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The Starship Enterprise returns from warp drive to ordinary space with a forward speed of 58 . To the crew's great surprise, a Klingon ship is 120 directly ahead, traveling in the same direction at a mere 30 . Without evasive action, the Enterprise will overtake and collide with the Klingons in just about 4.3 . The Enterprise's computers react instantly to brake the ship. What magnitude acceleration does the Enterprise need to just barely avoid a collision with the Klingon ship? Assume the acceleration is constant.
A lead ball is dropped into a lake from the diving board 30 m above the water. After entering the water, it sinks to the bottom with the constant velocity equal to velocity with which it hit the water. The ball reaches the bottom 10 s after it is ..
The average temperature in Gunnison for the first two months of the year are: 1) January (31 days) 10°F 2) February (28 days) 15° F. What are the total number of degree days for Gunnison over these two months?
explain force with the sensor report. what is the charge of the larger sphere.
The dipole moment of a water molecule in liquid water is 6.2×10-30 C•m, and the effective diameter of the water molecule is 2.8×10-10 m. In an earlier homework problem the effective dipole charge separation for water was calculated as 1.9×10-11 m.
Compute magnitude and direction of magnetic field produced by the moving belt at a point just above its surface .
A shell of mass m and speed v explodes into two identical fragments. If the shell was moving horizontally (the positive x direction) with respect to Earth, and one of the fragments is subsequently moving vertically with speed v, find out the velocity..
An arrow is fired horizontally with a speed of 68. m/s directly at the bulls eye of a target 50 m away. When fired, the arrow is 120-m above the ground. How far short of the target does it strike the ground.
A jogger jogs around a circular track with the diameter of 325 m in 16 minutes. What was the jogger's average speed in m/s.
Calculate the speed of an electron after it accelerates from rest through a potential difference of 160 .
A radio controlled car increases its kinetic energy from 4J to 12J over the distance of 2 m. What was the average net force on the car during this interval.
Assume we have an infinitely long wire carrying a current of 2-A. It is bent into an L-shape extending into positive infinities along the x- and y- axes. Find out the magnitude of the magnetic field at a point P with coordinates (0.3 m, 0.3 m).
What is the magnitude of the apparent weight of an 80-kg astronaut 5200-km from the center of the Earth's Moon in a space vehicle moving at constant velocity.
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