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In the rectangle in the drawing, a charge is to be placed at the empty corner to make the net force on the charge at corner A point along the vertical direction. What charge (algebraic and magnitude sign) should be placed at the empty corner?
A silicon sample is doped with phosphorus at 1.23 parts per million. Phosphorus acts as an electron donor, Calculate the number of free electrons per unit volume of the doped silicon.
q. a speed ramp at an airport is basically a large conveyor belt on which you can stand and be moved along. the belt of
The weight of the car is 14 kN. You know three points on the plane, What is the force of friction (Ff=?).
A 4.3kg fishbowl sits on a smooth level table, with a coefficient of static friction between the bowl and the table vs=.17. if you wish to push the bowl sideways (applying force parallel to the tabletop) how much force do you have to apply to caus..
Three 45-? lightbulbs and three 70-? lightbulbs are connected in series. What is the total resistance of the circuit
An auto race takes place on a circular track. A car completes one lap in a time of 19.5 s, Find the average angular speed and the radius of the track
The reason of a banked curve is to allow vehicles tomaneuver during the turn without relying on static tire friction to remain on the curve. An accident investigator is trying to decide whether or not a highway clover leaf on-ramp speed limit sign is..
A krypton laser produces a cylindrical red laser beam 3mm in diameter with 4W of power. What is the light intensity on a wall 5.0 m away from the laser.
a to a closed system we add 28 kj of heat while its internal energy decreases by 24 kj. how much work do we gain or
A van travels due east with a speed of 55.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. Determine the velocity of the rain with respect to the van
In the 1850s, Armand Fizeau and Jean-Bernard-Leon Foucault made the first measurements of the speed of light in water. calculate the wavelength of yellow green light in water
Given an oildroplet with a mass of 7.59e-7 kg and a density of 952 kg/m^3 that spreads out to form a circle with a radius of 42.2 cm on the water surface, what is the approximate diameter of an oil molecule
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