Hl Charles de Coulomb measured attractive and repulsive forces caused by charged
objects. Which statement is true about the electromagnetic force? *
•Only the charge of one object that is interacting with another chargedobject affects the
electromagnetic force between the two objects.
•The distance between two charged objects has no effect on the electromagnetic force
between the two objects.
•The charge between two charged objects has no effect on the electromagnetic force
between the two objects.
•The charge and distance between two charged objects both influence the
electromagnetic force between the two objects.

Which law represents the thermodynamic statement of the conservation of energy of a system? a. the fourth law b. the first law c. the second law d. the third law

Athin plate moves between two parallel, horizontal, stationary flat surfaces at a constant velocity of v = 7.5 m/s. the two stationary surfaces are spaced 4 cm apart, and the medium between them is filled with oil whose viscosity is 0.9 n·s/m2. the part of the plate immersed in oil at any given time is 2 m long and 0.5 m wide. if the plate moves through the mid-plane between the surfaces, determine the force required to maintain this motion. what would your response be if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top surface (h1)? if the plate moves through the mid-plane between the surfaces, the force required to maintain the motion will be n. if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top (h1) surface, the force required to maintain the motion would be n.

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?