12. Use your Periodic Table and locate the element that is in Group 18, in the second Period. A. What is the name of that element?
B. What is the name of the Group that element is in?
C. What is the state of matter (solid, liquid or gas) of that element?
D. What is the reactivity of that element?

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.

What happens when you slowly pulled the carboard?