoulli equation. The reduction of fluid pressure in locations where the flow velocity is increased is the qualitative characteristic that is typically referred to as the "Bernoulli effect." Although this reduction of pressure in a flow route restriction may appear contradictory, it becomes less so if you think of pressure as energy density. Kinetic energy must rise at the expense of pressure energy in the high-velocity flow through the restriction.
We know.
Bernoulli's equation = P1 + hρg + [tex]\frac{1}{2}[/tex]ρ(a) v1² = P2 + hρg + [tex]\frac{1}{2}[/tex]ρv2²
Now, P is same : v2 will be 0.
[tex]\frac{1}{2}[/tex]ρ(a)v1² = hρg
v1 = [tex]\sqrt{(2hrhog)/rho(a)}[/tex]
Given,
h = 34cm = 0.34 m
rho, ρ = 810 kg/m³
ρ (a) = 1.14 kg/m³
v1 = v = [tex]\sqrt{2 X 0.34 X 810 X 9.81/1.14}[/tex] = 68.85 m/s
Hence, v = 68.85 m/s
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when light strikes a window pane some rays will be reflected back and forth in between the two glass surfaces. why do these reflected rays not produce visible colored interference fringes?
Yes, and the colors you see will now be the colors your eye perceives when you see the wavelengths producing the interference patterns.
In physics, the wavelengths is the length over which a periodic wave repeats or its spatial period. It is the separation between neighboring wave points that correspond to the same phase, such as two adjacent crests, troughs, or zero crossings. It is a property of both traveling waves and standing waves as well as other spatial wave patterns. The spatial frequency is the wavelength's reciprocal. The Greek letter lambda (), which represents wavelength, is frequently used. When describing modulated waves, their sinusoidal envelopes, or waves created by the interference of several sinusoids, the term wavelength is also occasionally used.
Wavelength is inversely related to frequency for a sinusoidal wave flowing at a constant speed.
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The reflected rays of light do not produce visible colored interference fringes in a window because the glass structure of a window pane prevent.
In the case of the window pane, it is true that the light is still reflected on the front and rear surface of the glass. the reflecting medium need to have a thickness that the that is comparable to the wavelength of light. windows are simply too thick. Due to the structure of glass, No Interference. In the case of thin film both reflected rays belong to the same waveform. light striking a film is partially reflected and partially refracted at the top surface. the refracted ray is partially reflected at the bottom.
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When force is applied for some distance What is that called?; When a force acting on an object moves it across a distance is called?; What is the transfer of energy that occurs when a force makes an object move?; What is the transfer of energy accomplished by a force moving a mass some distance against resistance?
When force is applied for some distance, it is called work done, and When force acting on an object moves it across a distance is called work done.
When moving an object over a distance, an external force must direct at least a portion of its force in the direction of the displacement. This is referred to as work done in physics. If the force acting along the path is constant, work can be calculated by multiplying the length of the path by the force's component. The work W is mathematically defined as the product of the force f and the distance h, or W = mgh. The work is W = mas if the force is applied at an angle to the displacement.
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Why is the weight of earth is 1 by 6 of the weight of moon?; How do you calculate your weight on the moon and earth?; What is the mass of a 6 kg object when it is brought to the moon that has a gravity that is 1/8 of that on earth?; What is the weight of a 30 kg object on earth?
Answer:
Below
Explanation:
weight = mass * g <==g is less on the moon, so your weight is less on the moon
to calculate weight, you have to use the g of the planet you are on
The MASS does not change....it will be 6kg on the moon or earth
Weight of 30 kg on earth = 30 * g = 30 * 9.81 = 294 N
Kinematics - A airplane starts from rest and must reach 20 m/s to take off. If the plane can accelerate at 1.2 m/s^2, find the minimum length of the runway. Pick the closest answer. A) 320 m B) 240 m C) 167 m D) 8.3 m
The minimum length of the runway is closer to 167 m. Hence, option (C) is correct.
What is acceleration?Acceleration is the rate at which a velocity changes over time. It qualifies as a vector quantity because it possesses both direction and magnitude. Meter/second^2 (m/s^2) is the SI unit of acceleration.
Given that acceleration of the plane: a = 1.2 m/s^2.
Final speed of the plane from rest: v = 20 m/s.
Hence, required minimum length of the runway = v²/2a
= 20²/(2×1.2) m
= 166.67 meter.
