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A crate of weight W is being pushed across a horizontal surface by a force directed at an angle of 20° below the horizontal. What is the magnitude of the normal force on the crate?
a. It is less than W.
b. It equals W.
c. It is more than W.
d. None of the above since the coefficient of kinetic friction is not given.
Please explain how you'd get the answer.
An image of the moon is focused onto a screen using a converging lens of focal length f= 36.3 cm. What is the diameter of the moon's image
A 65 g bullet is fired from a rifle having a barrel 0.560 m long. Assuming the origin is placed where the bullet begins to move, Determine the work done by the gas on the bullet as the bullet travels the length of the barrel
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A weightlifter bench-presses a 130.0 kg barbell from his chest to a height equal the length of his arms 0.850 m. How much work does he do? What is the potential energy of the barbell relative to the weightlifter\'s chest after he lifts the barbell
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Describe the relationship between electron orbital energy levels and the energy of light that electrons emit for atoms in a gas.
What is the electric potential 3.0×10^?11 from a proton (charge +e)? Let V=0 at r=infinity. What is the potential energy of an electron at this point
Find the magnitude of the acceleration of the masses. Find the magnitude of the tension in the string. If the track has length L = 3.78 m, find Vf, the speed of the cart just before it hits the barrier.
A 5.29-kg ball hangs from the top of a vertical pole by a 2.09-m-long string. Calculate the angle, between 0° and 90°, that the string makes with the pole
A reinforced concrete column 400mm by 400mm and 3.5m high is subjected to a load 160kN. The column shortens by 0.07mm. What is the strain in the column
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