According to the given statement is internal energy 107 J heat was added to the system.
What is internal energy in physics?The sum of the kinematic and chemical potential energies of all of the particles in the system is the internal energy. Nanoparticles accelerate and pick up kinetic energy when energy is applied to raise the temperature.
Briefing:The equation utilized is based on the first rule of thermodynamics and reads as follows:
ΔE = q + w
where w represents the work completed by or on the system. A change in internal energy is represented by ΔE, and q is the heat energy that is either contributed to or released by the system.
The system performs the task, therefore w has a negative sign.
So w = -49 J
ΔE = 58 J
q = ?
Let's plug in the values in the equation:
58 J = q - 49 J
on rearranging this:
q = 58 J + 49 J
q = 107 J.
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an astronomer on earth observes two spacecraft moving away from each other along an axis that passes through the earth. the astronomer measured the speed of each spacecraft to be 0.65c relative to earth. at what speed are the spacecrafts moving apart relative to each other
An astronomer on Earth witnesses two spacecraft traveling apart from one another along an axis and passes through the earth at a relative speed of 0.70c.
What does an astronomer do?Astronomers do research on planets, stars, and some other celestial objects. They employ both space-based technology, like the Hubble Space Telescope, and ground-based technology, such optical telescopes. Some astronomers investigate far-off galaxies and phenomena like black holes & neutron stars.
Do astronomers work for NASA?Astronomy, atmospheric science, physics, and astrobiology, the study of space biology, are some of the scientific fields that are most likely to result in employment at NASA. NASA employs 15 different categories of scientists, demonstrating the importance of scientists from all specialities in space research.
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Suppose a distant galaxy has a recessional velocity of 8254 km/s. What is its distance given that the hubble constant is 70 km/s/mpc?.
Its distance given that the hubble constant is 70 km/s/mpc , is 117.91 Mpc.
What is hubble constant ?
Finding the true value of the Hubble constant is one of the greatest challenges in modern astronomy and could revolutionize our understanding of the universe. As such, scientists at the University of Chicago and many institutions around the world are trying to determine the numbers using multiple methods.
For a celestial body (such as a star or galaxy) at a known distance from Earth, you can use the Hubble constant to predict how fast it is moving away from Earth.
However, the true value of the Hubble constant is debatable. Based on the underlying physics that scientists believe drives the evolution of the universe, the Hubble constant should be about 68 km/s/Mpc, which is what astronomers see around us. does not match observations of real stars and galaxies in the sky. A team led by UChicago astronomer Wendy Freedman made 72 landmark measurements in 2001. The most recent accurate measurements of the distance and motion of a distant exploding star show the Hubble constant to be 69.8 km/s/Mpc, whereas other reports place this figure at 74 km/ Pushing up to s/Mpc.
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For what wavelength of light will the first-order dark fringe (the first dark fringe next to a central maximum) be observed at this same point on the screen?.
The wavelength of light will the first-order dark fringe is 1.205 μm.
Calculation:-
We know that, for the 1st order dark fringe, we have
y(dark,0 )= ( 0 + 1/2)*λ*L/d
0.00484 m =( 0.5*λ*3 ) /0.00037376
= λ =( 0.00484*0.00037376)/(0.5*3)
= λ = 1205*10^-9 m
= 1.205 μm
The wavelength of light determines its color and the wavelength of sound determines its pitch. Wavelength is the gap among two wave crests and the equal for wave troughs. Frequency is the variety of oscillations that bypass through a specific point in a single 2d, measured in cycles according to 2nd. the distance among peaks is called the wavelength.
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what kind of trend or pattern is obvious in the data? is there a consistent relationship between the volume and mass measurement
Densities are commonly used to characterize and infer the composition of various sorts of mixes as well as to distinguish between pure materials.
Density is often measured in grams per cubic centimeter. For instance, water has a density of 1 grams per cubic centimeter, compared to Earth's density of 5.51 grams. The kilograms per cubic meter unit is another way to express density (in metre-kilogram-second or SI units). A substance or object's mass is a measure of how much matter there is in it. The basic SI unit of mass is the kilogram (kg), although smaller quantities can also be measured in grams (g). Density is one of an object's most important and useful physical properties.
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For all three titrations for experiment #1 list the total volume of naoh used to reach the end point and calculate the concentration of sodium hydroxide. What was the mass of benzoic acid used for each titration? what is the average value of sodium hydroxide?.
