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An electronic flash attachment for a camera produces a flash by using the energy stored in a 860-mu F capacitor. Between flashes, the capacitor recharges through a resistor whose resistance is chosen so the capacitor recharges with a time constant of 2.9 s. Determine the value of the resistance. Number Units
A small 12.3g plastic ball is tied to a very light 26.6cm string that is attached to the vertical wall of a room. A uniform horizontal electric field exists in this room. Find the magnitude of the electric field in the room
A robber's getaway vehicle, which can travel at 0.8c, is pursued by a cop. whose vehicle can travel at 0.4c. Realizing that he cannot catch up with the robber, the cop tries to shoot him with bullets that travel at 0.5c (relative to the cop). Can the..
You are driving a long, thinking about a difficult physics problem, and you fail to notice the warning lights at the entrance to a drawbridge. how fast were you going when you struck the bridge
A horizontal 5-cm diameter water jet with a velocity of 18 m/s impinges normally upon a vertical plate of mass 1000 kg. The plate rides on a nearly frictionless track and is initially stationary. When the jet strikes the place, the plate begins to..
A block of mass m = 8 kg is pushed across a rough table with a force applied at an angle of 40 with respect to the horizontal direction, what is the work done by friction
Explain how far west has the sailboat traveled in 29 ? How far north has the sailboat traveled in 29?
Find the relationship between the length h and width a of a regular right triangular prism such that the prism is equally likely to land on each face when: A. dropped from a great height in th air.
A 1.5 kg box moves back and forth on a horizontal frictionless surface between two different springs with spring constants of 16 N/cm and 32 N/cm. What is the maximum speed the box will reach
Consider a charge of +1 nC (nanocoulombs, or Coulombs ×10?9) at (-3, -4) m, and a charge of -2 nC at (12, -5). Calculate the electric field strength at the origin
One mole of an ideal gas expands from 5 to 1 atm at 25 oC. Calculate W (a) if the gas expands isothermally, (b) and if the gas expands adiabatically.
A circular loop of radius 21 cm is located in the plane of the paper inside a homogeneous magnetic field of 0.3 T pointing into the paper. It is connected in series with a resistor of 127 W. The magnetic field is now increased at a constant rate b..
If the initial temperature of the horseshoe is 450 °C, and the initial temperature of the water is 45° C, what is the equilibrium temperature of the system? Presume no heat is exchanged with the surroundings.
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