Answer:
yes it's communication
6. A student starts at the origin and walks 6 meters away taking a time of 3 seconds to do so. The student then stands still for 2 seconds, and walks back towards the origin a distance of 3 meters in the next 5 in seconds. The student stops for a 1 second break and then walks 7 meters back towards the origin and ends up passing the start point. What distance did this student travel? What was their displacement?
Answer: 16 meters; -4 meters
Explanation:
For this question, you can ignore the times that were given to you.
a.) Let's start with distance. Distance is a total sum, regardless of direction. This student walked 6 meters, stands still (0 meters), 3 meters, and 7 meters. Sum up these values: 6+0+3+7 = 16 meters
b.) Displacement adds direction. The student walks 6 meters away. We will give this the +x-direction. They then walk 3 meters back towards the origin (-x-direction) and pause for a second. They continue to walk 7 more meters toward the origin (-x-direction). This time when we sum these values we must include the signs: 6+(-3)+(-7) = -4 meters. We can test this by referring to the sentence where it says they passed their starting point. This means they are now in the -x-direction and we have a negative displacement.
Hope this helps!
(b) Fig. 2.1 shows a plane boundary between air and glass. A ray of light, passing from glass to air, is incident on the boundary at O. The angle of incidence is i.
(i) The critical angle for a ray passing from glass to air is 40.5°. Calculate the refractive index of the glass.
The refractive index, n of glass is 1.53.
What is the critical angle and refractive index of a refracting medium?The critical angle of a refracting medium such as glass is the angle at no refracted ray is obtained for light passing through the medium between the boundary or interface of the medium and a less dense medium, rather an emergent ray which is per perpendicular to the normal is obtained.
Beyond the critical angle, total internal reflection occurs.
The refractive index of a medium is the ration of the velocity of light in the less dense medium to that in a denser medium.
Refractive index = velocity of light in less dense medium/velocity of light in less dense mediumGiven that the critical angle of a medium is C;
Refractive index, n of the medium = 1/ sin C
The critical angle from glass to air is 40.5°
The refractive index of glass = 1/sin 40.5°
Refractive index, n of glass = 1.53
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What is the difference between the solar system, the galaxy, and the universe? (select all that apply.)
The difference between the solar system, the galaxy, and the universe is as follows:
A solar system consists of a star and objects that are affected by its gravity revolve around it. The objects that revolve around the star are planets, moons, asteroids, and comets. Take an example of our solar system, the Sun is the star, and all the planets including Earth and moons are revolving around it.
A Galaxy consists of billions of stars and Solar systems. Despite billions of stars, most of a galaxy is empty. This tells a lot about the size of a galaxy. The galaxy that we are in is known as Milky Way.
The universe is all matter and space that there is. It consists of all the galaxies, the solar systems, and everything known to mankind.
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Consider an incandescent lightbulb. If you wanted to turn a 10-w lightbulb into a 100-w lightbulb, how would you change the temperature of the filament inside the bulb?.
By using the blackbody radiation formula, the temperature of the filament inside the bulb is changed by a factor of 10⁰'²⁵.
To tackle this issue, we need to understand black body radiation. A black body object's energy emission is inversely proportional to its area and the temperature to the fourth power. It may be established that
P = A . e . σ . T⁴
where P (power), A (surface area), e (emissivity), ( 5.67 x 10¯⁸ W/m²K⁴), and T (temperature) are all variables.
From the question above, we know that
P1 = 10 watt
P2 = 100 watt
T1 = T1
By using the black body radiation formula, the ratio of temperature is
T1⁴ / T2⁴ = P1 / P2
Hence,
T1⁴ / T2⁴ = P1 / P2
T1⁴ / T2⁴ = 10 / 100
T1⁴ / T2⁴ = 1 / 10
T2⁴ = 10T1⁴
T2 = ⁴√(10T1⁴)
T2 = T1 x 10⁰'²⁵
Thus, the temperature of the filament inside the bulb is changed by a factor of 10⁰'²⁵.
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without calculating the result, find the number of significant figures in the following product.
(3.52 x 10^-11) x (7.823 x 10^11)
The number of significant figures in the product is 2.7537 x 10¹.
What is significant figure?
The term significant figures refers to the number of important single digits in the coefficient of an expression in scientific notation.
