Nancy needs to do a scientific investigation for her class. She is interested in pottery, plants, and basketball. Which of the f
ollowing questions would be suitable for use in a scientific investigation? A. What length of time is best to use for the firing of pottery to make it strong?
B. What is the most number of points ever scored in a professional basketball game?
C. How many needles grow on the giant redwoods in California?
D. What color of carnation flowers do people find most attractive?
A. What length of time is best to use for the firing of pottery to make it strong?
Explanation:
Point A
What length of time is best to use for the firing of pottery to make it strong?
This is a scientific question for Nancy since while making pots from black mud, it is very important to know how much time is required to fire the pot in order to make it strong. Because if we fire it for too long the pot may be become too hot and will eventually crack. While if we fire for less time it will not become hard enough to withstand its shape. So knowing the proper time to fire the pot is very essential in pottery.
Point B, Point C and Point D are not scientific investigations since it includes ones likes and dislikes, quantities and numbers of goal scored which is not scientific.
Gravitational potential energy, depends only of the mass on which the gravity is doing work, and the displacement produced by this force.
As displacement depends only on the final and initial positions (in this case, the height of the hill), if we choose as our zero reference level the bottom of the hill, the change in gravitational potential energy will be as follows:
As we can see, the only value of distance involved is the height of the hill , so it is independent of the distance travelled.
