How dose an atom become an ion with a - 2 charge?

What component of Star Wars is possible based on our current understanding of physics?

50 newton horizontal force to a 25 kilogram box, pushing it 6 meters

Which of the following is an example of convection? A. hot air rising and cooler air falling B. a hot oven warming the air around it C. the rays of the Sun warming the earth D. a hot object transferring heat to a cooler one P. S. this is science

7) This is a set of equal and opposite forces.

Which term describes the sum of all forces acting on an object

In our physical world, by far, the most abundance free charge in the universe is the electron, which has a negative charge. What do we mean, then, when we say that the surface of an object is positively charged?

You're going camping and are thinking of carrying 3 gallons of water. How much does the water weigh, in units of pounds?

A student is performing a double-slit experiment to determine the wavelength of a light source. She has measured the distance between dark bands and the distance between the slits and the screen.

If a substance cannot be broken down chemically into smaller substances it is A) An element B) a compound C) an atom D) a molecule

Describe the general characteristics of the nearest stars. (Size, luminosity, color, etc., do not include specific stars)