Category: Physics

Is infrared reflected by mirrors? Do mirrors reflect only visible lights, or do they reflect light of other frequencies (if so then which types–x-ray, infrared, gamma, etc)? Yes and no, a normal mirror reflects visible light and likely near IR and UV, but it’s not optimized for anything past that. Do Humans give off infrared […]

What are the important things to remember while snorkeling? 11 Snorkeling Tips to Remember on Your Next Underwater Adventure Get the Right Equipment (And Make Sure It’s Not Cheap!) Learn How to Defog Your Mask. Learn How to Get Water out of Your Mask. Practice Before You Go. Don’t Swim Too Fast. Make Sure You’re […]

What are divisible by 5? A number is divisible by 5 if its units place is 0 or 5. Consider the following numbers which are divisible by 5, using the test of divisibility by 5: 50, 75, 90, 165, 120. In 50, the unit’s place digit is 0. Hence, 50 is divisible by 5. Is […]

What is rounded to the nearest inch? Sometimes we measure things that do not come to exact inches. Then we can round our measure to the nearest inch. When a measure reaches the half-inch mark or more, round to the next inch. This line is between 2 and 3 inches. What does it mean to […]

How do you find an exponent in an equation? How to solve for exponents xn=y. Take the log of both sides: logxn=logy. By identity we get: n⋅logx=logy. Dividing both sides by log x: n=logylogx. Find the exponent of a number. 3n=81. Take the log of both sides: log3n=log81. By identity we get: n⋅log3=log81. Dividing both […]

What medications do psychiatrists prescribe for anxiety? When treating anxiety disorders, antidepressants, particularly the SSRIs and some SNRIs (serotonin-norepinephrine reuptake inhibitors), have been shown to be effective. Other anti-anxiety drugs include the benzodiazepines, such as as alprazolam (Xanax), diazepam (Valium), buspirone (Buspar), and lorazepam (Ativan). What medication is used for mental health? What Drugs Treat […]

How do you find the molecular geometry? Steps Used to Find the Shape of the Molecule Draw the Lewis Structure. Count the number of electron groups and identify them as bond pairs of electron groups or lone pairs of electrons. Name the electron-group geometry. Looking at the positions of other atomic nuclei around the central […]

Which stage lasts the longest? The Star remains the longest in the stage when it is burning Hydrogen into Helium. For our Sun this is called the main sequence stage which will last for about 4.5 Billion years more , this depends on how fast the star is burning up fuel. For more massive stars […]

Who discovered M82? Johann Elert Bode How was M82 discovered? As a member of the M81 group, M82 is 12 million light years distant. M82 was discovered on December 31, 1774 by Johann Elert Bode together with M81; he described it as a “nebulous patch”, about 0.75 deg away from M81, which “is very pale […]

What temperature does quartz crack? Manufacturers market quartz as able to withstand temperatures up to 400 degrees Fahrenheit (one reason it works well as fireplace surrounds). But “thermal shock” can result from placing a hot pan straight from the oven or stovetop onto a cold quartz countertop, which can lead to cracking or discoloring. Can […]