math and arithmetic

math is the study of abstractions. math allows us to isolate one or a few features such as the number, shape or direction of some kind of object. then we can study what can be learned about the behavior of those features while ignoring everything else about the object.

1,194,720 questions
math and arithmetic
length and distance

how do you find kilometers per hour if you know the miles per hour ?

multiply mph by 1.609 to get km/h.

for a quick mental calculation, multiply mph by one and a half. using this method, 60 mph -> 90 km/h (where the exact conversion would be 96.56 km/h).

if you have your speed in km/h and want mph, divide instead of multiplying.

you can also type the conversion directly into some search engines like google. for example "80 mph to km/h".

math and arithmetic
irrational numbers

what is the letter symbol for irrational numbers ?

q with an apostrophe. (q') h with a bolded side.

meaning any number that cannot be written as a fraction, decimal that does not repeat or terminate.

academic writing
math and arithmetic
roman numerals

what is it called to write in capital letters ?

in the printing and publishing business, writing is called "all caps", and can be referred to as "unicase". in everyday use, however, it is call bad manners.

math and arithmetic

what is a non zero number ?

a mathematical element that when added to another numeral makes the same numeral

math and arithmetic

is 9.0832748175... a rational number ?

the answer depends on what he ellipsis represents.

math and arithmetic
units of measure
cooking measurements

how many oz is 187 milliliter ?

187 ml = about 6.32 fluid ounces.

math and arithmetic
weight and mass

0.3g equals how many mg ?

1g = 1000mg

0.3g = 300mg

math and arithmetic

what does 2 to the second power mean ?

pretty much it means you take 2 and multiply it by two

or for example; 3 to the second power is 3 multiplied by three

pretty much the number multiplied by itself

math and arithmetic
length and distance

how many meters are in 216 cm ?

100cm = 1m

1cm = 1/100m

216cm = 216/100m = 2.16m

math and arithmetic
units of measure
weight and mass

how many pounds are equal to 46 kgs ?

46 kg = 101.412641 lbs

math and arithmetic

how many three digit numbers add up to 17 ?

an infinite number if you can use positive and negative numbers.

math and arithmetic

what is a process column ?

a process column is a vertical cylinder in which a reaction takes place. the reaction is commonly one of filtering or selection, as measured by ionic charge; or molecular size and so on. often an ion-exchange resin is used as the process material.

a particular type of process column is the fractionating column, beloved of the petrochemical industry. these are tens of metres high, and rely on the fact that as the pressure reduces up the column, the boiling point of the (liquid) will change. thus the high b.p material comes off lower down, and lower b.p. come off at higher levels.

math and arithmetic

how do you solve x2 plus 4 equals 0 ?

subtract 4 from each side: x2 = -4

trouble! imaginary numbers...

x =sqrt4 x sqrt -1 ie 2i

this seems a bit upmarket for this board, is there maybe a typo?

math and arithmetic
length and distance

20.3 mm equals how many meters ?

20.3 mm = 0.0203 meters.

math and arithmetic

what does kakkoii mean ?

it means "cool" in japanese. it could also be "handsome""hot". it is a word that girls use for guys or things such as cars and things.

fuel economy and mileage
math and arithmetic

how long does it take you to travel 18 miles in a taxi ?

depends on how fast the taxi is going.

math and arithmetic

360 feet per second equals how many mph ?


math and arithmetic
units of measure

what instrument measures volume or capacity ?

volume or capacity of a fluid can be measured with a graduated cylinder,or a measuring jug or cup. for a fixed volume, you can use pipettes, micropipettes, burettes, volumetric flasks also. beakers have too high an error in them to be used in any way accurately. a eudiometer, pneumatic trough,

a solid's volume can be measured by water displacement. you could use a eureka can or this procedure:
1) fill a graduated cylinder with water
2) record the volume of the water
1) put the solid in it
2) measure the volume of the water again
3) subtract the two for the volume.

a gas's volume can be measured by collecting it in a gas collecting tube or a gas syringe.

