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A waterfall is 87 meter high. If 20 percent of the gravitational potential energy of the water went into heating the water, find by how much would the temperature of the water, increase in going from the top of the falls to the bottom? [Hint: Consider a kilogram of water going over the falls.]
The drawing shows a collision between two pucks on an air-hockey table. Puck A has a mass of 0.036 kg and is moving along the x axis with a velocity of +5.5 m/s. It makes a collision with puck B, which has a mass of 0.056 kg and is initially at re..
Two point charges, q1= 2.40 nC and q2= -6.50 nC, are 0.100 m apart. Point A is midway between them; point B is 0.080 m from q1 and 0.060 m from q2 (see the attachment). Take the electric potential to be zero at infinity.
A large wheel-shaped space station, 120 m in diameter, Find the rotational frequency of the wheel
If a freight train can accelerate at 0.050 m/sec2, how far must it travel to increase its speed fro 2.0 to 8.0 m/sec?
A positive point charge q is fixed in position at the center of a square. A second point charge is fixed to corner B, C, or D. At which corner is the second charge located
question a straight line ab with slope passes through the point of intersection of two other straight lines whose
The hot resistance of a flashlight bulb is 1.90, and it is run by a 1.37-V alkaline cell having a 0.100-? internal resistance. 685A Calculate the power supplied to the bulb. in watts
An astronaut arrives at a new planet, and gets out his simple device to decide the gravitational acceleration there. Prior to this arrival, he noted that the radius of the planet was 7040 km. If his 0.400-m-long pendulum has a period of 1.0 s, what i..
In an elementary-particle experiment, a particle of mass m is red, with momentum mc, at a target particle of mass 2squrt (2m) . The two particles form a single new particle (completely inelastic collision).
suppose you take and hold a deep breath on a chilly day inhaling 1.0l of air at 0c and 1atm.ahow much heat must your
Consider a uniform thin rod of length 2.00 m and mass 1.00 kg is lying on a smooth horizontal table. How far does the center of mass of the rod travel during the time it takes to make one complete revolution
A block of weight 3.9N is launched up a 30%u2218inclined plane 2.35m long by a spring with k = 2.35 N/m and maximum compression 0.10m. How much kinetic energy does it have there
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