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Q. One cubic centimeter of a cumulus contains 250 water drops, which have a typical radius of 10 μm. (a) How various cubic meters of water are in a cylindrical cumulus cloud of height 3.0 km and radius 1.1km? (b) How various 1-liter pop bottles would that water fill? (c) Water has a density of 1000 kg/m3. How much mass does the water in the cloud have?
Q. A person of mass 72 stands at the center of a rotating merry-go-round platform of radius 3.40 and moment of inertia 950. The platform rotates without friction with the angular velocity 0.95. The person walks radially to the edge of the platform.
How does the decrease in gravitational potential energy of a falling ball compare to its increase in kinetic energy.
The coefficient of kinetic friction for wood sliding on wood is 0.20. What is the final speed of the bullet
How to compute Average power output
Suppose that the mass of the dishwater is large as much as necessary so that its temperature does not change appreciably.
A number of people are riding in a hot-air balloon. The combined mass of the people and balloon is 281 kg. The balloon is motionless in the air, since the downward-acting weight of the people and balloon is balanced by an upward-acting 'buoyant' f..
A robot probe drops a camera off the rim of the 389 m high cliff on Mars, where the free fall acceleration is 3.7 m/s^2. Find out velocity with which it hits the ground and the time required for it to reach the ground.
Assume the freezer operates for 5 hours each day, how much power does it require while operating
A ballplayer catches a ball 2.75 seconds after throwing it vertically upward. With what speed did he throw it? Calculate the final & resultant velocity and acceleration.
What range is appropriate
Needing help, secretary of the United States Department of Agriculture asked your teacher, "If a chicken and a half can lay an egg and a half in a day and a half, how many days will it takes three chickens to lay twenty eggs".
How long does it take for the grinding wheel to stop ? Through how many radians has the wheel turned during the interval found in.
A rifle with a barrel length of 58 fires an 11 bullet with a horizontal speed of 370. The bullet strikes a block of wood and penetrates to a depth of 15.
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