Which statement is true because of newton's second law?
a)when the net force on an object decreases, the objects acceleration increases.
b)when the net force on an object increases, the objects acceleration decreases.
c)when the net force on an object decreases, the acceleration doesn't change.
d)when the net on an object decreases, the object's acceleration decreases.

An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?

It is reasonable to assume that the bulk modulus of blood is about the same as that of water (2.2 gpa). as one goes deeper and deeper in the ocean, the pressure increases by 10000 pa for every meter below the surface. if a diver goes down 80.0 m in the ocean, by how much does each cubic centimeter of her blood change in volume? give the answer in cubic centimeters (actually one cubic centimeter equals one milliliter).

Matter that emits no light at any wavelength is called