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One whale says to its friend 75 km away how long will it before the friend hear the speed of a sound+in water is1500 km
Determine the energy of the incident electron. How many coulombs of protons and electrons are in each penny.
A test charge of +2 micro C is placed halfway between a charge of +6 micro C and another +4 micro C sperated by 10cm. what is the magnitude of the force on the test charge
A purple beam is hinged to a wall to hold up a blue sign. The beam has a mass of mb = 6.1 kg and the sign has a mass of ms = 16.6 kg. What is the net force the hinge exerts on the beam
A tenth of a ring of charge has charge density ?. What is the electric field at the center of the ring
the only force acting on a 1.8 kg body as it moves along the positive x axis has an x component fx - 6x n where x is
Bats emit sounds of frequencies around 35.0 kHz and useecholocation to find their prey. If a bat is moving at the speed of12.0 m/s toward an insect at an air temperature of20.0oC. What frequency is heard by the bat from the reflectedsound?
A certain dog whistle operates at 21.6 hz while another brand X operates at an unknown frequency. estimate the operating frequency of brand X
A 83.55kg woman walked a 5k race in 53.33 minutes. How much power did it take to complete the race
consider two spheres with two masses and two charges. at a distance of 119.0 m the ratio of the electric force to the
the filament in an incandescent light bulb is made from tungsten resistivity 5.6 x 10-8 omiddotm. the light bulb is
q1. a wheel 45.0 cm in diameter accelerates uniformly from 206rpm to 340 rpm in 7.0 s. how far will a point on edge of
Suppose 28.5 kg of 87.5°C water is placed in contact with 28.5 kg of 11°C water. What is the change in heat (in J) of the hot water
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