Which of the following statements about the electric force between two charged objects is true? a. The strength of the electric force is not affected by how far apart the charges are.

b. As the charge gets larger, the strength of the electric force gets larger.

c. As the charges get larger, the strength of the electric force gets smaller.

d. As the distance between the charges decreases, the strength of the electric force gets smaller.

PLS HELP I WILL GIVE BRAINLIEST

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=