A certain radioactive isotope placed near a Geiger counter registers 160 counts per second. 32 hours later, the counter registers 10 counts per second. What is the half-life of the isotope?

The plane flight covers 400 miles in the first hour. As you approach the landing site, it takes you an hour to cover the last 200 miles. This is an example of Positive Acceleration Velocity Instantaneous Speed Negative Acceleration

What is a theory that attempts to explain particles that are very small?

Consider an object with weight on the Earth W_earth. The gravity of the Earth is g. If it is moved to another planet with gravity a, how much will be its weight? Note: you don't need to put a number for variables, M, W, a, g

What do you think car designers do if the damage caused by a crash test is too severe?

How is Newton's Third Law important for snowboarding

Which of the following is NOT a strategy to prevent falls? a. keeping walking surfaces free from moisture and clutter b. replacing damaged electrical cords c. installing handrails for stairs d. keeping a ladder handy for reaching high places

What are a few things that could not be used as evidence?

Examples were friction is not useful

How do the following factors affect the resistance of a wire? a. Temperature b. Length c. Diameter

The metric system is based on units of A: twenty five B fives C: sixteen D: tens