Which statement best describes the energy of activation? A.
It is not affected by a catalyst.
B.
It is lower if the reaction temperature decreases.
C.
It is higher if the reaction temperature increases.
D.
It is more quickly overcome when the temperature increases.

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

Determine the change in width a, height b, thickness t when a plate is subjected to the uniform distributed load and is made of material having modulus of elasticity e=230 gpa and poisson's ratio ν=1/3. given : a=400 mm and b= 300 mm also the uniformly distributed load in downward y direction of plate is 2 mn/m and in the positive x direction is 3 mn/m and t=20 mm

Asap and show ! a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.