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A ship's mast reaches to a height of 15 meters above the surface of a 10 meter deep lake. When the sun is 30 degrees above the horizon, how long will the shade of the mast be on the bottom of the lake?
The force shown in the attached figure is the net eastward force acting on a ball. The force starts rising at t = 0.012 s, falls back to zero at t = 0.062 s, Find the area of a nearly equally sized triangle
A large balloon of mass 233 kg is filled with helium gas until its volume is 327 m3. Assume the density of air is 1.29 kg/m3, Calculate the buoyant force acting on the balloon
a ball is pushed with an initial velocity of 6 m/s. the ball rolls down a hill with a constant acceleration of 2 m/s^2. what is the balls velocity at the bottom of the hill
A 2.05-kg block is on a plane at 19 degrees with respect to the horizontal. The coefficent of static friction between the block and the plan is 0.80. How many forces are acting on the block
A boy rolls a ball on a level floor 3.5 meter to another boy. If the ball makes 15.0 revolutions, evaluate what is its diameter
A wrecking ball is hanging at rest from a crane when suddenly the cable breaks. Find the time it takes for the ball to fall from rest all the way to the ground
The atmosphere on Mars is almost all carbon dioxide (CO2), and hasa pressure of about 6.9×102 Pa, what is the mass of one cubic meter of the atmosphere
A rubber ball with a radius of 3.2 cm rolls along thehorizontal surface of a table with constant linear speed v. Whenthe ball rolls off the edge of the table, it falls 0.66 m to thefloor below. If the ball completes 0.37 revolution during its fall, w..
On a frictionless horizontal air table, puck A (with mass 0.255 ) is moving toward puck B (with mass 0.369 ), which is initially at rest. After the collision, puck A has velocity 0.115 to the left, and puck B has velocity 0.655 to the right.
In an experiment designed to measure the speed of light, a laser isaimed at a mirror that is 47.0 km due north. A detector is placed139 m due east of the laser. The mirror is to be aligned so that light from the laser refelects into the detector.
A certain radioisotope has a half-life of 11.0 days. What fraction of an initial sample of this isotope remains after 22.7 days
A block of mass 5 kg hangs on a spring. When a second block with an identical mass of 5 kg is tied to the first, the spring stretches an additional ho = 1.5 m. What is the maximum speed attained by the remaining block
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