Answer:
Explanation:
= Half-life of technetium-99 = 6 hours
= Initial mass of sample = 20 mg
= Time elapsed = 24 hours
Amount of mass remaining is given by
The amount of the sample that would remain is .
The gas molecules bump into each other more frequently. The gas could turn into a liquid if it is also combined with a lowered temperature.<span />
Answer:
Wind is caused by differences in air pressure.
An anemometer is a tool for measuring wind speed.
The wind-chill factor has a cooling effect
Explanation:
Answer:
Weather includes such conditions as air pressure, wind, <em><u>temp</u></em><em><u>erature</u></em><em><u> </u></em>, and moisture in the air.
