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A stone is thrown vertically upward. On its way up it passes point A with speed v, and point B, 4.84 m higher than A, with speed v. Calculate
(a) the speed v and
(b) the maximum height reached by the stone above point B.
It was a rainy day and the coefficient of friction was estimated to be 0.42. Use these data to determine the speed of the car while the driver slammed on (and locked) the brakes.
A car is travelling at 24 m/s while the driver spots a large pothole in the road a distance 35 m ahead. She immediately applies her brakes. If her acceleration is -4.30m/s2, does she manage to stop before reaching pothole? What is the stopping dis..
Sand dunes on a desert island move as sand is swept up the windward side to settle in the leeward side, Calculate the average speed in each case in m/s
An aluminum rod of length l has a resistance of .8 ohms. Half of the rod is machined down so that half of the rod now has half of the radius of the original radius. What will be the new resistance
The ultracentrifuge is an important tool for separating and analyzing proteins in biological research. If the samples are 11 cm from the axis if the rotor and the ultracentrifuge spins at 6.5×10^4 rpm, what is the magnitude of the net force on the ..
A 75kg hiker climbs to the top of a 4000m -high mountain. The climb is made in 5.0h starting at an elevation of 3000m. Calculate the average power output in horsepower
Find the diameter of an aluminum rod that would conduct heat at the same rate as a 2.816 cm diameter copper rod of the same length
An insulated Thermos contains 123 cm3 of hot coffee at 73 °C. You put a 12.0 g ice cube at its melting point to cool coffee. By how various degrees has your coffee cooled one time the ice has melted and equilibrium is reached? Treat the coffee as tho..
q. in 1909 robert millikan was the first to find charge of an electron in his now-famous oil drop experiment. in the
A jetliner has a mass of 2.8 x 105 kg and flies at a speed of 190 m/s. If the speed of light in a vacuum had a hypothetical value of 350 m/s, what would be the magnitude of the jetliner's momentum
A photon has an energy equal to the kinetic energy of an electron with speed, u, which may be close to the speed of light, c. Calculate the ratio of the wavelength of the photon to the wavelength of the electron
The rocket's speed was measured to be 1.49 c. The rocket's rest length is 380m. An observer flying through measured the rocket to be 199m long.
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