The Forestry Department is using a <u>chemical</u> control method. This involves using a <u>foliar spray </u>method, in which department personnel will spray pesticide directly on the trees’ leaves.
Explanation:
The chemical control method of pesticide control involves spraying chemical pesticides directly on leaves, shoots or roots of the plants. These chemicals are toxic to the pests only and the pests get retracted from the plants because of the pesticides applied.
A selective pesticide application is done to limit application to a target harmful pest which kills only that and does not harm the other useful or harmless species which thrives on the plants.
White pine blister causes rust of the branches and leaves of the pine trees. Hence, a foliar spray of the pesticide is done to control its spread.
Answer:
1.305 * 10⁻¹⁰
Explanation:
The earth disk is circular, hence the area of the earth disk is given as:
This ratio represents the fraction that would be blocked if the planet did not reflect any light, hence:
fraction of the total emitted sunlight reflected by earth = 29% of 4.5 * 10⁻¹⁰ = 0.29 * 4.5 * 10⁻¹⁰ = 1.305 * 10⁻¹⁰
Explanation:
Jupiter is the fastest-rotating planet in our solar system, it only takes at about 10 hours to complete its one rotation. The evidences for the fastest motion of Jupiter is it's gravity. Jupiter is the vacuum cleaner of planets or is having the highest gravity. The more the rotation the more the gravity. That's why Jupiter is having the highest rotational speed as it has the highest gravity.
Due to this we find the Jupiter is having the highest natural satellites. Also the asteroid belt is present between the Mars and Jupiter.
I believed the answer is b
