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A pendulum of length L with a bob of mass m swings back and forth. At the low point of its motion (point Q), the tension in the string is (3/2)mg. What is the speed of the bob at this point?
A railroad car of mass 3.3 104 kg moving at 4.50 m/s collides and couples with two coupled railroad cars, What is the speed of the three coupled cars after the collision
A wrecking ball (weight = 4400 N)is supported by a boom, which might be assumed to be uniform and has a weight of 3000 N. As the drawing shows, a support cable runs from the top of the boom to the tractor.
Now assume that Soft Lens is able to enter into restrictive licensing agreements with potential competitors and create an effective cartel in the industry. If demand and cost conditions remain constant, what is the cartel price/ output and profit ..
A 9.0 kg dog takes a nap in a canoe and wakes up to find the canoe has drifted out onto the lake but now is stationary. What is the mass of the canoe
At its highest temperature, a space heater has a resistance of 35.5 Ω when it is plugged into a wall outlet supplying a peak voltage of 162.6 V sinusoidally at 60 Hz
Through 5 successive 1.04 min intervals, a runner moves at the following constant speeds: 0.405 km/min, 0.220 km/min, 0.160 km/min, 0.163 km/min, and 0.323 km/min. compute the total distance travelled and average speed.
er beam with wavelength ? = 6328 Å is incident normal to the plane of a diffraction grating. find the distance between the two first-order maxima in the pattern
Find the average horizontal force exerted by the ground on the feet of a sprinter of mass 44.1 kg who accelerates from rest to a speed of 12.4 m/s in a time interval of 1.00 s
a charge of -5.0 mc is rigidly held on the x-axis at x 4.3 m. find the work in joules done bringing a -10.0 mc
You are researching personal watercraft (PWC) safety. These vehicles have a well known safety issue in which the rider loses steering control when there is no thrust from the engine. What is the distance covered in that time
A box that is 3.9m x 2.5m x 4.5m is filled with 180 balloons each balloon is filled with .00011309733552923 cm3 of helium, What is the mean free path of the balloon
A 1.7nF parallel-plate capacitor has an air gap among its plates. Its capacitance increases by 3.0nF when the gap is full by a dielectric. What is the dielectric constant of that dielectric?
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