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The electron density on the surface of a circular disc of radius 20 m is given as ne = 300ρ cos2 φ electrons/meter2. Determine the number of electrons residing on the surface of the disc. What is the total charge on the disc?
A child is twirling a 0.0120 kg ball on a string in ahorizontal circle whose radius is 0.100 m. The ball travelsonce around the circule in 0.500 s. determine the centripetal force acting on the ball
The coefficient of volume expansion of olive oil is 0.68 × 10-3 K-1. A 1-liter glass beaker is filled to the brim with olive oil at room temperature. What is the coefficient of linear expansion of glass
Four identical charges (+2uC each) are brought from infinity and fixed to a straight line. The charges are located .4 m apart. Determine the electric potential energy of this group.
A bicyclist is heading east at 6.6 m/s for 2.5 minutes when she realizes she left her cell phone in her apartment. What is her average speed and velocity for the round trip
A cube of solid aluminum has a volume of 1.00 m3 at 20 degree Celsius. Find what temperature change is required to produce a 130 cm3 increase in the volume of the cube
A 1296.0 gram mass is on a horizontal surface with mk = 0.42, and is in contact with a mass less spring with a force constant of 526.0 N/m which is compressed. Find the velocity of the mass as it loses contact with the spring
An airplane flies due west at a velocity of 645 kilometres per hour (km/h). The wind blows from the north at a velocity of 125 kilometres per hour (km/h). Find the plane resultant velocity?
Transcranial magnetic stimulation (TMS) is a noninvasive technique used to stimulate regions of the human brain. Determine the induced emf within a circle of tissue of radius 1.9 mm
A diverging lens with a focal length of -14 cm is placed 10 cm to the right of a converging lens with a focal length of 18 cm. An object is placed 32 cm to the left of the converging lens.
ships a and b leave port together. for the next two hours ship a travels at 15.0 mph in a direction 35.0 west of north
I am confused as to whether or not this is a trick question Two metal strips are brought together until their edges are separated by a small distance, What changes would you expect to observe
A 1500 kg vehicle is making a circular turn on a flat roadway. What is the max speed the vehicle can travel before it starts to slide
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