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A car moving at 10 m/s crashes into a barrier and stops in 0.50s. There is a 20kg child in the car. Suppose that the child's velocity is changed by the same amount as the cars in the same time period.
A string of 22 identical Christmas tree lights are connected in series to a 125 V source. The string dissipates 52 W. What is the comparable resistance of the light string.
An AA battery is connected to a parallel-plate capacitor having 4 diameter plates spaced 3 apart. How much charge does the battery move from one plate to the other.
An emf is induced in a conductin loop of wire 1.03 m long as its shape is changed from square to circular. Find the average magnitude of the induced emf if change in shape occurs in 4.15s and the local 0.131-T magnetic field is vertical to the pla..
A pipe open only at one end has a fundamental frequency of 214 Hz. A second pipe, initially identical to first pipe, is shortened by cutting off the portion of the open end. Now, as both pipes vibrate at their fundamental frequencies, the beat freque..
A car takes 11 s to go from v = 0 to v = 80 m/s at about constant acceleration. If you wish to find the distance travelled using the equation d = 1/2 at2, what value must you use for a.
Rhea, one of Saturn's moons, has a radius of 765 km and an acceleration due to gravity of 0.278 m/s2 at its surface. Calculate its mass and average density.
when jim abd rob ride bicycles, jim can only accelerate at three quarters the acceleration of Rob. Both start from rest at the bottom of a long straight road with constant upward slope. If rob takes 5.7 minutes to react the top, how much earlier s..
At the instant of engine burnout, the rocket has risen to 52 m and acquired a velocity of 40 m/s. The rocket continues to rise in unpowered flight, reaches most height and falls back to the ground.
A car travelling at 37 {rm m/s} runs out of gas while travelling up a 7.0{rm ^ {circ}} slope. How far would it coast before starting to roll back down.
A tuning fork vibrating at 666 Hz falls from rest and accelerates at 9.8 m/s 2. How far below point of release is the tuning fork when waves of frequency 626.4 Hz reach the release point? The speed of sound in air is 339 m/s.
Assuming that the depth of Earth's atmosphere is 100.0 km, what is the total charge incident on the atmosphere in 177.0 s? Assume that the radius of the surface of the Earth is 6378. km.
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