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The potential difference between the terminals of a battery is 12V when measured directly using a voltmeter. When the battery is connected to a load of 240?, the reading of the voltmeter becomes 9.6V. What is the internal resistance of the battery? What load resistance should be used so the battery delivers the most power to it? What is this maximum power?
What is the mass of the liquid in the vat.
A lottery machine uses blowing air to keep 2000 Ping-Pong balls bouncing around inside a 1.0m X 1.0m X1.0m box. The diameter of a Ping-Pong ball is 3.0 cm. What is the mean free path between collisions?
The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.69 m and 1.04 m, respectively. The respective rotational speeds are 452 rev/min and 4,140 rev/min. Calculate the speeds of the tips of both rotors
Resistance are 10N per 1000 for the engine 5N per 1000kg for the trailer. So what's the forward thrust exerted by the engine?
What is its angular displacement in this time.
define the magnitude of the acceleration of the block. What is the electric ?eld strength.
Find out the magnetic field strength
A physics professor is pushed up a ramp inclined upward at an angle 34.0 degrees above the horizontal as he sits in his desk chair that slides on frictionless rollers, Use the work-energy theorem to find his speed at the top of the ramp
The temperature of the air in a resonator is 15°C, when a tuning fork vibrates at one end, the spacing between tow successive resonances is found to be 50 cm. find the frequency of the tuning fork.
Al moves off with a speed of 8.98 m/sec in one direction and Jo moves off with a speed of 9.70 m/sec in the other. You can assume friction is negligible. What is Al's mass.
What plate separation is required for a parallel plate.
Thus, to eliminate the difficulties with motion sickness, designers must choose the distance between the astronaut's feet and the axis about which the space station rotates to be greater than a certain least value. What is this least value.
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