Answer:
winnowing
Explanation:
Husk is separated from heavier seeds of grain by winnowing. Difference in the size of particles in a mixture is utilised to separate them by the process of sieving and filtration.
Answer:
17.5 g of manganese-56
Explanation:
Now we have to use the formula;
N/No= (1/2)^t/t1/2
Where
N= mass of manganese-56 left after time (t) = ????
No= initial mass of manganese-56 present = 20 g
t= time taken for N mass of manganese-56 to remain = 7.8 hours
t1/2= half-life of manganese-56 = 2.6 hours
Then we substitute values;
N/20 = (1/2)^7.8/2.6
N/20 = (1/2)^3
N= (1/2)^3 ×20
N= 2.5 g of manganese-56
Mass of manganese-56 that has disappeared after 7.8 hours= 20 -2.5 = 17.5 g of manganese-56
Answer:
A, B AND E
Sepals, petals, stamens and carpel
Explanation:
These floral structures which are attached to the receptacle in whorls include the following:
- Sepals which protect the inner parts of the flower especially in the early stages of development.
- petals are brightly coloured, large and conspicuous especially in insect-pollinated flowers. If petals are fused, the corolla is said to be gamopetalous.
- Stamens constitute the androecium, which is the male part of the flower. Stamens are made up of filaments and anthers which produce pollen grains.
- Carpel form the pistil or gynoecium which is the female part of the flower. A carpel is made up of stigma, style and ovary.
El Nino is a relatively weak current that occurs annually when ocean water around the coasts of Peru and Ecuador are warmer than normal. It means "little boy" in Spanish. However, after approximately three all the way to seven years, the current lingers for an abnormally long time, which causes many usually negative changes to the atmosphere all around the world.
La Nina is the opposite of El Nino as it affects the same regions, except the waters are colder than normal. La Nina means "little girl" in Spanish. However, it only occurs about half as often as La Nino. El Nino occurs when the easterly trade winds weaken, while La Nina occurs when the easterlies strengthen. They both cause all sorts of unusual weather.
Hope this helped you.
