A body is pulled along horizontal plane by a constant force of 10N applied pavement to the plane. The work done in moving a distance 20m is (W)= 200 J.
What is work done?When some amount of force is acted on the object and it moves some distance that means some work has been done on the object. It can be measured in Joule.
How can we calculate the work done?To calculate the work done we are using the formula here is,
W=Fd
We are given here,
F= The amount of force acting on the body. = 10N
d= The distance the object move. = 20m
We have to calculate the values of work done = W
Now we put the values in the equation we get,
W= Fd
Or, W= 10*20
Or, W= 200N
From the calculation we can say that, The work done in moving a distance 20m is (W)= 200 J.
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A body is pulled along horizontal plane by a constant force of 10N applied pavement to the plane. calculate work done in moving a distance 20m
What is the direction of the net force acting on an the plant that is experiencing a force of 20N in the North and a second force of 15N to the West? Report answer using Angle of Rotation (ie: 27° N of W) I need to do the following:1. Draw a free body diagram2. Identify Givens and Unknowns3. Identify the Equations4. Set up the equation using the givens and unknowns5.Solve
1. The free body diagram is shown below:
2.
Given:
F1 = 20N
F2 = 15N
Unknowns:
θ: direction of the net force = ?
3.
In order to find the unknown angle θ, use the tangent function, as follow:
[tex]\tan \theta=\frac{opposite}{adjacent}[/tex]where opposite is F1 and adjacent is F2. To obtain θ it is necessary to apply inverse tangent.
5. Then, you have:
[tex]\theta=\tan ^{-1}(\frac{20N}{15N})=53.13[/tex]Hence, the direction is 53.13 degrees to the north of the west
1. What is the slope of the graph below?
position (m)
30
20
10
O
5 10
15
time (s)
Answer:
type good your question
Ricardo starts from rest and runs for 12 seconds. He reaches a final velocity of +9 m/s. Find Ricardo’s acceleration.
Answer:
Assuming his Acceleration is constant and consistent, he accelerates at .75 m/s^2
Explanation:
what centripetal force is needed to keep a 2 kg sack of flour moving at a constant speed of 4 m/s in a circle having a radius of (a) 4 meters (b) 8 meters?
Centripetal force needed to keep the 2 kg sack of flour (a) in a circle of radius 4 meters is 8 N and (b) in a circle of radius 8 meters is 4 N.
What is centripetal force?Centripetal force can be defined as a necessary force acting of a body moving in circular or curved path in the direction of inwards towards a fixed point. Due to having both magnitude and direction, it is a vector quantity. SI unit of centripetal force is Newton (N).
We know that.
centripetal force = [tex]\frac{mv^{2} }{r}[/tex]
Where,
m = mass of the moving object.
v = speed of the moving object.
r = radius of the circular path.
Given,
Mass of the sack of flour = m= 2 kg.
Speed of the moving object = v = 4 m/s.
Now for condition (a),
When, radius of the circular path = r = 4 meter.
Required centripetal force = [tex]\frac{mv^{2} }{r}[/tex] = [tex]\frac{2*4*4}{4}[/tex] N = 8 N.
And, for condition (b),
When, radius of the circular path = r = 8 meter.
Required centripetal force = [tex]\frac{mv^{2} }{r}[/tex] = [tex]\frac{2*4*4}{8}[/tex] N = 4 N.
So, required centripetal force for conditions (a) and (b) respectively 8N and 4 N.
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10. Light travels at 3.00 x 10^8 m/s. How far does it travel in 1.00 year? This distance is known as a "light-year". (Hint: calculate how many seconds there are in a year.)
The speed of light is 3.00 x 10^8 meters per second. A "light-year" is the measurement for this distance.
time = 31536000 seconds
First, We have to calculate the number of seconds in a year.
time = (365 days)
(24 hours/day)
(3600 seconds/hour)
time = 31536000 seconds
We can calculate the distance that light travels in this many seconds. distance = speed x time
distance = (3.00 x 10^8 m/s) (31536000 seconds)
distance = 9.46 x 10^{15} meters
A light year is 9.46 x 10^{15} meters
What is light year?
