BMWX1

Questions and Answers

Your Questions About X100

May 25, 2013

James asks…

What is a good small camera that can take high quality pictures?

Price doesn’ matter what are some good ones.

Administrator answers:

The best is the Leica X1 at $2000, followed by the Fujfilm X100 at $1200

the more consumer friendly cameras include the Canon S95 ($400), Canon G12 ($450), Nikon P7000 ($450), Nikon P300 ($300),

bridge cameras include the Nikon P500 at $400, and the Canon SX30 IS at $400

Maria asks…

How to make sense of Multimeter reading?

I set it to amps to measure current on the 20m setting.

If the screen shows say, 3.72

how do I calculate how many amps that is?

Administrator answers:

20m means 20 mA full scale. You are reading 3.72 mA, or 0.00372 amps

SI (metric) prefixes:

da (deca) = x10 (rarely used)
h (hecto) = x100 (rarely used)
k (kilo) = x1000 = e3
M (Mega) = x1000000 = e6
G (Giga) = x1000000000 = e9
T (Tera) = x1000000000000 = e12
P (Peta) = e15
E (Exa) = e18
Z (Zetta) = e21
Y (Yotta) = e24

d (deci) = /10 = e-1 (rarely used)
c (cent) = /100 = e-2 (rarely used except for cm)
m (milli) = /1000 = e-3
µ (micro) = /1000000 = e-6
n (nano) = /1000000000 = e-9
p (pico) = /1000000000000 = e-12
f (femto) = e-15
a (atto) = e-18
z (zepto) = e-21
y (yocto) = e-24

Robert asks…

How do i find the mass of an element in a compound?

Basic copper carbonate contains 57.48% copper and 5.43% carbon by mass. What mass of carbon in g is contained in 2.749 kg of basic copper carbonate?

Administrator answers:

That mass % is incorrect… Double check those numbers!

Because.. “basic copper carbonate” is Copper(II) carbonate.. CuCO3…with…

(63.55) / (63.55+12.01+3×16.00) x100% = 51.43% Cu
(12.01) / (63.55+12.01+3×16.00) x100% = 9.72% C
(3×16.00) / (63.55+12.01+3×16.00) x100% = 38.85% O

***********
regardless.. Using YOUR numbers..

2.749kg CuCO3 x (5.43kg C / 100kg CuCO3) = 0.149kg C… 3 sig figs

*********
you should double check those %’s…

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