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Problem: Suppose you connect a 25 mH coil with internal resistance of .65 ohms to a 360 Hz power supply and a capacitor C. If the current and voltage are to be in phase, what value must C have?
Show all work, use additional paper if necessary.
As a space craft approaches a planet, the rocket engines on it are fired to slow it down so it will go into orbit around the planet. how long must the engines be fired
An electron is a subatomic particle (m = 9.11 x 10-31 kg) that is subject to electric forces. estimate the magnitudes of the net force acting on electron
A hiker, who weighs 810 Newton, is strolling through the woods and crosses a small horizontal bridge. Find the magnitude of the force that a concrete support exerts on the bridge at the far end
A fire helicopter carries a 649 kg bucket of water at the end of a 18.7 m long cable. Flying back from a fire at a constant speed of 44.2 m/s, Determine the force of air resistance on the bucket
A slide projector needs to create a 97 cm high image of a 2.0 cm tall slide, How far should you place the lens from the slide
a clay vase on a potters wheel experiences an angular acceleration of 7.62 rads2 due to the application of a 18.4-n m
In a TV set, an electron beam moves with horizontal velocity of 3.1×107 m/s across the cathode ray tube and strikes the screen, 50 cm away. How far does the electron beam fall while traversing this distance
a quasars spectrum shows a shift in spectral lines of 0.158. Use the doppler-shift formula to determine what recession velocity this shift indicates, calculate the recession velocity in kms per second
a 24-inch string is wrapped around the 18-inch radius axis of a yo-yo. starting from rest the yo-yo descends with a
A block of mass 77 g floats on a fluid, oscillating up and down at a frequency of 8 Hz. What is the value (in N/m) of the effective spring constant of the fluid
An elevator has mass 670 kg, not including passengers. What is the maximum number of passengers that can ride in the elevator
A dead tree is initially stationary and there is a 30.0-degree angle between the tree and the vertical, How fast is the top of the tree moving (in m/s) just before it hits the ground
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