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Nobel laureate Richard Feynman (1918-1988) once said that if two persons stood at arm's length from each other and each person had 1% more electrons than protons, the force of repulsion between them would be enough to lift a "weight" equal to that of the entire Earth. Carry out an order-of-magnitude calculation to substantiate this assertion.
An electric grinding wheel of radius 0.50 m is initially at rest. When the motor is turned on at time t1=0s, What is the angular acceleration of the wheel during the first 2.1s of its motion
A 1060-kg van, stopped at a traffic light, is hit directly in the rear by a 794-kg car traveling with a velocity of +3.90 m/s. determine the final velocity of the car and the van
A 7.90×10-2-{rm kg} toy airplane is tied to the ceiling with a string. While the airplane's motor is started, it moves with a constant speed of 1.20m/s in a horizontal circle of radius 0.50m.
A 12-inch cast iron water pipe that has been in service for 50 years is found to have extensive corrosion inside. How these conditions would affect friction losses in the pipe describe it.
A balloon contains 10 lbs of Helium at a temperature of 70 ?F. If the volume of the balloon is 300 ft3, what is the pressure of the balloon
A 790-kg object and an 889-kg object are separated by 11.0 m. At what position (from the less massive object) can the 260-kg object be placed so as to experience a net force of 10 N towards the less massive object.
question a at room temperature what is the strength of the electric field in a 12-gauge copper wire diameter 2.05 mm
A firecracker in a coconut blows the coconut into three pieces. Two pieces of equal mass fly off south and west, What is the speed of the third piece
this simulation can be downloaded from granthams website under ph220.simulations its file name is ball on roller cstr
A very small charged block with a mass of 2.35 g is placed on an insulated, frictionless plane inclined at an angle of 17.0° with respect to the horizontal, find the sign and magnitude of the charge on the block
A 2.50 g bullet, traveling at a speed of 465 m/s, strikes the wooden block of a ballistic pendulum. The block has a mass of 275 g. What is the speed of the bullet/block combination immediately after collision.
consider the function fx cosbsqrt of x where b 6.28 cm-0.5.a argue that this wave has crests at x0.1 cm 4cm 9cm and so
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