Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. this means that electromagnetic waves can travel not only trough air and solid materials, but also trough the vacuum of space.
Answer:
Do u have a picture of the graph?
Explanation:
I can solve it with refraction
Answer:
Geothermal
Explanation:
Geothermal is obtained from the heat from the ground which makes it friendly
Answer:

Explanation:
let the ladder is of mass "m" and standing at an angle with the ground
So here by horizontal force balance we will have

by vertical force balance we have

now by torque balance about contact point on ground we will have

so we will have

now from first equation we have

