Ageosynchronous satellite appears to remain over one spot on earth. a geosynchronous satellite has an orbital radius of 4.23 × 10^7m. calculate it's period.

Which of the following correctly describes the early view of catastrophism?

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

If a negatively charged particle is placed at rest in an electric potential field that increases in the positive x-direction, what will the particle do? a. accelerate in the positive x-direction b. remain at rest c. accelerate in the negative x-direction