Scientists believe Earth is about how many billion years old

Choose the law each sentence describes. 1. This law relates a planet's orbital period and its average distance to the Sun. a. Keplers first law b. Keplers second law c. Keplers third law 2.

What is in the boron family with 3 valence electrons

How can the direction of the electric field created by an electron be correctly described?

What force is required to accelerate a 10 kg mass at 5m/sec^2

In a bumper car arena, two cars of equal mass are heading straight toward each other. The orange one is traveling at a speed of 5 meters per second. The green one is traveling at a speed of 2 meters per second.

The liquid contained in batteries that conducts electric charge is called the: solution, electrolyte, suspension, colloid

Which term describes the second personality seen in a person with dissociative identity disorder (DID) ? A. ego B. superego C. alter ego D. id

What happens to the partiles of a soild as it becomes a liquid

How was the gravitational constant G first determined

There is an explosion on the surface of a lake and two people John and Nil hear its sound. John is 150m away on a boat and Nil is 150m below the surface of water. Who would hear the sound first and why?