The end of which era left many plants, insects, and salamander-like animals on the earth?
a. the precambrian time
c. the paleozoic era
b. the mesozoic era
d. the cenozoic era

Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

For this car, predict the shape of a graph that shows distance (x) versus time (t). note that time is the independent variable and will be on the bottom axis. need asap