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A car has a constant acceleration. At 30m, its speed is 30 m/s and at 30 seconds, its speed is 40 m/s, while it is at rest at t=0 (but not x=0). What velocity does it have at 15m?
A skier starts from rest at the top of a hill. The skier coastsdown the hill and up a second hill, as the drawing illustrates. Thecrest of the second hill is circular, with a radius of 31.5 m.Neglect friction and air resistance.
find the electric field outside a uniformly charged hollow cylindrical shell with radius r and charge density sigma an
8.2 moles of an ideal monatomic gas expand adiabatically, performing 8900 Joule of work in the process. Find the change in temperature of gas during this expansion
A beam of light is incident from air on the surface of a liquid. Ifthe angle of incidence is 30.0° and theangle of refraction is 21.0°, find the critical angle for the liquid
The water cooling system in a car engine that carries hot water from the engine block to the radiator is an example of cooling by: Transfer ? Conduction ? Convection or Radiation?
A 0.157-kg particle undergoes simple harmonic motion along the horizontal x-axis between the points x1 = -0.253 m and x2 = 0.495 m. Find the force constant, k, and the total mechanical energy
An archer pulls his bow string back 0.440 m by exerting a force that increases uniformly from zero to 224 N. What is the equivalent spring constant of the bow
A proton is accelerated from rest through a potential difference of 350MV, What's the ratio of kinetic to rest energy
When a diver jumps into the ocean, water leaks into the gap region between the diver's skin and her wetsuit, estimate how much energy (in units of candy bars = 300 kcal) is required by this heating process
High-voltage power lines are a familiar sight throughout the country. What is the resistance of ten kilometers of this wire
A crate of mass 10.2 kg is pulled up a rough incline with an initial speed of 1.60 m/s. What is the change in kinetic energy of the crate
An undersea research chamber is spherical with an external diameter of 5.20 m. The mass of the chamber, when occupied, is 66400 kg. find the buoyant force on the chamber
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