Which of the following statements is true about our galaxy?

it contains one star.
it contains several stars.
it contains several thousand stars.
it contains billions of stars.

Atotal charge of –6.50 µc is uniformly distributed within a sphere that has a radius of 0.150 m. what is the magnitude and direction of the electric field at 0.300 m from the surface of the sphere? a) 2.89 × 105 n/c, radially inward b) 6.49 × 105 n/c, radially outward c) 4.69 × 105 n/c, radially inward d) 9.38 × 105 n/c, radially outward e) 1.30 × 106 n/c, radially inward

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

What properties of a moving object are used in determining the object's energy of motion