Explanation:
At every point in the motion of the pendulum the total mechanical energy is conserved. The sum of the gravitational potential energy and the kinetic energy, at each point of the motion, is a constant, which is the total mechanical energy.
Consider the collision of the two balls in figure 9. 14. Is the magnitude of the impulse delivered to ball 1 greater than, less than or equal to the magnitude of the impulse delivered to ball 2?.
The ball with the greatest ∆v will also have the greatest m×∆v. And if impulse is equal to the momentum change, then the ball with the greatest m×∆v also encounters the greatest impulse.
The critical element is that to change momentum we need to either use more force or growth the period of the identical force. The extra the impulse of force, the extra the trade to momentum of a body projectile, human frame, tennis racket, ball, and so forth.
For a force with a constant importance, we are able to find the importance of the impulse with the aid of multiplying the importance of the pressure by the point that force is exerted. If the pressure is not steady, we simply integrate the pressure characteristic over the set time period.
While one force is extra than every other, the forces are not balanced, they may be unbalanced. Through making use of an unbalanced force, you could change the movement of an item. Unbalanced forces could make an item at relaxation start moving, make a moving item stop, or exchange the course and speed of the item.
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Suppose that Earth's polar ice caps melted and the water returned to the oceans, so that the oceans were deeper by about 31.2 m. What effect would this have on Earth's rotation? Make an estimate of the resulting change in the length of the day. (Concern has been expressed that warming of the atmosphere resulting from industrial pollution could cause the ice caps to melt.) Number i Units
Due to this shift in day length, 0.409 seconds were added. Ocean's atmosphere and depth increased by about 31.2 m as a result of the melting of the polar ice caps and the subsequent return of water.
The oblique angle at which the sun's energy enters the Earth's atmosphere causes it to spread out over a larger area, be less concentrated, and travel a greater distance through the atmosphere before it can be absorbed during , resulting in less intense solar radiation in the polar ice regions than in other parts of the planet. Are known as polar ice.
According to the available information, the oceans were about 15.1 metres (m) deeper, which actually means that the water level rose by 15.1 meters.
As a result, the following formula will be used to calculate the change in the earth's radius: dR=15.6 m
dT = 2TdR/R = 2*24*3600*15.1/6371000 = 0.409s
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What are the similarities and what are the differences between solar thermal and PV?.
Solar thermal and photovoltaic (PV) are two different technologies used to harness energy from the sun. Solar thermal systems use the sun’s rays to heat water or air while PV systems convert sunlight directly into electricity.
Both technologies have similarities and differences, and each can be used in various applications. The most important similarity between solar thermal and photovoltaic systems is that they both use the sun’s energy to produce energy. In both cases, the sun’s rays are converted into usable energy. Solar thermal systems use the sun’s heat to heat water or air, while PV systems use the sun’s light to generate electricity. Both systems are also relatively easy to install and maintain, and require little to no additional energy input.
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a projectile of mass m is fired horizontally from a height h above the level ground and with a speed v. solve for the following in terms of m, h, v, and appropriate constants. the external work done on the projectile while it is in flight the external work done on the projectile-earth system while the projectile is in flight the kinetic energy of the projectile just before it lands the speed of the projectile just before it lands
A projectile of mass m is fired horizontally from a height h above the level ground and with a speed v. solve for the following in terms of m, h, v, and appropriate constants. The work done by the projectile is 'mgh' and its kinetic energy will be [tex]\frac{1}{2} m v^{2} cos^{2}[/tex] θ.
Given,
Mass of the projectile = m
The height at which projectile is given 'h'.
Speed of the projectile is 'v'.
As the projectile is fired horizontally, that is the angle θ = 0 degree.
And 'g' is the acceleration due to gravity.
(a) The work done when the applied force and distance or height (h) are in parallel:
W = Fh (cosθ) .....(1)
Where F is the force exerted by the gravity on the projectile
So, F can be written as, F = mg ....(2)
Putting equation (2) in (1).
