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Concrete has a specific heat capacity of 670 joules/kg-0 C. A 2 kg concrete block, that has a temp of 20 degrees Celsius, is dropped from a height of 100 meters. What is its temp after it hits the ground if it lost no heat to the surrounding environment?
Secondly, if the block is raised back to 100 meters without gaining or losing heat from the environment, What is the blocks temp after it was raised?
What is the crankshaft's angular acceleration, How many revolutions does it make while reaching 3600{\rm rpm}
When the cannon is fired, the ball moves 15.3 cm through the horizontal barrel of the cannon, and there is a constant frictional force of 0.0322 N between the barrel and the ball. Illustrate at what point does it have its max speed?
A gardener feels it is taking him excessively long to water a garden with a 0.952cm diameter hose. By what factor will his time be shortened, if he uses a 1.58 cm diameter hose.
A solid disk of radius 9.20cm and mass 1.15kg , which is rolling at a speed of 2.30m/s , begins rolling without slipping up a 12.0? slope
If no, then what will happen if 30 kilocalories of heat is added to the water? Give a numerical result as part of your answer.
To hoist himself into a tree, a 72.0-kg man ties one end of a nylon rope around his waist and throws the other end over a branch of the tree. determine the man's upward acceleration
A 0.14-kg balloon is filled with helium (density = 0.179 kg/m3). If the balloon is a sphere with a radius of 5.3 m, what is the maximum weight it can lift
A woman is riding a Jet Ski at a speed of 28.8 m/s and notices a seawall straight ahead, what is the minimum distance from the seawall that she can begin making her turn and still avoid a crash
An injured monkey sits perched on a tree branch 3.0 m above the ground, while a wildlife veterinarian is kneeling down in the bushes 88.5 m away attempting to subdue the monkey with a tranquilizer gun.
Calculate the rest energy of an electron in joules and Calculate the rest energy of an electron in MeV (1MeV=1.60×10?13J)
a person who weighs 800 N is squatting on a scale. Suddenly he stars jumping, extending his legs as quickly as possible, so that he can ump into the air. as the person is in the process of jumping (accelerating upward) the reading of the scale is ..
there are 4 charges located on the corners of a square of side d. q1(top left = +1q) q2(top right= -1q), compute the electric potential at the center of the square
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