Which ion is formed when an atom of flourine gains one electron

What two observable properties of a cepheid variable are directly related to one another?

A 100-volt electromotive force is applied to an rc-series circuit in which the resistance is 500 ohms and the capacitance is 10?4 farad. find the charge q (t) on the capacitor if q (0) = 0.'

6. What is the speed (v) of an object with 13 kg of mass and a momentum of 3 kg- m/s?

Which best explains why magnets can push on or pull other magnets without touching them? North poles always attract each other, and south poles always force each other away.

g During a collision with a wall, the velocity of a 0.4 KgKg ball changes from 25 m/sm/s towards the vall to 12 m/sm/s away from the wall. If the time the ball was in contact with the call was 0.

O'Malley is riding on a bus which is moving at 10 m/s, and he throws a ball which he observes to be moving at 10 m/s relative to him in the direction of motion of the bus. What speed will Ophelia observe the ball to have?

Part 1. A girl leaves a history classroom and walks 10 meters north to a drinking fountain. Then she turns and walks 30 meters south to an art classroom. What is the girl's total distance traveled? Part 2. Using the information above from Part 1.

Which of the following is an example of a physical change but not a chemical change? A) The log gives off heat and light as it burns B) A tree stores energy from the sun in its fruit C) A penny lost in the grass slowly changes color D) A water pipe

Land masses that move on Earth are called: a. Continents b. Tectonic continents c. Tectonic plates d. Rock Masses

Will two separate 50db sounds together constitute a 100db sound explain mathematical