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A small piece of dust of mass m = 1.4 µg travels during an electric air cleaner in which the electric field is 483 N/C. The electric force on the dust particle is equal to the weight of the particle.
1. What is the charge on the dust particle?
2. If this charge is provided with an excess of electrons, how many electrons does that correspond to?
A river has a steady speed of 0.350 m/s. A student swims upstream a distance of 1.00 km and swims back to the starting point. If the water were still, by how much would the trip be longer or shorter
A current of 2.0 A is flowing along the z-axis in the positive z direction from the origin to z=-2 m. Find the magnetic field, Which field is the strongest and Why
A CD has a mass of 16.2 g and a radius of 5.96 cm. When inserted into a player, determine the net torque acting on it
A block of 4.4 kg is held at the top of a smooth incline. The incline has height of 2.1 m and is at an angle of 19 degrees above the horizontal. How much work was done by friction on the block
Two sinusoidal waves of the same frequency travel in the same direction along a string. what is the amplitude (in cm) of the resultant wave
A simple pendulum consists of a ball connected to one end of a thin brass wire. find the change in the period of the heated pendulum
The crankshaft in a race car goes from rest to 3480 rpm in 2.7s. What is the crankshaft's angular acceleration
One particle has a mass of 4.41 x 10-3 kg and a charge of +6.92 ?C. A second particle has a mass of 6.52 x 10-3 kg and the same charge. The two particles are initially held in place and then released.
A 2100-kg truck traveling north at 41 km/hr turns east andaccelerates to 60 km/h. What is the change in the truck's kinetic energy
An ambulance with a siren emitting a whine at 1200 Hz overtakes and passes a cyclist pedaling a bike at 2.44 m/s, How fast is the ambulance moving
A uniform string of length is 2.5 m and mass 0.01 kg is placed under a tension 10N. What is the frequency of its fundamental mode?
a rotating flywheel can be used as a method to store energy. if it has 108105j of kinetic energy when rotating at 400
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