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A charged styrofoam ball of mass 100g hangs motionless from a string that makes and angle 10 degrees with respect to vertical. The inclination of the string is due to a horizontal electric force on the ball. Find the magnitude of this force.
a race car travels around a circuit at a constant speed of 45 m/s. it first heads East for 1min, then SOuth for 1 min, how far does the car drive
An object is suspended on a frictionless inclined plane by a rope parallel to the incline, as illustrated above. what is the weight of the object
A possible means of spaceflight is to place a perfectly reflecting aluminized sheet into Earth orbit and use the light from the sun to push this solar sail. what would be the force exerted on the sail
an electric current of 1.00 A is flowing through a copper filament diameter 1.00 mm, calculate the average electron velocity v and the ?- factor, the positive and negative charge densities in the S' frame
a sewing machine needle moves up and down in simple harmonic motion with an amplitude of 1.27cm and a frequency of 2.55Hz. what is the maximum acceleration of the needle
Calculate the magnetic force per meter between two such lightning bolts separated by 10 meters. (This is mainly to give a feeling for the strength of the magnetic field)
A 1.9cm × 1.9cm × 1.9cm box with its edgesaligned with the xyz-axes is in the electric field E? =(360x+150)i^N/C, where x is in meters
A nurse measures the temperature of a patient to be 39.3°C. What is this temperature on the Fahrenheit scale
A stone is thrown upward with an initial velocity of 6 m/s. What maximum height will the stone reach
A 2100 kg car moving east at 10 m/s collides with a 3000 kg car moving north. The cars stick together and move as a unit after the collision, at an angle of 35 ° north of east and at a speed of 5.03 m/s. Find the speed of the 3000 kg car before th..
What is the minimum frequency of light needed to free an electron from a neon nucleus when the electron is in its lowest energy level n=1
Find the minimum aperture diameter of a camera that can resolve detail on the ground the size of a person (1.5m ) from an SR-71
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