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1. A battery with an internal resistance of 0.50 ohms has a current of 0.78A through it when it is connected in a circuit whose external resistance is 1.50 ohms. In this circuit, what is the potential difference between the terminals of the battery?
2. Power is being transmitted through normal transmission lines from a generator to a substation. If the input voltage is doubled and the current halved, how will the power input and the useful power output change?
the hammer throw is a track-and-field event in which a 7.8-kg ball the hammer starting from rest is whirled around in a
a charged particle of mass 0.0020 kg is subjected to a 6.0 t magnetic field which acts at a right angle to its motion.
A 40.0g ball of clay traveling east at 3.00m/s collides, What is the speed of the resulting ball of clay
Three resistors with values 0.90? , 2.9? , and 4.2? are connected in parallel in a circuit with a 6.4V battery. What is the total equivalent resistance
for cindys car here are the coefficients of friction between the tires and the road static .700 kinetic .500suppose
A motorist drives north for 36.0 minutes at 67.0 km/h and then stops for 15.0 minutes. He then continues north, traveling 130 km in 2.00 h. What is his total displacement
A skier of mass 68.4 kg glides down a hill of slope 26.5o at constant speed. If she travels a distance 35.0m down the hill, What is the work done by friction
A cork ball of mass 6.05 g is placed between two very large horizontal planes of charge. The bottom plane has a uniform charge density of +0.52 uC/m2, What is the charge on the ball
A 0.80 g cork ball with a charge of 1.50 µC is suspended vertically on a 0.300 m long light string in the presence of a uniform, downward-directed electric field of magnitude E = 1.00*105 N/C. If the ball is displaced slightly from the vertical, it o..
A laser emits a narrow beam of light. The radius of the beam is 1.5 mm, and the power is 2.9 mW. What is the intensity of the laser beam
A block with mass 1.871 kg sliding on a frictionless surface is attached to a horizontal spring with spring constant 11.69 N/m at the equilibrium position of the spring. The block is then pulled a distance 13.99 cm from the equilibrium point and rele..
question two particles with identical positive charges and a separation of 2.70 10-2 m are released from rest.
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