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A rock is dropped off the side of a bridge and hits the waterbelow 2s later.
a) What was the rock's velocity when it hit thewater?
b) What was the rock's average velocity as itfell?
c) What is the height of the bridge abovethe water?
An object of mass 3.02 kg, moving with an initial velocity of 4.95 J m/s, collides with and sticks to an object of mass 2.67 kg, Find the final velocity of the composite object
In a local bar, a customer slides an empty beer mug down the counter for a refill. The height of the counter is 1.30 m, What was the direction of the mug's velocity just before it hit the floor
What is the frequency of string that was tightened.How high does it rise above the ground.
A Molecule of DNA is 2.17 um long. The ends of the molecule become strongly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 0.78% upon becoming charged. Determine the effective spring con..
Measuring the Speed of Sound. A student investigator is measuring the speed of sound by looking at the time for a brief, sinusoidal pulse from a loudspeaker to travel down a tube, What was the approximate length of the tube
n = 4.64 mol of Hydrogen gas is initially at T = 343 K temperature and pi = 2.01×105 Pa pressure. How much work did the external force perform
Using a 695-nm wavelength laser, you form the diffraction pattern of a 0.103-mm wide slit on a screen. How far is the screen located from the slit
Two particles having charges of 0.520 nC and 18.7 nC are separated by a distance of 1.10 m, Where would the net electric field be zero if one of the charges were negative
A cube of ice is taken from the freezer at -9.5°C and placed in a 105 g aluminum calorimeter filled with 323 g of water at room temperature of 20°C. What was the mass of the ice cube
A laser with wavelength d/8 is shining light on a double slit with slit separation 0.400mm. What is the wavelength %u03BB2 of the second laser
A projectile is fired at such an angle from the horizontal that vertical component of its velocity is 49 m/s. The horizontal component of its velocity is 61 m/s.
A canoe has a velocity of 0.54 m/s southeast relative to the earth. The canoe is on a river that is flowing 0.58 m/s east relative to the earth. Find the direction of the velocity of the canoe relative to the river
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