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Two steel wires are stretched with the same tension. the first wire has a diameter of 0.610mm and the second wire has a diameter of 0.910mm. If the speed of waves travelling a long the first wire is 54.0m/s what is the speed of waves traveling a long the second wire?
A cigarette lighter in a car is a resistor that, when activated, is connected across the 12-V battery. Find the current that the battery delivers to the lighter
A fellow astronaut passes by you in a spacecraft traveling at a high speed. The astronaut tells you that his craft is 20.0 m long and that the identical craft you are sitting in is 19.0 m long. According to your observations,
An electron is accelerated to a speed where its total energy is 209 times larger than its rest energy. What is the speed of the electron in terms of the speed of light
What is the maximum potential that the dome of a van de Graaf generator can be safely charged to if its radius is 20cm and the breakdown electric field in air is 3.0MV/m
An object initially at rest explodes in two fragments of masses 2.6 kg and 3.3 kg that move in diametrically opposite directions. find the internal energy of the explosion
The Mars Reconnaissance Orbiter circles the red planet with a 119 period. The mass of Mars is 6.42*10^23 , the radius is 3.38*10^6. What's the spacecraft's altitude?
A fireman 52 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of 32° above the horizontal.
A spacecraft has a nonrelativistic (or classical) momentum whose magnitude is 1.8×1014 kg·m/s. Find the relativistic momentum of the spacecraft
A gas with initial conditions (P,V,T)i expands isothermally until the final volume=6.389 times the initial volume
Amy is sitting on top of a building 50m high She throws ball with initial velocity of 10m/s upward at angle of 30 degrees to horizontal. g= 10m/s^2, Where does the ball strike the ground
A Carnot engine with a hot-reservoir temperature of 360 has the same thermal efficiency. What is the cold-reservoir temperature in C?
A muon is an elementary particle that can be interpreted as the electron's big brother. Calculate its "Compton Wavelength"
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