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A 156 kg coil of sheet steel is 0.80 mm thick and 50 cm wide. How long is the steel in the coil?
A train 450 m long is moving on a straight track with a speed of 82.1 km/h. The engineer applies the brakes at a crossing, and later the last car passes the crossing with a speed of 16.7 km/h. Assuming constant acceleration, determine how long the..
In outer space, far from other objects, block 1 of mass 30 kg is at position m, and block 2 of mass 1350 kg is at position m. What is the (vector) gravitational force acting on block 2 because of block 1? It helps to make a sketch of the situatio..
A ball is thrown vertically at 19.6m/s. Ignoring air resistance, how long will the ball be in the air before returning to its initial height
The tortoise can run with a speed of 0.1 m/s and the hare can run with a speed of 2 m/s. They start their race at the same time, but the hare, feeling confident, stops along the way for a two minute nap, and the tortoise wins by the length of his ..
A 10.0-m long string is moved up and down with simple harmonic motion with a frequency of 33 Hz. Determine the velocity of the wave on the sting
One gallon of gasoline contains 3.1 multiply.gif 107 calories of potential energy that are released during combustion. what is the average force produced by the gasoline
Your projectile launching system is partially jammed. It can only launch objects with an initial vertical velocity of 42.0 m/s, though the horizontal component of the velocity can vary.
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons. How many electrons are there in 4.95 liters of water
The focal length of a relaxed human eye is approximately 1.71 cm, Calculate the focal length of the eye when we focus closely
Suppose a 100m diameter stony (p= 3 g/cm^3) meteroid impacts the Earth with a speed of 20km/s. Assume all kinetic energy goes into the creation of an atmospheric blast wave.
How many moles of gas are in a balloon with a volume of 5.07 liters at a temperature of 298 K and a pressure of 1.11 atm
A rifle with the barrel length of 62cm fires a 12g bullet with a horizontal speed of 380m/s. The bullet strikes a block of wood and penetrates to a depth of 14cm. What resistive force (assumed to be constant) does the wood exert on the bullet? How lo..
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