A light-year, also spelled lightyear, is a significant unit of length that is used to express astronomical distances. It is roughly 9.46 trillion kilometers in length.
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Jonathan is driving a car. He accelerates away from a stop
sign. His three-year-old daughter sits in the rear passenger
seat. On whom does the back of the seat exert a greater
force? Explain your answer.
When car accelerates away from a stop sign, back of the seat exert a greater force on the rear passenger seat.
The reason is that when the car is accelerating, the frictional moment of the ground that give the rear wheel of the car its driving wheel is more than the gravity moment of the car. This is the reason that the car will tilt its head.
Newton’s first law states that objects in motion stays in motion and objects at rest stays at rest. So the accelerating car is overcomes the inertia the body mass is exerting on the seat.
When car accelerates forward, the backward sensation is caused by body's inertia.
The driver is less affected because the driver’s seat is adjusted to have better control on the car. The steering wheel also serves as a support to the forces applied to the driver . The passenger’s seat is generally adjusted for maximum comfort that’s why the passenger is not as supported on the seat as compared to the driver.
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29.In which of the following pictures is the average kinetic energy of molecules the highest?Select one:a. Ab. Bc. Cd. D
We will have that the picture that shows the highest average kinetic energy is image B.
You are driving around the streets of Pittsburgh and find yourself on Canton Avenue.
While driving up this incredibly steep road, the steepest road in all of america, you find
that the total length you have driven is 31 m. At that time you also notice a roadside sign
that indicates that your elevation has increased by 10.6 m. What is the angle of the road
above the horizontal?
the angle of the road such that the alleviation is 10.6 meters and the distance traveled is 31 meters is 20°.
what are trigonometric ratios?
Trigonometric Ratios are defined as the values of all the trigonometric functions based on the value of the ratio of sides in a right-angled triangle. The ratios of sides of a right-angled triangle with respect to any of its acute angles are known as the trigonometric ratios of that particular angle.
given:
the total length you have driven is 31 m
elevation has increased by 10.6 m
if we will image the architecture of the structure that will be formed, we will see that the after joining the highest point perpendicularly downward we end up with a right-angled triangle.
if we wish to find the alleviation of the road, we can simply use trigonometric ratios.
using the sine trigonometric ratio we get,
sin (angle of alleviation) = perpendicular distance/distance travelled by the car
sin (angle of alleviation) = 10.6/31
sin (angle of alleviation) = 0.341
sin (angle of alleviation) = 19.93°
therefore, the angle of the road such that the alleviation is 10.6 meters and the distance traveled is 31 meters is 20°.
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Which if the following topics will be covered in Physical Science A? (4)
Group of answer choices
Anatomy
Bonding
Elements
Genetics
Matter
Newton's Laws of Motion
Reactions
Answer:
I'm not going to give you the direct answer because you shouldn't cheat but I will give a hint
Explanation:
Physics, chemistry, astronomy, geology and other disciplines concerned with the study of non-living things are examples of physical science.
The only kind of radiation that earth’s surface emits is infrared (ir) radiation.
a. True
b. False
The statement is true. Solar radiation, also referred to as ultraviolet or shortwave radiation, is emitted by the Sun. Longwave or infrared radiation is emitted by the Earth.
Because they are cooler than the surface of the sun, the earth and its atmosphere emit infrared radiation with longer wavelengths than solar radiation. The 3 - 100 m range contains the majority of the energy of the infrared radiation that the earth and its atmosphere emit. Infrared is the thermal emission (or heat) from our planet that earth scientists study. Some of the energy from incident solar radiation that strikes Earth is absorbed by the atmosphere and the surface, warming the planet. Infrared radiation, which is emitted by the Earth, is what causes this heat.
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You throw a ball upward with an initial speed of 4.8 m/s . When it returns to your hand 0.98 s later, it has the same speed in the downward direction.What was the average acceleration vector of the ball?
