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An electron is moving in a plane with a long straight current carrying wire. The electron is heading at a 45 angle directly toward the wire when it is 50cm away; the electron reaches only as close as 1.0 cm, before being repelled away, always moving in the same plane. If the electron has an initail speed of 3.4 x 10^6 m/s, determine
(a) the current in the wire?
(b) the speed of the electron at its point of closest approach?
The water in a atank is at a gauge pressure of 190,000 Pa. what is the force on the bottom of the tank
A 54.1-kg ice skater is moving at 4.09 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole, Compare this force with her weight by finding the ratio of the force to her weight
A person scffing her feet on a wool rug on a dry day accumulates a net charge of -95uC. How many excess elecvtrons does she get
An asteroid is discovered to have a tiny moon that orbits it in a circular path at a distance of 115 km and with a period of 49.0 h. Find the escape velocity from the asteroid
Two plates of area 743 cm^2 each are separated by a distance 52.3 cm. Calculate the capacitance of the capacitor in microfarads
A ball is fired at an angle of 45 degrees from ground level in the absence of air resistance. If the maximum range is 27m then what is its inital speed and what is the time of flight
An astronaut on the Moon fires a projectile from a launcher ona level surface so as to get the maximum range. what is the range of the projectile
A sinusoidal current i= Icoswt has an rms value of I rms = 2.20 A. What is the current amplitude, What is the rectified average current
A 300kg piano is being lowered into position by a crane while two people steady it with ropes pulling to the sides. What is the tension in the vertical main cable supporting the piano
A small, spherical bead of mass 3.05 g is released from rest at t = 0 in a bottle of liquid shampoo. The terminal speed is observed to be vT = 1.80 cm/s. Find the value of the resistive force when the bead reaches terminal speed
A 2700 kg truck traveling north at 42 km/h turns east and accelerates to 53 km/h. What is the change in the truck's kinetic energy
An airplane flying upward at 35.3 m/s and an angle of 30.0° relative to the horizontal releases a ball when it is 255 m above the ground. find the time of it takes the ball to hit the ground
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