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After landing on an unfamiliar planet, a space explorer constructs a simple pendulum of length 50.0cm. The explorer finds that the pendulum completes 109 full swing cycles in a time of 137 s.
What is the magnitude of the gravitational acceleration on this planet?
In an open manometer filled with mercury (densty = 13600 kg ? m3 ), the level of mercury column in the air side is 0.09 m higher than that in the gas side
A 180g block hangs from a spring with spring constant 13N/m . At t=0s the block is 13cm below the equilibrium point, What is the block's oscillation frequency
A spring with a spring constant 15.0 N/m hangs from the ceiling. A 300g ball is attached to the spring and allowed to come to rest, What is the amplitude f oscillations after 2.0 minutes
Five seconds later, the police officer leaves on her motorcycle, starts her stopwatch, and accelerates at 2 m/s^2 toward the car. According to her stopwatch, how many seconds until she catches the car
Two converging lenses, each of focal length 14.5 cm, are placed 39.1 cm apart, and an object is placed 29.2 cm in front of the first. What is the magnifcation of the system
High-voltage power lines are a familiar sight throughout the country, What is the resistance of 15 kilometers of this wire
A force vector has a magnitude of 590 newtons and points at an angle 44o of below the positive x axis. What is (a) x scalar component and (b) y scalar component of the vector.
A dc motor with its rotor and filed coils connected in series has an internal resistance of 3.2 ?. What is the power delivered to the motor
Write down an energy transformation equation
A 378 N, uniform, 1.56 m bar is suspended horizontally by two vertical cables at each end. Cable A can support a maximum tension of 502.0 N without breaking, and cable B can support up to 397.0N. You want to place a small weight on this bar. What is ..
An arrow is shot at an angle of θ=45° above the horizontal.
A student (m= 75 kg) falls freely from rest and strikes the ground. throughout the collision with ground, he comes to rest in a time of 0.040 s. the average force exerted on him by the ground is +18 000 N.
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