A boy whirls a ball on a string in a horizontal circle of radius 0.6 m. If the ball is traveling at 9 m/s, what is the centripetal acceleration? a)135 m/s2
b)62.5 m/s2
c)72 m/s2
d)90 m/s2
e)24 m/s2

High schoolphysics 5+3 pts a neon light consists of a glass tube with metal wires at each end. when connected to a high-voltage source, the gas glows. if a fly lands on the glass tube, what will most likely happen? a) the fly will not feel a shock because the glass conducts any free electrons back into the gas. b) electrons will flow directly from the metal wires along the glass and shock the fly. c) the fly will not feel a shock because the glass insulates it from the electrons in the gas and the metal. d) electrons that are moving through the gas will be conducted through the glass and shock the fly.

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c