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The distance to the moon can be found with the help of mirrors left on the moon by astronauts. A pulse of light is sent to the moon and returns to earth in 2.562 s. Using the measured value of the speed of light to the same precision, calculate the distance from the earth to the moon.
A fish at a depth of 30 m is neutrally buoyant, What fraction of the original number of air molecules that were in the air bladder remains when the fish is at the surface
A gas with initial conditions (P,V,T)i expands isothermally until the final volume=8.192 times the initial volume, find the ratio of the final pressure to the intial pressure
A space vehicle is travelling at 5800 km/h relative to the Earth when the exhausted rocket motor is disengaged and sent backward with a speed of 74km/h relative to the command module. The mass of the motor is four times the mass of the module. What i..
A proton accelerates from rest in a uniform electric field of 675 N/C. At some later time, its speed is 1.35 106 m/s. (a) Find the magnitude of the acceleration of the proton.
An 81.7-g arrow is fired from a bow whose string exerts an average force of 121 N on the arrow over a distance of 78.4 cm
A laser beam is incident on a 45°-45°-90° prism perpendicular to one of its faces, Find the index of refraction of the prism
A light wave has a 660nm wavelength in air. Its wavelength in a transparent solid is 440nm. What is the speed of light in this solid
q1. in a head-on collision a car stops in 0.27 from a speed of 12. the driver has a mass of 76 and is fortunately
The red block in the %u201CSame Volume%u201D floats in water. what volume of the blue block would float above the water line if the blue block was placed on top of the red block in the water
A +6.00-µC charge is moving with a speed of 8.80 104 m/s parallel to a very long, straight wire. Find the magnitude and direction of the force on the charge
A daring 51kg swimmer dives off a cliff with a running horizontal leap, What must her minimum speed be just as she leaves the top of the cliff so that she will miss the ledge at the bottom
q1. a 20 g rifle bullet travelling 215 ms buries itself in a 3.7 kg pendulum hanging on a 2.8 m long string which makes
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