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4. The bar has a mass of 10 kg and is subjected to a couple moment of M=50 N·m and a force of P=80 N, which is always applied perpendicular to the end of the bar. The stiffness of spring is k=30 N/m and its free length is 0.5 m. The spring remains in the vertical position due to the roller guide at B. Determine the total work done by all the force acting on the bar when it has rotated downward from (=0( to 90 (. (15 points)
The total work done by all the force acting on the bar when it has rotated downward from 0 to 90° is 4500 N·m.
Solving for total work done:The total work done by all the forces acting on the bar can be calculated using the equation for work done by a torque and a spring force.
m = 10 kg
M= 50 N·m
P=80 N
k=30 N/m
x₀ = 0.5 m
θ = 90°
The work done by the torque is given by:
work_torque = M * θ
where,
M= the couple moment
θ = theta is the angle of rotation (90 degrees).
The work done by the spring force is given by:
work_spring = 1/2 * k * (x² - x₀²)
where,
k = the spring constant
x = the displacement of the spring
x₀ = the free length of the spring.
Since the spring is in a vertical position due to the roller guide at B, it will not displace and x=x₀=0.5m, and no work done by spring force.
Therefore, the total work done by all the forces acting on the bar is:
work_total = work_torque
M * θ = 50 N·m * 90 degrees
= 4500 N·m
Hence, the total work done by all the force acting on the bar is 4500 N·m when it has rotated downward from 0 to 90°.
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A rotating wheel accelerates at a constant rate from an angular speed of 24 rad/s to 36 rad/s in a time interval of 3 s. What is the angle in radians through which the wheel rotates?
The angle in radians through which the wheel rotates is [tex]14207.511^{\circ}[/tex].
What is angular velocity?
In physics, angular velocity or rotational velocity, also known as angular frequency vector, is a pseudovector representation of how fast the angular position or orientation of an object changes with time.
Given
initial angular velocity [tex]$\omega_1=25 \mathrm{rad} / \mathrm{s}$[/tex]
Final Angular velocity [tex]$\omega_2=36 \mathrm{rad} / \mathrm{s}$[/tex]
time interval [tex]$t=3 \mathrm{~s}$[/tex]
using
[tex]$$\begin{aligned}& \omega_2=\omega_1+\alpha t \\& 36=25+2 \\& \alpha=1.5 \mathrm{rad} / \mathrm{s}^2\end{aligned}$$[/tex]
(b)Average angular speed [tex]$\frac{\Delta \theta}{\Delta t}$[/tex]
[tex]$$\begin{aligned}& \theta=\omega_1 t+\frac{1}{2} \alpha t^2 \\& \theta=25 \times 8+\frac{1}{2} \times 1.5 \times 8^2 \\& \theta=200+48=248 \mathrm{rad}\end{aligned}$$[/tex]
average angular speed [tex]$=\frac{\Delta \theta}{\Delta t}$[/tex]
[tex]=\frac{248}{8}=31 \mathrm{rad} / \mathrm{s}$$[/tex]
(c)Angle rotated =248 radians
(d)angles in degree [tex]$=14207.511^{\circ}$[/tex]
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4. Two equal weights of 20 N are attached to the ends of a thin string which passes over three smooth pegs in a wall arranged in the form of an equilateral triangle with one side horizontal. Find the tension on each peg.
Answer:
Tension in topmost peg = 40rt(5/3)
Tension in other pegs = 40/rt(3)
Explanation:
Note point: I am taking T as a vector quantity and not scalar.
If the tension in the horizontal pegs is T, then the tension in the topmost peg will be T + T.
Lets find the magnitude of the vector T
|T| = 20/cos 30 can be easily seen by drawing FBD
= 40/rt(3)
Then, tension in topmost peg = rt{1600/3 + 1600/3 + (3200/3)*1/2}
= rt{(3200/3)*(5/2)} = rt(8000/3)
(a) Suppose a blood vessel’s radius is decreased to 89 % of its original value by plaque deposits and the body compensates by increasing the pressure difference along the vessel to keep the flow rate constant. By what factor must the pressure difference increase? (b) If turbulence is created by the obstruction, what additional effect would it have on the flow rate?
a). The pressure along the vessel in order to keep the flow rate at constant is 89 pascal.
b). Turbulence try to decreases flow rate, so that the pressure must need to increase after more to compensate at 89%.
The primary unit of stress is the pascal, described because the stress exerted through a pressure of 1 newton perpendicularly upon a place of 1 rectangular metre. In North America, however, the United States Customary System is preferred.
