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What fraction of the power radiated by the sun is intercepted by the planet Neptune? The radius of Mercury is 2.48 107 m, and its mean distance from the sun is 4.50 1012 m. Assume that the sun radiates uniformly in all directions.
A baseball is hit so that it travels straight upward after being struck by the bat. A fan observes that it takes 2.80 s for the ball to reach its maximum height. (a) Find the ball's initial velocity. m/s upward (b) Find the height it reaches.
A 2.00m -long, 550g rope pulls a 13.0kg block of ice across a horizontal, frictionless surface. The block accelerates at 2.20m/s2 . How much force pulls forward on (a) the ice, (b) the rope?
A car of mass 2100 kg collides with a truck of mass 4500 kg, and just after the collision the car and truck slide along, stuck together. The car's velocity just before the collision was m/s, and truck's velocity just before the collision was m..
Regarding the Earth and a cloud layer 750 m above the Earth as the "plates" of a capacitor, calculate the capacitance. Assume the cloud layer has an area of 1 km2 and that the air between cloud and ground is pure and dry.
A vertical spring (spring constant =165 N/m) is mounted on the floor. A 0.390-kg block is placed on top of the spring, Obtain the frequency (in Hz) of the motion
A 500 g, 3 m uniform thin rod is pivoted at one end and has a mass 500 g attached to its other end. Ignore friction and air resistance. Find the moment of intertia of the physical pendulum
What is the turntables angular speed as the block
An electron beam accelerated through a potential difference of 250V, and passes through a small circular hole, What is the diameter of the hole
define the speed with which the cart reaches positions 3, 2, and 1 (in that order). Neglect friction. Let g = 9.81 m/s2.
How many conduction electrons are there in a 3.50 mm diameter gold wire that is 50.0 cm long
A microphone is moving in air towards a stationary source of sound. The detected frequency is 106 Hz greater than the emitted frequency. What is the speed of sound in the unkown liquid
A 4 m long rope weighing 1.4 N is stretched so that the tension is 10 N. The left end is then made to oscillate vertically at 4 Hz by shaking the rope up, What is the speed of the traveling waves on the rope
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