0.03M is the concentration of sodium hydroxide.
Here from calculation concentration of NaOH -
100×0.019/ 20 = .095 M
For acetic acid-
Volume acid used, V1= 25 ml
Concentration of acetic acid N1= ?
Volume of NaOH used, V2 = 8.99 ml
Concentration of NaOH used, N2= .095 M
From N1×V1= N2×V2
N1 = N2×V2 / V1
N1 = .095 × 8.99/25
N1 = 0.03M
concentration is the quantity of a material in a certain area. The ratio of the solute in a solution to the solvent or whole solution is another way to define concentration. In order to indicate concentration, mass per unit volume is typically used. The solute concentration can, however, alternatively be stated in moles or volumetric units. Concentration may be expressed as per unit mass rather than volume. Although concentration is often used to describe chemical solutions, it may be computed for any combination.
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calculate the moment of inertia for a solid sphere with radius 0.012 m and mass 0.26 kg. express your answer in si units (but don't write the units into the box).
A solid sphere with a radius of 0.012 m and a mass of 0.26 kg, then the moment of inertia of solid sphere will be equal to 0.149 × 10⁵ kg - m².
What is a moment of inertia?The moment of inertia of a rigid body—also referred to it as the mass moment of inertia, angular mass, 2nd moment of mass, or—most precisely—rotational inertia—determines the torque required for a desired angular acceleration about just a rotational axis, much like mass helps determine the force required for a desired acceleration.
From the given information in the question,
Mass, m = 0.26 kg and
Radius, R = 0.012 m.
The MOI of sphere, I = 2/5 mR²
I = 2/5 (0.26)(0.012)²
I = 0.149 × 10⁻⁵ kg-m².
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A 1 200 kg car travels along the road. Calculate its kinetic energy at: 54 km.h-¹
Answer:
Explanation:
Given:
m = 1 200 kg
V = 54 km/h = 15 m/s
___________
Wk - ?
Wk = m·V² / 2
Wk = 1200·15² / 2 = 270 000 J or Wk = 270 kJ
if the system produces 40,048 watts, what is the energy worth per day? assume electricity costs of $0.06 per kwh.
If the system produces 40,048 watts, then the energy worth per day would be 96.152 kWh, and the electricity cost per day would be $57.67.
According to the question given,
Power = 40,048 = 40.048 kW
Time = 1 day = 24 hours
Cost = $0.06 for one KWh
Energy = Power × time
Energy = 40.048 × 24 kWh
Energy = 961.152 kWh
The total cost for one day would be:
Cost = $(0.06 × 961.152)
= $57.67
So, the energy worth per day would be 96.152 kWh, and the electricity cost per day would be $57.67.
The kilowatt-hour (kWh) is a unit of energy equal to one kilowatt of power spent for one hour. The kilowatt-hour is not a standard unit in any formal system, but it is often used in electrical applications.
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An object with mass m is attached to the end of a string and is raised vertically at a constant acceleration of g 8. If it has been raised a distance l from rest, how much work has been done by the tension in the string?.
Work is depend on fore and distance.
What is work?
Work is defined as the energy that is applied to or removed from an object by applying force along a displacement. In its simplest form, it equals the product of the force's magnitude and the distance travelled for a constant force directed in the direction of motion.
Sum of forces:
∑F = ma
T − Mg = M (g/4)
T = 5/4 Mg
Work = force × distance
W = Tℓ
W = 5/4 MgℓSum of forces:
∑F = ma
T − Mg = M (g/4)
T = 5/4 Mg
Work = force × distance
W = Tℓ
W = 5/4 Mgℓv
Hence, the work has ben done by the tension in te string is 5/4 Mgℓv
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) consider a set of points, where most points are in regions of low density, but a few points are in regions of high density. if we define an anomaly as a point in a region of low density, then most points will be classified as anomalies. is this an appropriate use of the density-based definition of an anomaly or should the definition be modified in some way?
An outlier detection technique based on density Finding data items with behavior that deviates significantly from expectations is the process of outlier detection, sometimes referred to as anomaly detection.
