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(a) Find the current in a 9.00 ? resistor connected to a battery that has an internal resistance of 0.30 ? if the voltage across the battery (the terminal voltage) is 15.00 V.
(b) What is the emf of the battery?
An airplane's takeoff speed is 320 km/h. If its average acceleration is 2.90 m/s^2, how long is it on runway after starting its takeoff roll.
A 400kg piano slides 4.0 m down a 30 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. Find out the force exerted by the man.
neglect air resistance during the descent. she comes to rest 3 m under the surface of the water. Find out the average force that the water exerts on the diver
Assume the charge on black hole is 5740 C. At what distance from it is the electric potential equal to 1100 V.
A spaceship is coming directly toward you while you are in the international space station. You are told that the spaceship is shining sodium light. You have an apparatus that and resolve two closely spaced wavelengths if the difference is 0.55 nm. I..
Here is a box on whose surfaces the electric field is measured to be horizontal and to the right, Calculate the electric flux through every face of the box, Calculate the total flux through the box
A rectangular block of ice 12 m on each side and 1.2m thick floats in sea water. The density of the sea water is 1025 kg/m3. The density of ice is 917kg/m3.
A spotlight is coated so that it won't transmit magenta light from its white-hot filament. What colour emerges from coated spotlight.
One mole of an ideal gas at 27 °C is expanded isothermally from an initial pressure of 3 atm to a final pressure of 1 atm in two ways. (a) reversible, and (b) against a constant external pressure of 1 atm. find q, w, ΔU, ΔH, ΔSsys, ΔSsurr, ΔStotal..
If an electric field strength greater than 3.88E+6 N/C causes the air to break down and conduct charge (lightning), what is the maximum charge the cloud can hold
Estimate mean and maximum velocities for a liquid
A rotating cylinder about 18km in length and 6km in diameter is designed to be used as a space colony. With what angular speed must it rotate so that residents on it will experience the same acceleration because of gravity on Earth.
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