If a radioactive material has a half-life of 15 y what fraction of the material will remain after 30 y

Examples of stored energy

Explain in your own words how chlorophyll makes a leaf look green

General description of what is happening to buoyancy

A device use to break the flow of current

A small metal bar, whose initial temperature was 30° C, is dropped into a large container of boiling water.

Microwave, radio signal, light, earthquake which does not belong

A 9.0-v battery is connected to a bulb whose resistance is 2.5 ω. part a how many electrons leave the battery per minute?

What is the basic unit of matter? atom cell bacterium molecule Description

A person fires a 38 gram bullet straight up into the air. It rises, then falls straight back down, striking the ground with a speed of 345 m/s. The bullet embeds itself into the ground a distance of 8.9 cm before coming to a stop.

Subject: Science Why is it important to report experimental results honestly even when the results go against your hypothesis?