Lab partner says in newton second law by pushing a 10 KG object with 10 N and then pushed a 20 KG object with 20 in. They wanted to see effect of doubling the force of an object which choice explains why this I cannot be used to show the effect of

must double the force, with the same masses you get twice the acceleration.

Explanation:

Newton's second law establishes a relationship between force and acceleration where the constant of proportionality is mass

        F = m a

To prove these relationships you must double the force, with the same masses you get twice the acceleration.

     2F = m 2a

The downside is that if you double the mass, the acceleration stays the same.

    2F = 2m   a

co2reflects heat radiation back to earth buning coal and oil emits co2 globe warms

the answer is b, have negligible mass