This question is poorly stated, but I assume you mean what conditions are needed. It would have to be cold outside, correct?
Answer:
I think option A is correct
=> it increases the initial energy of the reactants
hope it helps
Static friction is the friction that exists between two or more solids that are not moving with a relative speed. To calculate the static friction coefficient we use the formula Fs=us × n where Fs is the static friction , us is the coefficient of static friction and the n is the normal force.
thus the coefficient of static friction will be 5 N÷ 25 N = 0.2
Hence 0.2 is the coefficient of static friction
Answer:
the size of the shadow will be smaller due to smaller hands