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A rock is thrown vertically upward from ground level at time t=0. At t=1.5s it passes the top of a tall tower. 1 s later it reaches its maximum height. What is the height of the tower?
A projectile is projected from the origin with a velocity of 25.0 m/s at an angle of 50.0 degrees above the horizontal. What is the time of maximum height of the projectile? A.)2.03 s B.)3.45 s C.)1.95 s D.)2.67 s E.)3.01 s
one mole of an ideal gas at 1 atm and 0 C is compressed isothermally from 50 L to 20 L. During this process, energy is transferred out of gas. What is the change of internal energy for this gas
an electric car accelerates for 12 s by drawing energy from its 400-v battery pack. during this time 1200 c of charge
A cube with side length 1.53m of solid Styrofoam is completely submerged in fresh water such that the top of the Styrofoam block, what is the buoyant force acting upon the Styrofoam block
The Golden Gate Bridge in San Francisco has a main span of length 1.28 km, one of the longest in the world. Imagine that a steel wire with this length and a cross-sectional area of 3.40 10-6 m2 is laid in a straight line on the bridge deck with it..
Bill is farsighted and has a near point located 110 cm from his eyes. what is the closest object that can be seen clearly by Anne when she wears Bill's glasses
Explain how much waork has been done against gravity when the crate is raised a vertical distance of 2.19 m? The coefficient of friction is 0.316.
A star rotates in a circular orbit about the center of its galaxy. The radius of the orbit is 1.5 x 1020 m, and the angular speed of the star is 3.7 x 10-15 rad/s. How long (in years) does it take for the star to make one revolution around the center..
A 5.00 kg block carrying a charge Q=60.0?C is connected to a spring for which k=100N/m (see diagram below). The block lies on a frictionless horizontal track, What is the equilibrium position of the block
Ocean waves pass through two small openings, 21m apart, in a breakwater. You're in a boat 69m from the breakwater and initially midway between the openings, but the water is pretty rough. You row 37m parallel to the breakwater and, for the second tim..
The weight of a block of metal is measured with a scale first in air, then in water. Find the specific gravity of the metal ( the ratio of the density of metal to the density of water). The tension of the block is measured 6.0N in air and 4.0N in wa..
A railroad hopper car has a mass of 50000 kg when empty and contains 50000 kg of coal. How fast does the car travel after all the coal is dumped
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