These things are referred to as anomalies or outliers. Another helpful unsupervised machine learning approach is LOF, which instead of evaluating the full data distribution to identify outliers, does it in relation to particular neighborhoods ( Brewing et al., 2000 ). The nearest neighbor search is used by the density-based LOF technique to find the anomalous spots.
Anomaly detection methods, sometimes referred to as outlier detection, are becoming more and more common in the data mining industry nowadays.
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suppose the wavelength of the light is 470 nm . how much farther is it from the dot on the screen in the center of fringe e to the left slit than it is from the dot to the right slit?
The dot on the screen in the center of the fringe e to the left slit than it is from the dot to the right slit is 940 nm.
The wavelength of mild is defined as. It is far denoted with the aid of the Greek letter lambda (λ). consequently, the space between both one crest or trough of one wave and the next wave is known as wavelength.
A bright fringe creates constructive interference, the wavelength is always in multiple forms.
At the center fringe, the difference is (470 nm)(0) = 0
For the first maximum, the difference is (470 nm)(1) = 470 nm
For the second maximum, the difference = (470 nm)(2) = 940 nm
Thus, for nth maxima, the difference is (470 nm)(n)
From the image uploaded, C is located on the second maximum, therefore the difference is given as (470 nm)(2) = 940 nm
Therefore, the dot on the screen in the center of the fringe is 940 nm.
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which of the following is not a clue to the formation of the solar system? group of answer choices the earth has an unusually large moon the number of small rocky planets is equal to the number of large gas-rich planets the planets and moons generally orbit in the same plane there are a large number of small rocky and icy objects in different regions of the solar system
The answer that the moon of Earth is unusually large is correct.
As all other options, in one way or another, refer to factual information about our solar system, such as the fact that the number of small rocky planets is equal to the number of large gas-rich planets and that planets and moons typically orbit in the same plane.
What is a solar system ?The Sun and the planets and objects that orbit it make up the gravitationally bound system known as the Solar System. A massive interstellar molecular cloud gravitationally collapsed to make it 4.6 billion years ago. The Sun contains the great majority of the system's mass, with Jupiter holding the lion's share of the remaining mass.
What do u mean by small rocky planets?In our solar system, Earth, Mars, Mercury and Venus are terrestrial, or rocky, planets means they are made up of rock, stones and have territorial area.
So, now we can say that “the earth has an unusually large moon” is the correct option.
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How does electron pair repulsion determine the molecular shape/molecule geometry?.
The molecular shape or molecular geometry of electron pair repulsion is determined by the no of electron pair present.
What is electron?The lightest known stable subatomic particle is the electron. It has an equal negative charge to that of 1.602176634 coulombs, which is regarded as the fundamental unit of electric charge. Only 1/1,836 of a proton's mass, or 9.1093837015 1031 kg, is present in the rest mass of the electron.
As a result, compared to a proton or neutron, an electron is thought to be almost massless, and its matter is not taken into account when determining an atom's mass number.
The quantity of electron pairs in a molecule affects its form. Electron pair interactions are typically repulsive. Electron couples align themselves to reduce their attraction to one another. It is assumed that the valence, or outermost, electron shell, is spherical
Therefore, the molecular shape or molecular geometry of electron pair repulsion is determined by the no of electron pair present.
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In a materials testing laboratory, a metal wire made from a new alloy is found to break when a tensile force of 94.2N is applied perpendicular to each end. If the diameter of the wire is 1.25mm , what is the breaking stress of the alloy? P=? Pa
The breaking stress of the alloy is 74.131 MPa
Stress = force/cross sectional area
= 94.2/(3.14*(0.00125^2)/4) = 73131210 Pa = 74.131 MPa
The amount of forces that induce deformation is measured in terms of stress. Force per unit area is a common definition of stress. Tensile stress is the term used to describe a force that pulls on an object and causes it to elongate, much as how an elastic band stretches. Compressive stress is what we refer to when forces cause an object to compress. Bulk stress is the term used to describe pressure exerted on an object from all sides, such as a submarine submerged in water (or volume stress). In some circumstances, the operating forces might not be tensile or compressive but yet result in an observable deformation. Imagine, for instance, that you are tightly gripping a book with one of your hands.
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Suppose the force of gravity on the earth is
10m/s2 and on the moon is 2m/s². If the
weight of an object on the earth is 200N
What will be its weight on the moon.
