Which of the following will cause an increase in the mass of an object? (1 point) а
Increase in the gravitational pull
b
Decrease in the gravitational pull
Ос
Increase in the amount of matter present in the object
d
Decrease in the amount of matter present in the object

Ineed the answers for these promblems i have

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?

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).