When an oxygen atom forms an ion, it gains two electrons

What is the electrical charge of the oxygen ion?

A.

-1

B.

-2

C.

+1

D.

+2

Consider three drinking glasses. All three have thesame area base, and all three are filled to the same depth withwater. Glass A is cylindrical. Glass B is wider at the top than atthe bottom, and so holds more water than A.

A car travels 3 km in 2 min. What is the velocity of the car?

Tracy pushes a block up an inclined plane to a height of 1.0 m. If Tracy puts 475 J of work into the system, but only 450 J are used to elevate the block, what is the efficiency of the inclined plane? A. 95% B. 106% c. 925) OD 25 J

Which pair of vectors below, if summed, would create a state of equilibrium (a resultant of 0i + 0j) ? a. 0i + 0j and 2i - 2j b. 2i + 2j and 2i - 2j c. 2i + 2j and - 2i - 2j d. 2i + 0j and 0i + 2j

Which type of wave does NOT have a crest? an electromagnetic wave a transverse wave a longitudinal wave an oscillating wave

What are at least three types of energy involving a microwave

1. At one time, people thought that heat was a substance called

How are magnet'so magnetic force and magnetic field different

Ahmed saw all of these things as he walked to school this morning. Which one is an example of a force pushing downward toward the ground? A. A bird sat on a telephone wire. B. A woman moved her child from one place to another in a wagon. C.

What types of mediums are involved in the energy transfer