Answer:
C). Corundum
Explanation:
Corundum is a crystalline type of aluminum oxide that usually contains iron, titanium, vanadium and chromium traces. Corundum is an incredibly durable and hard material. It is the third hardest mineral, after moissanite and diamond.
A geologist determine that a sample of a mineral can’t be scratched by a steel naill but can be scratched by a Masonary drill bit. Based on this information, the sample mineral has to be softer than CORUNDUM.
Due to Corundum's hardness , it can scratch almost every other mineral, and Since corundum is harder than the drill bit of masonry that can smash the mineral sample and thus the mineral sample must be softer than corundum.
The ratio of the amount of water vapor in the air to what is needed to reach saturation at a specific temperature and pressure is known as relative humidity. When the relative humidity is 100%, an air parcel is fully saturated.
<h3>What is relative humidity?</h3>
Water vapor is measured by relative humidity as well, but relative to air temperature.
In other words, it is a comparison between the amount of water vapor that is actually present in the air and the maximum amount of vapor that is possible for the air at the current temperature.
The proportion of water vapor in the air at a specific temperature is known as relative humidity. The amount of humidity is used to forecast whether it will rain, fog, or mist.
Climate control relies on relative humidity, which has an impact on people's health, comfort, and safety.
When compared to the maximum quantity of water vapor that could be present in the air at a given temperature, relative humidity is expressed as a percentage.
Learn more about relative humidity, here
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Answer:
sleeping under the mosquito net and destroy the source of mosquitoes like stagnant water
Explanation:
In Africa most people use the insecticide so as to kill the mosquitoes roaming around the house also they destroy those stagnant water by burying them and remove the impurities found in the water
Answer:
In the aftermath of the nuclear crisis in Japan, the country engaged in a massive cleanup. It cleared tons of debris, rebuilt roadways and bridges, and demolished and cleared out damaged buildings. In the future, plans should be in place for organizing citizens in cleanup efforts, making the streets safe during cleanup, and safely disposing of debris.
In addition, public transportation and airports need to function as soon as possible after such an event. Therefore, government staff should develop disaster-recovery plans for the most vital transportation systems. Local governments also need to provide short-term and longer-term housing for those who lose their homes. Designated shelters, such as schools or other community buildings, should be made ready for this purpose. Governments also need to help people get insurance payments, loans for rebuilding, and sound advice for where to locate new homes and how to strengthen them.
Answer: tropical grasslands
Explanation: i took the test :)
