Carbon-14 has a half-life of 5730 years after how many half lives will 120 g of carbon-14 decay to 15 g

A. One

B. Two

C. Three

D. Four

A driver starts his parked car and within 5 seconds reaches a speed of 60km/h, as he travels east. What is his acceleration?

Is it possible that a speed of 254 and a speed of 100 could be the same speed?

6. Light from the sun reaches the earth in 480 seconds. The speed of light is 300,000,000 m/s. How far is the earth from the sun?

For each group of terms, write a sentence that shows how the terms are related using position: time: motion

A child does 0.20 joule of work to compress the spring in a pop-up toy. if the mass of the toy is 0.010 kilogram, what is the maximum vertical height that the toy can reach after the spring is released?

A car traveling 26 m/s starts to decelerate steadily. It comes to a complete stop in 13 seconds. What is it's acceleration. ___m/s^2

Less work was done. What is one possible reason why this has happened? A. There was more force applied; therefore, there was less movement. B. There was less force applied; therefore, there was more movement. C.

What are the optimal conditions for using a solar oven?

What is the magnifying power of an astronomical telescope using a reflecting mirror whose radius of curvature is 5.5 mm and an eyepiece whose focal length is 2.9 cmcm? Follow the sign conventions.

Who was the first person to observe a sign of molecular motion?