Result of the calculation(3.52 x 10^-11) x (7.823 x 10^11)
= (3.52 x 7.823) x (10⁻¹¹ ⁺ ¹¹)
= 27.53696 x 10⁰
= 27.53696
= 2.7537 x 10¹
Thus, the number of significant figures in the product is 2.7537 x 10¹.
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please help if can! thanks
If the mass of squirrel is 0.40g and the force by which boat pulls the squirrel is 2N, then the acceleration of squirrel is 5 m/s²
Given,
Force = 2N
Mass = 0.4kg
What is Newton's second law of Motion?According to Newton's second law of motion, the rate of change of momentum is directly proportional to the force.
F = ma ----(1)
where,
m is the mass of the body
a is the acceleration by which body move
F is the force
From 1 equation,
a = F/ m
By substituting all the values, we get
a = 2/0.4
a = 5
Thus, we concluded that if the mass of squirrel is 0.40g and the force by which boat pulls the squirrel is 2N, then the acceleration of squirrel is 5 m/s².
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18. Calculate the velocity of a ball that rolled to the right 20 cm in 3 seconds.
-4m/s^2 the velocity of a ball that rolled to the right 20 cm in 3 seconds
Vi = 20m/s
Vf = 0
t = (t2 - t1) = 8s -3s = 5s
Vf - Vi = a*5s
a = (0- 20m/s)/5s = -4m/s^2
What does velocity mean?Velocity is a measure of speed in motion or activity. A more concise word for celerity is speed. Physics uses the word "velocity" specifically to describe how quickly and in what direction an object's location changes. It is a vector quantity that expresses the speed and direction of a body's motion.
Velocity is the term for the rate at which a displacement changes. Acceleration is the measure of a change in velocity. Velocity is a vector quantity because it comprises both magnitude and direction. Acceleration is a vector quantity because it is the speed at which velocity varies.
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2.
Which of the following statements best explains why measured data must include
units?
A. A measurement must have units from a standard system.
B. Units aid communication with other scientists.
C. Units must match the quantity being measured.
D. A measurement must have units to be meaningful.
A measurement must have units to be meaningful.
Scientific measurements are generally based on the International System of Units. It is important to always include units when recording data, calculating, and reporting results. Units are globally recognized and necessary for the exchange of information among scientists around the world.
A conversion factor is a factor used to convert from one unit of measurement to another. Simple conversion factors can convert meters to centimeters, while more complex conversion factors can convert miles per hour to meters per second. The International System of Units commonly abbreviated as SI from the French Le Système International d'Unités is the modern metric system. SI was founded in 1960 by the 11th General Assembly of Weights and Measures.
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Capacitance is the measure of a capacitors ability to store an electrical charge.
a. true
b. false
True
Capacitance is the ability of a component or circuit to collect and store energy in the form of an electrical charge.
what is electric charge?Electric Charge is the property of subatomic particles that causes them to experience a force when put in an electric and magnetic field. Electric charges are of two sorts: Positive and Negative, commonly carried by charge carriers protons and electrons.
Electric charge is a scalar quantity. Apart from having a magnitude and direction, a quantity to be named a vector ought to too comply the laws of vector addition, such as triangle law of vector addition and parallelogram law of vector addition; as it were at that point the amount is said to be a vector quantity. When two currents meet at a intersection, within the case of an electric current, the resultant current of these will be an algebraic sum and not the vector whole. Subsequently, an electric current may be a scalar quantity, in spite of the fact that it has magnitude and direction.
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Complete the statement: the furanose form of fructose is generated by formation of a hemiketal involving the attack of the hydroxyl group on carbon ____ with carbon ____ .
The furanose form of the fructose is generated by formation of a hemiketal involving the attack of the hydroxyl group on carbon 5 with carbon 2.
What is furanose form of fructose?Furanose can be drawn in the different structures such as Haworth structures and Fischer projections. But arrangement of atoms in the plane of the ring and Ch2Oh groups outside the plane of the ring can be clearly understood from Haworth structures. By looking at the Haworth furanose ring, one can observe that the −OH group on the second carbon is placed in two different ways on the plane of the ring. If hydroxyl group −OH is placed below the ring then it can be called as alpha form. If the −OH group is placed above ring, then it is named as beta furanose. These two forms are similar in all the respects except in stereo-geneticity. Furanose can form pyranose rings also by hemiketal formation of carbonyl of second carbon and hydroxyl of sixth carbon. This results in the formation of pyranose form of fructose. But predominant form of fructose among both is furanose rings. In both these form anomers are possible.
