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A boy and a girl are balanced on a massless seesaw. The boy has a mass of 75 kg and the girls mass is 50 kg. If the boy sits 2.0 meters from the pivot point on one side of the seesaw, where must the girl sit on the other side?
A charge Q is uniformly distributed around a thin plastic ring with radius R lying in a yz plane with the ring center at the origin. A point charge with value q is located on the x axis at point x1.
In the absence of air resistance, a projectile is launched from andreturns to ground level. It follows a trajectory similar to that inthe figure below and has a range of 19 m.Suppose the launch speed is doubled, and the projectile is fired atthe same..
A pendulum of length 1.00 m swings in a vertical plane. Whenthe pendulum is in the two horizontal positions Θ =90 andΘ =270, its speed is 5.00 m/s. find the magnitude and direction of the total acceleration
A fire truck has a siren with that generates a sound with a frequency of 8562 Hz. what frequency will you observe
A 40 kg box is sliding down a ramp angled at 15 degrees down from the horizontal. find the force of friction between the box and the ramp
The current through two identical light bulbs connected in series is 0.25 amps. The voltage across both bulbs is 100 volts. Find the resistance of a single light bulb.
you need to determine the density of an unknown liquid. to this end you perform an experiment with a block and notice that the block floats in this unknown liquid with 4.6 cm of its side submerged. determine the density of the unknown liquid
For no apparent reason, a poodle is running at a constant speed of 6.00 m/s in a circle with radius 2.9 m. Let v1 be the velocity vector at time t1 , and let V2 be the velocity vector at time t2 . Consider (change in v)=v2-v1 and (change in t)=t2-..
The kinetic energy of a proton is 80% of its total energy. What is the momentum in kg·m/s of the proton?
A person drops a cylindrical steel bar (Y = 1.70 × 1011 Pa) from a height of 4.70 m, what is the maximum compression of the bar
An engine has a hot reservoir temperature of 969 K and a cold reservoir temperature of 602 K. The engine operates at two-fifths maximum efficiency. What is the efficiency of the engine?
the absolute portential at the exact center of a square is 3.0v when a charge of +Q is located at one of the squares corners. What is the absolute potential at the squares center
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