We get, W = mgh (cosθ)
Where θ = 0 degree
So, W = mgh (cos[tex]0^{0}[/tex])
W = mgh
This is the work done by the gravity on the projectile when the projectile is in horizontal direction.
(b) To determine kinetic energy of the projectile in horizontal:
Velocity component at x axis will be [tex]v_{x}[/tex] = v cos θ
In general the Kinetic energy of an object moving with mass (m) with a velocity 'v' = [tex]\frac{1}{2}[/tex]m[tex]v^{2}[/tex]
For a projectile it can be written as, K.E = [tex]\frac{1}{2}[/tex] m(v cos θ)^2
Or, K.E = [tex]\frac{1}{2} m v^{2} cos^{2}[/tex]θ
Hence, the work done by the projectile is 'mgh' and its kinetic energy will be [tex]\frac{1}{2} m v^{2} cos^{2}[/tex] θ.
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What is a destructive insect resembling a grasshopper?.
These grasshopper-related insects generate massive swarms that travel across areas. Since the Pharaohs ruled ancient Egypt, plagues of locusts have destroyed societies and continue to cause devastation now.
What exactly is regarded as an insect?Invertebrates (animals without a backbone) have a hard exterior covering called an exoskeleton. The head, thorax, and abdomen make up an insect's three-part body. The majority of mature insects also have wings, and they all have six legs. Insects come in more than a million different varieties.
What kind of bug is most prevalent?Ants are the most common bug in the world, which should not be surprising. There are around 10,000 species of these colonial hymenopterans, with an estimated population size of 10–100 trillion individuals worldwide.
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the two particles are both moving to the right. particle 1 catches up with particle 2 and collides with it. the particles stick together and continue on with velocity v f. which of these statements are true?
For this given case of inelastic collision, statement C is true that is, vf is greater than v2, but less than v1.
What is inelastic collision and how does it explain the situation?According to the conservation of linear momentum, when two or more bodies interact, their combined momentum stays constant. So, the total momentum of the system just prior to the collision and the total momentum immediately following the collision are the same in a system of colliding bodies.
The collision is considered to be perfectly inelastic if the two bodies stick together after colliding and move at the same speed. Inelastic collisions are collisions where the kinetic energy is not preserved.
The collision described in the given question is completely inelastic- Prior to a collision, particle 1 had a higher beginning velocity than particle 2. Following the collision, the speed of particle 1 will decrease as it passes some of its kinetic energy to the colliding particle 2, while the speed of particle 2 will increase as it absorbs some of the kinetic energy of particle 1.Thus, the velocity of both the bodies together (vf) is greater than v2, but less than v1.
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The complete question is:
The two particles are both moving to the right. Particle 1 catches up with particle 2 and collides with it. The particles stick together and continue on with velocity vf. Which of these statements is true?
a. vf= v2
b. vf is less than v2.
c. vf is greater than v2, but less than v1.
d. vf= v1
a student must determine the work done on an object when an external force is exerted on it after it travels a specific distance. an external force f is exerted on an object at position x
After an object has travelled a certain distance, the student must calculate the work that is done on it when an external force is applied to it.
An object at location x = 0 experiences an external force F from a string as it traverses a distance D over a horizontal surface for a period of time . As the thing moves, the force changes so that it becomes less.
The final kinetic energy of the object must have been lower than the work performed on it by the applied force, indicating that another external force must have been involved.
Therefore, the learner must determine the work that is done on an object when an external force is applied after it has moved a particular distance.
