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a capacitor is connected across the terminals of an ac generator that has a frequency of 448 Hz and supplies a voltage of 21 V. When a second capacitor is connected in parallel with the first one, the current from the generator increases by 0.17 A. Find the capacitance of the second capacitor.
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The volume control on a surround-sound amplifier is adjusted so the sound intensity level at the listening position increases from 21 to 59 dB. What is the ratio of the final sound intensity to the original sound intensity?
A 54.0 kg skateboarder wants to just make it to the upper edge of a "quarter pipe," a track that is one-quarter of a circle with a radius of 3m. What speed does he need at the bottom?
A weightlifter works out at the gym each day. Part of her routine is to lie on her back and lift a 40 kg barbell straight up from chest height to full arm extension, a distance of 0.51m. How many 400 Calorie donuts can she eat a day to supply that..
Explain how fast will he be moving backward just after releasing the ball?
A man stands on the roof of a building of height 16.8m and throws a rock with a velocity of magnitude 31.8m/s, Calculate the magnitude of the velocity of the rock just before it strikes the ground
What is the charge on the drop. A 13 kg child on a playground swing moves with a speed of 3.6 m/s when the 6.0 m long swing is at its lowest point. What is the angle that swing makes with the vertical when the child is at the highest point.
Angel Falls in southeastern Venezuela is the highest uninterrupted waterfall in the world, dropping 979 m (3212 ft). Assume that it takes 14 s for the water to fall from the lip of the falls to the river below. If the water lands 55 m from the bas..
A car takes 11 s to go from v = 0 to v = 75 m/s at approximately constant acceleration. If you wish to find the distance travelled using equation d = 1/2 at2, what value should you use for a.
A magnetic field is perpendicular to a 0.0409 m x 0.0585 m rectangular coil of wire that has 115 turns, What is the magnitude of the change in the magnetic field
For a short time, the path of the plane is described by If the plane is rising with a constant velocity of 10 m/s, determine the magnitudes of the velocity and acceleration
Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10?2cm , mounted coaxially within a cylindrical anode with a radius of 0.5580cm, Find its speed vfinal when it strikes the anode
Two boats are initially separated by distance d and head directly toward one another. The skippers of the boats want to arrive at the same time at the point that is halfway between their starting points.
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