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

Your target variable is δf, the magnitude of the difference in frequency between the waves emitted from the sonar device and the waves received by the device after reflecting off the whale. write an expression for δf in terms of the relevant frequencies using the subscript notation introduced above.

What are similarities and differences between refraction, reflection, diffraction and absorption?

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?