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what is the nominal capacitance of a two plate capacitor, with plate size of 1 cm x 1 cm, spacing of 0.4 mm? (using the standard formula for a capacitor, not the code you developed in problem 1).\
The capacitance of the plate is 2.2125 × [tex]10^-^1^2[/tex] F
Given : dimensions of the plate = 1 cm x 1 cm = [tex]10^-^2[/tex] m × [tex]10^-^2[/tex] m
The given separation is 0.4mm
to convert this dimension into m
we get
separation or d = 4 × [tex]10^-^4[/tex] m
let capacitance be represented by c
Formula of capacitance = [tex]\frac{AE_{0} }{d}[/tex]
here A = = [tex]10^-^2[/tex] m × [tex]10^-^2[/tex] m = [tex]10^-^4[/tex] m²
And E₀ = 8.85 × 10^-12 F
and d = 4 × [tex]10^-^4[/tex] m
On substituting these values in the formula we get
C = [tex]10^-^4[/tex] × 8.85 × 10^-12/ 4 × [tex]10^-^4[/tex]
C = 2.2125 × [tex]10^-^1^2[/tex] F
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on a frictionless, horizontal air table, puck aa (with mass 0.200 kgkg) is moving toward puck bb (with mass 0.400 kgkg), which is initially at rest. after the collision, puck aa has a velocity of 0.120 m/sm/s to the left, and puck bb has a velocity of 0.650 m/sm/s to the right.
The change in total kinetic energy of the system that occurs during the collision is 0.05 J.
Given that, m₁ = 0.200 kg
m₂ = 0.400 kg
u₁ = ?
u₂ = 0
v₁ = 0.120 m/s
v₂ = 0.650 m/s
According to the law of collision, we have
m₁ u₁ + m₂ u₂ = m₁ v₁ + m₂ v₂
Substituting the given data in the above equation, we have
m₁ u₁ = m₁ v₁ + m₂ v₂ - m₂ u₂
m₁ u₁ = 0.2* (-0.12) + 0.4* 0.65 - 0.4* 0
0.2* u₁ = -0.024 + 0.26
u₁ = 1.18 m/s
Change in kinetic energy = Kinetic energy before collision - Kinetic energy after collision
= -1/2 (0.2) 0.12² - 1/2 (0.4) 0.65² + 1/2 (0.2) 1.18² = -0.00144 - 0.0845 + 0.1392 = 0.05326 J
Thus, the change in kinetic energy is 0.05 J.
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which of the following wireless standards can transmit data at 1300 mbps (megabits per second) or 162.5 mbps (megabytes per second)? 802.11g 802.11ac 802.11n 802.11b
802.11 ac can transmit data at 1300 mbps (megabits per second) or 162.5 mbps (megabytes per second).
What is 802.11 ac wireless standard?You may have noted that the time between 802.11n and 802.11ac was six years. In terms of technology, this is an aeon, and the main advantage that 802.11ac has benefited from is speed.
WiFi is frequently advertised at "theoretical" rates; according to this standard, 802.11ac can do 1300 Mbps, which is the equivalent of 162.5 MB/s (MBps). This is three times quicker than the normal 802.11n speed of 450Mbps.
These speeds are the issue. The fastest 802.11ac real world speeds reported in testing are roughly 720Mbps. In the real world, no one ever achieves theoretical speeds (90MBps). While 802.11n has a peak speed of roughly 240Mbps (30MBps), the 3x estimate is still accurate.
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Calculate the change in decibel ( Δβ2 , Δβ4 , and Δβ8 ) correponding to m=2 , m=4 , and m=8
The change in decibel will be 3 dB , 6 dB, 9 dB.
What is a decibel?
One-tenth of bel is equivalent to one decibel, which is a relative unit of measurement. It uses a logarithmic scale to express the ratio of two values of a power or root-power quantity. The power ratio of two signals with a one-decibel difference in levels is 101/10, or 10120 for the root-power ratio.
decibel (dB), a unit for expressing the ratio between two physical quantities, usually amounts of acoustic or electric power, or for measuring the relative loudness of sounds.
The decibel is a just logarithmic scale
Δβ2 = 10 * log(2) = 3dB
Δβ4 = 10 * log(4) = 6dB
Δβ8 = 10 * log(8) = 9dB
3 dB , 6 dB, 9 dB
Hence, the answer is 3 dB, 6 dB, and 9 dB.
