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A 265 g ball is tied to a string. It is pulled to an angle of 6.8 ° and released to swing as a pendulum. A student with a stopwatch finds that 11 oscillations take 14 s.
A) How long is the string?
Express your answer to two significant figures and include the appropriate units.
A tank of water 3.0 m deep sits on a table 1m tall. A hole is located 2m from the bottom of the tank. Water flows out of hole and strikes the ground. Where does it strike the ground? Suppose incompressible, non viscous flow.
An L-R-C series circuit, R=150 ohms, L= 0.750H, and C= 1.70x10^-2uF. The source has a voltage amplitude of 140V, What is the average power delivered by the source
You are in a hot air balloon (yes, another balloon problem!) rising from the ground at a constant velocity of 2.10 m/s upward, How long does the cork remain in the air
The driver of a car wishes to pass a truck that is traveling at a constant speed of 20.9m/s . Initially, the car is also traveling at a speed 20.9m/s and its front bumper is a distance 23.1m behind the truck's rear bumper, What is the final speed ..
Which of the following statements is true for an elastic collision?
Two stationary positive point charges, charge 1 of magnitude 3.65nC and charge 2 of magnitude 1.75nC, are separated with a distance of 59.0cm. An electron is released from rest at the point midway among the two charges, and it moves along the line co..
A satellite is in a circular orbit 7900 km above the Earth's surface; i.e., it moves on a circular path under the influence of nothing but the Earth's gravity. Find the time it take to complete one orbit around the earth
A car starts from rest and moves with an acceleration of 1m/s for 1s. the motor is then turned off and the car is allowed to decelerate, Calculate the total distance traveled by the car
A heart defibrillator delivering 400 J of energy by discharging a capacitor initially at 10,000 V has a capacitance of 8.00 µF, What is the voltage of the second defibrillator
A bowling ball (mass = 7.2 kg, radius = 0.15 m) and a billiard ball (mass = 0.33 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other?
Two in-phase loudspeakers emit identical 1000 Hertz sound waves along the x-axis. Find what distance should one speaker be located behind the other for the sound to have an amplitude 1.90 times that of each speaker alone
A hollow cubical box is 4.09 m on an edge. This box is floating in a lake with one-third of its height beneath the surface. What is the depth of the water in the box at the instant the box begins to sink
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