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A 300g ball swings in a vertical circle at the end of a 1.3-m-long string. When the ball is at the bottom of the circle, the tension in the string is 12N.
What is the speed of the ball at that point?
Suppose in the drawing that I1 = I2 = 13.6 A and that the separation between the wires is 0.0244 m. What is the magnitude of the external field
A 92 kg climber rappels down the rope applying friction with figure eight (piece of climbing equipment ) to reduce his his downward acceleration.
A stone is dropped into a river from a bridge 41.9 m above the water. What is the initial speed of the second stone
the cycle for a heat engine that uses a gas having ? =1.25. The initial temperature is T1=300K, What is the power output of the engine
A small mailbag is released from a helicopter that is descending steadily at 1.00 m/s. After 3.00 s, What is the speed of the mailbag
In the circuit shown, the AC voltage source supplies an rms voltage of 157 V at frequency f. The circuit has R = 96 %u03A9, XL = 215 %u03A9, and XC =99 %u03A9. Find the rms current flowing in the circuit
A express train travels along a straight line between two stations, A and D. Stations B and C are spaced evenly along the line between A and D. The engineer leaves A and accelerates at a constant rate until he passes station B
The root-mean-square speed at 299K is 483 m/s. What is its average translational kinetic energy at that speed
A hydrogen atom has an angular momentum of 1.055x10^-34 kg.m^2/s. According to the Bohr model, what is the energy (eV) associated with this state
A plane electromagnetic wave of intensity 5.30 W/m2, moving in the x direction, strikes a small pocket mirror, of area 38.7 cm2, held in the yz plane. Find the force that the wave exerts on the mirror
A hypothetical neutral atom has 93 electrons and a nucleus of mass m = 2.23e-25 kg. Calculate the speed of orbit of this electron
A silver wire has resistivety p = 1.62x10^-8 ?m ana cross sectional area of 5.00 mm^2. what is the displacement current in the wire
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