Answer:
a = (V2 - V1) / t average acceleration between points 1 & 2
V2 = speed at bottom = -4.8 m/s
V1 = 4.8 m/s speed when thrown, choosing upwards as positive
a = (-4.8 - 4.8) / .98 time upwards = time downwards
a = -9.6 m/s / .98 s
a = -9.8 m/s^2
two flat mirrors are connected to each other such that they make an angle of ψ. a laser enters the system and first reflects off the bottom mirror, then the top mirror. when the beam exits it makes an angle of θ
The angle is 53.5 degrees.
What is a flat mirror?
A plane mirror is a mirror with a flat (planar) reflective surface. For light rays striking a plane mirror, the angle of reflection equals the angle of incidence.
This ques have been solved in two steps:
Step 1:
given that;
Θ=107 degrees
from figure,
∠BAC=180-ψ-(90-φ)
∠BAC= 90-ψ-φ
∠AOC=180-2(ψ-φ)-2φ
∠AOC=180-2φ
Step 2: part(a)
writing an expression for the psi at point o:
Θ+180-2ψ=180
2ψ=Θ
ψ=Θ/2
above is the expression for ψ
Step 3: part(b)
The angle of ψ is,
ψ=Θ/2
ψ=107/2
ψ=53.5 degrees
Hence, the angle is 53.5 degrees.
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It requires 350 joules to raise a certain amount of a substance from 10.0°C to 30.0°C. The specific heat of the substance is 1.2 J/g°C.
What is the mass of the substance?
The mass of the substance is 14.58g.
Solution:
Heat ΔQ = 350J
Initial temperature T = 10°C
Final temperature [tex]T^{1}[/tex] = 30°C
Change in temperature:
ΔT =[tex]T^{1}[/tex] - T
= 30 - 10
= 20°C
Specific heat: 1.2 J/g°C
The mass of a substance:
ΔQ = mcΔt
m = ΔQ/cΔt
= 350/1.2 x 20
= 14.58 grams.
Molecular weight is the sum of the average masses of the atoms in the molecule of a substance. It is calculated by adding together the atomic masses of the elements in the substance and multiplying each by the index of the molecular formula. The mass of 1 mole of a substance in 1 gram is called molar mass.
Find the atomic weight of each element in the formula, multiply by the number of atoms of that element in the compound, and add to all other elements. This gives the 1 mole mass of the molecule in grams. The molar mass of a substance is the mass in grams of one mole of that substance. This mass is the atomic mass of the chemicals that make up the substance, expressed in atomic mass units AMU.
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A cannonball is launched horizontally from the top of a cliff 10.4 meters high, and lands
20.8 meters away from the base of the cliff. What is the horizontal velocity (vx) with
which the cannonball was launched?
The horizontal velocity with which the Cannonball was launched is 14.28m/s .
What is velocity?
velocity is defined as the rate of change of displacement of the body.
mathematically,
v = s/t
where, v is velocity,
s = displacement
t = time
Given,
A cannonball is launched horizontally from the top of cliff which is 10.4 meters high.
and it lands 20.8 meter away from the base of the cliff.
Here, h = 10.4 m and x = 20.8 m
According to the formula of the projectile fired horizontally from a certain height,
x = u ×√(2h/g)
20.8 = u × √(2×10.4/9.8)
20.8 = u × 1.456
u = 20.8/1.456 = 14.28 m/s
Thus,the horizontal velocity with which the Cannonball was launched is 14.28m/s .
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3. Three forces are acting on an object (Figure 1. 32) which is in equilibrium. Determine force A. 1200 N 51. 3° Force A 42. 00 1400 N
Asin+1200sin51.3+1400sin42=Asin+1896 N is the resulting force in the vertical direction. This also equals zero.
When three forces are in balance, the forces are either?When a three-force member is in equilibrium, the forces must be contemporaneous if they are not parallel. As a result, the lines of action of all three forces operating on such a component must cross at some point; hence, any single force is the equilibrant of the other two forces.