The furanose form of the fructose is generated by formation of a hemiketal involving the attack of the hydroxyl group on carbon 5 with carbon 2.
(This generates five-member furanose ring typical of fructose.)
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When earth catches up to a slower-moving outer planet and passes it in its orbit, in the same way that a faster runner overtakes a slower runner in an outside lane, the outer planet.
When Earth gets closer to a slow-moving outer planet and surpasses it in its orbit, that outer planet shows retrograde motion, similar to how a quicker runner goes past a slow runner in the outside lane.
The orbital movement of a spatial entity in the opposite direction of what is usual in a specific system is known as retrograde motion. The term "retrograde" is based on the Latin terms retro, which means "backward," and gradus, which means "step." As observed from Polaris, all main planets in the Solar System circle the Sun counterclockwise.
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A thermometer is used to measure a temperature of 80°C. Which thermometer is the most sensitive?
please answer...will mark as branliest....need help!
Answer:
gas thermometer is more sensitive
According to usual sign convention, thermal expansion creates a negative strain.
a. true
b. false
According to usual sign convention, thermal expansion creates a negative strain. TRUE
What does thermal expansion mean?The propensity of matter to vary in volume in response to temperature changes is known as thermal expansion. A substance’s particles move more when it is heated, maintaining a greater average separation. Thermosets experience linear thermal expansion since they are employed in solid form.
What three forms of thermal expansion are there?The term “thermal expansion” refers to an object’s propensity to change its dimensions as a result of heat, including length, density, area, and volume. The substance’s kinetic energy increases when it is heated.
There are three forms of thermal expansion:
Linear growth.
Area enlargement
Volume increase
What causes thermal expansion?When an object’s temperature rises, it expands or grows in size, a process known as thermal expansion. Thermal expansion takes place
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The diameter of a copper wire is 3mm. Express this diameter in meters.
Answer:
0.003 meters
Explanation:
[tex]d=3mm(\frac{1m}{1000mm} )=\frac{(3)(1)}{1000} =\frac{3}{1000} =0.003m[/tex]
Hope this helps
Answer:
3× 10^ {-3}m
Explanation:
3mm=0.003m
0.003= 3× 10^ {-3}
- How fast is the ducky going when it hits the ground?
Answer:
Doesn't matter how fast it was going, all that matters now is that little ducky went splat and he is living no more
Explanation:
There is not enough information
There is no ground.
There is no ducky.
And it is not moving.
NASA is launching a rocket into space from Earth. This particular rocket burns its fuel for 5
minutes and then turns off its engines. At this point, the rocket keeps floating along through
space at a speed of 10 km/s.
What is the rockets average acceleration during these first 5 minutes?
The rockets average acceleration during these first 5 minutes is 33.33 m/s².
What is average acceleration?The average acceleration of an object refers to the rate at which the velocity changes with time of motion of the object.
a = Δv/Δt
where;
Δv is change in velocity of the objectΔt is change in time of motionThe given parameters include;
v = 10 km/s = 10 km/s x 1000 m/1km = 10,000 m/s
t = 5 minutes = 5 x 60 s = 300 seconds
a = 10,000 / 300
a = 33.33 m/s²
Thus, the rockets average acceleration during these first 5 minutes is 33.33 m/s².
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The radius of a tungsten atom is 137 pm. how many tungsten atoms would have to be laid side by side to span a distance of 3.51 mm?
2.5 × 10⁻⁷ atoms will occupy 3.51 mm.
Firstly converting the radius of a tungsten atom from picometer to millimeter.
As per the known fact, 1 pm = 10⁻⁹ mm
Radius in mm = 137 × 10⁻⁹ mm
Radius in mm = 1.37 × 10⁻⁷ mm
Now, if atoms are laid side by side, then the distance occupied by each atom will be equal to it's diameter.
