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How does an electroscope work? I have a homework problem that is asking me to sketch an arrangement of excess positive or negative charges in various regions on a picture of an electroscope (that is positiv charged) to show what happens to the charges on the electroscope as a charge rod is brought closer and the deflection of the needle charges.
A potter's wheel moves uniformly from rest to an angular speed of 0.23 rev/s in 35.0 s. Find its angular acceleration in radians per second
A concave mirror (R = 82.4 cm) is used to project a transparent slide onto a wall. The slide is located at a distance of 52.3 cm from the mirror, How far from the wall should the mirror be located
A car is travelling at 24 m/s while the driver spots a large pothole in the road a distance 35 m ahead. She immediately applies her brakes. If her acceleration is -4.30m/s2, does she manage to stop before reaching pothole? What is the stopping dis..
Two identical 1.3-kg blocks are connected by a massless string over a frictionless pulley of radius R = 15.000 cm and rotational inertia I = 0.004 kg m2, find the magnitude of the linear acceleration of the two blocks
In designing rotating space stations to provide for artificial-gravity environments, one of the constraints that must be considered is motion sickness. Studies have shown that the negative effects of motion sickness begin to appear when the rotati..
A 2.0 m conductor is formed into a square and placed in the horizontal xy-plane. What is the magnetic flux through the conductor
A guitar's E-string has length 64.9 cm and is stretched to a tension 84.6 N. It vibrates a fundamental frequency of 329.59 Hz. Determine the mass per unit length of the string
Along a straight road through town, there are three speed-limit signs. They occur in the following order: 54 , 35 , and 18 mi/h, with the 35 -mi/h sign located midway between the other two.
A metal ball with a mass of 2.97·10-6 kg and a charge of +4.91 mC has a kinetic energy of 6.81·108 J. how close will it come to the plane before stopping
Having captured a mouse, an owl is flying towards the barn where it lives to enjoy dinner. How much times passes before the mouse hits the ground
q1. suppose a uniformly charged with a linear charge density wire starts at point 0 and rises vertically along the
An elevator weighing 2500 N ascends at a constant speed of 8.0 m/s. How much power must the motor supply to do this?
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