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A race vehicle driver must average 204.0 km/hover the course of a time trial lasting ten laps. If the first nine laps were done at 198.0 km/h, find what average speed must be maintained for the last lap? (Answer to the nearest km/h.) km/h
A 20.0kg rock slides on a rough horizontal surface at 5.50 m/s and eventually stops due to friction. What average thermal power (Watts) is produced as the rock stops
Alpha particles are accelerated through a potential difference of 1500 volts and then enter a magnetic field 0.4T perpendicular to their direction of motion. Calculate the radius of the circular path that they traverse. An alpha particle has mass 6.6..
A person in a kayak starts paddling, and it accelerates from 0 to 0.8 miles/hour in a distance of 0.8 km. If the combined mass of the person and the kayak is 80 kg, what is the magnitude of the net force acting on the kayak
A concave spherical mirror with a focal length of 15cm forms an upright image that is 5 times larger than the original object
A standing observer perceives a train whistle to have a frequency of 300 Hz. what is the frequency of the sound waves emitted from the train
A 600X microscope uses a 0.35 cm focal lengthobjective lens. if the tube length is 16.0 cm, what is the focal length of the eyepiece
a bear awakening from winter hibernation staggers directly northeast for 15 m and then due east for 15 m. show each
A 1600 kg car moves down a level highway under the actions of two forces. find the speed of the car after it has moved a distance of 30 m, assuming it starts from rest
Water flows through a pipe. The radius of the pipe in the narrow part is .2m and the radius of the pipe in the wider part is .4m. find the velocity of water in the wider part
A 7.000 kilogram bowling ball moves at 3.00m/s. Determine how fast must a 2.45 gram Ping Pong ball move so that the two balls have the same kinetic energy
The Hubble Telescope orbits the earth in a near circular orbit of about 585 km above the Earth's surface. find the magnitude of the centripetal acceleration of the satellite
For the motion from the initial free until the piece of wood comes to rest, what is the total amount of work completed by friction.
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