Now, 1.37 × 10⁻⁷ mm space is occupied by : 1 atom
Space occupied by 3.51 mm = (1÷ 1.37 × 10⁻⁷)×3.51
Performing multiplication and division
Space occupied by 3.51 mm = 2.5× 10⁻⁷ atoms
Hence, 2.5× 10⁻⁷ atoms will occupy 3.51 mm.
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As we study mass, volume, and density, we will compare the measurements of actual objects. Let's see how you do measuring mass. Download the activity worksheet to record your data. Begin by finding ten rectangular-shaped objects and measure the mass using a scale (any scale will do as long as it works). You can choose books, sandwiches, phones, pictures - as long as the shape is a rectangle. Then rank the objects from the one with the heaviest mass to the one with the lightest mass in the space provided. We will continue to measure, so once you are finished, continue with the lesson; but save your data worksheet - you'll need to complete the rest of the worksheet as we progress.
The mass of objects such as books, sandwiches, phones, pictures can be measured using a weighing balance scale.
What is the mass of an object?The mass of an object is defined as the scalar quantity of that object that shows the amount of matter that makes up the object.
Mass is called a scalar quantity as it doesn't require the direction of an object but only it's magnitude to be measured.
it is measured in Kilograms or Kg using a weighing balance scale.
The volume of an object is the relationship that exists between its height, length and width. That is, L×W×H.
The volume of the ten rectangular shaped objects given above can be measured once the height, length and width of the objects are known.
The density of the objects is the relationship that exists between the mass and the volume of the object. That is,
Density= mass/volume.
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The size of a certain insect population is given by p(t)=200e.02t, where t is measured in days. at what time will the population equal 800?
With the help of the mathematical concept of Functions in physics, the number of days for population to reach 800 will be approximately 69 days.
What are Functions in physics?Functions in physics is a mathematical concept used to represent different types of physical quantities in nature. Some types of functions are- linear, quadratic, cubic, exponential and reciprocal functions. A functions relates a set of inputs with another set of desired outputs. Functions are essential for formulating physical relationships in theoretical and practical sciences. For example, functions can be widely used in the representation of electric and magnetic fields in space and time, they are used in quantum mechanics, it is very widely used in determining the position and motion of an object in space. We perform a variety of mathematical operations on functions to make some conclusions and to answer some typical questions related to a physical system.
Here in this question, we have a function which represents a certain population of insect, the function is given by,
[tex]P(t)=200e^0^.^0^2^t[/tex]
where [tex]t[/tex] represents the number of days.
We have to find the total time in days for the population to reach 800 insects, that means,
[tex]P(t)=800[/tex]
Hence,
[tex]200e^0^.^0^2^t=800[/tex]
[tex]e^0^.^0^2^t=\frac{800}{400}[/tex]
[tex]e^0^.^0^2^t=4[/tex]
Taking natural log both sides
[tex]ln e^0^.^0^2^t=ln 4\\[/tex]
[tex]0.02t=ln4[/tex]
[tex]t=\frac{ln4}{0.02}[/tex]
[tex]t=69.3\\[/tex]
[tex]t=69[/tex] days (appproximately)
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How long does it take light to travel through a 2.0- mm -thick piece of window glass?
Light travels at the exact speed of 299,792,458 meters (983,571,056 feet) per second in a vacuum.
The light passes through a 2.0-mm-thick section of window glass
= 1 × [tex]10^{-14}[/tex] sec
What is speed?
Speed is defined as the rate at which an object's position changes in any direction. Speed is calculated as the ratio of distance traveled to time spent traveling. Speed is a scalar quantity because it has a direction but no magnitude. The SI unit of speed is milliseconds per second.
There are several types of speeds:
Consistent speedSpeed controlSpeed in an instantThe average speedSpeed RelativeSpeed is the street name for amphetamine sulphate, but it can also refer to other amphetamines. It's usually an off-white or pinkish powder that resembles crystals. It is also available in the form of a paste, which is usually white/grey or brown in color and can be damp and gritty.
Hence,
A thick piece of window glass = 2 mm
speed of light in medium = speed of light in vacuum / refractive index
= (3×[tex]10^{8}[/tex])/1.5
= 2 ×[tex]10^{8}[/tex] m/s
Time = distance / speed
= (2 × [tex]10^{-3}[/tex] )/(2 × [tex]10^{-11}[/tex])
= 1 × [tex]10^{-14}[/tex] sec
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A light-rail commuter train accelerates at a rate of 1.40 m/s2. how long does it take to reach its top speed of 76.5 km/h, starting from rest?