When the outcome of three vectors is a Null vector, i.e. it has no magnitude and direction, the three vectors are at equilibrium. The product of three vectors equals the vector sum of the vectors.
When a thing is in equilibrium, its forces are balanced.
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A boy is pulling a sled with a rope pulled over his shoulder so the angle the rope makes
with the horizontal is 50°. If the sled has a mass of 100 kg, and the coefficients of friction
are μs = 0.6 and Uk = 0.3, what force on the rope is necessary to move the sled at a
constant acceleration of 0.1 m/s?
Answer:
348.7 N
Explanation:
Static friction coeff not needed.
This is a little complicated because some of the force on the rope (F) is making the Normal Force ( and thus the frictional force) less
Normal force will be ( 100 ( 9.81) - F sin(50) )
then friction becomes .3 ( 100(9.81) - F sin 50)
Force pulling horizontally will have to be
F = ma
100 kg * .1 m/s = 10 N PLUS the effort to overcome friction
So the horizontal force will be
10 + ( .3( ( 100)(9.81) - F sin50 )) <===simplify a bit
10 + 294.3 - .3 F sin50
304.3 - .3 F sin50 = horizontal force
The horizontal force is also given by F cos 50 Now we can equate the two underlined items above
304.3 - .3 F sin 50 = F cos 50
304.3 = F ( cos50 + .3 sin50)
304.3 / ( cos 50 + .3 sin 50) = F = 348.7 N
two people x and y stand in a straight line at a distance of 330metres and 660metres from a high wall respectively find the time interval taken for x to hear the first and second echo sounds when y makes a loud sound
As a result, it stands to reason that the speed of sound in air and other gases should be proportional to the square root of temperature. While not insignificant, this is not a significant dependence. The speed of sound at 0°C is 331 m/s, while at 20.0 °C it is 340m/s, a 4% increase.
Time interval taken for x to hear the first = 660-330/340
=330/340 = .97 sec
time interval taken for x to hear second echo sounds = 660+330 / 340
= 2.91 sec
interval taken for x to hear the first and second echo sounds = 2.91 -.97
= 1.94 sec.
What is velocity of sound ?As a result, it stands to reason that the speed of sound in air and other gases should be proportional to the square root of temperature. While not insignificant, this is not a significant dependence. The speed of sound at 0°C is 331 m/s, while at 20.0 °C it is 343 m/s, a 4% increase.Determine the wavelength of the sound corresponding to the note of middle C, assuming the speed of sound in air is 340 m/s. Allow = wavelength. Use v = f •, where v equals 340 m/s and f equals 256 Hz. Rearrange the equation so that it looks like = v / f.speed of sound = 340 m /s..
Time interval taken for x to hear the first = 660-330/340
=330/340 = .97 sec
time interval taken for x to hear second echo sounds = 660+330 / 340
= 2.91 sec
interval taken for x to hear the first and second echo sounds = 2.91 -.97
= 1.94 sec.
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what happens to the particles in the ice cream as it freezes
The particles in the ice cream as it freezes will come together.
What is freezing?
Freezing is a phase change that occurs in liquid substances, where a liquid turns into a solid when its temperature is lowered below its freezing point.
When a liquid substance freezes, the particles of the substance comes together because the mean distance between the particles has been reduced due to decrease in temperature.
If we consider ice cream, when it freezes as a result decrease in temperature, it solidifies because the molecules are closer to each other.
Thus, when the temperature of an ice cream reduces, the ice cream will solidify.
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in a certain nuclear reactor, neutrons suddenly collide with carbon nuclei, which have 12 times the mass of neutrons. in a head-on elastic collision with a stationary carbon nucleus, what fraction of its initial speed does the neutron have after the collision?
carbon atomic mass Equals m2
neutron mass = M,
as mg 12m1 = the speed of the neutron following a collision
m1 - m2 / m1 + m2 * u1 = v1
= [(-12m1+m1) / 13m1] * u1
= [(-12+1) 13] * u1
v1 = -11/13*u1
Neutron speed equals 11/13 starting speed.
