A star has a spectrum with lines indicating the presence of ionized helium. This star should be classified as a(n) _____ type st

Newton's second laws tells us that the vertical motion of the rock in function of the time  follows  while the horizontal motion follows  where  is the angle of the throw with respect to the ground and  is the initial speed of the rock.

Let's find the horizontal range  : the rock hits the ground when  which happens for <span>, and it has thus traveled </span>.

Let's find the maximum height traveled : the maximum height is obtained when the rock's vertical speed is zero, i.e. when  that is to say at . At this time it has a height of 

Therefore the problem is resolved when  i.e. for 

Answer:

d. Mass is the amount of matter in an object.

Explanation:

This is the exact definition of the word mass. My mom is a science teacher.

Answer:

all

Explanation:

because I said so

Answer:

wY

Explanation:

it increases my mercury righy basically also on the atmosphere pressure

Hello,

The answer is option D "<span>Energy is conserved".

Reason:

The answer to this question is option D because it seems to be the best fit. Its not option A or B because energy cannot be created nor destroyed it only can be transformed into another type of energy. It shouldn't be C because energy is not always increasing because potential energy is the amount a energy that is in a object THATS NOT MOVING....therefore your answer is option D.

If you need anymore help feel free to ask me!

Hope this helps!

~Nonpotrit</span>