An isotope has a half life of 2.5 minutes how many half - lives go by in 17.5 minutes

Why it's important for scientists to use the metric system when taking measurements for an experiment?

For a constant force, the impulse could be increased by: A. decreasing the distance. B. keeping the time the force acts constant. C. increasing the time the force acts. D. none of the other answers.

A tuning fork vibrates at a frequency of 512 hertz when struck with a rubber hammer. The sound produced by the tuning fork will travel through the air as a (1) longitudinal wave with air molecules vibrating parallel to the direction of travel (2)

In what changes of state do atoms lose energy? Check all that apply

An object is in circular motion. how will the object behave if the centripetal force is removed? a. it would move in a line away from the circle B. it would move in a line toward the circles center C. it would move in a curbed, circular path B.

How can the same material bend in one situation but break in another

According to Newton's first law of motion, what would happen to a car traveling at a constant velocity of 55 MPH to the west in the absence of an unbalanced force?

The Appalachian mountain range in the Eastern United States was once much taller than the Rocky mountain range in the Western United States.

Describe how lighting is just like you walking across a carpet and getting shocked

You need to raise a heavy block by pulling it with a massless rope. You can either (a) pull the block straight up height h, or (b) pull it up a long, frictionless plane inclined at a 15∘ angle until its height has increased by h.