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A small transport ship is travelling in the galactic northwest direction when it collides and lodges itself into a Star Destroyer ship that is 10,000 times more massive. Both are traveling with the same speed but the Destroyer is traveling the galactic east direction. Which of the following statements are necessarily true regarding the motion of the two after the collision? The Destroyer slows down. The Destroyer speeds up. The Destroyer could be traveling in the northwest direction. The Destroyer would still be traveling due east. The Destroyer would have some component of its velocity in the southern direction. The Destroyer would have some component of its velocity in the northern direction.
The true statement is the Destroyer would have some component of its velocity in the southern direction.
What is direction?Relative terminology that compare the position of one item to another can be used to express direction, such as up, down, in, out, left, right, forward, backward, or sideways. The four cardinal directions, north, south, east, and west, can also be used to represent direction. the line that something lies, faces, moves, etc. with reference to the place or region toward which it is directed: the act or instance of directing Northward movement was made by the storm. the actual region or point: The north is the direction. The velocity vector's direction of orientation indicates the motion's direction. To apply your example of a bullet thrown straight up, the velocity vector will seem as follows because only its height, z, is changing: v= (0,0,dzdt).
How you should calculate direction and its rule?To find the direction of the vector v = (x, y), use the formula = arctan(y/x), where is the lowest angle the vector makes with the horizontal axis and x and y are its two constituents.
The direction of magnetic field lines surrounding a current-carrying conductor can be found using Maxwell's Right-Hand Thumb Rule. It says that if the thumb of the right hand represents the direction of current flow, the remaining curled fingers determine the direction of the magnetic field around it.
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g what is the average intensity of an electromagnetic wave with a peak magnetic field strength of ?
The average intensity of an electromagnetic wave with a peak magnetic field strength of B is I = cB^2/2µo
Define the intensity of an EM wave?
The energy that crosses per second per unit area perpendicular to the electromagnetic wave's direction is what is referred to as the wave's intensity.
Any wave's energy is proportional to its amplitude squared. Thus, the intensity of electromagnetic waves can be written as
I = cε0E^2/2
where
I represents the average intensity of the EM wave in W/m^2.
E represents the strongest possible electric field created by a continuous sinusoidal wave
c is the speed of light
ε0 is the permitivitty of free space
If B is the strongest possible magnetic field and µo is the permeability of free space, then the average intensity of an electromagnetic wave, I, can also be represented in terms of the strength of the magnetic field using the relationships
B = E/c, and
ε0 = 1/µo c^2
The highest magnetic field strength B can also be used to express this as,
I = cB^2/2µo
Hence, the average intensity of an electromagnetic wave with a peak magnetic field strength of B is I = cB^2/2µo
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if a person were traveling at 1/2 the speed of light, how long would it take them to travel a light-year from their own point of view?
It would take a human little more than 22 years to cross the same distance if they could move at half the speed of light.
How much time does light need to traverse one second?The speed of light is 300,000 kilometres (186,000 mi) per second. In other words, light covers the same distance in a single second as it would take you to circle the Earth 7.5 times! About one light second separates you from the moon.
What happens if you move at a speed that is half that of light?Even time is a relative concept. This led scientists to conclude that the speed of light is constant and unaffected by the observer.
