Answer:
(a) Current will be
(b) Number of ions will be
Explanation:
We have given that resistance of the biological cell
(a) We have given potential difference of 75 mV
So
From ohm's law we know that current is given by
(b) We have given time t = 0.74 sec
We have to find the charge
We know that charge is given by Q = it, here i is current and t is time
So charge will be
So number of ions will be
The best answer would be:
B. Epi pen
Here is more about it:
An epi pen injects epinephrine into the body to counteract the effects of an allergic reaction. Epinephrine helps narrow blood vessels and open up the airways. This can be used for food allergies, insect bites, and some other allergens. It is very effective and immediately works, but it is short-lived, so seeking medical attention after is still needed.
Answer:
The raduis of the geosynchronous orbit of the satellite around earth is 3.88×10^10m
Explanation:
The raduis of geosynchronous orbit of a satellite is given by:
R = Cuberoot(T^2GM)/4pi r^2
Given:
G = gravitational constant = 6.67×10^-11Nm^2
M = mass of earth = 5.98×10^24kg
r = radius of the earth = 6.38×10^6m
T = time period on the earth = 24hours
Changing hours to seconds = 24 ×60minutes ×60 seconds = 86,400seconds
Substituting into the equation
R = Cuberoot[ (86,400)^2 × (6.67×10^-11)×(5.98×10^24) / (4×3.142×(6.38×10^6)^2]
R = Cberoot [ (2.98×10^46)/(5.12×10^14)]
R = Cuberoot(5.82×10^31)
R = 3.88×10^10m
I think this answer Yes, salt is the crystal we use to season our food. But in chemistry, salt is a term used to describe a compound made by joining a positively charged acid with a negatively charged base. Table salt is the compound sodium chloride. It's composed of a positively charged sodium atom and a negatively charged chloride atom.