How is weather affected by changes in air pressure? As the pressure decreases, the amount of oxygen available to breathe also decreases. Atmospheric pressure is an indicator of weather. When a low-pressure system moves into an area, it usually leads to cloudiness, wind, and precipitation. High-pressure systems usually lead to fair, calm weather. Does air […]
Why do we feel weary when pushing a wall even though we are not doing any work on the wall?
How can transportation affect humans?
How can transportation affect humans? Our transportation system also contributes to physical inactivity—each additional hour spent in a car per day increases the likelihood of obesity. Conversely, each added kilometer walked per day reduces obesity risk. Walkable, bikable, transit-oriented communities are associated with healthier populations. What are the advantages of transport? Advantages and Disadvantages of […]
What is the difference between catalyst and enzyme?
What is the difference between catalyst and enzyme? Catalysts are substances that increase or decrease the rate of a chemical reaction but remain unchanged. Enzymes are proteins that increase rate of chemical reactions converting substrate into product. Which of the following is an example of a catalyst? Two molecules of hydrogen peroxide will produce two […]
What are the two chemical preservatives?
What are the two chemical preservatives? Sodium benzoate and sodium sorbate are two examples of chemical food preservatives. What are natural preservatives? Natural preservatives include rosemary and oregano extract, hops, salt, sugar, vinegar, alcohol, diatomaceous earth and castor oil. Traditional preservatives, such as sodium benzoate have raised health concerns in the past. What is the […]
What does aluminum foil can block radio waves?
How can I test the pH of my urine at home?
Why bases do not react with all metals?
Why bases do not react with all metals? Most metals do not react with bases but zinc metal does because it is amphoteric. When sodium hydroxide solution is heated with zinc, then sodium zincate and hydrogen gas are formed. Metals like aluminium and zinc react with bases to produce hydrogen but not all the metals […]
How much did the Apple Newton cost?
How much did the Apple Newton cost? Newton was to be a handheld computer and communicator that sold for $2,495. That’s what the original Mac cost so it didn’t seem unreadable. In today’s money, however, it’s $5,534 which does. Was the Apple Newton a failure? In the end, the Newton is remembered as the reason […]
Can you say no to deposed?
Can you say no to deposed? When you receive a subpoena to give a deposition, you are being ordered by the court to participate. In this circumstance, you have no choice but to oblige. Refusing to give a deposition following a subpoena will result in serious legal consequences. What is the purpose of being deposed? […]