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(a) If the stretch of a spring is doubled, the force it exerts is also doubled. By what factor does the spring’s potential energy increase? Support your answer.(b) Two bullets are fired at the same time with the same kinetic energy. If one bullet has twice the mass of the other, which bullet has the greater speed and by what factor? Which can do the most work? Explain your answers.
A physicist\'s left eye is myopic (i.e., nearsighted). This eye can see clearly only out to a distance of 21 cm. what is the power in Diopters
A single photogate is programed to start a timer when it is blocked and stop the timer when it is unblocked. What is the speed of the sphere
An electron ( charge = -1.6 e^-19 C ) is moving at 3.0 e + 5 m/s in the positive X direction. A magnetic field of 0.8 T is in the positive Z direction. Find the magnetic force on the electron
question1two gerbils run in place with a linear speed of 0.60 on an exercise wheel that is twisted like a hoop. find
A lunar lander is making its descent to Moon Base I. The lander descends slowly under the retro-thrust of its descent engine. What is the speed of the lander
An electron initially at rest recoils after a head-on collision with a 5.94-keV photon. Determine the kinetic energy acquired by the electron
A certain automobile engine delivers 2.39 104 W (32.0 hp) to its wheels when moving at a constant speed of 25.0 m/s ( 56 mi/h). What is the resistive force acting on the automobile
The distance from the point on the surface of Earth to a point on a surface of the moon is measured by aiming a laser light beam at the reflector on the surface of moon and measuring the time required for the light to make a round trip.
A shell of mass m and speed v explodes into two identical fragments. If the shell was moving horizontally (the positive x direction) with respect to Earth, and one of the fragments is subsequently moving vertically with speed v, find out the velocity..
A woman on a bridge 81.0 m high sees a raft floating at a constant speed on the river below. Find the speed of the raft
A standing wave is created on a string of length 1.0 m and fixed at both ends. What is the wavelength of the third harmonic
when it falls back it hits the ground with speed v1=50m/s. The mass of the ball is m=20g. Illustrate what is the total work done by the drag force while the ball is in the air?
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