Answer:

Explanation:
It is given that,
Speed of the projectile is 0.5 v. Let h is the height above the ground. Using the first equation of motion to find it.


Initial speed of the projectile is v and final speed is 0.5 v.


g is the acceleration due to gravity
Let h is the height above the ground. Using the second equation of motion as :



So, the height of the projectile above the ground is
. Hence, this is the required solution.
Answer:
Solid gold. 10 carat indicates gold purity is not 100%. For 24 karat gold is pure gold.
Explanation:
The answer should be C) Slide against each other.
A). Both the energy and the wave travel in the same direction.
If they didn't, they'd wind up in different cities almost instantly.
Metal
Explanation:
semiconductors are materials which have a conductivity between conductors (generally metals)