2. an archer shoots an arrow at 83.0 m/s at a 62.0 degree angle. if the ground is flat, how much time is the arrow in the air?

t=14.96 sec

Explanation:

Diagonal Launch

It's a physical event that happens where an object is thrown in free air (no friction) forming an angle with the horizontal reference. The object then describes a path called a parabola.

The object will reach its maximum height and then return to the height from which it was launched. The equation for the height is :

Where vo is the initial speed, is the angle, t is the time and g is the acceleration of gravity .

In this problem we'll assume the arrow was launched from the ground level (won't consider the archer's height). Thus , and:

The value of y is zero twice: when t=0 (at launching time) and in t= when it goes back to the ground. We need to find that time by making

Dividing by

Then we find the total flight time as

the answer is kevlar

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.