Assuming that the acceleration due to gravity is 32.2 ft/s2 and air resistance is negligible, a projectile is launched at 56° above the horizontal with an initial velocity of 36 ft/s. the launch and landing sites are at the same elevation.

what is the projectile’s range?

37 ft

Explanation:

First find the air time:

y = y₀ + v₀ᵧ t + ½ gt²

0 = 0 + (36 sin 56°) t + ½ (-32.2) t²

0 = 29.8 t - 16.1 t²

0 = t (28.8 - 16.1 t)

t = 1.85 s

Now find the range:

x = x₀ + v₀ t + ½ at²

x = 0 + (36 cos 56°) (1.85) + ½ (0) (1.85)²

x = 37.3 ft

Rounded to two sig-figs, the range is 37 feet.

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.

the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas