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The gravitational for on the moon due to the earth is only about half the force on the moon due to the sun. whyisn't the moon pulled away from the earth? Explain?
A centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is usedin medical laboratories, for instance, to cause the more dense redblood cells to settle through the less dense bloo..
A 5 gram bullet moving with an initial speed of 400m/s is firedinto and passes through a 1 Kg block. The block, initially atrest on a frictionless, horizontal surface, is connected to aspring with k = 900 N/m. If the block moves a distance of 5cm ..
In a simple atom, the electrons making transitions between outermost energy levels and the innermost energy levels give rise to photons with the reddest colours.
Professional baseball pitchers can deliver a pitch which can reach the blazing speed of 100 mph (miles per hour). how much kinetic energy does the ball have
A 0.15g honeybee acquires a charge of 21pCwhile flying, What is the ratio of the electric force on the bee tot he bee's weight and What electric field strength and direction would allow the bee to hang suspended in the air
q1. a mass-spring system oscillates on a horizontal frictionless surface with amplitude of 3.89 cm. if the spring
Two equally charged insulating balls each weigh 0.26 g and hang from a common point by identical threads 25 cm long. find the magnitude of the charge on each ball
A helicopter lifts a 70 kg astronaut 16 m vertically from the ocean by means of a cable. The acceleration of the astronaut is g/10. How much work is done on the astronaut by her weight? What is the speed of the astronaut just before she reaches the ..
A boy shoots a BB gun horizontally at a target 15 m away. The gun is aimed directly at the center of the target, but the small metal BB hits 56 cm lower. avoid any air resistance, what was the initial speed of the BB.
suppose one pendulum consists of a 1-meter string with a bob that is an aluminum sphere 2 inches in diameter. a second
Two automobiles are equipped with the same single-frequency horn.When one is at rest and the other is moving toward an observer at15.6 m/s, a beat frequency of 5.52 Hz is heard. What is thefrequency the horns emit? Assume T = 20°C .
The bottom of a swimming pool looks to be 1.5 m below the surface. Find the pool's actual depth
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