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The secondary coil of a step-up transformer provides the voltage that operates an electrostatic air filter. The turns ratio of the transformer is 44:1. The primary coil is plugged into a standard 120-V outlet. The current in the secondary coil is 2.0 x 10-3 A. Find the power consumed by the air filter.
A simple pendulum has a mass of 0.350 kg and a length of 7.00 m. It is displaced through an angle of 12.0° and then released. Solve this problem by using the simple harmonic motion model for the motion of the pendulum.
Automobile Airbags. The human body can survive an acceleration trauma incident (sudden stop) if the magnitude of acceleration is less than 250m/s2.
A 36.0 g bullet moving at 478 m/s strikes a 3.7 kg bag of flour that is on ice, at rest. The bullet passes during the bag, leaving at 255 m/s. How fast is the bag moving when the bullet exits.
A 0.230- coffee cup at 19 is filled with 0.240 of brewed coffee at 97. The cup and the coffee come to thermal equilibrium at 79.If no heat is lost to the environment, what is specific heat of the cup material.
What is the magnitude of the magnetic field that the spectrometer uses? In the operating room, anesthesiologists use mass spectrometers to monitor the respiratory gases of patients undergoing surgery
A grating with 633 slits/cm is illuminated with light of wavelength 419 nm. What is the highest-order number that might be observed with this grating.
Sketch a free-body diagram of the plank. How far can a painter of mass 70.0 kg walk on the overhanging part of the plank before it tips.
A camera takes a perfectly exposed picture when the lens diaphragm is set to f/4 and the shutter speed is 1/250 s, what should the new shutter speed be so that the exposure is still correct
What is the upward force that Olivia applies to the handles in order to hold the wheelbarrow in that position.
A student throws a water balloon vertically down from the top of a building. The balloon leaves the thrower's hand with the speed of 16 m/s. How fast is it traveling after 2.6 seconds.
A gas expands from I to F. The energy added to the gas by heat is 423 J when the gas goes from I to F along the diagonal path.
You are to build a box whose height is 0.280 times its length. In order for the box to have a given volume while using a minimum amount of cardboard, what should be the ratio of the width of the box to its length.
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