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Why the efficiency of the system is higher when the input current of the electrolyser is low? Explain.
astronauts use a centrifuge to simulate the acceleration of a rocket launch. the centrifuge takes 40.0s to speed up
The rms current in an ac circuit with a resistance of 170 is 0.85A. What is the average power consumed with this circuit? What is the maximum power consumed with this circuit?
A meter stick lies on the bottom of a 100 cm long tank with its zero mark against the left edge. You look into the tank at a 30 angle, with your line of sight just grazing the upper left edge of the tank.
An ideal gas expands at a constant pressure of 2.9 atm from 435 mL to 709 mL. Heat then flows out of the gas, determine the total heat flow into the gas
A tennis ball of mass m=0.057kg and speed v=24 m/s strikes a wall at a 45 degrees angle and rebounds with the same speed at 45 degrees. What is the direction of the impulse given to the ball
A solid conducting sphere with a radius of 35.4 cm contains atotal charge of 5.46 mC, evenly distributed over its surface. What is the direction of the electric field at its surface?
a 2.1-m-long vertical pole extends from the bottom of a swimming pool to a point 50.0 cm above the water. What is the length in meters of the shadow of the pole on the level bottom of the pool
Venus has a mass of 4.87 1024 kg and a radius of 6.05 106 m. Assume it is a uniform solid sphere. What is the rotational kinetic energy of Venus on its axis
A charged cork ball of mass 1.26 gram is suspended on alight string in the presence of a uniform electric field. Find what is the charge on the ball
A large balloon of mass 222 kg is filled with helium gas until its volume is 335 m3. Assume the density of air is 1.29 kg/m3 and the density of helium is 0.179 kg/m3. Calculate the buoyant force acting on the balloon
two events occur at the same time in an inertial frame s and are separated by a distance of 1 km along the x axis. what
A horizontal cylinder thermally insulated and closed in both ends has in its interior a diathermic piston that can move without friction. Initially the piston is fixed in such way that it divides the volume in two unequal parts, V0 to the left and..
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