***first correct answer gets a brainliest***
need fast.

the speed of an object is halved, what happens to its kinetic energy?
a. it is doubled
b. it stays the same
c. it is quartered
d. it is halved

In the image, the arrow is pointing to a celestial object. which attribute disqualifies the object from being a planet?

Suppose that two tanks, 1 and 2, each with a large opening at the top, contain different liquids. a small hole is made in the side of each tank at the same depth 1.57 m below the liquid surface, but the hole in tank 2 has 2.49 times the cross-sectional area of the hole in tank 1. (a) what is the ratio ρ1/ρ2 of the densities of the liquids if the mass flow rate is the same for the two holes? (b) what is the ratio rv1/rv2 of the volume flow rates from the two tanks? (c) at one instant, the liquid in tank 1 is 14.9 cm above the hole. if the tanks are to have equal volume flow rates, what height above the hole must the liquid in tank 2 be just then?

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?