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The attractive force between proton and an electron due to gravity is Gmpme/ r2 , where me =0.9x10-30 kg, mp = 1.67x10-27 kg, and G =6.67x10-11 m3 /kg.s2 . What is the lowest gravitational Bohrradius?
a space probe journeys at a constant velocity from earth to tau ceti a distance of 11.5 y in a time of 1.4 y as
A child suddenly runs into the street. If it takes the driver 0.80 s to react and apply the brakes, explain how many meters will the car have moved before it begins to slow down?
A certain camera has f-numbers that range from 1 to 20. If the focal length of the lens is 51 mm, what is the range of aperture diameters for the camera
A 0.04-kg baseball traveling in a horizontal direction with a speed of 16 m/s hits a bat and is popped straight up with a speed of 15 m/s. What is the change in momentum (magnitude and direction) of the baseball?
An isolated capacitor of unknown capacitance has been charged to a potential difference of 100V. Calculate the unknown capacitance
An air-track glider attached to a spring oscillates with a period of 1.50s . At t=0s the glider is 4.50cm left of the equilibrium position, obtain the phase constant
A black, totally absorbing piece of cardboard of area A= 1.5 cm2 intercepts lightwith an intensity of 2 W/m2from a camera strobe light. What radiation pressure is produced onthe card board
A car is hauling a 88 kg trailer, to whichit is connected by a spring. The spring constant is 2150 N/m. The car accelerates with an acceleration of0.33 m/s2. By how much does thespring stretch?
A 1500-kg car moving east at 28.00m/s collides with a 1720 kg car moving south at 15 m/s and the two cars stick together.
a charged material causes the deflection of a positively charged electroscope to increase. does the charged material
A cannon fires a cannon ball at 999.16 m/s in a straight line that passes directly over an observer's head. how far is the cannon from the observer
A wooden block with equal sides of 4 cm is floating in water. If the density of the block is half the density of water, how far is it from the water to the top of the block?
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