Which of the following is trueregarding the properties of light?
a. light can only travel in a straight line.
b. light has a dual nature and acts like both a wave and a particle.
c. light is not able to display interference or diffraction.
d. light needs a medium to propagate through a vacuum.

Write a question about how changing temperature affects the gas inside the sports ball

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.

The ph is the a.independent variable b.the dependent variable c.control group