Response: 11/13
A nuclear reactor is a device used to start and regulate nuclear chain reactions involving fission or nuclear fusion. Nuclear reactors are used in nuclear power plants to produce electricity and in nuclear propulsion for ships.
The neutron, symbol n or n0, is a subatomic particle with a neutral charge and slightly more mass than a proton. Atomic nuclei consist of protons and neutrons.
The element with atomic number 6 carbon has small, straightforward atoms. Six positively charged protons make up the nucleus, and there are six electrons outside the nucleus that are split between two shells.
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Two students drop an object into sand from a height of 1.5 meters. They record the depth of the hole made in the sand by each student's object What is the most likely explanation for the results? (1 point) O Maddie's object had a faster drop speed O Naveed's object has less mass O Naveed's object had greater kinetic energy O Maddie's object has a smaller width
Weight is the force of gravity on mass, which is intrinsic to matter. Remember that F=ma. The acceleration due to gravity is independent of the mass of the object falling, but the force it feels, and thus the weight of the object, is.
They record the depth of the hole made in the sand by each student's object gives the idea about the mass of the objects.
Naveed's object has less mass
Is gravity affected by mass?Gravitational force is a force that attracts masses. The gravitational force grows in proportion to the size of the masses (also called the gravity force). The gravitational force weakens rapidly as the distance between masses grows.Given two identically sized but different materials objects, the heavier (denser) object will fall faster because the drag and buoyancy forces are the same for both, but the gravitational force is greater for the heavier object.Weight is the force of gravity on mass, which is intrinsic to matter. Remember that F=ma. The acceleration due to gravity is independent of the mass of the object falling, but the force it feels, and thus the weight of the object, is.
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Would appreciate some help :)
Answer:
a
Explanation:
Suppose you look at a star that can be seen through the edge of a dusty interstellar cloud. The star will look __________ than it would if it were outside the cloud.
The star will look dimmer and redder than it would if it were outside the cloud.
What makes up an interstellar cloud?
Interstellar clouds mostly made of dust and gas can be found in the space between the stars. In interstellar molecular clouds, over 100 molecules (neutrals, ions, and radicals), predominantly carbon-containing compounds, have been discovered.
What do you name an interstellar cloud?
A molecular cloud is an interstellar clump or cloud that is opaque due to the presence of dust grains within it. The shape of such dark clouds is exceedingly irregular: they have no clearly defined outer boundaries and, due to turbulence, can take on convoluted serpentine patterns.
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the angle of projection at which the horizontal range and maximum height of projectile are equal is
The angle of projection at which the horizontal range and maximum height of projectile are equal is 75.96⁰
What is horizontal distance or range of a projectile?
The horizontal distance or range of a projectile is the maximum horizontal distance travelled by the projectile.
Mathematically, the formula for the range of a projectile is given as;
R = u²sin2θ/g
where;
u is the velocity of the projectileθ is the angle of projectiong is acceleration due to gravityThe maximum height travelled by a projectile is given as;
H = u²sin²θ/2g
Solve the two equation together;
u²sin2θ/g = u²sin²θ/2g
2u² sinθcosθ = u²sin²θ/2g
4cosθ = sinθ
4 = tanθ
θ = arc tan(4) = 75.96⁰
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100 POINTS AND BRAINLY PLEASE HELP QUICK QUESTION I'M DESPERATE
Question 13(Multiple Choice Worth 2 points)
As a beginner bowler, Maria gets frustrated that her shots very rarely knock down any pins. Her Mom says that her arm movement looks awkward before releasing the ball. Maria feels like she needs to improve arm swing motion. How can Maria improve her bowling technique to be more successful?
Increase the weight of the ball to gain more control
Push the ball out away from her on the first step
Put more spin on the ball so that it curves prior to hitting the pins
Take fewer steps before releasing the ball to decrease her arm speed
Push the ball out away from her on the first step. Option B.
