At a certain point between earth and the moon, the net gravitational force exerted on an object by earth and the moon is zero. the earth-moon centre-to-centre seperation is 3.84 x 10^5 km. the mass of the moon is 1.2% the mass of earth . a) where is this point located? are there any other such points? . b) what is the physical meaning of the root of the quadratic equation whose value exceeds the earth-moon distance?

Apositive rod is placed to the left of sphere a, and the spheres are separated. which best describes the spheres? sphere a is negative and sphere b is positive because protons from sphere a are attracted to the rod and move to sphere b. sphere a is negative and sphere b is positive because electrons from sphere b are attracted to the rod and move to sphere a. sphere a is positive and sphere b is negative because electrons from the rod move to sphere b and protons then move to sphere a. sphere a is positive and sphere b is negative because protons move from sphere b to the rod and also to sphere a.

When applying kirchhoff's rules, one of the essential steps is to mark each resistor with plus and minus signs to label how the electric potential changes from one end of the resistor to the other. the circuit in the drawing contains four resistors, each marked with the associated plus and minus signs. however, one resistor is marked incorrectly. which one is it?

You are about to open a container of soy milk but notice that there are instructions to “shake well before serving.” the soy milk is most likely a