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An arrow is shot vertically upward and then 2.06 s later passes the top of a tree 41.3 m high. How much longer will the arrow travel upward, and how high will it go?
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If you have 0.326 m^3 of water at 25 degrees celsius and add 0.127 m^3 of water at 95 degrees celsius; what is the final temperature of the mixture
Time standards are now based on atomic clocks. A promising second standard is based on pulsars, what is the associated uncertainty
A laser pulse has an energy of 16 J and a beam radius of 2 mm. The pulse duration is 13 ns and the energy density is constant within the pulse. What is the total energy density within the pulse
The potter can stop the wheel in 7.0 s by pressing a wet rag against the rim and exerting a radially inward force of 68 N. Find out the effective coefficient of kinetic friction between the wheel and the wet rag.
A figure skater can increase her spin rotation rate from an initial rate of 1.0 rev every 2.8 s to a final rate of 3.3 rev/s. what is her final moment of inertia
A train is en route from Chicago to New York at 110km/h when the engineer spots a cow on the track. How far was the train from the cow when the engineer first applied the brakes
A photon whose energy is 2.6 Ã- 10âˆ'14 J is scattered off an electron at an angle of 56â. What is the wavelength of the scattered wave
Some European trucks run on energy stored in a rotating flywheel, with an electric motor getting the flywheel up to its top speed of 110 π rad/s. What is the kinetic energy of the flywheel after charging
A parallel-plate capacitor with plate area3.5cm2 and air-gap separation 0.50?mm is connected to a 12-V battery, How much work was required to pull the plates to their new separation
What is the electric field strength between the disks? A proton is shot from the negative disk toward the positive disk. What launch speed must the proton have
Assuming that all photons reaching the solar cell give their energy to a charge carrier, what is the minimum power of a flash of light of wavelength 540nm that can be detected
At what speed would your 4.98 m long car fit in the 4.19 m Part 1 When parked, your car is 4.98 m long. Unfortunately, your garage is only 4.19 m long. How fast would your car have to be moving (in c) for an observer on the ground to find your car..
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