Why are all machines not 100% efficient
a. mass
b. gravity
c. friction
d. distance

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f

What makes thermal imaging cameras useful? they can detect differences in color. they can detect differences in wave speeds. they can detect differences in temperature. they can detect mechanical waves.

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative