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A mercury barometer reads 750 mm on the roof of a building and 766 mm on the ground. Assuming a constant value of 1.29 kg/m3 for the density of air, determine the height of the building.
A 100 percent efficient electric motor is lifting a 15N weight at 25cm/s. If the motor is connected to a 7V battery, how much current does it draw.
The potential difference across a typical cell membrane is about 76 mV. How much work is done on a singly ionized potassium ion moving through the membrane
Describe the 4 S reactor. Compare it to a traditional reactor, What are the advantages of nuclear power
A proton is travelling to the right at. It has a head-on perfectly elastic collision with a carbon atom. The mass of the carbon atom is 12 times the mass of the proton. What are the speeds of each after the collision? What is the direction of the pro..
Rhea, one of Saturn's moons, has a radius of 765 km and an acceleration due to gravity of 0.278 m/s2 at its surface. Calculate its mass and average density.
A spring with spring constant 14 hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. It is then pulled down 3.0 and released. The ball makes 17 oscillations in 16 seconds. What is it the mass of ball.
Find the self-inductance of a solenoid 44cm long and 6.0cm in diameter that contains 2000 turns of wire
A jet airliner, moving initially at 330 mi/h to the east, suddenly enters a region where the wind is blowing at 100 mi/h toward the direction 30.0° north of east
Calculate g for space shuttle territory. A 7.0×10-2-{rm kg} toy airplane is tied to the ceiling with a string. When the airplane's motor is started, it moves with the constant speed of 1.30 m/s in a horizontal circle of radius 0.47 m.
q1. a ship sets out to sail to a point 128 km due north. an unexpected storm blows the ship to a point 148 km due east
A 0.464-nm photon collides with a stationary electron. After the collision, the electron moves forward and the photon recoils backwards. Find the momentum of the electron
A car with a mass of 800 kg moves up a hill inclined at an angle 15? to the horizontal with a constant acceleration of 2.5 ms?2. Find the force of the engine
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