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What minimum speed does a 130g puck need to make it to the top of a frictionless ramp that is 4.3m long and inclined at 20o?
a car traveling due east at 20 m/s reverses its direction over a period of 10 seconds so that it is traveling due west at 20 m/s. find the direction of the car's average acceleration
A magnifier used for reading small print is shaped like a hemisphere 2 centimeter in radius, located on top of a cylinder of the same radius and 2 centimeter tall. Obtain where does the image of the print appear to be
a closed system undergoes a cycle consisting of two processes. during the first process 40 btu of heat is transferred
A balloon is filled with 4.65 liters of helium at a pressure of 1.10 atm and a temperature of 26.5° C. Discover the mass of the helium. Discover the buoyant force on the balloon if it is placed in the atmosphere with air pressure at 1.00 atm and temp..
Two blocks are connected by a string. The smooth inclined surface makes the angle of 35 degrees with the horizontal, and the block on the incline has a mass of 5.7 kg.
A spaceship of mass 2.00 106 kg is to be accelerated to a speed of 0.820c. What minimum amount of energy does this acceleration require from the spaceship's fuel, assuming perfect efficiency?
A gun shoots bullets that leave the muzzle with a speed of 338 m/s. If a bullet is to hit a target 104-m away at the level of the muzzle, the gun should be aimed at a point above the goal.
A helium-neon laser emits light of wavelength 632.8 nm and has a power output of 13 mW. How many photons are emitted per second by this laser
A 1 170.0 kg car traveling initially with a speed of 25.000 m/s in an easterly direction crashes into the back of a 9 800.0 kg truck moving in the same direction at 20.000 m/s. What is the change in mechanical energy of the car-truck system
A rotating wheel requires 6.00 s to rotate 26.0 revolutions. What is the constant angular acceleration (in rad/s) of the wheel
During a particular thunderstorm, the electric potentialdifference between a cloud and the ground is Vcloud -Vground = 1.3 x 108 V, What is the change in an electron's potential energy
A 25.0g sample of copper at 363 K is placed in 100g of water at 293 K. Calculate final temperature of the water
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