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A crystal is irradiated with X-ray photons with energies of 1.65 × 10-15 J. The atomic planes in the crystal are separated by 0.21 nm. At what angles of incidence will the X-rays reflect from the crystal?
A rocket ship at rest in space gives a short blast of its engine, firing 90 kg of exhaust gas out the back end with an average velocity of 700 m/s.
The drawing shows three identical springs hanging from the ceiling
An electron has an initial velocity of 1.00 ? 106 m/s in a uniform 9.00 ? 105 N/C strength electric field. How long does it take the electron to come to rest
Ilustrate what is the magnitude of the torque about his shoulder if he holds his arm in each of the following ways? Straight out to his side, parallel to the floor.
A tank having a volume of 0.10 m3 contains helium gas at 155 atm. How many balloons can the tank blow up if each filled balloon is a sphere 0.30 -m in diameter at an absolute pressure of 1.3 atm.
A slingshot fires a pebble from the top of a building at a speed of 20.00 m/s. The building is 28-m tall. Ignoring air resistance, find out the speed with which pebble strikes the ground when the pebble is fired (a) horizontally (b) vertically str..
Two disks, (Disk A and Disk B) each having the same mass and Inertia of I=1/2MR^2 are rolling on the floor and then up ramps. The ramp for Disk A has friction, How much farther does it roll
A thin ring of radius R carries a charge 3Qdistributed uniformly over three-fourths of its circumference, and -Q over the rest
A small immersion heater is rated at 350 W. Estimate how long it would take a heat a cup of soup (assume this is 250 mL of water) from 20C to 60C.
Whenever two Apollo astronauts were on the surface of the Moon, a third astronaut orbited the Moon. Determine the astronaut's orbital speed
Lightning occurs when there is a flow of electric charge (principally electrons) between the ground and a thundercloud. How much charge flows between the ground and the cloud
A block of iron has the dimensions of 3.00 cm x 3.00 cm x 3.00 cm. It has a mass of 213 g. When placed in water, the block sinks. What volume of water did it displace.
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