To protect the cell and to let certain things go in and out of the cell
Given that,
Density of the liquid, d = 3 g/ml
Volume, V = 20 mL
To find,
The mass of the liquid.
Solution,
The density of an object is given by its mass divided by volume such that,
d = m/V
m is mass
m = d×V
Put all the values,
m = 3 g/mL × 20 mL
= 60 grams
Hence, the mass of a liquid is 60 grams.
Well we know that a microscope is used to see things we cant see like organism's so they can study those small creatures and learn
c). The human heart is about the size of an adult's fist.
A fist-sized organ, the heart circulates blood throughout your body. It serves as your circulatory system's main organ.
Four major muscle-driven chambers make up your heart; they are each powered by electrical impulses. Your nervous system and brain control how your heart beats.
The main organ of your circulatory system, a web of blood vessels that circulates blood throughout your body, is your heart. It also interacts with other bodily systems to regulate your blood pressure and heart rate. Your lifestyle, family history, and medical history are all factors that determine how well your heart functions.
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Electrical energy involved the flow of charged particles