This is primarily based totally on Imperial devices which includes the pound (lb) and inch (in) or foot (ft). First, the resistance of float is inversely associated with the radius of the pipe. In different words, because the radius increases, there's extra room for the fluid to float through, and consequently the float charge increases.
a). Let x be the radius
then [tex]r_{2}[/tex] = x-89
pressure is inversely proportional to radius so, since pressure is constant there will be no change.
[tex]\frac{p_{2} }{p_{1} } =\frac{r_{1 }}{r_{2} } }\\\\\frac{p_{1} }{p_{1} } = \frac{x }{x-89+p } }\\\\\\1 = \frac{x }{x-89 } }\\\\x-89+P=x\\p=89[/tex]
So, pressure =89 pascal
b). Turbulence try to decreases flow rate, so that the pressure must need to increase after more to compensate at 89%.
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Describe the words the motion of the object from 0- 6.0s
The motion of the object from 0 to 6 seconds is a linear motion; the displacement of the object is zero between 0 to 2 seconds, afterwards between 2 to 6 seconds, the displacement of the object increased with increase in time of motion.
What is the motion of an object?
The motion of an object is described as the change in the position of an object with time.
The motion of an object can occur at;
constant velocityconstant accelerationuniform velocityincreasing velocityDuring the motion of an object at a constant velocity, the acceleration of the object for the time period is zero.
If the motion of the object occurs at uniform velocity, the acceleration of the object will be constant.
In the given graph, we can conclude the following based on the object's motion;
between 0 to 2 seconds : the displacement of the object is zerobetween 2 to 6 seconds: the displacement of the object increased with increase in time of motion.Learn more about motion of an object here: https://brainly.com/question/28180340
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In which graph is acceleration the slope?
A. Distance versus time
B. Acceleration versus time
C. Velocity versus time
D. Position Versus time
The graph of the slope's acceleration depicts velocity vs time.
reveals the solution.
The distance an object has travelled over time is displayed on a distance-time graph.
A straight-line graph of the time versus distance results is shown. The Y-axis displays the distance. The X-axis displays a time plot. Velocity changes occur more quickly on the graph with the sharpest slope.
It picks up speed the fastest. The acceleration of an item is shown by the slope of a velocity graph. As a result, the value of the slope at a particular time determines the item's acceleration at that specific instant.
A moving item is shown by a sloped line on a distance-time graph. The object's speed is equal to the gradient or slope of the line on a distance-time graph.
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1. a visible half-circle first-quarter moon 2. darkest phase of the moon full moon 3. when the the earth is between the sun and the moon 29 1/2 days 4. this is a measurement of how far the moon advances each day in orbit 13 degrees 5. the time the earth must rotate to return to same position relative to the moon new moon
First-quarter moon, New moon, Full moon, 13 degrees, 29 1/2 days. A moon can be defined as the natural satellite of planet earth.
An astronomical body that orbits a planet, dwarf planet, or minor body of the Solar System is referred to as a natural satellite most commonly (or sometimes another natural satellite). The term "moon" is a slang term that originated with the name of the Earth's moon for natural satellites.
There are 207 natural satellites that are known to exist in the Solar System's six planetary satellite systems. Orcus, Pluto, Haumea, Quaoar, Makemake, Gonggong, and Eris are seven objects that are frequently referred to as dwarf planets by astronomers and are also known to have natural satellites. As of November 2021, there are 442 more minor planets that are known to have natural satellites.
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I have multiple voltage sources of different rating like 5V,6V,1V and 20V draw schematic diagram using these sources to power a light of rating 11 volt
Answer:
add molecules
Which of the following statement is true of ATP? A. ATP stands for adenosine triphosphate
B. ATP consists of one adenosine atom and three phosphate atoms
C. ATP consists of one adPOenosine atom and two phosphate atoms
D. The breakdown of ATP provides the energy needed to fuel muscle contraction
The one that is accurate is that when the phosphate is broken down into ADP, ATP releases energy.
Does ATP save its energy in glucose form?The energy that cells need is produced through the breakdown of glucose. More energy cannot be stored by ATP molecules than is released by the cells. In actuality, ATP doesn't retain as much energy as a glucose molecule. See the equation in the question; roughly 38 ATP molecules are produced for every glucose molecule.
