When a wave enters a new medium, it

may speed up or slow down. What

other properties of the wave do you

think might change when it enters a

new medium?

If a material contains 3 elements joined in a fixed proportion it is an

What were the reactants of the first experiment in the video?

A girl is sitting in a sled sliding horizontally along some snow (there is friction present). The mass of the girl is 29.8 kg and the mass of the sled is 10.3 kg. The force of friction acting on the sled as it slides is - 123 N.

Explain how the color of a star is related to its temperature

Whats more difficult to compress oxygen water brick or salt water

The period of a 440 Hertz sound wave is __ seconds. 1/440 1/220 220 440

Match the term to the correct description. ~A type of circuit where part of the loop is broken. ~The flow of electrons. ~A loop that creates a pathway for electricity to follow. ~A type of circuit with only one path for the electricity to follow.

What is the mass of an object that is accelerating at 10 m/s^2 when a force of 2,386 N is exerted

According to the U. S. Green Building Council, what percentage of the world's energy use and greenhouse gas emissions can be attributed to buildings?

Magnets are often fitted to the doors of refrigerators and cupboards WHY?