Two people timed an object with a stop watch .they each got a slightly different result. how could this be ?

One of the key differences between franchising and chain stores is the amount of risk involved. When a company chooses to expand with chain stores, it assumes all of the risk on its own. It funds the entire expansion project. By comparison, when a company franchises, it passes some of the risk onto other investors. Franchising represents less risk for the parent company, but it shifts the risk to the franchisee.

the average speed is 24.57 km/hr

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.