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A 30-kg girl and a 25-kg boy face each other on friction-freeroller skates. The girl pushes the boy, who moves away at aspeed of 2.0 m/s. What is the girl's speed?
The wire is located in a uniform magnetic field B directed perpendicular to the wire. Compute the magnitude of B when the force on the wire due to B is 0.200 N.
a power plant burns coal and generates an average of 660.0 megawatts mw of electrical power while discharging 990.00 mw
Describe what quantity shows the measurements are consistent with a large amount of dark matter:
You have a concave spherical mirror with a 13.3-cm radius of curvature. You place an object on the mirror's axis, 19.7 cm in front of the mirror
How long would it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if the elevation change is 324.
two satellites with equal rest masses of 100 kg are traveling toward each other in deep space. they have identical
A 12 kg- hammer strikes a nail at a velocity of 8.5m/s and comes to rest in a time interval of 7.7 m/s. What is the average force acting on the nail
1.describe at least two possible challengesproblems that you may encounter when you are characterizing a watershed
A laser used in a holography experiment has an average output power of 5.25 mW. Calculate the energy (in joules) radiated with each pulse
An open tank is filled with gasoline to a height of 4.5 m from the bottom. A hole of diameter 2.4cm is at the bottom of the tank. How fast is the seepage? How many cubic meters of gasoline is wasted per second?
A 1200 kg ore cart is rolling at 10.8 m/s across a flat surface. A crane dumps 691 kg of ore (vertically) into the cart. How fast does the cart move after being loaded with ore
An electron experiences the greatest force as it travels 1.02*10^6 m/s in a magnetic field when it is moving horizontally. The force is upward and of magnitude 1.75*10^-12 N. What is the magnitude of the magnetic field?
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