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Find the voltage across the resistor R, and V. for the following values of C: 56.4 nF, 100 nF, 500 nF Save both voltage waveforms and compute the phase difference between the waveforms for each value of C. Explain your results. Did you get the results that you expected? XSC1 Ext Trid R1 67ΚΩ + C1 Vo 56.4nF V1 156Vpk 60Hz 0° L1 125H R2 47ΚΩ
1. phase difference = 45.1318°
2. phase difference = 54.52°
3. phase difference = 62.153°
Case 1: C = 56.4 ₙF
V₁ = [tex]\frac{156}{\sqrt[]{2} }[/tex]
[tex]x_{c}[/tex] = [tex]\frac{1}{2\pi fc}[/tex]
[tex]x_{c}[/tex] = [tex]\frac{1}{2\pi * 60*56.4*10^{-9} }[/tex]
[tex]x_{c}[/tex] = 47.031 KΩ
here, [tex]V_{0} = V_{A}[/tex]
[tex]X_{L}[/tex] = 2πfL
[tex]X_{L}[/tex] = 2π x 60 x 125
[tex]X_{L}[/tex] = 94.247 KΩ
Apply KCV of node "A"
[tex]\frac{V_{A}-0 }{-jX_{c} +jX_{L}+R_{2} }[/tex] + [tex]\frac{V_{A} -V_{1} }{R_{1} }[/tex] = 0
[tex]V_{A}[/tex] ( [tex]\frac{1}{R_{2} +j(X_{L} -X_{C} )} + \frac{1}{R}[/tex] ) = [tex]\frac{V_{1} }{R_{1} }[/tex]
[tex]V_{A}[/tex] ( [tex]\frac{1}{47 + j(94.247 - 47.031)} + \frac{1}{67}[/tex] = [tex]\frac{156/\sqrt[]{2} }{67}[/tex]
[tex]V_{0} = V_{A} = \frac{84.227}{\sqrt{2} }[/tex]
[tex]V_{A}[/tex] = 84.227 sin (2π x 60t + 22.663) Volts
[tex]V_{R} _{1}[/tex] = [tex]V_{1}[/tex] = [tex]V_{A}[/tex] = [tex]\frac{84.706}{\sqrt{2} }[/tex]
V[tex]R_{1}[/tex] = 84.706 sin [2π x 60t + (-22.498°)] Volts
phase difference = 22.6333 - (-22.498)
phase difference = 45.1318°
Case 2: C = 100ₙF
[tex]X_{C}[/tex] = [tex]\frac{1}{2\pi * 60 * 100 * 10^{-9} }[/tex]
[tex]X_{C}[/tex] = 26.525 Ω
[tex]V_{0}[/tex] = [tex]\frac{156}{\sqrt{2} }[/tex] x [tex]\frac{R_{2} + j (X_{L} - X_{C}) }{R_{1} + R_{2} +j(X_{L} - X_{C} )}[/tex]
[tex]V_{0}[/tex] = [tex]\frac{96.98}{\sqrt{2} }[/tex] [tex]\\ 24.52[/tex]° Volts
[tex]V_{R1}[/tex] = [tex]V_{1}[/tex] - [tex]V_{0}[/tex] = [tex]\frac{78.82}{\sqrt{2} }[/tex] -30° Volts
phase difference = 24.52 - (-30)
phase difference = 54.52°
Case 3: C = 500ₙF
[tex]X_{C[/tex] = 5.305 KΩ
[tex]V_{0}[/tex] = [tex]\frac{156}{\sqrt{2} }[/tex] ([tex]\frac{47 + j 94.247 - j 5.305}{67 + j 94.247 - j 5.305 + 47}[/tex])
[tex]V_{0}[/tex] = [tex]\frac{108.533}{\sqrt{2} }[/tex] (24.186°)
[tex]V_{R1} = V_{1} - V_{0}[/tex] = [tex]\frac{72.28}{\sqrt{2} }[/tex] (-37.967°) Volts
phase difference = 24.186 - (-37.967) Volts
phase difference = 62.153°
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which of the following is not true? (a) wave reflected from a loose boundary will keep its original shape but travelling in an opposite direction.
According to the statement makes it possible to treat reflected light from a mirror.
What term would you choose to describe reflection?The verbs cogitate, deliberate, reason, conjecture, and think are some frequent synonyms for reflect. All of these phrases refer to "using one's faculties of conceptualization, judgment, or inference," but reflect denotes thoughtful reflection on a memory.
How does it imply to reflected things through?unchanging verb. When you reflect, you give something serious thought. We should all allow ourselves space to think. Alternatives: think, evaluate, deliberate, and think. More words for reflect recognizing a people's verbal and nonverbal cues for their feelings and emotions, then expressing (or reflection) those sentiments directly to the user or customer, is known as reflecting feelings.
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What will happen if the mechanics used in a paragraph are incorrect?.