The key to consistent shots is the angle at which you pocket the ball. For right-handed bowlers, the pocket is between the 1st and 3rd pins. If you are left-handed it will be between pins 1 and 2. Keep your arms straight as you bring them back for the backswing and try to stay close to your body throughout the throw. Timing is important when releasing the ball.
A simple way to determine where the ball should exit the edge of the oil sample is simply to apply the rule of 31. Subtract 31 from the oil pattern distance. This will give you the board number where the ball ends the pattern. As a rule of thumb, right-handed bowlers place the inside of their left foot on the midpoint, and left-handed bowlers do the same with their right foot. Then stand with your other leg slightly behind you about 2 inches apart.
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Answer:
Maria can improve her arm swing motion in bowling by developing a free swing, where instead of controlling the ball with her arm, the ball controls her arm. This can be achieved by putting only mild to light grip pressure on the ball and pushing it back while standing relaxed. This will let the ball down and the gravitational energy will get her arm to the apex. As soon as she reaches the apex, she’ll have to slide forward and release the ball without pulling and grabbing.
Out of the options you provided, pushing the ball out away from her on the first step seems to be a good way for Maria to improve her arm swing motion in bowling.
So your answer would be (A) pushing the ball out away from her on the first step.
The distance between two successive crest is 5 m at
a frequency of 12 Hz.
(i) what is the wave velocity?
(Il)If there is a crest at × = 3m at time t, find three other positions of the crest at that instant. (iii) What time later will there be another crest at x =
3т?
(iv) If the amplitude of the wave is 1.5 m, write the equation of the wave.
A periodic or cyclic motion's wave velocity is the distance it travels in a unit of time (in any direction).(I) the wave velocity 60 m/s.(ii) The three other position of the crest are 8m, 13m, 18m (iii) time period= 0.083 sec (iv) equation of the wave y(x, t)= 1.3 sin (kx-ωt+Ф)
what is wave velocity?
In other terms, wave velocity is the distance travelled by waves in a unit of time. The definition of wave velocity is stated as the velocity associated with the disturbance propagating in the specified medium.It is also known as phase velocity.Depends upon nature of the medium.(I) according to the wave velocity equation
v= wavelength* frequency= 5*12=60 m/s
(II) x=3m,
three other position of crest x1= x+λ= 3+5= 8m
x2= x+2λ= 3+10=13m , x3=x+3λ= 3+15=18m
(iii) time period= 1/ frequency=0.083 sec
(iv) amplitude given= 1.5 m
equation of wave y(x, t)= A sin (kx-ωt+Ф)
k= wave number
ω=angular frequency
A= amplitude of wave
x= horizontal position variable
t=time period
Ф=Phase
equation of the wave
y(x, t)= 1.3 sin (kx-ωt+Ф)
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If you were to take a voyage across the milky way, in what kind of material would you spend most of your time?.
You spend most of your time in warm, rarefied clouds of atomic hydrogen
What is milky way?
Our solar system is part of a galaxy called the Milky Way[b], which gets its name from how it appears to us on Earth: as a hazy strip of light in the night sky made up of stars that are too close together to be seen individually. The phrase Milky Way is a translation of the Latin route lactea from the Greek o (galaktikos kklos), meaning "milky circle"[18][19][20]. From Earth, the Milky Way appears as a band because its disk-shaped structure is seen from within. Using his telescope, Galileo Galilei first distinguished the band of light in 1610. Most astronomers believed that the Milky Way contained all of the stars in the Universe up until the early 1920s.
Back then, instead of being obscured by the glare of city lights, everyone in the world could look up at night and see a dark, starry sky. When people looked up at the starry sky in those prehistoric times, they noticed a ghostly strip of light arcing across the skies from horizon to horizon. With the changing of the seasons, this lovely arc of light travelled across the sky. Even the most casual observers of the sky may see that portions of the band are hidden by what we now know to be massive dust clouds.
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A spring has a force of 2.0N and an extension of 0.30m. What will the extension be if the force applied is 6 N.
