Refraction:

a. causes light to "bounce off a surface

b. causes blueshift

c. is caused by light moving through different substances

d. is caused by the source of the waves moving closer to the receiver

e. is caused by light moving around a corner

A baseball sitting on the roof of the stadium has 60 J of potential energy. A pigeon lands on the baseball and knocks it off.

Which of the following is NOT a health benefit of exercise? A. higher blood pressure B. build muscle C. burns fat

A car travels in a straight line along a road. Its distance x from a stop sign is given as a function of time t by the equation x (t) = 9t^2-8t^3 m. Find the acceleration (in m/s/s) of the car at t = 4.6 s. Give answer with two decimal places.

In order to make an electric current flow it is necessary to have

A therapist challenges her client to journal daily as a part of her treatment plan. The therapist offers her client a new music download if she meets this challenge for one week.

After creating a question and forming a hypothesis, what is the next step in the scientific method

Roger sees water balloons fall past his window. He notices that each balloon strikes the sidewalk 0.51 s after passing his window. Roger's room is on the second floor, 10 m above the sidewalk.

Which statements accurately describe the Doppler effect?

Describe how mass and distance affect gravitational force.

a bike can climb the inclined road at uniform speed of 72 km/hr by applying force 500N what will be the power applied by the bike?