There is a 30 g sample of Be-11. It has a half-life of about 14 seconds.

How much will be left after 28 seconds?

A. 3.75 g

B. 7.5 g

C. 15 g

D. 30 g

An object moving in the + x direction experiences an acceleration of + 2.0 m/s2. This means the object (a) travels 2.0 m in every second. (b) is traveling at 2.0 m/s. (c) is decreasing its velocity by 2.0 m/s every second.

A 40.-kilogram mass is moving across a horizontal surface at 5.0 meters per second. what is the magnitude of the net force required to bring the mass to a stop in 8.0 seconds?

If the pressure on a gas increases, the volume of the gas also increases is that statement true or false?

Whats a good title for a science soccer project?

Destinations humans have traveled in space

If objects travelling at near the speed of light gain mass because their energy of their motion is being converted into mass, the does a photon gain mass?

16. The spreading of sound waves around openings in barriers is called A. reverberation. B. an echo. C. diffraction. D. refraction.

Specific data such as age, income, family size, and occupation, used for marketing purposes, is called A. demographics. B. survey statistics. C. a secondary market. D. the target market.

What 4 things do all living organisms need to survive

A measure of the energy of motion of the particles in a substance is its