If the weight of an object on the earth is 200N, its weight on the moon will be 40 N
W = m g
W = Weight
m = Mass
g = Acceleration due to gravity
In Earth,
W = 200 N
g = 10 m / s²
m = W / g
m = 200 / 10
m = 20 kg
In moon,
g = 2 m / s²
W = 20 * 2
W = 40 N
Therefore, if the weight of an object on the earth is 200N, its weight on the moon will be 40 N
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In a movie production, a stunt person must leap from a balcony of one building to a balcony 3. 0 m lower on another building. If the buildings are 2. 0 m apart, what is the minimum horizontal velocity the stunt person must have to accomplish the jump? assume no air resistance and that ay = -g = -9. 81 m/s2.
This inquiry deals with the idea of semi-projectile motion. The equations for horizontal and vertical motion can be used to solve it.
"2.6 m/s" is the bare minimum horizontal velocity needed.
We'll start by examining the stunt person's vertical motion. To determine the motion's time interval, we shall apply the second equation of motion in the vertical direction.
You are looking for Vx0 (initial velocity in the X direction) use this formula
remember there is no acceleration in x direction, only Y
X = x0 + Vx0(t) + (1/2)at^2
X= 0 + Vx0 (t) + 0
x= Vx0 (t)
Vx0 = x/t
what we are missing is Time, so u can get this by using the Y formula to find the time
Remember there is no velocity in the Y direction
Y=y0 + Vy0(t) - (1/2)gt^2
y= 0 +0 - (1/2)gt^2
(3.0 m *2) / 9.80m/s/s = t^2
0.61224 = t^2
t = 0.78 s
now plug this time back into this formula from above
Vx0 = x/t
= 2.0m / 0.78s
=2.6 m/s
Hence the minimum horizontal velocity is 2.6m/s
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A tv with a power rating of 200 w uses 0. 8 kwh of electrical energy in one day. For how many hours was the tv on during this day?.
The TV was on for 4 hours during the day.
E = 0.8 kWh
P = 200 watts
t = E/P
t = 0.8/0.2
t = 4 hours
The electric energy definition: the capability to carry out work. Electrical power comes from the appeal or repulsion of negatively and positively-charged molecules. Electrical energy is both potential and kinetic power.
Electric energy is a kind of kinetic power due to transferring electric charges . The quantity of power relies upon on the rate of the costs – the quicker they move, the greater electric energy they carry.
Power is an important a part of present day life and crucial to the U.S. economic system. people use energy for lighting fixtures, heating, cooling, and refrigeration and for working home equipment, computer systems, electronics, equipment, and public transportation structures.
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An empty truck whose mass is 2000 kg has a maximum
acceleration of 1.0 m/s2. What is its maximum acceleration
when it is carrying a 1000-kg load?
The maximum acceleration of the truck when it carries load of 1000 kg is 0.67 m/s².
How do you find acceleration with kg and force?The rate at which an object's velocity along the same straight line as the unbalanced force changes is known as its acceleration. There is no net force and hence no movement when the forces are in balance. These three concepts are related by Newton's second law, which also addresses how an imbalanced force affects an object's motion. According to this, an object's rate of change in velocity is directly proportional to the force used and moves in the direction of the applied force. The following formula encapsulates it: force (N) = mass (kg) x acceleration (m/s2).The mass of two objects and the separation between their centers affect how much gravity there is between them.Given data :
Force moving the truck = empty truck mass x max. acceleration
= 2,000 kg x 1 m/s²
= 2,000 N
The force will remain the same even with a load of 1,000 kg because that is the maximum force the truck is capable of producing.
Therefore,
2,000 N = mass with load x acceleration
2,000 N = (2,000 kg + 1,000 kg) * acceleration
2,000 N = 3,000 kg × acceleration
=> acceleration = 2,000 N / 3,000 kg
=> acceleration = 0.67 m/s²
Its maximum acceleration will be 0.67 m/s².
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what is the tallest wall that the player can clear (i.e., get the ball over) if the wall is 87.5 ~\text{m} m away horizontally?
The tallest wall that the player can clear is 26.224m.
calculation:-
Y = xtan∅ - g/ 2u²cos²∅
put x = 87.5, ∅ = 30° and u = 44.4m/s
we get y = 25.144m
So height above ground will be
25-144 + 1.08 = 26.224m.
