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The heat produced by the friction between the brake pads and rotors. After the car has stopped, what is the change in temperature of the brake pads and rotors?
Determine the average acceleration in , using a coordinate system with the axis in the direction of the car's original motion and the axis toward the side of the road to which the car skids.
The barrels of the 16- guns (bore diameter = 16 = 41 ) on the World War II battleship U.S.S. Massachusetts were each 15 long. The shells each had a mass of 1350 and were fired with sufficient explo
Calculate the change in electric potential energy of a released electron when is moves vertically upward through a distance d=650m.
A patient is to be injected with 0.5L of an electrolyte solution over half an hour. Assuming that the solution is elevated by 1.0m above the arm and the needle is 2.5cm long, what inner radius shou
When two tuning forks of 131 Hz and 150 Hz, respectively, are sounded simultaneously, how many beats per second are heard?
A box with a mass of 3 kg is lifted (without acceleration) through a height of 9.0 m in order to place it upon the shelf of a closet. What is the increase in potential energy of the box?
A lead bullet with a mass of 0.05 kg traveling at 188 m/s strikes an armor plate and comes to a stop. If all the energy is converted to heat and absorbed by the bullet, what is the temperature chan
The half-lives of 235U and 238U are 7.04 108 yr and 4.47 109 yr, respectively. How long ago did the star(s) explode that released the elements that formed the Earth?
What is the speed of a centrifuge's outer edge, if the centrifuge have a diameter of 1.4 m and 124000 times the force of the earth gravity?
An 79 kg man drops from rest on a diving board -3.1m above the surface of the water and comes to rest .51s after reaching the water. The acceleration due to gravity is 9.81 m/s2. What force does th
Sustained nuclear fusion has yet to be achieved and remains a hope for abundant future energy. Yet the energy that has always sustained us has been the energy of nuclear fusion? Explain
If a magnetic field of 1.5 T, making an angle of 30° with the z-axis, increases to 15.0 T, in 7.0 s, what is the magnitude of the current that will be caused to flow in the conductor?
Find the magnitude of the acceleration of a chair and the magnitude of the normal force acting on the chair: Yusef pushes a chair of mass = 55.0 across a carpeted floor with a force (the subscript
Little Joey (m = 30 kg) is at the top of a waterslide, ready to jump on. The section of the slide between points A and B is essentially frictionless. a. Little Joey sits down and begins to slide. Ho
There would be a north pole at 0 degrees and at 180 degrees and a south pole at 90 degrees and 270 degrees), what would the net magnetic field look like?
A 240g air-track glider is attached to a spring. The glider is pushed in 12cm against the spring, then released. A student with a stopwatch finds that 14 oscillations take 10. What is the spring co
When cars begin to move in a long line of stalled traffic, the motion passes through the line as a wave pulse. (a) What is the direction of motion of the pulse relative to the motion of the cars?
The jump took 2.5 s, and you cleared the canyon with 2 m to spare. If both sides of the canyon are the same altitude, how tall was the ramp?
An object of mass 3.00 kg, moving with an initial velocity of 5.00i m/s, collides with and sticks to an object of mass 2.00 kg with an initial velocity of -3.00j m/s. Find the final velocity of the
Would it be possible to detect on earth sounds produced on another planet if you had a detector sensitive enough to very low-intensity sounds?
In the Relativistic Heavy Ion Collider in Brookhaven, NY, physicists are attempting to recreate the conditions of the Big Bang by colliding extremely massive, highly-charged ions together.
One cubic meter of water flowing over Niagara Falls in New York drops 90.7 meters. If all the energy of the water is converted to heat, how much heat energy would the water have?
Suppose you throw someone a ball, thereby transporting kinetic energy. Could you consider the motion of the ball to be a mechanical wave pulse?
Consider a too-small space station that consists of a 3.6 m radius rotating sphere. A man standing inside is 2 m tall and his feet are at 1 g. What is the acceleration of his head?