Your authority will be weakened by improper grammar and mechanics. Keep an eye out for recurring grammatical mistakes or other technical errors in your writing, and attempt to fix them by getting feedback.
The term "mechanics" relates to linguistic conventions including capitalization, punctuation, and spelling. To effectively explain your ideas in a paper, you need to be aware of both language and mechanics. Your intended message may be accidentally changed by grammatical mistakes in your writing. Your essay or advertisement's meaning might be altered by a single, recurring grammatical mistake or misspelled word. It speaks of the components of speech and how they work together to generate sentences. Use coordinating conjunctions and punctuation to prevent run-on sentences and comma splices. Mechanics are the laws of written language, such as capitalization, punctuation, and spelling. To prevent sentence fragments, use punctuation and coordinating conjunctions.
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A thin, cylindrical rod = 23.4 cm long with a mass m = 1.20 kg has a ball of diameter d = 10.00 cm and mass M = 2.00 kg attached to one end. The arrangement is originally vertical and stationary, with the ball at the top as shown in the figure below. The combination is free to pivot about the bottom end of the rod after being given a slight nudge.
(a) After the combination rotates through 90 degrees, what is its rotational kinetic energy?
1 J
(b) What is the angular speed of the rod and ball?
2 rad/s
(c) What is the linear speed of the center of mass of the ball?
3 m/s
(d) How does it compare with the speed had the ball fallen freely through the same distance of 28.4 cm?
vswing is 4 ---Select--- greater than less than vfall by 5 %.
a) The rotational kinetic energy after the combination rotates through 90° is 7.868 J
(b) The angular speed of the rod and ball is approximately 8.27 rad/s
(c) The linear speed of the rod and ball is approximately 2.35 m/s
(d) The linear speed of the rod and ball combination is 0.01 m/s faster than the speed of ball free falling from 28.4 cm
What is the angular speed of the rod and ball?The Given:
Length of the cylindrical rod, l = 23.4 cm
Mass of the rod, m = 1.20 kg
Mass of ball, M = 2.00 kg
Diameter of the ball, d = 10.00 cm
The rotational kinetic energy of the ball when it rotates 90° :
The total potential energy of the rod and ball at the top is the rotational kinetic energy of the ball at the bottom
PE( rod)= 0.5 × m× g × l
∴ PE (rod) = 0.5×1.20×9.81×0.27 = 1.58922
PE (ball) = 2×9.81×(0.27 + 0.05) = 6.2784
PE (Total) = 1.58922 J + 6.2784 J ≈ 7.868 J.
KE (rot) = 7.868 J.
KE = [tex]\frac{1}{2} \times I \times \omega^2[/tex]
moment of inertia I = moment of inetia of rod + moment of inetia of Ball
I (rod) = [tex]\frac{m . L^2}{3}[/tex] = [tex]\frac{.234^2 \times1.20 }{3}[/tex] =0.0657
I ball = (⅖ )MR^2 + M (R+L)^2
=[tex]\frac{2}{3} \times 2 \times 0.05^2+2(0.05+0.234)^2[/tex]
=0.0033+0.1613 =0.1646
I = 0.1646 + 0.0657 =0.230 kg·m²
[tex]\frac{1}{2} \times 0.230\times \omega^2[/tex] =7.868
[tex]\omega^{2}[/tex] = 7.868* 2/.230 =68.41
Angular velocity [tex]\omega =\sqrt{68.4}[/tex]
= 8.27 rad per sec
The linear speed, v = ω × r
=8.27*(0.05+.0234) =2.35 m/s
The speed of the ball falling freely from a height of 28.4 cm is given as :
[tex]V^2 = 2gh[/tex]
= 2*9.8*.284= 5.57
v=2.36
The linear speed following the rotation of the combination is approximately 0.01 m/s faster than the speed of the ball in free fall.
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. in three to five complete sentences, explain why the egg sinks in water but floats when salt has been added to the water. remember to use proper grammar and mechanics when writing your sentences.
