Gravity pulls downward on a rock with a force of 800 n. if you pull upward on the rock with a force of 400 n, what is the total force acting on the rock?

a. 400 n downward
b. 400 n upward
c. 1200 n downward
d. 1200 n upward

Which transition by an electron will release the greatest amount of energy? oa ob oc od

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n