Thanks.
So the ratio of water in epsom salts is: 126.0/246.36 = 51.14 % by weight and
48.86% MgSO4. So 48.86% of what weight of epsom salts is 1.24 pounds of MgSO4?
Epsom salts = 1.24/0.4886 = 2.54 pounds ?
I need to fill my RC blimp envelope with hydrogen.
I would like to make a solution of magnesium sulfate (MgSO4) that is 15%
magnesium sulfate by mass in water. As magnesium sulfate is sold as epsom salts which is
MgSO4 7H2O I need a way to calculated the epsom salts required for the required
magnesium sulfate or 1.24 pounds per gallon of water...
Hello all,
In interested making a wood preservative using diesel fuel,
paraffin plus an algaeicide.
I am wondering if Copper Sulfate Pentahydrarte will dissolve
in diesel fuel?
If not are there other copper chemicals that may?
thanks in advance,
HarryA
I am looking to calculate the center of buoyancy of a model blimp envelope.
I have calculated various cross sections of the envelope to get the total
volume (and thus the lift) and surface area.
By center of buoyancy I mean the point that one could tie a string and
add a weight and the...
What do you call a switch that switches off an electric powered
water pump if the pressure drops to low? An example would
be if the filter gets clogged up and the pump doesn't get
enough water.
I see a lot of "water pump pressure switch 40/60 psi" but
that is not it. I don't know what...
No; stored energy is not allowed. F. W. McCooey in his book "Human Powered
Helicopter Design" calculated it would require just over one hp for flight. Humans
can not do that.
The human powered helicopter is worth 250,000$ if you can hover for
one minute and reach 3 meters. That would pay your student loans ;)
See the threads in this forum on human powered helicopter
before you start.
also see:
http://www.allaboutcircuits.com/vol_6/chpt_3/7.html
The rheostat depends on how 'small' your dc motor is.
As mdjensen22 pointed out PWMs are best but they are not cheap.
Jameco sells PULSE WIDTH MODULATOR for 25$...
this maybe helpful:http://www.techlib.com/hobby/hotwire_foam_cutter.htm
In the world of foam model airplanes they often use car battery chargers
for power source. I use, for 12 inches of straight nichrome wire
smaller than a guitar string, a 200 watt lamp in series with a light dimmer and...
A couple of old Bell Labs jokes.
Engineer's definition of a mad scientist:
"A physicist that has just been referred to
as an engineer"
Physicist rebuke:
"You can make an engineer out of a physicist
but you can not make a physicist out of an engineer;
it's an irreversible process"
{how do you...
When Noah's ark settled on the mountain Noah open the doors
and told the animals to go forth an multiply.
A little snake spoke up and said "we can't multiply we are adders!"
So Noah thought for a while then he got an idea. Noah built a table
from logs and place the pair of snakes on the table...
Q: Why did the chicken cross the road?
A: To watch a man lay bricks.
Q:What did the little bird say on finding an orange in its
nest?
A: See the orange mama laid.