Will mark as brainliest
Answer:
0.9 m
Explanation:
Hooke’s Law
[tex]\large\boxed{F = ke}[/tex]
where:
F is the force in newtons (N).k is the 'spring constant' in newtons per metre (N/m).e is the extension in metres (m).Given values:
F = 2.0 Ne = 0.30 mSubstitute the given values into the formula to find k:
[tex]\implies 2.0=0.30k[/tex]
[tex]\implies k=\dfrac{2.0}{0.30}[/tex]
[tex]\implies k=\dfrac{20}{3}\; \sf N/m[/tex]
To find the extension if the force applied is 6 N, substitute the found value of k and the given value of F into the formula and solve for e:
[tex]\implies 6=\dfrac{20}{3}e[/tex]
[tex]\implies 18=20e[/tex]
[tex]\implies e=\dfrac{18}{20}[/tex]
[tex]\implies e=0.9\; \sf m[/tex]
been working on this, anyone know?
To launch a 60 kg human at the given speed, the spring constant needed is 1500 N/m.
What is spring constant?This is the proportion of a spring's extension to the force applied to it. Utilizing the energy conservation principle, the spring's spring constant is determined. The human will transform the elastic potential energy of the spring into kinetic energy in order to launch at the desired speed.
Briefing:U = K.E
¹/₂kx² = ¹/₂mv²
k = mv²/x²
where;
m is mass of the human
v is the speed of the cannon
x is the extension of the spring
k is the spring constant
Substitute the given parameters and solve for the spring constant.
k = (60x 15²) / (3²)
k = 1500 N/m
A spring constant of 1500 N/m is need to maintain the law of conservation of energy, from elastic potential energy of the spring to kinetic energy of the human,
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The complete question is -
In order To launch a 60 kg human so that he leaves a cannon moving at a speed of 15 m/s, you need a spring with an appropriate spring constant. This spring will be compressed 3.0 m from its natural length to launch the person. The cannon oriented at an angle of 37⁰ above the horizontal?
a) Which spring constant should the spring have so that the cannon functions as desired?
Describe how the motions of the particles that make up an object change when the object's
temperature increases.
Answer:
faster
Explanation:
With an increase in temperature, the particles gain kinetic energy and move faster. The actual average speed of the particles depends on their mass as well as the temperature – heavier particles move more slowly than lighter ones at the same temperature
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electromagnetic radiation with a wavelength of 745 nm appears as red light to the human eye. the energy of one photon of this light is 2.67 × 10-19 j. thus, a laser that emits 1.3 ×10-2 j of energy in a pulse of light at this wavelength produces photons in each pulse. electromagnetic radiation with a wavelength of 745 nm appears as red light to the human eye. the energy of one photon of this light is 2.67 × 10-19 j. thus, a laser that emits 1.3 ×10-2 j of energy in a pulse of light at this wavelength produces photons in each pulse. 3.6 × 1019 6.5 × 1013 4.9 ×1016 4.7 × 10-24 2.1 × 10-17
Photons are massless.
What is electromagnetic radiation?
Electromagnetic radiation consists of electromagnetic field-propagating waves that carry electromagnetic radiant energy. Radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays are included. All of these electromagnetic waves comprise the electromagnetic spectrum.
Given that:
E= Energy
h= Plank's constant = 6.6*10^-34 Js
c= speed of light = 3*10^8 m/s
E=hv = hc/λ
λ=745 nm = 745*10^-9 m
E=6.6*10^-34 * 3*10^8/745*10^-9
E= 2.657* 10^19 = 2.66* 10^19 J
hence, the energy of one photon of this light is 2.66* 10^19 J
To learns more about electromagnetic radiation the link is given below:
https://brainly.com/question/18650093?
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Correct question:
Electromagnetic radiation with a wavelength of 745 nm appears as a red light to the human eye. The energy of one photon of this light is............... A) 2.67 x 10-28 B) 2.67 x 10-19 C) 1.48 x 10-22 D)1.48 × 10-31 E) 3.75 × 1018
