A laser beam has intensity I₀.

a. What is the intensity, in terms of I₀, if a lens focuses the laser beam to 1/10 its initial diameter?

b. What is the intensity, in terms of l₀, if a lens defocuses the laser beam to 10 times its initial diameter?

What should the power status of a circuit be when measuring resistance with an ohmmeter?

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

One object has a mass of 1 kg and another object has a mass of 3 kg. if the speeds are the same, which of the following is true about their kinetic energy?