In which compound is hydrogen bonding found? Hydrogen bonding occurs only in molecules where hydrogen is covalently bonded to one of three elements: fluorine, oxygen, or nitrogen. These three elements are so electronegative that they withdraw the majority of the electron density in the covalent bond with hydrogen, leaving the H atom very electron-deficient. What […]
Is heat from a fire radiation or convection?
Is heat from a fire radiation or convection? The thermal radiation from the fire spreads out in all directions and is able to reach you. This thermal radiation is mostly in the form of infrared waves and visible light. In contrast, the campfire heat transferred via convection shoots straight up into the sky and never […]
What triggers platelet aggregation?
What triggers platelet aggregation? Substances such as collagen, ristocetin, arachidonic acid, adenosine 5′-diphosphate, epinephrine, and thrombin can stimulate platelets and hence induce aggregation. Response to these aggregating agents (known as agonists) provides a diagnostic pattern for different disorders of platelet function. Is von Willebrand factor required for platelet adhesion to collagen? Plasma von Willebrand factor […]
How many ohms does a AA battery have?
How many ohms does a AA battery have? The internal resistance can vary with things like battery age and temperature. In 10 minutes, the resistance value might be different! A common AA alkaline battery might have anywhere between 0.1 Ω and 0.9 Ω internal resistance. What voltage is a AAA battery? about 1.5V How do […]
Why are fountain pens not used anymore?
Why are fountain pens not used anymore? Originally Answered: Why do people not use fountain pens anymore? They don’t know what they’re missing. The fountain pen, now in use for nearly three-hundred years, was a huge improvement over the old quills. The need to constantly dip the instrument in ink was eliminated, and reliance on […]
Can you use mass alone to predict whether an object will sink or float?
Is transfer case oil the same as transmission fluid?
Is transfer case oil the same as transmission fluid? Most transfer cases are filled with an automatic transmission fluid, which is usually red in colour. Others use a thicker gear oil, and some use a specialized fluid that is specifically made just for that transfer case. What happens if you don’t change your transfer case […]
What are the two types of investigations?
What are the two types of investigations? Scientists use three types of investigations to research and develop explanations for events in the nature: descriptive investigation, comparative investigation, and experimental investigation. How do I know if HMRC are investigating me? You will not be notified by HMRC as soon as it is looking into your affairs […]
What 4 things should you do before you leave the lab area?
What 4 things should you do before you leave the lab area? Before leaving the lab, you’ll need to make sure it’s thoroughly cleaned so it’s ready and safe to work in again. Make sure to clean all used glassware, return reagents to the storage area, dispose waste in the right containers and clean your […]
What is better recall or recognition?
What is better recall or recognition? you would use a process of recall to retrieve the right answer from your memory. Recognition is easier than recall because it involves more cues: all those cues spread activation to related information in memory, raise the answer’s activation, and make you more likely to pick it. What is […]