What do pilots say before landing? Thank you.” To indicate the landing clearance or final approach, the Captain will either make the following announcement and/or blink the No Smoking sign. “Flight attendants, prepare for landing please.” “Cabin crew, please take your seats for landing.” Why do planes look slow when landing? Jeez, all these fancy […]
What are the 3 ways humans work to reduce flooding?
What are the 3 ways humans work to reduce flooding? Some methods of flood control have been practiced since ancient times. These methods include planting vegetation to retain extra water, terracing hillsides to slow flow downhill, and the construction of floodways (man-made channels to divert floodwater). What is the problem with levees? In addition, by […]
What absorbs sound the best?
What absorbs sound the best? In general, soft, pliable, or porous materials (like cloths) serve as good acoustic insulators – absorbing most sound, whereas dense, hard, impenetrable materials (such as metals) reflect most. How do I block traffic noise in my bedroom? Hang heavy curtains or drapes on windows (you could even try hanging heavy […]
When 5800 joules of energy are applied to a 15.2 kg piece of lead metal How much does the temperature change by?
How do you know if you have restricted blood flow?
How do you know if you have restricted blood flow? One of the most common symptoms of poor circulation is numbness and tingling in the hands and feet. When something is restricting the flow of blood, and blood cannot reach the extremities in sufficient quantities, a person may also have a sensation of pins and […]
How much heat does it take to boil water?
How much heat does it take to boil water? The boiling point of water is typically considered to be 100 °C or 212 °F. Pressure and a change in the composition of the liquid may alter the boiling point of the liquid. High elevation cooking generally takes longer since boiling point is a function of […]
What method is used to separate pebbles and water?
What method is used to separate pebbles and water? 1) Pour the mixture in a container having water and stir well. The salt will dissolve in it. 2) Now pass the mixture (aqueous) into another container using a sieve. The sand and the solution will pass through sieve and the pebbles will get separated out. […]
How long will it take until only 25 percent of the strontium 90 remains?
How long will it take until only 25 percent of the strontium 90 remains? It takes 28.8 years for half of the strontium to decay to 50 grams. This is called one half-life. After 28.8 more years, strontium-90 has decayed to 25 grams. How does half-life work? A medication’s biological half-life refers simply to how […]
What is the internal resistance of a 12v battery?
What is the internal resistance of a 12v battery? 500 ohms What would be the symptoms of a battery with high internal resistance? High resistance, current is restricted, voltage drops on load; battery heats up. Figure 1: Effects of internal battery resistance. A battery with low internal resistance delivers high current on demand. High resistance […]
What happens when Chlorophyll absorbs light energy?
What happens when Chlorophyll absorbs light energy? what happens when chlorophyll molecule absorbs light: what happens when chlorophyll molecule absorbs light: photosynthesis begins. it becomes excited. This energy passes through other chlorophyll molecules, and into the reaction center of Photosystem II (Electron transport chain). What is the most important function of chlorophyll? Chlorophyll’s job in […]