The same inverse square law which you were initially introduced to applying to gravity, applies to Light intensity and sound. If a flashlight is moved from 30 cm to 90 cm above the pages of a book compare the illumination on the book before and after the flashlight is moved.

Q: Why is the Diesel cycle more efficient (in thermodynamic terms) than the Otto cycle? a) Because the…

A: Diesel engines have more efficient than the otto cycle .

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Q: Y ºX For the projectile above, what is the acceleration at Point Y?

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A: Given: The temperature is 3000 K.

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Q: A. A fire truck travelling at 22.5 m/s decelerates at 2.25 m/s². a) How long a time does it take for…

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Q: A bunch of keys was thrown directly upward by Macoy, who is looking out of the window, to be caught…

A: As per student's request I am answering parts c. and d. only. Given : Initial velocity (vo) = 3 m/s…

Q: A bunch of keys was thrown directly upward by Macoy, who is looking out of the window, to be caught…

A: Keys move throughout it's motion due the force of gravity. So the only acceleration acting of keys…

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A: Given:- |Va|=620 km/h θa = 305° |Vw|= 80 km/h θw= 260° Lets use polar form of vector representation…

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Q: Two beads are sliding freely on a horizontal rod. Use the following conditions. mA = 3 kg e=0.9 VA=…

A: Solution has been attached in step 2

Q: Last time now, with d = 2.37 m. You start the block on the track at rest, somewhere to the left of x…

A: Given that- d=2.37m You start the block on the track at rest somewhere to the left of x = 0. You…

Q: What is the acceleration produced by a force of 230 N exerted on an object of mass 16 kg.

A: Introduction :  In this question we are provided with value of mass and force . with these data we…

Q: What is the sum of the following vectors? Show your solution A= 3i +5j - 2k B= - 4i + 2j + 3k

A: A→ = 3i^ + 5j^ - 2k^B→ = -4i^ + 2j^ + 3k^

Q: A motorcycle is being driven around a circular vertical wall 115 ft in diameter. What is the lowest…

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Q: Question 20 A certain heat engine draws 500 cal/s from a water bath at 27 °C and transfers 400 cal/s…

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Q: If speed of light is 10m/s. Find length of a meter stick moving with 9m/s. A. 2.3m B. 1.7m C. 44cm…

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A: The answer is: Option (a) from the top plate to the bottom plate.

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Q: A solid silver piece is immersed in water contained in a measuring cylinder. The level of water…

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Q: Find the mass of block.

A: Given data;  Block dimensions=2m×0.5m×0.25mDensity=7.8 g cm-3Find mass of the block ?

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A: Given :  1) speed of euglena =3.5μm/s diameter of petri dish = 8cm

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A: The invariant mass is also known as the rest mass, proper mass, or intrinsic mass.

Q: To make a 0.53 μF capacitor, what area must the plates have if they are to be separated by a 4.0 mm…

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Q: 40. Light strikes a plane mirror at an angle of 30° from the surface of the mirror. The angle of…

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A: Given: Mass m=500 g, Spring constant k=360 N/m, Displacement from the equilibrium x=12 cm=0.12 m.…

Q: In the figure, a 3.9 kg block slides along a track from one level to a higher level after passing…

A: mass = 3.9 kg h = 1.2 m vo = 6.4 m/s μk = 0.639

Q: A rocket is fired vertically with constant acceleration of 120 ft/s2 for 3 min. Its fuel is then…

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Q: (b) For a spring whose equilibrium position is at x = 0 cm, we must apply a force of magnitude 80 N…

A: this question  is about work enery and potential energy.

Q: Q3: - in figure shown below find the power in the cicuits. 1 ΚΩ R₁ Μ R₂ R, 150 Ω ww 500 Ω IV R₁ 450…

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Q: Show work for credit. A 1.2 m wave travels 11.2 m to a wall and back again in 4 s. What is the…

A: Determine the speed of the wave.

Q: Three point charges are arranged as shown below. 0.23 m 0.23 m -15 µC +25 μC -75 μC What are the…

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Q: Instructions 1. Write your complete solution for each item. It should be handwritten. 2. Make sure…

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Q: An artillery shell is fired with an initial velocity of 300m / s at 64 degrees above the horizontal.…

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Speed of light

The speed at which the light travels in a vacuum is unbiased for both the source and inertial frame of reference of the observer. This was postulated by the physicist, Albert Einstein, by observing the theory of electromagnetism of Maxwell. Also, there was no evidence for the luminiferous aether, that is, the medium for the propagation of light where the electromagnetic field exists.