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A lamp (R = 147 ), anelectric heater (R = 26),and a fan (R = 48 ) areconnected in parallel across a 115 Vline.a) what total current is supplied to the circuit?b) what is the voltage across the fan?c) what is the current in the lamp?d) what power is expended in the heater?
A rocket is launched at an angle of 52.0° above the horizontal with an initial speed of 96 m/s. Find the maximum altitude reached by the rocket
a 3.0-kg block is connected to two ideal horizontal springs having force constants k1 14.0nbspncm and k2 20.0 ncm see
A girl is strapped to a board that is moving so that gamma along the length of the board is 2.0. What is the length of the girl's board in your reference frame when she arrives
An airplane flies in a loop (a circular path in a vertical plane) of radius 150m . The pilot's head always points toward the center of the loop, What is the apparent weight of the pilot at this point
Suzie (of mass 68 kg) is roller-blading down the sidewalk going 48 miles per hour. What is Suzie's average acceleration
A gas is enclosed in a cylinder fitted with a light frictionless piston and maintained at atmospheric pressure, evaluate the change in internal energy of the gas
Your medieval history class is constructing a trebuchet, a catapult-like weapon for hurling stones at enemy castles, Find an expression for the angle that will maximize the range of a projectile launched with speed from height above level ground
To a person swimming 0.790m beneath the surface of the water in a swimming pool, what is the actual height of the diving board above the surface of the water
In a certain electron beam, there are 4.5 x 106 electrons per cubic centimetre. The kinetic energy of the electrons is 12.0 keV, Find the beam current
A capacitor that is initially uncharged is connected in series with a resistor and a 400.4V emf source with negligible internal resistance, What is the resistance of the resistor
Suppose a flat roof has a surface area of 9.20000×101 m2. Presume the air inside the building (and under the roof) is at atmospheric pressure, 1.01325×105 Pa, What is the lift force acting on the roof
An expansion process on a diatomic ideal gas , has a linear path between the initial and final coordinates on a pV diagram. The coordinates of the initial state are: the pressure is 300 kPa, the volume is 0.060 m3, and the temperature is 390 K.
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