Answer:
In order for the eye to see an object, light from the object must be reflected to your eye.
Answer:
Solution given:
<u>any three applications of electromagnetic </u><u>waves</u><u> </u><u>are</u><u>:</u>
- <u>Used</u><u> </u><u>for</u><u> </u><u>cooking</u><u> </u><u>purpose</u><u> </u><u>in</u><u> </u><u>microwave</u><u>.</u>
- <u>Used</u><u> </u><u>in</u><u> </u><u>RADAR</u><u> </u><u>system</u><u> </u><u>for</u><u> </u><u>aircraft</u><u> </u><u>navigation</u><u>.</u>
- <u>Used</u><u> </u><u>in</u><u> </u><u>communication</u><u>.</u>
2.
Solution given;
power [P]=100W
Current [I]=5A.
Voltage [V]=?
we have
P=IV
100=5*V
V=
=<u>2</u><u>0</u><u>V</u>
<u>the voltage of the battery used in the </u><u>car</u><u> </u><u>is</u><u> </u><u>2</u><u>0</u><u>V</u><u>.</u>
Answer:
The amount of air resistance an object experiences depends on its speed, its cross-sectional area, its shape and the density of the air.
Explanation:
<span>Four waste materials from copper ore processing are: ore minerals, unwanted rock or gangue, uranium, and pyrite/sulfide minerals. Ore minerals are contained in rock and have potential to be economically extracted, gangue may contain silicate minerals for which there is no economic value, uranium is a frequently-occurring radionuclide found in ore bodies, and pyrite and sulfide minerals may be found in tailings piles during copper processing.</span>