What type of waves do not require a physical medium?

a. Water waves

b. Sound waves

c. Electromagnetic waves

d. All waves require a physical medium.

At the Paris Peace Conference, President Wilson's program for peace a. angered the Russians. b. met no resistance among the Allies. c. was backed only by France. d. underwent several changes

During a blank change a system absorbs energy from its surroundings?

Which of the following would be useful to show the growth rate of plants at verying temperatures? A. bar graph B. frequency table C. circle graph D. line graph

A car travels 70 miles in 80 minutes. Which is its average speed per minute

Kinetic energy of motor cycle and rider is 60000 j if there total mass is 300 kg what is there speed

Two kids are on a merry-go-round that is turning at a constant rate. ariel is near the outer edge, and bob is closer to the center. ariel has answer (smaller, the same, or greater angular speed?

Visit this website and locate the element mercury, whose chemical symbol is Hg. Click on the square to read about the history, properties, and uses of mercury. Name three uses for mercury.

Ten seconds after starting from rest, a car is moving at 40 m/s. what is the car's acceleration in meters per second per second?

A student builds a simple circuit and a magnet under one of the circuit wires. When the switch is closed charges flow int the circuit and the wire moves

Cite an example in which a force is exerted on an object without doing work on the object