Science

How to Questions and Answers About Science

My hemoglobin levels reportedly dropped from 19 before donating to 13.5 a week later. Is this realistic ?

My hemoglobin levels reportedly dropped from 19 before donating to 13.5 a week later. Is this realistic ?

Red LED flashlight for viewing sea turtles?

I heard that you need a special flashlight if you are on the beaches of Florida at night or early morning that won’t disturb nesting sea turtles and such. Is this true? If so where can I buy these? Yes we were just going to look around for a few shells in the morning and…

X-coordinates of inflection points?

What are the x-coordinates of inflection points of -(3x+3sin(x))

What is the fastest object with mass?

I recently found out that PSR J1748-2446ad is spinning at 24% the speed of light, is there any thing faster?

find the eigenvalues and eigenvectors?

find the eigenvalues and eigenvectors of the following 3*3 matrix -3 -7 -5 2 4 3 1 2 2

What Is That ‘Ding’ Sound I Occasionally Hear in the LIVE Ghost Hunt at The Sallie House?

I hear a ‘ding’ sound every so often. I keep checking the feed to see if it is signifying an apparition or something, but can’t seem to see anything. What is the ‘ding’ for?

How can I tell if the moon is waxing or waning?

How can I tell if the moon is waxing or waning?

Would my doctor give me a prescription of antibiotics for a research?

For school i’m doing a research about antibiotics… bacterial resistance… i’m gonna add some antibiotics to e-coli bacteria to see if it becomes resistant or dies. the antibiotic i wanna use is doxycycline. Will my doctor prescribe me them if i explain to him that i’m only gonna use it for school stuff?

1. because plants have chloroplasts they do not require mitochondria?

true or false the statement 2.—— results from the interactions between polypeptide chains a.primary structure b.secondary structure c.tertiary structure d.quaternary structure 3.Peroxisomes a.detoxufy alcohol b.build polysaccharides c.are single-celled organisms d.expel extra water not sure about the answer.I answered 1.false, 2.d and 3.a.just want make sure.thanksss

Do they drug test for sports physicals? If so how long till my systems clean?

I’m 6’1 230 pounds and I have neverr smoked in my life until 2 weeks ago and I smoked an 9th of a gram 2 weeks ago to myself I shared 2gs with a bunch of friends, then I smoked about a gram of white widow oct 19, I have to take a sports physical…