Two masses moving on a frictionless surface approach the origin where they collide. Their initial velocities ( and ) are unknown. After the collision, the masses are joined together in a tangled mess that moves up and to the right with an angle of with respect to the x-axis. 1. What is the ratio of the initial velocities,

1.07

Explanation:

Let m1 and m2 be two masses moving with initial velocity v1 and v2.

According to law of conservation of momentum

Along x- axis

..(1)

Along y- axis

....(2)

Equation (1) divided by equation (2)

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.