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An open train car, with a mass of 2130 kg, coasts along a horizontal track at the speed 2.41 m/s. The car passes under a loading chute and, as it does so, gravel falls vertically into it for 2.59 s at the rate of 489 kg/s. What is the car\'s speed after the loading is completed? Ignore rolling friction (as unrealistic as that may be).
Light of wavelength 400 nm is incident normally on a film of water 1.0 µm thick. The index of refraction of water is 1.33. What is the wavelength of the light in the water
You are running toward an approaching marching band. You are moving at 9.3 m/s and the band is moving at 2.7 m/s
In 1965 Arno Penzias and Robert Wilson discovered the cosmic background radiation (this is the radiation left over from the Big Bang!)
Estimate the gravitational force between the Sun and Venus. The mass of the Sun is 1.99×10^30 kg. The mass of Venus is 48.7×10^23 kg. The distance between them is 10.8×10^10 m.
A mass of gas occupies a volume of 4.3 L at a pressure of 1.8 atm and a temperature of 345 K. Determine the final pressure
A basketball player is standing on the floor 10.0 m from the basket, What is the acceleration of the basketball at the highest point in its trajectory
q1. from t 0 to t 5.00 min a man stands still and from t 5.00 min to t 10.0 min he walks briskly in a straight line
At what distance from the wire would the magnitude of the magnetic field equal to the strength of the Earth's magnetic field of 5.0 x 10^-5 T?
On an air track, a 400g glider moving to the right at2.00 m/s collides elastically with a 500g glider moving in theopposite direction at 3.00 m/s. Find the velocity of first glider after the collision
An airplane, diving at an angle of 53° with the vertical, releases a projectile at an altitude of 730 m. How far did the projectile travel horizontally during its flight
A car whose initial speed is 40 m/s undergoes a constant acceleration of -5 m/s2 for 6 s when its brakes are applied. How far does the car travel
A NASCAR racecar rounds one end of the Martinsville Speedway. what is the racecar\'s centripetal (radial) acceleration
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