Answer:
Lens
Explanation:
Lenses fit this description.
Answer:
D. gravity
Explanation:
Gravity keeps the atmosphere from escaping into space.
Answer:f 30
Explanation: I am not really sure but try this
The thin atmosphere of Mars is thought to be due to the planet's lack of a magnetic field, which has allowed the Solar wind to blow away much of the gas the planet once had. Venus, despite still having a thick atmosphere of CO2, surprisingly has a similar problem
As we know that electrostatic force between two charges is given as
here we know that electrostatic repulsion force is balanced by the gravitational force between them
so here force of attraction due to gravitation is given as
here we can assume that both will have equal charge of magnitude "q"
now we have
now we have