An insulating sphere with of radius of R = 5.10 cm carries 3.72×10-9 C of electric charge. The electric charge is distributed uniformly throughout the volume of the sphere. Determine the magnitude of the electric field at a point 2.20 cm away from the center of the sphere.

The softest and hardest minerals are: softest hardest

A15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25°c to 175°c. what is the specific heat capacity of iron?

You are driving to the grocery store at 20 m/s. you are 110m from an intersection when the traffic light turns red. assume that your reaction time is 0.50s and that your car brakes with constant acceleration. how far are you from the intersection when you begin to apply the brakes? what acceleration will bring you to rest right at the intersection? how long does it take you to stop after the light changes? the known values: vi=20m/s xi=110m t=.50s vf=0m/s xf=0m a=?