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A car travels at 35.0 m/s for 40.0 minutes and then travels at 55.0 m/s for 20.0 minutes. What is the average velocity of the car?
If the x position of a particle is measured with an uncertainty of 1.00×10-10 m, then what is the uncertainty of the momentum in this direction
Two cars, starting from rest at x=0 at t=0, are racing. Car A and B both accelerate in a straight line at a constant acceleration (a=4m/s2) for 10s. After 20s, Car B crosses the finish line. How far is the finish line from the starting point of the..
A canoe has a velocity of 0.400 southeast relative to the earth. Find the magnitude of the velocity of the canoe relative to the river
Explain how a submarine is caused to submerge and surface without the use of its propulsion propeller and fins
A diver on a diving board is undergoing simple harmonic motion. Her mass is 55.0 kg and the period of her motion is 0.800 s. What is his mass if the mass of the board is negligible
A 74.8 g sample of copper at 143.2°C is added to an insulated vessel containing 165 mL of glycerol, C3H8O3 (l) (d = 1.26 g/mL), at 24.8°C. The final temperature is 31.1°C. The specific heat of copper is 0.385 J g-1°C-1
The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space.
An iron wire has a cross-sectional area of 1.14 10-5 m2. Carry out steps (a) through (e) to compute the drift speed of the conduction electrons in the wire, If the wire carries a current of 9.0 A, calculate the drift speed of conduction electrons
Calculate the size of the smallest object on Mars that this telescope can resolve. Assume Mars is at its closest distance 7.8 × 1010 m from the Earth
A hot dog cooker heats hot dogs by connecting them to 120 V household electricity. A typical hot dog has a mass of 50g and a resistance of 130ohm . How long will it take for the cooker to raise the temperature of the hot dog from 20c to 80c ? The ..
Torque can be calculated by multiplying the force (N) applied at 90 degrees to the lever arm at a distance (m) from the pivot point (point of rotation), what is the torque on the lever
According to the Bohr model, a hydrogen atom in its lowest energy state has a nucleus consisting of a single proton, What is the magnitude of the "current" flowing around the nucleus
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