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Determine the heat required to raise the temperature of 8.75 kg of air from -12.0 oC to 23.4 oC. c_air=1010 J/kgC
A stone is thrown horizontally with an initial speed of 7.5m/sfrom the edge of cliff. What is the height of the cliff
A sled, initially at height h is sliding down an incline and then it continues moving on the horizontal plane until it stops. What's the energy required to drag it back up?
An automobile has a mass of 1710 kg and a velocity of 17.2 m/s. It makes a rear-end collision with a stationary car whose mass is 2220 kg. What is the velocity of the two cars just after the collision
At a rock concert, the engineer decides that the music isn't loud enough. He turns up the amplifiers so that the amplitude of the sound, By what percentage does the intensity increase
An electric fan is rotating about a fixed axis with an initial angular velocity of 0.260 rev/s. Find the angular velocity of the fan after time 0.195sec has passed
A 45.0-kg girl is standing on a 144-kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. What is her velocity relative to the surface of ice
A car starts from rest at a stop sign. It accelerates at 2.0 m/s2 for 5.7 seconds, coasts for 2.3 s , and then slows down at a rate of 1.5m/s2 for the next stop sign. How far apart are the stop signs?
If the car is traveling a circle of 461 m, and the length (width) of the road is 14.6 m, what is the vertical height of road at the top of the bank in meters? Hint: find the bank angle of the road first and then use trigonometry to find the height..
A coin is located 22.0 cm to the left of a converging lens (f = 16.0 cm). A second, identical lens is placed to the right of the first lens, such that the image formed by the combination has the same size and orientation as the original coin. Find th..
A body has the weight 12 Newton in air and 10 Newton when it is immersed in fresh water with density 1000 kg/m^3. Calculate the volume of the body and density
A container holds a gas consisting of 3.9 moles of Nitrogen molecules. One in a million of these molecules has lost a single electron. What is the net charge of the gas
1. Draw the associated circuit, and label all branch variables, following the Associated Variable Convention. 2. What is the power into the bulb? 3. What is the power into de battery? 4. How long will the battery last in the circuit
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