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Your moving car contains a lot of energy as kinetic energy - energy of motion.
If your car is not a hybrid, when you stop by stepping on the brake, your energy of motion is transformed by friction (in the brakes, against the road) into thermal energy. It can't be re-used. Estimate how many gallons of gasoline you could save each time you stopped your car from a speed of 100 km/hr if you could store that energy somehow and re-use it. [Hint: One gallon of gasoline contains about 1.2 x 109 Joules of energy. (1 Joule = 1 kg-m2/s2).] Be sure to clearly state your assumptions and how you came to the numbers you estimated, since grading on this problem will be mostly based on your reasoning, not on your answer.
Assume a convex mirror has a radius of curvature of 14.6 m and that there is a car that is 11.7 m behind the mirror. What is the magnification of the image?
A person is making homemade ice cream. She exerts a force of magnitude 22 N on the free end of the crank handle, and this end moves in a circular path of radius 0.28 m. The force is always applied parallel to the motion of the handle. If the handl..
A rectangular block of ice 14.0 m on each side and 1.4 m thick floats in sea water. The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3.
What is a limiting angle of resolution
Plot the density of helium as a function of temperature from 0 °C to 200 °C and pressures of 50, 100, 150, and 200 kPa (abs).
an airplane must reach a speed of 184 mih to take off. if the runway is 498 m long what is the minimum value of the
consider a solid of molecules where there are two states of lowest energy and one excited state at energy e. at 600k
When a single person shouts at a football game, the loudness of sound at the center of the field is 55 dB. Than all the people shout together, the loudness increases to 106 dB. Suppose that each person is about the similar distance from the center of..
a straightforward method of finding the density of an object is to measure its mass and then measure its volume by submerging it in a graduated cylinder, What is the density of a 220 g rock
Find out a formula for a electrical flux on a sphere for a point charge at the center of the sphere with a hole in the sphere.
The speed of an alpha particle is determined to be 1.55×106 m/s. what is the magnitude of that potential
In a standing wave pattern the distance between the second and the seventh nodes is 5cm. find the wavelength and the speed of the wave
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