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A wire of initial length Lo and radius ro has measured resistance of 1.0 ?. The wire is drawn under tensile stress to a new uniform radius of r = 0.25ro. What is the new resistance of the wire?
The bullet penetrates into the block and stops due to its friction with the block. The compound system of the block plus the bullet rises to a height of 11 cm along a circular arc with a 20 cm radius A bullet with a m1 = 30.0 g mass is fired horizont..
You are to program a robotic arm on the assembly line to move in a xy-plane. Its first displacement is; its second displacement is, of magnitude 6.51 and direction 62.7 measured in the sense from +x-axis toward -y-axis. The resultant of the two displ..
A picture shows a charge A 1.00 m above the origin and has a charge of 5.00 X10^-9, Find the magnitude and direction of the electrostatic force on charge B.
You would like to balance a meter stick on your finger. The meter stick has a mass of m = 0.2 kg. (a) How far from the end should you place your finger to balance the stick? (b) Suppose two additional masses of M = 0.1 kg are placed at the positions ..
A solenoid is to be constructed that will have a resistance of 5.00 ohms and produce a magnetic field of 0.0400 T at its center when it carries a current of 4.00 A. The solenoid will be made of wire that is 0.500 mm in diameter and have a radius that..
A circular wire loop of radius 0.170 m carries a current of 9.00 mA, and is placed in a 50.0 mT magnetic field. What is the maximum magnitude of this torque
How far from the firing point is the height of the projectile.
Zach, whose mass is 55kg , is in an elevator descending at 14m/s. What is Zach's apparent weight while the elevator is braking
Two 8.0mm×8.0mm electrodes with a0.10-mm-thick sheet of Mylar between them are attached to a 9.0V battery. What is the charge before and after the Mylar is withdrawn
A piano tuner sounds two strings simultaneously. One has been previously tuned to vibrate at 292.0 Hz. The tuner hears 4.0 beats per second. What was the original frequency of the untuned string
A particular freely falling object requires 1.95 s to travel the last 33.5 m before it hits the ground. From what height above the ground did it fall.
An object is 32cm in front of a converging lens with a focal length of 6.9cm, Use ray tracing to determine the location of the image
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