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A hare and a tortoise compete in a race over a straight course 2.15 km long. The tortoise crawls at a speed of 0.210 m/s toward the finish line. The hare runs at a speed of 7.55 m/s toward the finish line for 1.720 km and then stops to tease the slow-moving tortoise as the tortoise eventually passes by. The hare waits for a while after the tortoise passes and then runs toward the finish line again at 7.55 m/s. Both the hare and the tortoise cross the finish line at the exact same instant. Assume both animals, when moving, move steadily at their respective speeds.
(a) How far is the tortoise from the finish line when the hare resumes the race?
(b) For how long in time was the hare stationary?
A tank having a volume of 0.100 m3 contains helium gas at 135 atm. How various balloons can the tank blow up if each filled balloon is a sphere 0.300 m in diameter at an absolute pressure of 1.50 atm.
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A spring is hung from the ceiling. A 0.509 -kg block is then attached to the free end of the spring. Find the angular frequency of the block's vibrations
Light from a sodium lamp with a wavelength in a vacuum of 590 nm enters diamond in which the speed of light is 1.24 108 m/s. What is the wavelength of this light in diamond
A 200g block is suspended from a vertical spring, causing the spring to strech by 20 cm, What is the speed of the block when it is 5.0cm above the equilibrium position
Write at least one paragraph in which you define diffraction and interference, discuss Huygens' Principle and explain why light passing through a narrow slit
Two charged dust particles exert a force of 8.5 x10-2 N on each other. What will be the force if they are moved so they are only one-seventh as far apart.
Consider two infinite, parallel, plane sheets of charge separated by a distance L. Each sheet has the same charge density, ?. Label the three zones of the space as I, II (between) and III. Calculate the total electric field strength in all three regi..
A turn on a racetrack has a radius of curvature of 2000 ft and a bank angle theta. If cars travel at 140 mph through the turn find a) the minimum bank angle so the cars won't slip sideways during the turn.
a 20 kg satellite has a circular orbit with a period of 2.7 h and a radius of 8.1 x 106 m around a planet of unknown
q.1 a driver is driving at 68 mihr on a straight highway. he sees an accident on the road in front of him so he slams
An oil film with n = 1.45 floats on water. It is illuminated by white light from the sun at noon. If the film is 280 nm thick, find the wavelength and color of visible light that is most strongly reflected upward to an observer positioned above th..
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