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A portable electric heater is powered by a 45 V battery. Ithas four identical heating elements inside, wired in series. If acurrent of 14 A runs through them when the heateris turned on, what is the resistance of each heating element?
Jack is a second-grade student. He seems to have no interest in learning, frequently daydreaming in class and frequently disrupting the class by throwing objects at other students. Explain how a bio psychosocial approach may provide both an integrate..
a bar magnet is dropped through a loop of wire, what is the direction of the current at the instant it is in the middle
What is the instantaneous power, at a time of 0.00700 seconds, dissipated by a 200 ohm resistor in a resonant AC circuit powered by a generator with a 21.0 V greatest potential difference operating at 5000 rad/s .
a light ra reflects from a mirror hanging vertically on a wall in your bathroom, and the ray strikes a particular point on the opposite wall. what is the length L of the room
How far from the center of the earth must a person be to experience acceleration as the reason of gravity that is one half the acceleration at the surface.
Two objects attract each other gravitationally with a force of 3.1×10?10N when they are 0.45m apart. One of the object has a mass of 2.0kg. Find the mass of the other object
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800 , length 89.6 and diameter 3.00 from a storage room to a machinist. Calculate the weight of the rod
an olympic weightlifter snatches 100 kg. In a snatch the barbell is moved from a stationary position on the floor to a stationary poition over the athlete's head. determine the weightlifter's average power output
A playground merry-go-round has radius 2.10m and moment of inertia 2200kg*m^2 about a vertical axle through its center, compute the average power supplied by the child
a hollow spherical shell with mass 1.55 kg rolls without slipping down a slope angled at 39.0.part a find the
the speed of hockey pick decreases from 45.00 to 44.67 m/s in coasting 16 m across the ice. find the coefficient of kinetic friction between the puck and the ice
the electric field just above the surface of the charged drum of a photocopying machine has a magnitude e of 3.1 x 105
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