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A worker pushed a 65.0-kg block 10.0 m along a level floor at a constant speed with a force directed 39.0° below the horizontal. If the coefficient of kinetic friction is 0.20, how much work did the worker do on the block?
An ideal gas at STP, originally occupying a volume of 0.115 m^3, expands isothermally until its pressure falls to 0.85 atm. How much heat flows into the gas
M1 is a spherical mass (43.0 kg) at the origin. M2 is also a spherical mass (17.2 kg) and is located on the x-axis at x = 99.0 m. At what value of x would a 16.5-kg mass experience no net gravitational force due to M1 and M2?
A 0.15-kg of aluminum contains 0.2 kg of water. Initially, the water and the cup have a com- mon temperature of 18 0C, find the specific heat capacity of the unknown material
The impact of the head of a golf club on a golf ball can be approximately regarded as an elastic collison. what must the speed of the club be before impact
An electron in the n = 6 state of a hydrogen atom makes a transition to the n = 3, What is the wavelength of the photon emitted
A parallel-plate capacitor has an area of 5.15 cm2, and the plates are separated by 1.05 mm with air between them. It stores a charge of 337pC. What is the potential difference across plates of the capacitor.
A 1.0-kg block of ice at -5ºC is dropped into a 55-gallon barrel of water at 80ºF. What is the final state of the mixture
Find the magnitude of the acceration of each block. what is the magnitude of the average force exerted on the ball by the wall.
The drawing shows a wire composed of three segments, AB, BC, and CD. There is a current of I = 2.0 A in the wire. Find the magnitude of the force that acts on each segment
Two point charges lie on the x axis. A charge of 6.2uC is at the origin, and a charge of -9.4uC is at x=10.0cm. What is the net electric field at x=+4.0cm
When a spring cannon is horizontal, above the ground by 0.83m. by what factor would you expect the range to change
A 500 kg vehicle is cruising down the highway at 30 m/s when the driver creates an average force of 700 N by stepping on the gas. How much work was done by the vehicle during the .50km of acceleration
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