You are pushing on a heavy door, trying to slide it open. if your friend stands behind you and you push, how have the forces changed?
a. the net force applied will increase.
b. the net force will decrease.
c. there will be less friction.
d. the applied force does not change

A. The net force applied will increase

Explanation:

This is an example of Newton's second law that says that you will need more force to move an object of a lot of mass. F = m×a;  F=Force= M= Mass×A= Acceleration

21 stacks

step-by-step explanation:

divide 630/30

21 stacks

enjoy!

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."