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A roller-coaster car moves 177 ft horizontally and then rises 139 ft at an angle of 30° above the horizontal. It then travels 139 ft at an angle of 40° downward. What is its displacement from its starting point? Use graphical techniques.
State your answer in terms of and Use three significant figures in the numerical coefficient.
A typical nuclear power plant delivers heat from the reactor to the turbines at a temperature of 480°C. what is the maximum possible efficiency of these turbines
A hockey player strikes a 166 g puck, accelerating it from rest to 48 m/s. If the hockey stick is in contact with the puck for 2.5 ms, what is the average force applied by the stick
Speedboat A negotiates a curve whose radius is 115 m. Speedboat B negotiates a curve whose radius is 194 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
All distant galaxies are moving away from us. Describe why this does not imply that we are at the center of universe.
A rubber ball is bouncing along the lever floor. after each bounce it only goes back up to half of the height that it just fell from. make a proportional sketch displaying this ball bouncing six times.
A 2.0-kg piece of marble at 100 degree C is dropped into 1.5 kg of water at 1.0 degree C, What is the specific heat of the marble
(a) How far is the tortoise from the finish line when the hare resumes the race? (Please provide numerical answer in m) (b) For how long in time was the hare stationary?
What is the thinnest soap film (excluding the case of zero thickness) that appears black when viewed by reflected light with a wavelength of 480 {rm nm}? The index of refraction of the film is 1.33, and there is air on both sides of the film.
A gun shoots bullets that leave the muzzle at 213m/s. If a bullet is to hit a target 160.4m away at the level of the muzzle, the gun must be aimed at a point above target. (Neglect air resistance.)
How fast must the car be travelling just as it leaves the cliff in order to clear the river and land safely on the opposite side.
A vacuum cleaner is plugged into a 120.0-V socket and uses 2.4 A of current in normal operation, Find the coil resistance of the motor
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