I don't know the name, but the opposite of gravity, if that helps!
Answer:
The take-off speed is 41.48 
Explanation:
Given :
Range
m
Projectile angle
13°
From the formula of range,

Find the velocity from above equation,

( ∵
)

Therefore, the take-off speed is 41.48
Yes you're correct. For distance, SI is based on meters.
Answer:
Id say C
Explanation:
The hypotenuse for c is up and to the right so the unit vectors show that
<span>The question is what do all types of waves transfer. Waves, both mechanical and electromagnetic are disturbances that transfer energy without transporting matter. It doesnt matter wether they are propagating trough a medium or trough vacuum. Therefore the correct answer is A. energy.</span>