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Assume a load resistor RLoad is placed in parallel with a 12 volt battery and you measure the voltage across this resistor to be 6 volts. What is the internal resistance of the battery?
A charge of +6.0µC experiences a force of 2.0 mN in the +x-direction at a certain point in space. What was the electric field there before the charge was placed there
Assume air resistance is negligible; from what height (in cm) above the compressed spring was the block dropped.
A fishing line has attached to it a hollow plastic float 2.65 cm in diameter and having a mass of 1.50 g. Find the mass of a lead weight
The equation of a transverse wave on a string is y = (2.0 mm) sin[(19 m-1)x - (625 s-1)t]. The tension in the string is 11 N. Find the linear density of this string
Assume a neuron in the brain carries a current of. Treating the neuron as a straight wire, what is the magnetic field it produces at a distance of 7.50.
It costs 2.5 cents to charge a car battery at a voltage of 12 V and a current of 13 A for 120 minutes. What is the cost of electrical energy per kilowatt-hour
A 10.1-g bullet is fired into a stationary block of wood having mass m = 5.04 kg. The bullet imbeds into the block. What was the original speed of the bullet
find the highest distance throughout which his center of gravity can fall without his breaking a bone.
A source emits sound uniformly in all directions. There are no reflections of the sound. At the distance r1 from the source the sound is 3.9 dB louder than it is at a distance r2 from the source. What is the ratio r1/r2.
A football player with a mass of 89 kg and a speed of 2.1 m/s collides head-on with a player from the opposing team whose mass is 120 kg. Find the speed of the second player
What is the average linear speed of Jupiter about the Sun, (The distance from the Sun to Jupiter is 7.78 1011 meters. The orbital period around the Sun is 4332.7 days.)
A 175 watt motor is used to lift a 129 kg container to a height of 7m. How much time does it take to lift container with the motor.
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