A light-rail commuter train accelerates at a rate of 1.40 m/s2, it take 15.17s to reach its top speed of 76.5 km/h, starting from rest.
What is the difference between speed and velocity?When describing the motion of the objects in terms of distance, time, and direction, physicists use the basic quantities of speed and velocity. Two terms and two distinct meanings. Yet, not uncommonly, we hear these terms used in interchangeably. So, what is the difference? Why is it incorrect to use terms speed and velocity interchangeably?
The reason is very simple. Speed is time rate at which an object is moving along a path, while velocity is the rate and direction of an object’s movement. Put another way, the speed is a scalar value, while velocity is a vector.
The mathematical calculation for speed is relatively straightforward, wherein the average speed of an object is calculated by dividing the distance traveled by the time it took the object to travel distance. Velocity, on the other hand, is more complicated mathematically and can be calculated in different ways, depending on what information is available about object’s motion. In its simplest form, average velocity is calculated by dividing change in position (Δr) by change in the time (Δt).
The formula to find the acceleration is:
[tex]a=\frac{v-u}{t}\\ t=\frac{v-u}{a}\\\\ =\frac{21.25-0}{1.40} \\\\ =15.17[/tex]
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How many sublevels are in the =3 level? sublevels: how many orbitals are in the =3 level? orbitals: what is the maximum number of electrons in the =3 level? electrons:
The s sublevel can only hold two electrons because it has one orbital. The p sublevel has three orbitals and a maximum capacity of six electrons.
The d sublevel may hold a maximum of 10 electrons due to its five orbitals. Additionally, the 4 sublevel has 7 orbitals and a maximum of 14 electrons.
What number of orbitals makes up sublevel 3?The third energy level has nine orbitals.
N is the number of orbits, while n2 is the number of orbitals (s).
How many orbitals can each set of quantum numbers identify at their greatest capacity?
As a result, the provided quantum number can only identify a maximum of one orbital, or 3pz.
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heat supplied at the rate of 120W to 60g of ice raises it's temperature from -20°c to 0°c in 200s. Calculate the I. heat capacity of the ice Ii. specific heat capacity of the ice. III. time it will take to melt all the ice at 0°c. (s.f=336000 Jkg/K
Answer:
aowbe9 wieveiq diqbedi diwbe
Explanation:
01837192
An object of mass 80 kg fell off a 100 m cliff, with an audible thump. how much energy was released during the collision?
According to potential energy, the energy released is 78.4 kJ.
We need to know about potential energy to solve this problem. The potential energy is the object's energy caused by its position. Potential energy can be determined as
PE = m . g . h
where PE is potential energy, m is mass, g is the gravitational acceleration (9.8 m/s²) and h is height.
From the question above, we know that
m = 80 kg
h = 100 m
By substituting the given parameters, we can calculate the height
PE = m . g . h
PE = 80 . 9.8 . 100
PE = 78400 joules
PE = 78.4 kJ
Hence, the energy released is 78.4 kJ.
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For horizontally-launched projectiles, which of the following describes acceleration in both directions with a⃗ x=0 and a⃗ y=−9.8 m/s2
A. Acceleration is −9.8 m/s2 in both directions.
B. Acceleration is constant in both directions.
C. Acceleration is equal in both directions.
D. Acceleration is zero in both directions.
For horizontally-launched projectiles, the acceleration is constant in both directions; option B.
What are projectiles?Projectiles are objects which are launched into space and allowed to fall freely under the effect of gravity.
The motion of projectiles is known as projectile motion.
The path of a projectile motion is a parabola.
When an object or a ball is launched into the air, it moves with a constant downward acceleration.
The direction of acceleration due to gravitational force of the earth is constant in both directions.
Therefore, since the acceleration in the x-axis is zero and acceleration in the y-axis is -s -9.8 m/², the acceleration is constant in both directions.
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What charge must a 0.100-mg drop of paint have to arrive at the object with a speed of 10.0 m/s?
