I think it’s mechanical waves..
The correct answer is all of the above. In a nuclear reactor, the moderator is usually made of graphite, placed between the fuel rods, and used to slow down neutrons. The nuclear moderator is a medium in which reduces the speed of the fast neutrons.
Answer:
If an object's average speed is 5 m/s, it will move 5 m in 1 s.
Explanation:
Most likely, the light wave will be absorbed by the wall. Without any information as to the size and color of the wall, the location and size of the hole, or the location of the light wave, this is a generalized probability problem. For all of the places the light could be, it's more likely that it hits the wall than the hole (if the hole is less than 50% of the area of the wall).
Answer:
Height of the balloon is 6.923 miles or 11141.46m
Explanation:
We form two triangles with a common vertex so the relation of the angles is and the position both are measuring

The second triangle have the mileposts on the road that is a mile more so:


Now resolve the both equation to know the opposite side that is the height of the hot air balloon


Height=6.923miles
Leigth can be find also

The measure can be express in meters so