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A. What rms current is drawn by a 3400-W electric room heater when running on 120 V rms?
B. What is the power dissipation by the heater if the voltage drops to 107 V rms during a brown-out? Assume the resistance stays the same.
A resistor and a capacitor areconnected in series to an ideal battery of constant terminalvoltage. At the moment contact is made with the battery, thevoltage across the capacitor is .....
Two point charges of equal magnitude are 6.1 cm apart. At the midpoint of the line connecting them, their combined electric field has a magnitude of 37 N/C
Waves moving on a lake have a speed of 2.8 m/s and a distance of 1.6 m between adjacent crests. Find the period of the wave motion
A gem-quality diamond has a small flaw located 1 mm directly below one face. How far below the face does this flaw appear to an observer
A roller coaster (482 kg) moves from A (3.63 m above the ground) to B (28.6 m above the ground). What is the change in the car's kinetic energy KEf - KEo from A to B
A 1000-kg rocket has a net propulsion force of 20 kN (kiloNewtons). What is the net work done on the rocket in kilojoules (kJ)
The force vector A has a magnitude of 75.0 newtons (N) and points due east. The force vector B has a magnitude of 138 N and points 75.6 ° north of east. Find the (a) magnitude and (b) direction of A - B
calculate the ratio of the drag force on a passenger jet flying with a speed of 1100 kmh at an altitude of 10 km to the
A man of mass 86.5 kg and density 970 kg/m3 stands in a shallow pool with 39.1 % of the volume of his body below water
Two sound sources radiating in phase at a frequency of 560 Hz interfere such that maxima are heard at angles of 0 and 25° from a line perpendicular to that joining the two sources. Find out the separation between the two sources. (Wave velocity of..
The new blade on my table saw has a radius of 15.0 cm. My table saw has a maximum speed of 3750 rpm. If it takes 2.50 seconds to get up to this final speed, what is the tangential velocity of the tip of the saw blade,
A pair of in-phase stereo speakers is placed side by side, 2m apart. You stand directly in front of one of the speakers, 5m from the speaker. What do you hear.
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