The reaction shown below is used in the production of steel. it is an exothermic reaction. an engineer thinks that by finding the correct catalyst, he can reduce the amount of energy released by the reaction. will his plan have the desired effect? explain your answer. fe3o4(s) + 4c(s) → 3fe(s) + 4co(g

Can you match these to the correct definition

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".

Your friend increases her force on the desk by 30n . she doesn't change the direction of her push . what happens to the net force on the desk .will the desk accelerate