Answer:
Pollen
Explanation:
Pollen is a powdery substance consisting of pollen grains which are male microgametophytes of seed plants, which produce male gametes (sperm cells).
Answer : The boiling point of the solution is
Explanation :
Formula used for Elevation in boiling point :
or,
where,
= boiling point of solution = ?
= boiling point of water =
= boiling point constant of water =
m = molality
i = Van't Hoff factor = 1 (for non-electrolyte)
= moles of solute (ethylene glycol) = 0.75 mole
= mass of solvent (water) = 1 kg
Now put all the given values in the above formula, we get:
Therefore, the boiling point of the solution is
Answer:
As the frequency increases, the wavelength decreases. ... (a) For a given sound, as the temperature increases, what happens to the frequency? There is no change in frequency. The speed of sound increases by about 0.5 m/s for each degree Celsius when the air temperature rises.