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A force of 90 N is applied to a wagon (mass 40 kg) at an angle of 30° to the horizontal. If the frictional force is 27.94 N, the magnitude of the resulting acceleration of the wagon is ___m/s2.
A plane flying horizontally at a speed of 50.0 m/s and at an elevation of 160 m drops a package. How far apart will the two packages land on the ground (ignore air resistance)
A narrow beam containing 2000 mono energetic photons is reduced to 1000 photons with a slab of copper 10-2 m thick. What is the total linear attenuation coefficient of the copper slab for these photons? If the thickness of the copper slab doubled, do..
A pendulum of length 1.5 m swings back and forth in a friction free laboratory environment. The pendulum is 1.4 m above the floor at the high point of its swing and 1.3 m above the floor at the low point.
A straight object of length 2.7 cm lies along the central axis of a spherical mirror with focal length 8.5 cm. What is the length of its image in the mirror
A dentist uses a small mirror of radius 45 mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 14 mm from the tooth, what is the magnification of the resulting image.
A particle moves horizontally in uniform circular motion, over a horizontal xy plane, What are the coordinates of the center of the circular path
A Cylinder of nitrogen gas (N2, diatomic) at RTP is adiabatically compressed so the final volume is 1/12 the original volume. What is the final pressure and temperature of the gas
An Astronomer is in a spaceship that is orbiting around a planet with a period of 34 hours. What is the mass of the planet
The density of air decreases with altitude. Consider a planet having a layer of atmosphere extending no more than 70.0 km above the surface. The atmospheric pressure at the surface of this planet is 80.0 kPa, and the average radius of this planet is ..
The lead female character in the movie Diamonds Are Forever is standing at the edge of an offshore oil rig. As she fires a gun, she is driven back over the edge and into these. Find what recoil velocity does she acquire
a 3-kg rock is tied to the end of a string and twirled overhead 1.9 m above the ground in a 0.8-m radius horizontal
You took a job as a space station scientist. On a spacewalk you get separated from the station. At what speed will you move back toward the station
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