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3 years ago

What is a variable and what do it do

2 answers:

4 0

A variable is a quantity that may change within the context of a mathematical problem or experiment. Typically, we use a single letter to represent a variable. The letters x, y, and z are common generic symbols used for variables.

Variables are used to store information to be referenced and manipulated in a computer program. They also provide a way of labeling data with a descriptive name, so our programs can be understood more clearly by the reader and ourselves. It is helpful to think of variables as containers that hold information.

frosja888 [35]3 years ago

3 0

Varuable, In algebra, a symbol (usually a letter) standing in for an unknown numerical value in an equation :)

You might be interested in

Indicate whether each statement is true or false: a. Substitutional alloys tend to be more ductile than interstitial alloys. b.

Masteriza [31]

Answer:

Substitutional alloys tend to be more ductile than interstitial alloys. true

Interstitial alloys tend to form between elements with similar ionic radii.false

Nonmetallic elements are never found in alloys. false

Explanation:

Substitutional alloys consists components having similar atomic(ionic) radii as well as common bonding characteristics. In interstitial alloys, atoms in interstitial positions must have a much smaller covalent radius than the solvent atoms. Interstitial atoms are generally less ductile than substitutional alloys.

Nonmetals are found in alloys. For instance, carbon is a component of the common alloy called steel.

3 0

3 years ago

A mercury manometer is used to measure pressure in the container illustrated. Calculate the pressure exerted by the gas if atmos

Brilliant_brown [7]

Answer:

Pressure exerted by the gas is 574.85 torr

Explanation:

Atmospheric pressure = 751 torr

but 1 torr = 1 mmHg

therefore,

atmospheric pressure = 751 mmHg

1 mmHg = 133.3 Pa

therefore,

atmospheric pressure = 751 x 133.3 = 100108.3 Pa

distance labeled (tube section with mercury) = 176 mm

the pressure within the tube will be

$P_{tube}$ = ρgh

where ρ is the density of mercury = 13600 kg/m^3

h is the labeled distance = 176 mm = 0.176 m

g is acceleration due to gravity = 9.81 m/s^2

$P_{tube}$ = 13600 x 9.81 x 0.176 = 23481.216 Pa

The general equation for the pressure in the manometer will be

$P_{atm}$ = $P_{tube}$ + $P_{gas}$

where $P_{atm}$ is the atmospheric pressure

$P_{tube}$ is the pressure within the tube with mercury

$P_{gas}$ is the pressure of the gas

substituting, we have

100108.3 = 23481.216 + $P_{gas}$

$P_{gas}$ = 100108.3 - 23481.216 = 76627.1 Pa

This pressure can be stated in mmHg as

76627.1 /133.3 = 574.85 mmHg

and also equal to 574.85 torr

6 0

3 years ago

How many milliliters of 0.130 M HCl are needed to completely neutralize 41.0 mL of 0.107 M Ba(OH)2 solution?

Anvisha [2.4K]

54 mL Ba(OH)2x(0.101 mol Ba(OH)2/1000 mL) x (2 mol OH-/ 1 mol Ba(OH)2 ) = 0.0109 mol OH-

0.0109 mol OH-x (1mol HCl/ 1 mol OH- ) = 0.0109 mol HCl

0.109 mol HCl/(0.130 mol/L HCl) = 0.0839 L HCl

0.0839 L HCl * 1000mL = 83.9 mL of 0.130 M HCl

3 0

3 years ago

20 points!!!!!!Gravity would cause the rain falling in which two locations to drain an into area a. I’m assuming it’s 1 and 5 bu

zimovet [89]

Answer:

youre right i think its 1 and 5

because it cant be 2 or 3

Explanation:

I hope this answers your question(s). Have a good weekend!

7 0

2 years ago

Which of the following statements is false?

natka813 [3]

Answer:

Explanation:

I think B is false because you should communicate with all sorts of people, in order to learn different views/sides of something.

3 0

3 years ago