When submerged in a liquid, objects with a lower density will float. For instance, because the egg has become less dense than salt water, it floats in the latter.
Define liquid and give instances.Liquids lack set shapes but do have defined volumes. Blood, oil, and water are a few examples of liquids. A state of matter known as a liquid has a defined volume but no set shape. Alternatively said, a liquid adopts the shape of its container.
What physical characteristics characterize liquids?The volume retention and conformity to the shape of the container of such a liquid are two of its most visible physical characteristics. When liquid is poured it in to a container, the container's shape is assumed, and as long as the liquid state is maintained, the substance will stay inside the container.
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As a spaceship decreases its distance from the Earth, the gravitational force on the spaceship due the Earth:stays the sameincreasesdecreases
The gravitational field produced by the Sun, Earth, Moon, and other planets extends throughout space. However, the gravitational pull of that distance diminishes.
What is gravitational pull?
The attraction that the earth has on something or that something has on the earth is known as the gravitational pull of a earth. It can be calculated using the object's mass, Earth's mass, the separation between the object's and Earth's centres, and the universal gravitational continuous, a proportionality constant that has been precisely measured. It is 6.674 x 10-11 in size. The weight of an item on the earth's surface is one of the most typical illustrations of this pull.
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why is the maximum difference in potential energy between atoms when placed in a magnetic filed of 3.5 t? you may ignore the magnetic spin.
The maximum difference in potential energy would be [tex]ΔE max =8.12×10 −4 eV[/tex]
What is potential energy?The energy that is held in an object as a result of its position in relation to a zero position is known as potential energy, to put it simply. If an object is placed at a height above (or below) the zero height, it has gravitational potential energy.
Energy that is conserved or stored in a substance or object is known as potential energy. The position, organization, or state of the object or substance determines the amount of stored energy.
It can be pictured as energy with the "potential" to perform labor. The energy will be released when the object's position, configuration, or state changes.
For instance, compressing a spring costs energy. However, what happens to that energy once the spring has been compressed? After all, we are aware that energy can only be changed from one form to another; it cannot be generated or destroyed.
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What is the evidence for dark matter and dark energy?.
The discussion of light and the expansion of Universe are the dark energy and dark matter exist.
A dark matter is a theoretical astronomical thing postulated by the scientist which is believe to take several forms and it is non luminous nature which exist in far space.
Similarly dark energy is the energy that is postulated by the scientist which is believe to be a force that is working against the gravity that almost all the universe and is constantly causing the expansion of the space.
Scientist in studied the nature of light and how the light disorted in the Galaxy clusters computer to a road map that dark matter exist in the universe. The constant expansion of the universe is itself a proof of presence of the dark energy.
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What is the main purpose of scientific model?.
A scientific model's primary goal is to depict empirical things, physical processes, and events in an objective and logical manner, something that is challenging to perceive or comprehend.
Models can aid scientists in explaining their concepts. In many scientific contexts, models are of utmost significance.
Scientists use models to inexpensively and practically duplicate situations or theories. These models assist researchers, gather data to forecast outcomes, test hypotheses, and communicate scientific concepts to non-specialists. As new data is uncovered, scientists frequently update and modify their models. Models are visual aids that assist scientists in communicating complex material when used for presenting ideas or results.
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the sound from one tuning fork can force another to vibrate. what is the analogous effect for light?
The vibrating energy carried from one to another via sound waves. The atoms in the tuning fork vibrate and transfer from one place to another. As a result, the situation is equivalent to analogous effect for light.
What is the analogous effect for light?
Light generated by resonant vibrations of an electron orbiting one atom can be absorbed by an electron in another atom with the same resonant frequency of vibration. In reality, visible "light" is a type of radiation, which is defined as energy that moves in the form of electromagnetic waves. It can alternatively be defined as a continuous flow of particle-like 'wave-packets,' known as photons, that travel at the speed of light (about 300 000 kilometres per second). Light waves emanate from a source. Each wave is composed of two parts: an electric and a magnetic component. That is why light is referred to be Electromagnetic Radiation.
