Which of the following examples best describe using a lever? a. unscrewing a lid from a jar b. turning a screw with a drill c. pulling a box off the ground with rope d. swinging a baseball bat

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination. at the turning point, how far is the second student from the destination?