A horizontally fired projectile means an object that is initially launched with full horizontal velocity. So if something is launched off a cliff, say straight horizontally without an initial vertical component it is a horizontally launched projectile.
The path followed by a moving object is called its trajectory. An object thrown horizontally will be accelerated downward under the influence of gravity. Gravitational acceleration is vertical only, not horizontal. A boat sailing on a river. Fired a bullet from the gun. Throw a ball or cannonball. Movement of billiard balls on the pool table.
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a person on top of a cliff throws a rock horizontal from a height of 9.33 m above the water below with an initial speed of 7.01 m/s. what is the speed of the rock the instant before it hits the water?
The speed of the rock right before it hits the water is 15.23 m/s.
The speed of the rock should follow a uniform motion. Uniform motion is an object's motion under acceleration. It should follow the rule
v' = v + a . t
v'² = v² + 2a . s
s = v . t + 1/2 . a . t²
where v' is final velocity, v is initial velocity, a is acceleration, t is time and s is displacement.
From the question above, we know that
s = 9.33 m
v = 7.01 m/s
a = g = 9.8 m/s²
By using the second equation, we can calculate the speed of the rock right before it hits the water
v'² = v² + 2a . s
v'² = 7.01² + 2 . 9.8 . 9.33
v'² = 232.0081
v' = 15.23 m/s
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Two baby buggies are moving toward a head-on collision on level ground. The first buggy has a mass of 15 kg and is moving at a speed of 3 m/s. The second buggy has a mass of 15 kg and is moving at a speed of 5 m/s. The rugged rubber bumpers that are normally attached to the buggies have fallen off so that when they collide, they stick together. How fast (magnitude) are the buggies moving right after the collision?.
The buggies moving right after the collision will move at 5m/s and 3 m/s respectively.
An elastic collision is a collision in which there is no internet loss in kinetic energy within the gadget because of the collision. each momentum and kinetic electricity are conserved portions in elastic collisions.
Calculation:-
Since both, the biggie shave the same mass then according to the elastic collision their velocity will exchange upon each other
mass 1 = 15 kg
mass 2 = 15 kg
Velocity before collision
V1 = 3m/s
V2 = 5 m/s
Velocity after collision
V1 = 5 m/s
V2 = 3 m/s
Elastic collisions arise whilst both the momentum and kinetic energy are conserved, just like how billiard balls bounce off each different and move at the same speeds as earlier. Inelastic collisions appear whilst simplest the momentum is conserved but not the kinetic power.
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If the planet jupiter underwent gravitational collapse, its rate of rotation about its axis would.
If the planet Jupiter underwent gravitational collapse, its rate of rotation about its axis would increase .
Gravitational collapse is the contraction of an astronomical object due to the influence of its own gravity, which tends to draw matter inward toward the center of gravity.
If the planet Jupiter underwent gravitational collapse, its rate of rotation about its axis would increase as the speed will increase .
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A group of students have decided that the amount of electricity used by the school should be reduced. The students want to develop a plan to solve this problem. What should the group do first?.
The first thing the student group should do is research the amount of electricity the school uses and where it comes from.
The students should then develop a plan to reduce the amount of electricity the school uses. The plan should include measures to reduce the school's reliance on electricity, such as promoting the use of solar power or wind power. The plan should also include measures to increase the efficiency of the school's electricity use, such as retrofitting the school's lighting or installing energy-efficient appliances. The students should then present their plan to the school administration and work with them to implement the plan.
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tyree is extremely good at identifying the motivations and intentions of the people he meets. according to gardner, tyree would most likely score very well on a test of intelligence.
Tyree is extremely good at identifying the motivations and intentions of the people he meets. according to Gardner, Tyree would most likely score very well on a test of interpersonal intelligence.
The ability to recognize differences and overcoming's in situations, to centre oneself in space, to reason, to make plans, to solve problems and set them aside, to think abstractly, to comprehend and produce ideas, to store information in the mind and then retrieve it later, and to learn from experiences are just a few of the many functions of intelligence.
Even in larger species like chimpanzees, intelligence-related abilities like language proficiency are clearly distinguishable from human abilities. Being born slim or intelligent is treated just as harshly as being born talented. To put it simply, intelligence is a hallmark of personal integrity.
