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An elevator accelerates from rest upward at a rate of 1 m/s2 for 4.09 seconds then decelarates at a rate of 1 m/s2 for 4.09 seconds back to rest. The mass of the elevator is 2873.34 kg. What is the tension in the cables?
A piano wire with mass 3.45g and length 85.0cm is stretched with a tension of 31.0N. Calculate the average power carried by the wave
The Yerkes telescope in southern Wisconsin is the largest refracting telescope in the world. What are the focal lengths of the two lenses
a russian submarine and a us submarine move toward each other during maneuvers in motionless water in the north
An electric field is E = 400 N/C i for x > 0 and E = -400 N/C i for x
During 5 successive 0.97 min intervals, a runner moves at the following constant speeds: 0.436 km/min, 0.250 km/min, 0.160 km/min, 0.160 km/min, and 0.320 km/min. calculate the total distance traveled and the average speed.
A football punter accelerates a football from rest to a speed of 10 m/s during the time in which his toe is in contact with the ball (about 0.17 s)
A glass slab surrounded by air causes a sideways displacement in a beam of light.
A balloon is filled with helium gas at 20.0 degrees Celsius at 1.0 atm (1 atm = 1.01 x 10^5 N/m^2). What is he heat flow into the gas
A spacecraft has a nonrelativistic (or classical) momentum whose magnitude is 3.10 × 1013 kg.m/s. Find the relativistic momentum of the spacecraft
A stone is dropped into the water from a bridge 144ft above thewater. another astone is thrown vertically down 1s after thefirst is dropped. what was the initial speed of the second stone
A coil with length of 11 cm and a cross-section of 2.3 cm is connected in series with a 8.0k? resistor. A 42.0 V battery is applied across the two devices, What is the energy density inside the coil
X-rays that come from the vicinity of a black hole actuallyoriginate. One object that is believed to be a black hole in our Galaxyis. What is the Schwarzschild radius of a black hole?
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