The electrical charge of the metal sphere is ∈ = 2.78×10⁻⁷C
The value of the load or strength of the paint droplet is ∈ = 2×10⁻¹⁰ C
What are forces?Forces are the definition of Newton's second law, which is stated under the relation:
∑ Force = mass × acceleration.
In other words, force is the origin of motion since it generates acceleration in a system.
Completamos el enunciado:
"An electrostatic paint sprayer has a 0.200-m-diameter metal sphere at a potential of 25.0 kV that repels paint droplets onto a grounded object. (a) What charge is on the sphere? (b) What charge must a 0.100-mg drop of paint have to arrive at the object with a speed of 10.0 m/s?"
We must determine the charge on the sphere initially.
a) We determine the radius of the sphere:
r = 0.2m/2
r = 0.1mPotential = 25000V∈ = rV/k
∈ = (0.1m)(25000V) / (9×10⁹Nm²/C²)
∈ = 2.78×10⁻⁷C
b) If the mass of the paint drop is 0.1mg, and it moves with a velocity of 10m/s, we determine the kinetic energy.
Ke = mV²/2
Ke = 0.1×10⁻⁶kg (10m/s)² / 2
Ke = 5×10⁻⁶J = ΔE
∈ = ΔE/ ΔV
∈ =5×10⁻⁶J / 25000V
∈ = 2×10⁻¹⁰ C
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We have looked at generational cohorts (e.g., gen x, millennials and gen z) in class. these are helpful to marketers, since ________________________.
We have looked at generational cohorts (e.g., gen x, millennials and gen z) in class. these are helpful to marketers, since all consumers within a generational cohort share the same lifestyle preferences
Organizations Have 3 Basic Functions Marketing, Operations and Financeoperation is the part of a business organization that is responsible for producing goods or services, Influences all of the rest of the organization and the actual doing part of the business processOperations Management is the management of systems or processes that create goods and/or provide services. it affects: Companies' ability to competeFeedback is the measurements taken at various points in the transformation processTo know more about Operations Management visit : https://brainly.com/question/16289727
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An outside force, fo, brings two small metal spheres, a and b, at rest from a long distance away to a point where they are:________
They are 1 meter apart.
What is the definition of force?The definition of force in physics is that it is a push or pull on a massed object that helps change its velocity.
An external force is a kind of agent that has the power to alter any type of resting or moving condition of a body. It has got its own direction and a magnitude.
What in force defined as in science?One thing experiences a force from another. There are both living things and non-living objects in the concept of a force.
All objects, living and non-living, have the ability to exert a force on or against another item, as well as have their actions affected by forces.
Describe a force unit.The newton, abbreviated N, is the SI unit of force. The meter and unit are the foundation units that pertain to force.
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When the pilot reverses the propeller in a boat moving north, the boat moves with an acceleration directed south. Assume the acceleration of the boat remains constant in magnitude and direction. What happens to the boat?.
The boat will eventually stops and then speeds up in the reverse direction.
Because the object has an initial positive (northward) velocity and a negative (southward) acceleration; so, a graph of velocity versus time slopes down steadily from an original positive velocity. Eventually, the graph cuts through zero and goes through increasing-magnitude negative values.
Acceleration is the name we give to any process where the velocity changes. Since velocity is a speed and a direction, there are only two ways for you to accelerate: change your speed or change your direction—or change both.
Magnitude is defined as the maximum extent of size and the direction of an object. Magnitude is used as a common factor in vector and scalar quantities. By definition, we know that scalar quantities are those quantities that have magnitude only. Whereas vector quantities are those quantities that have both magnitude and direction.
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if you drop a rock from a height of 17m, it accelerates at g and stikes the ground 1.86263s later. If you drop the same rock from half the height, what will be the acceleration?
If you drop the same rock from half the height, the acceleration will be 4.9 m/s².
Acceleration of the object
The acceleration of the object dropped from half of the given height is calculated as follows;
h = vt + ¹/₂at²
where;
v is the initial velocity of the objecta is the acceleration of the objectt is time of motionh = 0 + ¹/₂at²
h = ¹/₂at²
2h = at²
a = 2h/t²
a = (2 x 0.5h)/t²
a = (h)/(t²)
a = (17 m) / (1.86263²)
a = 4.9 m/s²
Thus, if you drop the same rock from half the height, the acceleration will be 4.9 m/s².
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