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A particular wire has a resistivity of 3.1 x 10-8 •m and a cross-sectional area of 3.8 x 10-6m2. A length of this wire is to be used as a resistor that will develop 48 Watt of power when connected across a 20 Volt battery. Find what length of wire is required?
A physical pendulum consists of auniform rod of length L = 1.5 meters. What is the angular kinetic energy of the rod after 1.0 sec
Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward, What is the total time the blue car is moving, What is the acceleration of the yellow car
A fully charged capacitor with a voltage of 120 V is discharged through a resistor. At this time, what is the voltage across the resistor
A weightlifter bench-presses a 170.0 kg barbell from his chest to a height equal the length of his arms 0.750 m. What is the potential energy of the barbell relative to the weightlifter\'s chest after he lifts the barbell
explosives are used to blow a rock apart. the explosion blows the rock into three fragments. two fragments go off at a
A long cylindrical tube of length L, and density ?t, is very slightly weighted on one end so that it floats upright in a fluid having density, determine the period of the oscillation in terms of L, t, and f
In the figure (Figure 1) the upper ball is released from rest, collides with the stationary lower ball, and sticks to it. The strings are both 48.0 long. The upper ball has mass is 1.80 and it is initially 10.0 higher than the lower ball, which ha..
A classmate throws a 1.3-kg book from a height of 1.2 m above the ground straight up into the air. Determine the velocity of the book just before hitting the ground
capacitors are used in many applications where you need to supply a short burst of energy. a 100 micro f capacitor in
A baseball is thrown straight upward on the moon with an initial speed of 35 m/s. Calculate the time taken to reach that height
A spring with spring constant 14 hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. It is then pulled down 3.0 and released. The ball makes 17 oscillations in 16 seconds. What is it the mass of ball.
When you take a bath, how many kilograms of hot water (51°C) should you mix with cold water (12°C) so that the temperature of the bath is36°C? The total mass of water (hot plus cold) is 189 kg. Ignore any heat flow among the water and its outside sur..
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