They are limited and costly to produce. It is not cost effective to utilize these forms of energy currently.
the pitch which you hear will be greater than 300 Hz since the sound source is approaching you. But once stopped, the pitch will be 300 Hz exactly. So the pitch must be gradually decreasing from above 300 Hz to 300 Hz during the slowing down process.
Answer:
d. their color in a non-polar solvent
Explanation:
In non polar solvent such as cyclo hexane, halogens does not dilute, it rather maintains it's same or similar colour as it was in its concentrated form.
Halogens have 7 electrons in their outmost shells, examples includes chlorine, bromine, Iodine, astatine etc. They exist as room temperature.
Bromine exists as liquid.
Iodine as solid.
Chlorine as gas.
That's true...
anaerobic has to do without involving oxygen