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Assume that a spacecraft lands on an asteroid and bores a hole perpendicular to its surface; it is noticed that the sun shines straight down to the bottom of the hole. Another hole is bored 10 miles "north' of the first hole at the same time, but it is noticed that the Sun makes a 20 degree angle to rod placed into that hole - what is the circumference and radius of that asteroid?
A child is trying to throw a ball over a fence. She gives the ball an initial speed of 8.0 m/s at an angle of 40° above the horizontal. How far is the child from the fence
A hoop and a disk, both of 0.36- m radius and 4.0- kg mass, are released from the top of an inclined plane 3.1 m high and 8.9 m long. What is the speed of the disk
A car is travelling at 24 m/s while the driver spots a large pothole in the road a distance 35 m ahead. She immediately applies her brakes. If her acceleration is -4.30m/s2, does she manage to stop before reaching pothole? What is the stopping dis..
An audio amplifier delivers to the speaker alternating voltage at audio frequencies. what is the time-averaged power transferred to it
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".
A cylindrical hoop and a spherical shell both roll without slipping and both have identical masses (6 kg) and identical radii (0.2 m). What is the velocity of each at the bottom of the hill
Two cylinders, made from the same material and having the same length, have radii r1 and r2 with r1 > r2. Find the final angular velocity of the smaller cylinder
what is the smallest value d can have before the string breaks?
A shotgun fires a large number of pellets upward, with some pellets traveling very nearly vertically and others as much as 1.0o from the vertical. suppose that the initial speed of the pellets is uniformly 150ms-1 and ignore air resistance.
A rechargeable battery that is completely drained of electrical energy can be completely charged by applying 6.0 mA of current for 1.0 h. how much energy is the battery capable of storing
A hot wheels track has a spring loaded launcher. A 100g car is pushed into the launcher, which compresses the spring by 2cm. The cars initial velocity after launching is 3m/s.
A member of the volleyball team spikes the ball. During this process, she changes the velocity of the ball from 3.5 m/s, determine the mass of the volleyball
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