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Determine the power a car engine contributes to speeding the 1300 kilogram car up to a highway speed of 50.0 mi/h in 14.0 second.
hp?
Cheetahs running at top speed have been reported at an astounding 110 km/h (about 69 mi/h) by observers driving alongside the animals. Imagine trying to measure a cheetah's speed by keeping your vehicle abreast of the animal while also glancing at..
External Work equal to 4 x 10^-7 j is needed to move a -5-nC charge at constant speed to a point at which the potential is -20V. What is the potential at the initial point
An open-pit coal mine consumes 96 hectares of land, down to the depth of 26 m, each year. What volume of earth, in cubic kilometres, is removed in this time.
A sewing machine needle moves with a rapid vibratory motion, rather like SHM, as it sews a seam. What is the maximum needle speed
A hydrogen atom in its first excited state absorbs a photon with an energy of 59.0 eV, What is the kinetic energy of the ejected electron
A 180 g copper bowl contains 185 g of water, both at 20.0°C. A very hot 300 gcopper cylinder is dropped into the water, causing the water toboil, with 4.80 g being converted tosteam. The final temperature of the system is 100°C. Neglectenergy tran..
an 15.0-kg box is released on a 35.0 incline and accelerates down the incline at 0.290m/s^2, Find the friction force impeding its motion
A speedboat starts from rest and accelerates at +2.01 m/s2 for 7.40 s. What is the velocity of the boat at t = 21.8 s
The G string of a guitar which should be 392 Hz is playing flat at 380 Hz. What percentage change in the tension of the wire is required so as to tune the string to 392 Hz
a fan at a rock concert is 35.0m from the stage and at this point the sound intensity level is 108db . sound is
Consider a parallel plate capacitor with an area of 2 cm^2 and a plate separation of 0.02 mm which is charged to a voltage of 2 kV. The work function for the electrons in the plate is 3.8 eV. Compare the electron tunneling current when there is a vac..
what is the absolute magnitude of the force on each charge?
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