How does ATP store energy?The cell stores extra energy by reattaching a free phosphate molecule to ADP, converting it back into ATP. This extra energy can come from the breakdown of food that has been ingested or, in the case of plants, energy produced during photosynthesis.
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Figure shows (Figure 1) a low-pass filter; the output voltage is taken across the capacitor in an L-R-C series circuit Part A Derive an expression for Vout/Vs, the ratio of the output and source voltage amplitudes, as a function of the angular frequency w of the source OV = wc R+W L- e a dew.L everyone 0 o Vot wc/r-wc-a wC /Re-(w 'wc/r+(w It is 1 Vout = Submit Request Answer Figure < 1 of 1 Part B Find an expression for Vout/V, when w is large. 0 1 0 ) (LC HE V O (LC) 0000 O (LC) w2
The output voltage is measured across the capacitor in an L-R-C series circuit, and the expression for Vout/vs for a low-pass filter is 1/(1-w^2lc + (wcR)^2. depending on the angular frequency.
A linear shunt regulator's output voltage (LSR) is defined as the difference between the input voltage and the sum of the current flowing through the shunt resistance, and it is denoted by Vo = Vi- (io+Ish)*Rsh or output voltage = input voltage- (output current + shunt field current)*shunt field resistance. The angular frequency, also known as the angular frequency vector, is the size of the vector quantity called angular velocity. The rotational speed of an object is measured by its angular frequency. It is helpful in many scientific and mathematical fields since it makes it possible to comprehend a wide range of physical world objects' qualities.
Vout = Vs/(R+jwl+1/jwc)
Vout/vs = 1/(1-w^2lc + (wcR)^2
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1. What is a virtual image? List a property that is associated with virtual images. 2. What is the difference between a concave and convex lens (assume both sides are convex or both sides are concave)? Sketch a concave lens and a convex lens below (label both). 3. Repeat the previous question, but with mirrors instead of lenses. 4. You can use a large magnifying glass on a sunny day to ignite a piece of paper. Will the same trick work with a curved mirror? Would the mirror need to be convex or concave? Where would you need t put the paper? Note: Don't actually try this, since you could easily burn or blind yourself!
1. A virtual image is a made-up picture. A light beam that is diverging causes it to happen.
2. Convex lenses are converging lenses, whereas concave lenses are diverging lenses. When parallel rays enter a convex lens, the beams converge to a single point (the focal point), but in the case of a concave lens, the beams diverge.
3. Parallel rays converge to a point at a concave mirror and divert to a convex mirror when they reach it. Convex lenses are analogous to concave mirrors.
4. A concave mirror can indeed be utilized to ignite.
What are concave and convex mirror?
When a hollow sphere's inside surface serves as the reflecting surface and the cut part's outside is painted, the result is a mirror. A concave mirror is the name for this kind of mirror.
If the hollow sphere's cut-out portion is painted from the inside out, then its outside becomes the reflective surface. A convex mirror is the name given to this type of mirror.
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Use Eq. (9.20) to calculate the moment of inertia of a uniform, solid disk with mass M and radius R for an axis per- pendicular to the plane of the disk and passing through its center
Circular disc's moment of inertia around axis passing through mass and parallel to disc Icm=MR22
Explain about the moment of inertia?The phrase "moment of inertia" in physics refers to the precise calculation of a body's inertia with respect to rotation, or the resistance a body exhibits when a torque is applied to alter its rate of rotation around an axis (turning force).
It is a broad (additive) property: the moment of inertia for a point mass is equal to the mass squared by the perpendicular distance from the axis of rotation. Because it resists rotational motion, the moment of inertia is referred to as such and not as a moment of force.
Moment of inertia is the propensity of an object to continue rotating at a constant speed or in a condition of rest. More torque is needed to shift this state the higher the moment of inertia.
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based on what we have discussed, which one of the following waves will lose amplitude as it propagates?
The sound is perceived as louder if the amplitude increases, and softer if the amplitude decreases.
What is amplitude?
A periodic variable's amplitude is a gauge of its change over a single period. A non-periodic signal's magnitude in relation to a standard value is its amplitude. There are several definitions of amplitude, which are all functions of the size of the disparities between the variable's extreme values.
The change in pressure that a sound wave causes when it is measured at a particular location is related to the amplitude of the wave. If the amplitude rises, the sound is heard as louder; if it falls, the sound is regarded as quieter.
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Based on everything you have learned about the formation of our solar system, which of the following statements is probably not true?
