The answer is A.
Hydroelectric, which is usually generating electricity through use of a dam.
Solar, energy from the Sun.
Biomass, organic material formed from plant matter.
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According to Newton's Second Law:
F = m*a = 2000 kg*3.5 m/s^2 = 7000 N
It is fairly easy to build an electromagnet. All you need to do is wrap some insulated copper wire around an iron core. If you attach a battery to the wire, an electric current will begin to flow and the iron core will become magnetized. When the battery is disconnected, the iron core will lose its magnetism. Follow these steps.
Step 1 - Gather the Materials
One iron nail fifteen centimeters (6 in) long
Three meters (10 ft) of 22 gauge insulated, stranded copper wire
One or more D-cell batteries
Step 2 - Remove some Insulation
Step 3 - Wrap the Wire Around the Nail
Step 4 - Connect the Battery
I believe that the most correct statement about gases is that gases take the shape of the container. This is because gases have an irregular shape unlike solids. Gases is among the three states of matter, they contain particles or molecules which are further apart compared to those of liquids and solids due to weak intermolecular forces of attraction between them.
