Scientific knowledge A.
was modified regularly early in human history, but it can no longer be modified.

B.
must be modified by popular vote from the general public.

C.
cannot be modified, even if new information challenges prevailing theories.

D.
can be modified as new information challenges prevailing theories.

If an inclined plane is 5 m long and 2 m high, what is its mechanical advantage? a. 2.5 b. 3 c. 7 d. 10

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader