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Q1. The electric motor of a model train accelerates the train from rest to 0.580 m/s in 33.0 ms. the total mass of the train is 563 g. Find out the average power delivered to the train during its acceleration. The units need to W for the final answer.
Q2. What is the magnitude of the total electrostatic energy of the ?nal 5 charge system? It may be useful to consider symmetry property of the charge distribution that leads to cancellations among several terms.
A 260 wooden raft floats on a lake. When an 80 man stands on the raft, it sinks 5.0 deeper into the water. When he steps off, the raft vibrates for a while. What is the frequency of vibration.
An electric field is set up between two parallel plates, each of area 2.2 m2, by putting 1.0 C charge on one plate and the -1.0 C charge on the other. The plates are separated by 4.0 mm. What is the magnitude of the electric field between the plates ..
The cannonball is fired at a speed of 53.0 and an angle of 31 above horizontal. A cannonball that was accidentally dropped hits the moat below in 1.40. How far from the castle wall does the cannonball hit ground.
In a game of basketball, a forward makes a bounce pass to the center. The ball is thrown with an initial speed of 2.50 m/s at an angle of 15.5° above the horizontal. It is released 0.73 m above the floor. What horizontal distance does the ball cover ..
A dare devil is shot out of a cannon at 45.0 degrees to the horizontal with an initial speed of 25.0 m/s. A net is positioned a horizontal distance of 50.0 m from the cannon.
A particle travels counter clockwise around the origin at constant speed in the circular path that has a diameter of 2.50 m, going around twice per second. Point Q is on the path halfway between points P and R that lie on the x axis and the y axis..
The total force on a one foot wide section of the inclined portion of the wall and the location and line of action of the resultant force.
How much time elapses between first splash and second splash
A jeweler working with a heated 43 gram gold ring must lower the ring's temperature t make it safe to handle. If the ring is initially at 94 degrees Celsius, what mass of water at 22 degrees Celsius is necessary to lower the ring's temperature to 38 ..
A professor's office door is 0.80 wide, 3.0 high, and 5.0 thick; has the mass of 25; and pivots on frictionless hinges. A "door closer" is attached to the door and the top of door frame.
What effect will increase in temperature from 25 degree Celsius to 32 degree Celsius of the metal metre stick have on the measurement of the dimension of rectangular block? Why are corrections not generally essential for this effect.
Calculate the intensity distribution
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