Other solar systems will also have planets in the two basic categories of terrestrial and jovian.
Only a tiny percentage of stars are surrounded by spinning disks of gas during their formation.
Other planetary systems will have far more numerous asteroids and comets than actual planets.
Planets always tend to orbit their star in the same direction and approximately the same plane.
The second statement is not true.
what is solar system?
We live on a planet that is part of the Milky Way galaxy's outer spiral arm.
Our solar system is made up of the Sun, our star, and everything gravitationally bound to it, such as the moons, planets, and dwarf planets such as Pluto, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
The way the solar system formed is what determines the positioning of the planets and other celestial objects in our solar system. The solar system's early years saw only stony material capable of withstanding the heat closest to the Sun. Since terrestrial planets, the first four planets in the solar system are also known as these. All of them have stony, sturdy, and tiny exteriors.
Because of how our solar system developed, the planets and other celestial bodies are in a specific sequence and configuration. Only rocky material could tolerate the heat when the solar system was young because it was closest to the Sun. They are all small and have stony, solid surfaces.
A very small fraction of newly formed stars is encircled by gas spinning discs. This statement is not true.
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Free-body diagrams are diagrams used to show the relative magnitude and direction of all forces acting upon an object in a given situation. A free-body diagram is a special example of the vector diagrams that were discussed in an earlier unit. These diagrams will be used throughout our study of physics. The size of the arrow in a free-body diagram reflects the magnitude of the force. The direction of the arrow shows the direction that the force is acting. Each force arrow in the diagram is labeled to indicate the exact type of force. It is generally customary in a free-body diagram to represent the object by a box and to draw the force arrow from the center of the box outward in the direction that the force is acting. An example of a free-body diagram is shown at the right The free-body diagram above depicts four forces acting upon the object. Objects do not necessarily always have four forces acting upon them. There will be cases in which the number of forces depicted by a free-body diagram will be one, two, or three. There is no hard and fast rule about the number of forces that must be drawn in a free-body diagram. The only rule for drawing free-body diagrams is to depict all the forces that exist for that object in the given situation. Thus, to construct free-body diagrams, it is extremely important to know the various types of forces. If given a description of a physical situation, begin by using your understanding of the force types to identify which forces are present. Then determine the direction in which each force is acting. Finally, draw a box and add arrows for each existing force in the appropriate direction; label each force arrow according to its type. If necessary, refer to the list of forces and their description in order to understand the various force types and their appropriate symbols.
A visual, dematerialized, symbolic depiction of the body (a structure, element, or fragment of an element) in which all connecting "parts" have been eliminated is known as a free-body diagram.
A diagram that changes when the issue is resolved is called a free-body diagram. A free body diagram often includes the following elements:A condensed form of the body (most commonly a box).A coordinate framework.Arrows showing in the direction in which forces operate on the body are used to depict forces.Moments appeared as curved arrows pointing towards the body's acting direction.The specific problem and the presumptions used will determine how many forces are operating on a body. Friction and air resistance are frequently ignored.
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The absorption spectrum for chlorophylls a and b are shown by the graph. These are two pigments found in plants and green algae that are the main pigments of photosynthesis.
At which wavelength of light would photosynthesis be at its lowest?The absorption spectrum for chlorophylls a and b are shown by the graph. These are two pigments found in plants and green algae that are the main pigments of photosynthesis.
At which wavelength of light would photosynthesis be at its lowest?
A.) 450 nm
B.) 550 nm
C.) 650 nm
D.) 400 nm
The wavelength of light would photosynthesis be at its lowest at 650nm.
The correct option is C.
What is wavelength?The wavelength is the spatial period of a periodic wave which is the distance over which the wave's shape repeats.
Since the absorption spectrum for chlorophylls a and b are shown by the graph which indicates that there are two pigments found in plants and green algae that are the main pigments of photosynthesis.
At point 650nm, the wavelength of light would photosynthesis be at its lowest because red has longest wavelength, at around 620 - 780 nanometers with lowest frequency.
In conclusion, the wavelength of light is defined as “the distance between the two successive crests or troughs of the light wave” and is denoted by the Greek letter lambda.
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an atomic spectrum contains a line with a wavelength centered at 402 nm . careful measurements show the line is really spread out between 401 and 403 nm . estimate the lifetime of the excited state that produced this line.
The lifetime of the excited state that produced this line is 416.66sec if a wavelength ranges from 401nm and 403nm.