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a 1.8-kg mass attached to a spring oscillates with an amplitude of 9.3 cm and a frequency of 2.8 hz.
The frequency is 5.9 jules.
we have been given that the mass is equal to 2.4 kgs and the amplitude others 9.3 and returned to the power -2 m. Yeah. So he can write The angular frequency is two pi f. That is To buy into 3.8 Hz. That is equal to 23.87. Ready for a 2nd. Now to find the first concert,
we can write Omega Square. Um that is 23.87 reading perspective, but you didn't one second. We square this into 2.4 gauges. That is equal to 1,36, newtons per meter. How to find the total energy we laid half. Okay, A square that is equal to one by two and 21368.26 into 9.3 to 10 to the minus two squared. That is equality 5.9 Jules.
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what is the internal resistance of a 12.0- vv car battery whose terminal voltage drops to 9.0 vv when the starter draws 76 aa ?
The internal resistance of the car battery is 0.0395 Ω. The result is obtained by using the formula to find the electromotive of Volts.
How to find the electromotive of Volts?Electromotive of Volts can be counted by the following formula.
ξ = V + Ir
or
ξ = IR + Ir
Where
ξ = EMF or electromotive force of VoltsV = potential difference terminalI = currentR = load resistancer = internal resistanceWe have:
Potential difference terminal, V = 12.0 VElectromotive force of Volts, ξ = 9.0 VThe current, I = 76 AWhat is the internal resistance? (r = ?)
By using the above formula, we get
ξ = V + Ir
Ir = ξ - V
r = (ξ - V)/I
The internal resistance is
r = (9.0 - 12.0)/76
r = 0.0395 Ω
Hence, the internal resistance of car battery is 0.0395 Ω.
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a 0.6 kg baseball experiences 12 n of force for a duration of 0.1 seconds. what is the change in velocity of the base ball?
The change in the velocity of the baseball is 2 m/s.
Given that,
Mass of the baseball, m = 0.5 kg
Force, F = 10 N
Time duration of force, t = 0.1 s
To find, The change in velocity of the baseball.
Solution,
The impulse imparted by an object is given by :
Impulse is equal to the change in momentum of an object i.e.
(v-u) is the change in velocity of the baseball
(v-u)= 2 m/s
So, the change in velocity of the baseball is 2 m/s.
The pace is the directional speed of an item in movement as an indication of its price of change in role as located from a specific frame of reference and as measured by a specific general of the time.
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What is the definition of amplitude for kids?.
The definition of amplitude is that displacement of the particle from the main position is known as the amplitude.
Suppose that there is a spring which has a block connected to one of its end and the other and is connected to a solid rigid wall.
Now let us say that we give a push to the block.
If ignore the air resistance, then we will observe that, the block will show a to and from movement from the initial position of the spring which is in the middle of the to extreme positions of the spring.
The distance that is covered by the block when it most away or towards the spring is known as the amplitude of the spring block system.
This is how we conclude that the displacement of the particle about its mean position is known as amplitude.
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Are goods that are necessities elastic or inelastic?.
Necessities are inelastic.
Goods that are taken into consideration important have a low elasticity of call for. Strength, fuel, oil, and water are all particularly inelastic because clients depend upon these as requirements in place of luxuries.
An elastic call is one wherein the exchange in the amount demanded because of a change in rate is big. An inelastic call is one in which the alternate quantity demanded because of a change in price is small.
Perfectly inelastic merchandise would be something like air or water, and no person can sincerely restrict that at this factor in time.
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gg the work done on a system by a constant force is the of the component of the force in the of motion times the . hint: check your textbook and the definition of work done by a constant force
The work done on a system by a constant force is the component of force in the motion times the displacement through which the force acts.
Work done is said to be 1 J when a force of 1 N is moved through a displacement 1 m along the direction of force.
The formula for work done is given as W = F × s
where, F is the force
s is the displacement
Force can be written as a product of mass and acceleration i.e, F = m × a
where, m is mass
a is acceleration
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