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An archer's bow is drawn at its midpoint until the tension in the string is 0.835 times the force exerted by the archer. What is the angle between the two halves of the string?
Suppose that the net horizontal force is because of rolling friction only and take the free-fall acceleration to be g = 9.80 m/s^2. What is the coefficient of friction for the tire under low pressure.
The length of a rectangualr piece of land is 100 ± 1 m and its width is 50 ± 1 m. What is the perimter of the land
Ball A has a mass of 0.90 kg and moves with an initial speed of 10.60 m/s. It collides with stationary balls B and C, whose centers are on a line vertical to the initial velocity of ball A and that are initially in contact with one-another.
A mass of 0.5 kg is attached to a massless spring with a spring constnt of k = 600 N/m. What was the incident speed of the second mass
Car Circles a Track. The 1,000 kg car is moving at the maximum speed it can without skidding off of the 50 m-radius, what is this maximum speed
A 6.10 g lead bullet traveling at 310 m/s is stopped by a large tree. what is the increase in temperature of the bullet
The distance from the earth to the center of our galaxy is about 23000ly(1yr is 9.47x10^15m), as measured by an earth based observer. how long will it take to make the trip
Liquid nitrogen boils at 77.00 K. Would this experiment needs to be altered if we used water, which boils at 373 K? Why.
Four equal charges of +2.5×10-6 C are placed on the corners of one face of a cube of edge length 15.0 cm. A charge of -2.5×10-6 C is placed at the center of the cube. What is the magnitude of the force on the charge at the center of the cube?
what is the equivalent resistance between points A and B?
a 70.9 kg boy and a 43.2 kg girl both wearing skates face each other at rest on a skating rink the boy pushes the girl
A cement block accidentally falls from rest from the ledge of a 82.4 -m-high building, How much time, at most, does the man have to get out of the way
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