any volume measuring tool.
instruments such as the beaker can be used.
a graduated cylinder is the most accurate way to measure liquid volume.
a capacitance bridge is an instrument used to measure electrical capacitance. it is basically a wheatstone bridge using an ac signal source, a known variable capacitance, and an indicator meter. the unknown capacitance is inserted into the bridge, and the known capacitance is adjusted to null out the meter. another method is to measure the time required to charge the capacitor to 70% of the available voltage from a constant current generator. this will tell you the total charge necessary to create the test charge in the capacitor. a similar method consists of measuring the capacitors time constant, the time required to reach 70% of available voltage when the capacitor is charged through a known resistance from a constant voltage source. the time constant is given by resistance times capacitance.
the three main tools to measure volume are: a graduated cylinder, ruler, and a beaker.

if you mean volume, you can find the volume of a rectangular prism by doing length times width times height.

you can also use water displacement to find the volume.

you use a beaker and a fraduated cyclen der

to measure the volume of fluid is used within a dial or gauge.

measuring cup filled to the volume of solids used.

can also be used to measure the volume density of the formula.
topful cup.

officially, the instrument used to measure liquid volume is called a graduated cylinder. a graduated cylinder can, through a method called "water displacement," indirectly measure the volume of solids and gases. a standard graduated cylinder has markings up to 100 ml (milliliters, marked by 1ml markings) but can hold a little more. it can be read by holding it at eye level and noting the measurement at the center of the bulge. water will bulge downwards, while mercury will bulge upwards. the bulge is called a miniscus.
a graduated cylinder

duh stupid head
typically, when measuring the volume of a liquid, you'd use a graduated cylinder, or a beaker. or if the object's a solid, you could measure the length, width, and height'and multiply those measurements together and get the volume.

graduated cylinder

additional answer

although this would not measure the volume of either a gas or a solid.
graduated cylinder
this is a statement and clearly homework. if you wish to ask for a means to approach the statement wiki can help you, but we won't do your work for you.
a graduated cylinder
you could use a graduated cylinder, a ruler, or a beaker
a ruler and a graduated cylinder!! :)
cup is filled with the solids.

dial gauge is used for liquids.
dial gauge
you use a graduated cylinder. when the water rises, you subtract what the water used to be, from what it changes to when you drop in the object.
to measure the volume of an irregular shaped object (a rock or pencil, form example), you would use a graduated cylinder.

for a regular shaped object (block, cube) you can use a ruler and measure length, width and height, to use in the formula

length x width x height
to measure the volume of fluid within the rating.

measuring cup filled to the volume of solids.
gradugated cylinder
various tools can be used to measure capacity. eyedroppers, cups, bottles, graduated cylinders, and beakers are just a few.
acoustic volume --> use a microphone

volume of a gas --> i'd leverage some chemistry and pv=nrt, i suppose

volume of a liquid --> volumetric flask

capacity of an lvm volume --> command "df -h"

... nuk nuk nuk
a beaker duh
a graduated cylinder

you can use a beaker

math and arithmetic
percentages, fractions, and decimal values

what percent of 200 is 170 ?

expressed as a percentage, 170/200 x 100 = 85 percent.

math and arithmetic
percentages, fractions, and decimal values

what is a fraction of 0 over 3 equal ?

0 over 3 is equal to 0.

math and arithmetic
units of measure
length and distance

how many mm in 1000 km in standard form ?

since a kilometer has 1000 meters, and a meter has 1000 millimeters, you must multiply the number of kilometers by a million.

math and arithmetic

how many years is 59 months ?

it is one month less than 5 years (60 months).

59 months divided by 12 months in a year is about 4.92 years.

math and arithmetic

how many times will 15000 million go into one billion ?

one "thousand million" = one billion

15,000 million = 15 billion

1 billion/15 billion = 1/15 = 0.0666... (rounded)

electrical engineering
history of the united states
math and arithmetic

1 mw has got how many units ?

the megawatt is equal to one million watts.or it can be 1000 kilo watt. it means 1 kilo watt is equals to 1000 watt.hope now it is clear.

another answer

a megawatt (mw) is used to measure power, i.e. the rate of energy consumption. a unit , on the other hand, is another term (in the uk, at least) for a kilowatt hour , which is used to measure energy. the watt and the unit are used to measure two different quantities, so cannot be converted one to the other.

math and arithmetic

what are all the factors of 540 ?

540, 270, 180, 90, 60, 54, 45, 36, 30, 27, 20, 18, 15, 12, 10, 9, 6, 5, 4, 3, 2, 1

540 x 1

270 x 2

180 x 3

135 x 4

108 x 5

90 x 6

60 x 9

54 x 10

45 x 12

36 x 15

30 x 18

27 x 20