Do houses use DC or AC? Household outlets are AC – Alternating Current. This current has a frequency of 60 Hz and would look something like this (if you plotted current as a function of time). This alternating current would work fine with something like an incandescent lightbulb, but not so fine for your smart […]
Why is freezing point depression a Colligative property?
Why is freezing point depression a Colligative property? Freezing point depression is a colligative property observed in solutions that results from the introduction of solute molecules to a solvent. The freezing points of solutions are all lower than that of the pure solvent and is directly proportional to the molality of the solute. Can water […]
What is the cause of seafloor spreading?
What is the cause of seafloor spreading? Seafloor spreading occurs at divergent plate boundaries. As tectonic plates slowly move away from each other, heat from the mantle’s convection currents makes the crust more plastic and less dense. The less-dense material rises, often forming a mountain or elevated area of the seafloor. Which boundary is seafloor […]
Are there slaves in America today?
Are there slaves in America today? Prevalence. The Global Slavery Index 2018 estimates that on any given day in 2016 there were 403,000 people living in conditions of modern slavery in the United States, a prevalence of 1.3 victims of modern slavery for every thousand in the country. When did Africa ban slavery? In January […]
How do you read a vernier scale?
How do you read a vernier scale? Follow these steps to read the vernier scale: Read the main scale. Look for the last whole increment visible before the 0 (zero) mark. Read the secondary scale (Vernier) measurement. This is the division tick mark that lines up best with a mark on the main scale. Add […]
What phase does chromosomes become visible?
What phase does chromosomes become visible? prophase Why do sister chromatids line up in the center of the cell? The sister chromatids line up at the equator, or center, of the cell. The spindle fibers ensure that sister chromatids will separate and go to different daughter cells when the cell divides. What is it called […]
What is current booster?
What is current booster? If the output current requirement is as high as 10A, then it is convenient to boost a regulator output current with the help of external circuit. The current boosting can be achieved by using external transistor connected in parallel with regulator IC. How does current booster work? The power transistor is […]
What type of radiation has the greatest penetrating power?
What type of radiation has the greatest penetrating power? Gamma rays How can you protect yourself from radiation? Staying inside will reduce your exposure to radiation. Close windows and doors. Take a shower or wipe exposed parts of your body with a damp cloth. Drink bottled water and eat food in sealed containers. How long […]
Is High Altitude good for your lungs?
Is High Altitude good for your lungs? If you have COPD and enjoy traveling, then you might already know that high altitude can make COPD symptoms worse. At higher elevations, your body needs to work harder to take in the same amount of oxygen as it does at elevations closer to sea level. This strains […]
What do molecules and atoms have in common?
What do molecules and atoms have in common? An atom is composed of subatomic particles (electron, neutron and proton), a nucleus and electron cloud. Electrons are negatively charged particles that reside in an electron cloud that revolves around the central nucleus. A molecule is composed of two or more atoms that are held together by […]