What type of plate boundary is shown in this illustration?
a) mantle boundary
b) transform boundary
c) divergent boundary
d) convergent boundary

The gravitational force between two objects is 1600 and what will be the gravitational force between the objects if the distance between them doubles?

Awind turbine is initially spinning at a constant angular speed. as the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.173 rad/s2. after making 2870 revolutions, its angular speed is 132 rad/s. (a) what is the initial angular velocity of the turbine? (b) how much time elapses while the turbine is speeding up?

What are similarities and differences of reflection, refraction, diffraction and absorption?