Elle is pushing a box of mass 7.0 kilograms with the force of 25 newtons. if the force of friction is 2.6 newtons, what is the value of acceleration of the box?

Prompta snowboarder stands at the top of a hill and decides to see if he can increase his speed on his next trip down the slope. describe one thing the snowboarder could do to incrlase his speed on the slope. explain why this would cause his speed toincrease relate one of newton's laws to this problem.

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?

Give one example to show that when substances are mixed, it may result in a chemical or a physical change depending on the conditions.