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A potential difference of 120 V produces a current of 8.0 A in the heating element of a toaster. What is the resistance of this heating element while the toaster is carrying this current?
A 15-g ball is shot from a spring gun whose spring has a force constant of 600N/m. The spring can be compressed 5 cm. How high can the ball be shot if the gun is aimed vertically
Mike is riding his unicycle of wheel diameter 20 in. Mike rides for 30 m with an initial angular velocity of 0.75 rad/s, What is the unicycle's linear velocity at 30 m?
A charge Q is transferred from an initially uncharged plastic ball to an identical ball 11cm away. The force of attraction is then 19mN. How many electrons were transferred from one ball to the othe
A concrete highway is built of slabs 14m long (20 degrees Celsius). How wide should the expansion cracks between the slabs be
A thin film of glass (n = 1.50) floats on a liquid of n = 1.35and is illuminated by light of a wavelength = 580nm incidentfrom air above it. Find the minimum thickness of the glass
One gallon of gasoline contains 3.1 107 calories of potential energy that are released during combustion. what is the average force produced by the gasoline
What was the average acceleration throughout the trip
A block of weight 4.5 N is at rest on a horizontal table. An upward vertical force of 2.2 N is applied to the block by means of a string. What is the magnitude of the force exerted by the block
A cannon fires up at an angle of 30 degrees above the horzontal with a muzzle velocity of 40 m/s. How far from the base of the wall dos the cannon ball travel
Find the total number of lines in a 3.0cm -wide diffraction grating whose third-order spectrum has the 660nm hydrogen theta spectral line at an angular position of 41degree celcius.
Three point charges -q,-q, and 2q occupy the verices of an equilateral triangleof side a. Find the electric field at the center of the triangle
A 22.5 g bullet is fired from a rifle. It takes 2.60 10-3 s for the bullet to travel the length of the barrel, find the average net force exerted on the bullet
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