How do you determine the mass without counting all the items inside?
816889
Weigh the whole bag.\n\nWhat items "represent" the bag?\n\nWhere does it say you can't weight the whole bag, except in your tirade afterthought?
966154
The magnitude of a force is measured in newtons(N)
47846
Look up the atomic mass (sometimes called atomic weight) on the periodic table, and subtract the atomic number from it.  The atomic mass is (practically) equal to the total number of protons and neutrons, and the atomic number is equal to the number of protons.  When you subtract atomic number from atomic mass your subtracting the number of protons from the total number of protons and neutrons, which leaves you with just neutrons.
851431
MASS / VOLUME\n that's way you measure it in g/mL
119352
All is clear once you understand the difference between mass and weight.\n\nIf you are not sure, look here:
1080952
mass, volume and temperature.
22234
Use a high quality digital scale. They sell these at office supply stores like Staples. You can also use a 2-ounce mechanical scale (just make sure it's properly calibrated to 0).
859844
The previous answerer has the right idea but the wrong details.\n\nThe four parts should weigh 1, 3, 9 and 27 pounds.  The logic is that the desired weight is written in "balanced ternary" notation, where the values of the digit positions are 1, 3, 9, 27, 81, . . . (that's "ternary"), but the allowed digit values instead of being 0, 1, 2 (that's regular ternary) are -1, 0, 1 (that's balanced ternary).  Then the digit values for any desired total weight written down in balanced ternary tell you whether the weight for that column is to go in one pan, go in the other pan, or stay on the floor.
857152
I'll agree that you need help.  Density is mass/vol.  You've given the density, you need another value to calculate the remaining value.
613586
For calculating weight you will be needing the specific gravity or bulk density of the material it is made of.\nElse you need a weigh balance.
789266
Of course, it really depends on what lengths, masses and time increments you are trying to measure and why.  The key is to have a foundation reference point with each measurement.  But here are some ideas:\n\nLength:  A piece of string or a piece of paper is good tool.  If you need to know exactly how many feet something is, a common record album is 12 inches across ( 1 foot) or a standard floor tile which is 12 inches from one flat side to its' opposite.  Use this as your foundation length of your string.  For long distance you can guage the length of your footstep using the above method, then count your footsteps when walking constistently, or use the odometer in your car.  Not a precise technique but approximate.\n\nMass:  A bucket filled to the top with water, placed inside another bucket that can catch spilled water.  Let's say you want to find the mass of a bowling ball.  Simply place the bowling ball into the bucket filled to the top with water, and whatever water it displaces (and is caught in the second bucket), is its mass (example: 1 gallon).  Repeat these steps to find out the mass of other things like your dog.  It's not an exact science but it's a basis for comparison at home as long as you keep using the same buckets.\n\nTime:   The sun is always good for this since our clocks are based on exposure to it due to rotation of the Earth every 24 hours, and our revolution around it once a year.  It's how sundials work.  You use a shadow.  You can mark the position of a shadow with a pen or a scratch, then observe (and mark) how the shadow has changed at a later moment.  When sunlight is not available, candles are good to observe the passage of time in a similar way as they burn and melt, as long as you keep using the same kinds of candles.
577532
How much does a penny weigh?  How much does the empty water bottle weigh?  Take total water bottle full of pennies minus empty water bottle weight, get result; then use that result and divide by individual penny weight and that should tell you how many pennies there are.  The divide that by 100 and will tell you dollar amount.  have fun finding a sensitive enough scale though.
604031
get the mass of sucrose that you're dealing with\n\nget the atomic mass of sucrose itself\n\nmass of sucrose / atomic mass of sucrose = moles
917567
goes by weight \nget a f.u.c.k.i.n.g clue\nnext question
999871
if you know the weight of the metal used and then how much of it was used you could calculate it and the same for all the non metal parts
915631
Thea answer is basic:\nBecause one can measure mass to a higher degree of accuracy than volume.
191332
Find the dementions and multiply.