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Question: If a charged oil droplet of density ρ = 0.92gcm-3 and radius a = 2 μm is just balanced against gravity's pull by an electric field of 1.9 ×106 V/m, what is the charge on the droplet? Give your answer in multiples of the elementary charge e.
A circularwire loop of radius 20.0 cm carries acurrent of 2.90 A. It is placed sothat the normal to its plane makes an angle of 50.0° with a uniform magnetic field of14.0 T. Calculate the magnetic dipole moment of the loop
An engineer is designing a runway for a new airport. Of the planes which will use the airport, the lowest acceleration rate will be 3 m/s2. Assuming the minimum acceleration, what is the minimum allowed length for the runway
a particle of mass 0.350 kg is attached to the 100 cm mark of a meter stick of mass 0.150 kg. the meter stick rotates
Illustrate what is the coefficient of static friction between the chair and the floor? What is the coefficient of kinetic friction between the chair and the floor?
the nickel-metal hydride battery in your cell phone has a 1.2-v emf and it can be recharged about 1000 times.
A vacuum cleaner is plugged into a 120.0-V socket and uses 4.1 A of current in normal operation, Find the coil resistance of the motor
Coherent light is passed through two narrow slits whose separation is 39.5 mirometers. what must the kinetic energy (in electron volts) of the electrons be
A patio swing is suspended by two springs, each of which has a force constant of 465 N/m, Find the mass of a person sitting on the swing oscillating up and down at a frequency of 0.515 Hz
A fan blade is revolving at 20 cycles/s when someone turns off the fan. How long will it take for the fan blade to come to rest
Two small spheres spaced 20.0 cm apart have equal charge. How many excess electrons must be present on each sphere
wheel rotating about a fixed axis has an angular position given by , where q = 3 - 2t^3 tis measured in radians and t in seconds
A highway curve has a radius of 0.14 km and is unbanked. A car weighing 12 kN goes around the curve at a speed of24 m/s without slipping. What is the magnitude of the horizontal force of the road on the car?
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