Water is a resource that humans need to survive. How would this resource change if it took millions of years to replace?

A) It would be a natural resource.
B) It would be a renewable resource.
C) It would be an unnatural resource.
D) It would be a nonrenewable resource.

The earth remains in orbit around the sun due to the force of gravity. how does the force of gravity exerted by the sun on the earth compare to the force of gravity exerted by the earth on the sun?

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f

Photoelectrons with a maximum speed of 6.50 x 107 m/s are ejected from a surface in the presence of light with a frequency of 6.75 x 1014hz. if the mass of an electron is 9.10 x 10-31 kg, calculate in joules the maximum kinetic energy of a single electron. 3.84 x 10-15 j 1.92 x 10-15 j 5.92 x 10-23 j 3.07 x 10-16 j