Which type of materials that are on fire can you tackle using a normal water filled fire extinguisher? Standard water extinguishers Water extinguishers are only suitable for class A fires, which means they can fight fires that involve wood, cardboard, paper, plastics, fabric and textiles, and other solid materials. What kind of fire extinguisher do […]
Do bats bite sleeping humans?
Do bats bite sleeping humans? Even if you aren’t sure whether you’ve been bitten, seek medical attention. For instance, a bat that flies into your room while you’re sleeping may bite you without waking you. Why do vampire bats need to drink blood? And the vampire bats’ DNA contains tweaks to kidney function that allow […]
What are the types of alloys?
What are the types of alloys? Uses of alloys Alloy Composition Uses Duralumin Aluminium and copper Aircraft parts Magnalium Aluminium and magnesium Aircraft parts Bronze Copper and tin Propellers for ships, bells Brass Copper and zinc Coins, musical instruments Is Bronze an alloy? What Is Bronze? Bronze is a copper-based alloy that typically consists of […]
What is the drawback of using passive sensors?
What is the drawback of using passive sensors? Passive sensors, therefore, do not emit energy: they rely on energy that is preexisting in the environment….What are the main sensors types? ACTIVE Advantages Disadvantages PASSIVE Advantages Disadvantages What is active and passive satellite? In addition to amplification, it performs frequency translation of the received signal before […]
Which is the best example of Commensalism?
Which is the best example of Commensalism? remora What are 5 examples of Commensalism relationships? Examples of Commensalism Remora fish have a disk on their heads that makes them able to attach to larger animals, such as sharks, mantas, and whales. Nurse plants are larger plants that offer protection to seedlings from the weather and […]
What is the difference between sedimentary and igneous rocks?
What is the difference between sedimentary and igneous rocks? There are three kinds of rock: igneous, sedimentary, and metamorphic. Igneous rocks form when molten rock (magma or lava) cools and solidifies. Sedimentary rocks originate when particles settle out of water or air, or by precipitation of minerals from water. They accumulate in layers. What are […]
How does airplane wing work?
Can a balloon make it to space?
Can a balloon make it to space? A helium-filled balloon can float very high up into the atmosphere, however, it cannot float up into outer space. The balloon can only rise up until the atmosphere surrounding it has the same weight as the helium in the balloon. This happens at about a height of 20 […]
What is the relationship between heat and the density of air?
What is the relationship between heat and the density of air? As the molecules heat and move faster, they are moving apart. So air, like most other substances, expands when heated and contracts when cooled. Because there is more space between the molecules, the air is less dense than the surrounding matter and the hot […]
What is another word for Zenith?
What is another word for Zenith? What is another word for zenith? peak pinnacle apex height summit top acme apogee climax culmination How do you use Zenith? Zenith sentence example These years mark the zenith of Athenian greatness. The sun was well past its zenith and headed toward the trees on the west side of […]