A 40-kg dog on roller skates is acceleration at 2 m/s^2. What is the net force of the dog

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 40 × 2

We have the final answer as

Hope this helps you

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

the answer would be b i believe