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Two cylindrical artificial bones are made of the same material and length, one with twice the radius as the other. When the two have the same tension force applied, the larger bone stretches by what factor compared to the smaller bone?
A steel rod has a length of exactly 0.2cm at 30degree centigrade. what will be its length at 60degree centigarde?
A child in danger of drowning in a river is being carried downstream by a current that has a speed of 2.75 km/hr. The child is 0.560 km from shore and 0.750 km upstream of a boat landing when a rescue boat sets out. If the boat proceeds at its maximu..
A 72-kg base runner begins his slide into second base when he is moving at a speed of 3.9 m/s. How far does he slide
In a constant-volume process, 201 J of energy is transferred by heat to 0.97 mol of an ideal monatomic gas initially at 306 K. Find the increase in internal energy of the gas
What was the temperature of the water before the insertion of the thermometer.
An asteroid, who's mass is 7.8 × 10-4 times the mass of Earth, revolves in the circular orbit around the Sun at a distance that is 2.5 times the Earth's distance from the Sun.
A charge of -2.95 µC is fixed at the center of a compass, What are the magnitude and direction of the net electrostatic force acting on the charge at the center
A simple pendulum has a mass of 0.250 kg and a length of 6.00 m. It is displaced through an angle of 14.0° and then released. What is the maximum restoring force
Mary needs to row her boat across a 120{\rm m} -wide river that is flowing to the east at a speed of 1.5{\rm m/s}. how far downstream will she land
Two cars B and C approach car A in opp directions with a speed of 54 km/h each. At a certain instant, when the distance AB is equal to AC, both being 1km, B decides to overtake A before C does.
It collides with a 10,000 kg railway car resting at the bottom of the track with its brakes off. The two cars couple together and roll up the track to a height of h. find out h.
The rest energy E of an electron has a rest mass of 9.11 x 10 -31kg. Using Einstein's famous equation E = mc 2, find the rest energy of that electron
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