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A submarine on the ocean surface receives a sonar echo indicating an underwater object. The echo comes back at an angle of 20 above the horizontal and the echo took 3.04s to get back to the submarine. What is the object's depth?
a 0.5 kg block of aluminum is heated to 200 degrees C. The block is then quickly placed in an air insulated tub of cold water at 0 degrees C and sealed. compute the final temperature of the water and block
A uniform 1.3 kg rod that is 0.8 m long is suspended at rest from ceiling by two springs, one at each end of the rod. Both springs hang straight down from the ceiling.
After the skier on the hill had been moving for 5.0 s, friction of the snow suddenly increasedmaking the net force on the skier zero. what is new coefficient of friction? how fast would the skier now be going after skiing for 5.0s.
An isolated conductor of arbitrary shape has a net charge of +1.30×10-5 C. Inside the conductor is a cavity within which is a point charge q = +3.25×10-6 C. What is the charge on the cavity wall
Find out a magnitude and direction of the electric field
A 13g bullet traveling 223m/s penetrates a 2kg block of wood and emerges cleanly at 160 m/s. If the block is stationary on the frictionless surface when hit, how fast (m/s) does it move after the bullet emerges.
Assume 3 mol of neon (an ideal monatomic gas) at STP is compressed slowly and isothermally to 0.25 the original volume. The gas is then allowed to expand quickly and adiabatically back to its original volume.
A uniform plank of length 4.3m and weight 236N rest horizontally on two supports, with 1.1m of the plank hanging over the right support. To what distance x can person who weighs 450N walk on the overhanging part of the plank before it just begins ..
A map of a burned area obtined from remote sensing contains 120 pixels. The remote sensing image shows that the fire is isolated to 73 of 120 pixels.
Disscus how the conservation of energy law explain whys the temperature of a gas increases when it is quickly compressed, whereas the temperature decreases when the gas expands.
A woman has a mass of 59 kg, What is her weight on earth and What are her mass and her weight on the moon
Determine out the magnitude of the average force that the water exerts on the diver. This force is neoconservative.
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