For solving this problem we use Rydberg equation whose formula is given by
v=[(1 / λ₁) -1 / λ₂)]×(h×c)
where v is the frequency of the photon,
λ is the wavelength of the photon
h is plank's constant
and c is the speed of light in vacuum
Since we are given λ₁ ,λ₂ as 401nm and 403nm respectively.Also we know that value of h is 6.6ˣ10⁻³⁴(J-sec)/m and c=3ˣ10⁸m/sec
So,putting all values on above formula,we get
=>v=[(1/401)-(1/403)]ˣ(6.6ˣ10⁻³⁴) ˣ (3ˣ10⁸)
=>v=[(403-401) ˣ (6.6ˣ10⁻³⁴) ˣ (3ˣ10⁸)] / (401 ˣ 403)ˣ(1/10⁻²⁷)
=>v= [[2 ˣ (6.6ˣ10⁻³⁴) ˣ (3ˣ10⁸)] ₓ(1/10⁻²⁷)] ˣ (1 / 401 ˣ 403)
=>v=(39.6 ˣ 10) / 161603
=>v = 396/161603
=>v = 0.0024/sec
We know time period is reverse of frequency, so lifetime span is
=>t=1/v
=>t=1/ (0.0024/sec)
=>t=416.66sec
Hence, lifetime of the excited state is 416.66sec.
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Consider the following statement: The magnitude of the buoyant force is equal to the weight of fluid displaced by the object. Under what circumstances is this statement true? a. for every object submerged partially or completely in a fluid b. only for an object that floats c. only for an object that sinks d. for no object submerged in a fluid
The amount of fluid the object displaces equals the buoyant force's magnitude.This really is true for any object that is partially or entirely submerged in a fluid.
Whatever happens to the an object when its weight and buoyant force are the same?The object can stay suspended at its current depth if the hydrostatic pressure is equal to its weight.Regardless of whether an object floats, falls, or is held in a liquid, the hydrostatic pressure is constantly at work.
How much of a force does buoyancy exert on an item submerged in fluid?The mass of the fluid that an object displaces determines the size of the buoyancy force acting on it.
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What are the units used to measure mass and weight?; Are mass and weight measured in the same units?; What unit is mass measured in kilograms pounds Newton's?
Kilogram are the units used to measure mass and weight. The same units are used to measure mass and weight. A body's mass can be thought of as a measurement of its amount of matter.
And the SI unit of mass is Kilogram (kg). Weight is a measurement of how much gravity is pulling on a body. Weight is calculated using the method w = mg. Each item in physics has a unit that establishes its common measurement. Consequently, a physical quantity like mass has a unit as well. In International systems, SI, the mass is measured in Kilograms symbolised by symbol kg. Weight in this context is a vector quantity denoted by N and measured in Newton.
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Refer to the following circuit. We have RG1 = 600 k2, RG2 = 300 k, Rp = 2.2 k2, RS = 1.2 k2, Vt = 0.4 V, kn = 1 mA/V, and Vpp = 9V. VDD 3R (a) If RG2 is short, find Vp and Vs. (10 points) (b) If Rs is short, find Vp and Vs. (10 points) (c) If Rp is short, find Vs. (10 points) (d) If RG1 and Rp are both short, find Vs. (10 points) (e) If RG1 and Rs are both short, find VD. (10 points) (f) If RG2 is open, and Rp is short, find Vp. (10 points)
(a) If [tex]R_{G_{2} }[/tex] is short,
[tex]V_{S} =0.52V[/tex]
[tex]V_{P} =8.04V[/tex]
(b) If [tex]R_{S}[/tex] is short,
[tex]V_{S} =0V[/tex]
[tex]V_{P}=1.564V[/tex]
(c) If [tex]R_{P}[/tex] is short,
[tex]V_{S} =1.764V[/tex]
(d) If [tex]R_{G_{1} }[/tex] and [tex]R_{P}[/tex] are both short,
[tex]V_{S} =5.55V[/tex]
Given,
[tex]R_{G_{1} } =600K[/tex] [tex]R_{G_{2} } =300K[/tex]
[tex]R_{D} =2.2K[/tex] [tex]R_{S} =1.2K[/tex]
