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A 15.6 W resistor and a second resistor are wired in parallel to a dc power supply. The current in the 15.6 W resistor is 2.28 A; the current in the second resistor is 1.17 A. Calculate: a) the current in the circuit, b) the potential across the circuit, c) the equivalent resistance of the circuit, d) the resistance of the second resistor, e) the power dissipated by the circuit.
a 104 w lightbulb has a resistance of about 12 when cold 20degc and 137 when on hot. estimate the temperature of the
If a truck generates 15 hp when travelingat a steady 92 km/h, what must be theaverage force exerted on the truck due to friction and air resistance
Who came up with the idea that matter is composed of tiny, indivisible particles - Rutherford's experiment showed that
A 3.50nC point charge is placed at the centre of a hollow metal sphere that has an inner radius 4.90cm and an outer radius 12.0cm. The metal sphere itself is charged to 7.00nC. How much charge is on the inside surface of the hollow sphere? How much c..
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.0398 s, compute the vertical components of the launch velocity
A ball of weight 1.5 N is thrown at an angle of 30° above the horizontal with an initial speed of 12 m/s. the net force (ignoring air resistance) on the ball is:
An object at 20 degrees celsius with heat capacity of 100 cal/degrees celsisu is placed in 40g of water at 100 degreescelsius. After equilibrium is reached, the object is removedfrom the hot water and placed in 200g of water at 0 degreescelsius.
An archer shoots an arrow with a velocity of 48.0 m/s at an angle of 46.5° with the horizontal. What is the initial speed of the apple
A girl is using a rope to pull a box that weight 300 N across a level surface with constant velocity. what is the normal force of the floor on the box
A wooden rod of negligible mass and length 82.2 is pivoted about a horizontal axis through its center. A white rat with mass 0.440 clings to one end of the stick, and the mouse with mass 0.220 clings to the other end. The system is released from rest..
One afternoon, a couple walks three-fourths of the way around a circular lake, the radius of which is 1.46 km. What is the magnitude of the couple's displacement
The beam leaves the prism to the air at a distance d = 43.4 along the base as shown. What is Φ2, the angle the beam in the prism makes with the horizontal axis?
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