Do sound waves must have a medium to travel but elctromagnetic waves cannot

A trough is 3 meters long, 2 meters wide, and 4 meters deep. The vertical cross-section of the trough parallel to an end is shaped like an isoceles triangle (with height 4 meters, and base, on top, of length 2 meters).

A current in a wire increases from 2 A to 6 A. How will the magnetic field 0.01 m from the wire change? A) It increases to four times its original value. B) It increases to three times its original value.

How many neutrons does carbon have

Why is "Creation-Science" not considered true science?

Which of the following nations had a command economy?

What did Issac Newton think he could describe?

Which two states share the property of changing shape in different containers? A. Liquids and gases B. Gases and solids C. Solids and liquids D. Solids and plasmas

Which type of soil is the most permeable? A. sand B. silt C. loam D. clay

If your mass is 20kg, and you stand on the scale (witch is your force), and the acceleration due to gravity is10m/s^2, what does the scale says your weight is?

Which statement best describes the movement of particles when a wave travels through a medium? The particles are