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A metal rod A and a metal sphere B, on insulating stands, touch each other, They are originally neutral. A positively charged rod is brought near (but not touching) the far end of A. While the charged rod is still close, Aand B are separated. The charged rod is then withdrawn. Is the sphere then positively charged, negatively charged, or neutral?
Suppose a man's scalp hair grows at a rate of .31 mm per day. What is this growth rate in feet per week
2.0 kg of water at 14 C is mixed with 2.0 kg of water at 53 C in a well-insulated container. Estimate the net change in entropy of the system
A small steel ball bearing with a mass of 17.0 g is on a short compressed spring. When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.25 m. Calculate the horizontal distance the ball would travel
The power (in watts) dissipated by a resistor is given by P = IV. The resistors used in this experiment are 1 watt resistances i.e. they are capable of dissipating a maximum of 1 watt without overheating. What is the maximum voltage that can be put ..
In the figure, a 4.0 kg block slides along a track from one level to a higher level after passing through an intermediate valley. The track is frictionless until the block reaches the higher level. There a frictional force stops the block in a distan..
The focal length of a bi-convex lens is 10 cm. The focal length of a convex-concave thin lens is -20 cm. If placing them in parallel and in close contact, what is the compound focal length
The wheels of a wagon can be approximated as the combination of a thin outer hoop, of radius rh = 0.580 m and mass 4.89 kg, what should the radius of the disk be
must include free body diagrams with applications of newton's 2nd law 1) a 3.0 kg ball is attached to two pieces of string, compute the tension in the upper string
an electric toaster operating on 104.6 volts draw a current of 9.1 amps. what is the resistance of the toaster
An object of a mass 2.5kg accelerates from 2m/s to 10m/s in 10s. What was the net force acting on the object
A loop is pulled with a force F to the right to maintain a constant speed of 8.0 m/s. The loop has a length of 0.15 m, a width of 0.080 m, and a resistance of 200.0 ?. What is the induced current in the loop
A voltmeter is connected in parallel to a resistor when measuring Vi. Why is the measured voltage across a 10 M Ω resistor not equal to the voltage measured across a power supply?
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