3.) A German shepherd named Ace weighs 490 Newtons on Earth a) What is Ace's mass? (Be sure to include the correct SIG FIGS and UNITS)

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?

Herbivores, carnivores, and omnivores are all types a. decomposers b. producers c. consumers d. biomes

Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.