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consider a thermocouple circuit made with copper (cu) and constantan (c) wires. the seebeck coefficients of copper and constantan are
The reading of voltmeter of a thermocouple circuit made with copper (cu) and constantan (c) wires is 8791μV.
We have Seebeck coefficients of copper and constantan, also we have temperature of source as 25°C and temperature of ice is 0°C
We also know that Seebeck coefficient is given by the negative of ratio of change in voltage to the change in temperature, or in other words
S= -ΔV/ΔT
Now, Seebeck coefficient of copper(6.5μV/K) and Seebeck coefficient of constantan as -35 μV/K
Therefore, net Seebeck coefficient of thermocouple is =6.5+(-35)= -29.5 μV/K
Now, temperature difference is 25°C as temperature of ice is 0°C
We need to convert degree in kelvin as standard calculations involves temperature in kelvin.
We use K=C+273
Therefore, temperature difference is =25+273=298K
Therefore, according to the formula, we get
Voltage= - net Seebeck coefficient × net temperature change
=>V= -(-29.5μV/K×298K)
=>V=8791μV
Hence, voltmeter reads 8791μV.
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(Complete question) is :
Consider a thermocouple circuit made with copper (Cu) and constantan (C) wires. The Seebeck coefficients of copper and constantan are: Acu=6.5 μV/K, ac=-35 μV/K. If T1 = 25°C, what's the reading of Voltmeter?
If the mass of a person on Earth is 20 kg,
what will be his mass on the Moon? (Gravity on
the Moon is six times less than the gravity on
Earth.)
Answer:
Explanation:
Mass on the Moon:
m = 20 kg
How many joules are needed to change the temperature of 100 g of water from 20 c to 40 c?.
To raise the temperature of 100g of water from 20C to 40C, 8.4k joules are required.
A joule is the amount of energy expended when a one-newton force is exerted across a one-meter distance. One joule is equal to one watt of electricity emitted or lost over the course of one second.
One joule is therefore not a lot of energy. The kilojoule (kJ), which has a value of 1,000 J per kilojoule, serves as the standard unit of energy since it is typical to measure energies in thousands of joules. The use of calories in nutrition is one such instance. A calorie is a common unit of measurement for dietary energy content.
A joule of energy transmitted to an object is equal to one newton of force. Additionally, it gauges energy.
It, therefore, has 8.4k joules.
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What is the resistance in a light bulb that has a 61 Volt battery and a current of 12 Amps?
Answer:
5.1 Ω
Explanation:
Basic Law v = ir
so v/i = r = 61/12 = 5.1 Ω
the maximum force a grocery sack can withstand and not rip is 250 n. if 20.0 kg of groceries are llifted from the floor to the table with an acceleration of 5.0 m/s^2, will the sack hold?
No, the bag does not hold in case of the maximum force a grocery sack can withstand and not rip is 250 n. if 20.0 kg of groceries are lifted from the floor to the table with an acceleration of 5.0 m/s^2.
Define newtons second law of motion?The second law of motion of Newton describes how things behave when all external forces are not equal. The second rule states that an object's acceleration depends on both its mass and the net force acting on it. The acceleration of an item is defined by the net force acting on it and is inversely related to its mass.
Given,
Fₓ = 250
m = 20kg
[tex]a_{gravity}[/tex] = 9.81 m/s2
[tex]a_{pull}[/tex] = 5 m/s2
Fₙ = m(a+g)
Fₙ = 20 kg ( 5 m/s2 + 9.81 m/s2)
Fₙ = 20 (14.81)
Fₙ = 296.2
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1) What is the difference between force and net force on an object
Answer:
Net force is the sum of all the forces.
Explanation:
Force is the push or pull that causes acceleration.
Net force is the sum of all the forces acting on an object
The outcome is a force when an external force pushes or pulls on one thing as it interacts with another object. On the other hand, there won't be any evidence of force if both objects are imprisoned in one location and there isn't any outside pressure.
For example,
When Mathew pushes an automobile, they provide force to the vehicle while dissipating energy; this is shown by the fact that Mathew pushes the car with an 8 Newton (8 N) force.
The amount of force acting on an item from both sides is known as a net force whenever several forces are present, regardless of the direction they are acting from.
The resultant force is another term for this force.
For example,
James pulls a rope from one side, while Thomas pulls a rope from the other, such that a force is exerted on the rope from both sides. This pulling force from both sides is referred to as Net force.
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