Two projectile launchers are beside one another on level ground. both launchers are directed at the same angle with respect to ground. projectile a is launched with an initial speed v, and projectile bis launched with an initial speed 2v. how do the ranges of the two projectiles compare with one another? (a) projectile b will travel 4 times as far as projectile a prior to landing (b) projectile b will travel 3 times as far as projectile a prior to landing (c) projectile b will travel twice as far as projectile a prior to landing (d) projectile b will travel 2.5 times as far as projectile a prior to landing

(a) Projectile B will travel 4 times as far as projectile A prior to landing

Explanation:

Initial velocity = v

Angle at which the projectile is shot at = θ

g = Acceleration due to gravity

Range of a projectile is given by

When Initial velocity = v

When Initial velocity = 2v

Dividing the equtions, we get

Here, the angle at which the projectiles are fired at are equal.

Hence, projectile B will travel 4 times as far as projectile A prior to landing

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.

snell's law

refractve index = sin incidence / sin refraction