[tex]V_{t} =0.4V[/tex]
(a) If [tex]R_{G_{2} }[/tex] is short,
[tex]V_{G} =0V[/tex]
[tex]V_{GS} = V_{G} -V_{S}[/tex]
[tex]V_{GS} =0-I_{P}R_{S}[/tex]
[tex]V_{P}=9-I_{P}R_{D } = 9-(0.43*10^{-3} )(2.2K)[/tex]
[tex]V_{P}=8.04V[/tex]
And,
[tex]V_{S} = I_{P} R_{S}=(0.43*10^{-3} )(1.2K)[/tex]
[tex]V_{S} ==0.52V[/tex]
Hence,
[tex]V_{S} =0.52V[/tex]
[tex]V_{P} =8.04V[/tex]
(b) If [tex]R_{S}[/tex] is short,
[tex]V_{G} =\frac{300K}{300K+600K} (9)[/tex]
[tex]V_{G} =3V[/tex]
∵ [tex]V_{S} =0V[/tex]
∴ [tex]V_{G{S} } =3V[/tex]
[tex]I_{P} =\frac{K}{2} [3.04]^2=\frac{6.76}{2} mA=3.38mA[/tex]
[tex]V_{P} =9-({3.38mA} )(2.2K)=1.564V[/tex]
Hence,
[tex]V_{S} =0V[/tex]
[tex]V_{P}=1.564V[/tex]
(c) If [tex]R_{P}[/tex] is short,
[tex]V_{P} =9V[/tex]
[tex]V_{S} =I_{P} R_{S }[/tex]
[tex]V_{G}=3V[/tex]
[tex]I_{P} =\frac{1mA}{2} [(3-(1.2K)I_{P} )-0.4]^{2}[/tex]
[tex]I_{P}=1.47mA[/tex]
∴ [tex]V_{S} =I_{P}(1.2K)[/tex]
[tex]V_{S} =1.764V[/tex]
Hence,
[tex]V_{S} =1.764V[/tex]
(d) If [tex]R_{G_{1} }[/tex] and [tex]R_{P}[/tex] are both short,
[tex]V_{G}=9V[/tex]
[tex]V_{S} =I_{P}R_{S}[/tex]
[tex]I_{P} =\frac{1mA}{2} [(9-(1.2K)I_{P} )-0.4]^{2}[/tex]
[tex]I_{P} =4.63mA[/tex]
∴ [tex]V_{S} =I_{P}R_{S}=(4.63mA)(1.2K)[/tex]
[tex]V_{S} =5.55V[/tex]
Hence,
[tex]V_{S} =5.55V[/tex]
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If m1 is 50 kg and has a velocity of 4 m/s, and m2 is 75 kg and has a velocity of -1 m/s, then what would be the final velocity of object 2 if the two objects collide and bounce off of each other and object 1 has a final velocity of -2 m/s?
The final velocity of object 2 is: 3 m/sec
What is the conservation of mass?According to the rule of conservation of mass, no atoms are created or destroyed during a chemical process. Instead, the atoms combine in a variety of ways to create goods. This explains why each element has the equal amount of atoms on both sides of an equation with balanced symbols.
According to conservation of mass,
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂
Given that,
m₁ = 50 kg
m₂ = 75 kg
u₁ = 4 m/s
u₂ = -1 m/s
v₁ = -2 m/s
v₂ = ?
Now, putting the values,
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂
(50 × 4) + [75 × (-1)] = [50 × (-2)] + (75 × v₂)
or, 125 = -100 + 75 v₂
or, 75 v₂ = 225
or, v₂ = 3 m/sec.
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A student decided to find the density of her house key to try and identify the type of metal from which it is made. She found the volume of the key to be 5 mL and the mass to be 39.5 g.
The density of her house key is 7.9 g/ml, So the metal is Bronze - lead.
Density is the substance's mass consistent with the unit of quantity. The symbol most customarily used for density is ρ, despite the fact that the Latin letter D can also be used. Density is the size of ways tightly a cloth is packed together. it's far defined as the mass consistent with unit quantity.
ρ = m/V, wherein ρ is the density, m is the mass of the item and V is the quantity of the object.
The density of a liquid is a measure of how heavy it is for the quantity measured. in case you weigh the same amounts or volumes of two one-of-a-kind beverages, the liquid that weighs extra is greater dense.
Calculation:-
Density = mass/volume
= 39.5 / 5
= 7.9 g/ml
The density is of two types, one is absolute density, and the alternative is relative density. Relative density is also called unique gravity, which is the ratio of the density of a material to the density of a reference material. typically, the reference fabric is water.
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