Which of the following correctly describes electromagnetic waves? A. transverse waves
B. Longitudinal waves
C. Have a constant wavelength
D. Need a medium to transfer energy

Aforce of 200 n is applied to an input piston of cross-sectional area 2 sq. cm pushing it downward 2.8 cm. how far does the output piston of cross-sectional area 12 sq. cm move upward? show all work.

Emagnitude of the electrical force acting between a +2.4 ×  10–8  c charge and a +1.8 ×  10–6  c charge that are separated by 0.008 m is    n, rounded to the tenths place.

Use 4 to 5 complete sentences, explain the concepts of beats and how beats are produces.