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a.) Calculate the number of electrons in a steel iron pinhead. The pinhead may be assumed to be spherical with a diameter 2mm.
b.) How many electrons would have to be added to the pin until it has a net negative charge of 1.00mC.
A golf ball is dropped from rest from a height of 9.50 m. It hits the pavement, then bounces back up, rising just 5.50 m before falling back down again. A boy then catches the ball when it is 1.30 m above the pavement. Ignoring air resistance, cal..
If a metric ton is 1 x10^3 kg, how many 88 kg people can safely occupy an elevator that can hold a maximum mass of exactly 1 metric ton.
How many liters of gasoline would give the same mechanical energy given that each liter provides 8.50x10^6 J of mechanical energy.
what is the force per meter on a lightning bolt at the equator that carries 20,000 amps perpendicular to the earths's 3.00 x 10^3 T field
A large block of copper initially at 20.0oC is placed in vat of hot water (80.0oC). For the first 1.0 J of heat that flows from the water into the block, find the entropy change of the block
Suppose you have a near-point distance of 16 cm. The angular resolution of the eye is determined by diffraction, What is the smallest object your bare eye can resolve
A flight attendant pulls her 63N flight bag a distance of 308m along a level airport floor at a constant velocity. The force she exerts is 45N at an angle of 57° above horizontal. Find the work she does on flight bag.
A 4.0 uF capacitor is initially uncharged and connnected in series with a 4.0 kQ reisitor. How long will it take for the capacitor to reach one fourth of this maximum charge
If you place the box on a dolly of mass 4.7 and with coefficient of rolling friction 2.0×10−2, illustrate what horizontal acceleration would that 154 force provide?
Two long, parallel wires are separated by a distance of 2.1 cm. What is the current in the second wire? Express the answer with two decimal places
An elevator cable can withstand a maximum tension of 19,500N before breaking. The elevator has a mass of 480 kg and a maximum acceleration of 2.24 m/s2. Engineering safety standards require that the cable tension never exceed two-thirds of the breaki..
Three capacitors, C1, C2 = 2C1 and C3 = 3C1 are connected in parallel to a voltage source of value V. What is the voltage across each capacitor when all three switches are closed
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