Sunday

April 20, 2014

April 20, 2014

Total # Posts: 30

**Solar Energy**

1)4 2)4

**chemistry**

Calculate the surface energy of the (100) plane of niobium. The heat of atomization is 745 kJ/mol. Express your answer in J/cm2

**PHYSICIS ELENA PLEASE HELP**

A beam resting on two pivots has a length of L = 9.00 m and mass M =89.0 kg. The pivot under the left end exerts a normal force n1 on the beam, and the second pivot placed a distance 4.00 m from the left end exerts a normal force n2. A woman of mass m= 48.0 kg steps onto the l...

**Chem help-please**

I want your help providing you explan it nand show me hoe=w to gt the aswers so ai undrerahf i!

**Chem help-please**

At o degrees celcius, a 1.0-L flask contains 5.0 x 10^-2 mol N2, 1.5 x 10^2 mg O2 and 5.0 x 10^21 molecules of NH3. What is the p00artial pressure of each gasnand what is the total pressure in the flask? I need to understand how to calculate it, formula and how to get the prop...

**Chemistry-Answer & Solution please!~**

An AM radio statrion broadcasts atr 1060jGHZ Calculate tghe wavelength of the coressponding radio waves. Ned solution amdhow to get the answr! Thank you!

**DEsperate to undertsand-Chemistry**

The pressure of gas is measured at 550 mm Hg. Calculate the pressure in a. Torr b. lb/in2 c. atm d. in Hg How do I set up these conversions to get the [prper calcu;ations...step by step? This is the 3rd time zzzzzzzIve posted this question and I need to know how to get the ans...

**Chemistry-Conversions**

Can you please show me how to set up these conversions (how to do each of these conversions) Question- The pressure of gas is measured ay 550 mm Hg. Calculate the pressure in: a. Torr b. lb/in2 c. atm d. in Hg Can someone other than DrBOB answer this please!

**Chemistry-Conversions**

Can you please show me how to set up these conversions (how to do each of these conversions) Question- The pressure of gas is measured ay 550 mm Hg. Calculate the pressure in: a. Torr b. lb/in2 c. atm d. in Hg Can someone other than DrBOB answer this please!

**physical sciences**

If 57.9 grams of gold has a volume of 3 cubic centimeters what is the density of gold in g/ cm3,?

**ALGEBRA**

(0,-4) (1,1) (2,6) Simply plug in the x-coordinate into the equation and solve to get the y-coordinate.

**Math**

Pt. 1 1) 6(2+x) 2) 3x+6 --> 3(x+2) 3) x(x+3) 4) (x+3)(x+1) Pt. 2 1) 7x 2) 16+8x 3) 2x+7 4) -4x-8 5) x^2+6x+6 6) 3x^2+6x+3 Sorry.. I'm incapable of explaining it to you but here are the answers. You should really ask your teacher for that extra help as you will need to u...

**Geometry**

Whenever you see equilateral, just remember that it means all sides are equal. (tip: equil->equal, same pronounciation)

**math**

Jack's yard is a rectangle 105 feet by 212 feet. Using front-end estimation on the dimensions, what is an estimate of the area of this yard?

**Chemistry**

jnk

**English**

What does "leave his 'second best bed' to his wife" mean? I could not understand that phrase. May someone please help me? Thanks in advance.

**physics**

constant rotational acceleration

**physics**

There are two set pieces in a theater sitting on platforms with wheels. One is a tree with a mass of 50 kg. It is moving at 3 m/s. The other is a fence with a mass of 30 kg. If the two set pieces have equal momentum, how fast is the fence moving?

**Pre-algebra**

3{y-3} = 6-{y+2 +8

**science**

Why gram positive bacteria do not counter stain as with gram negative?

**Biology**

What is Uniformitarianism?How it relates to fossils?

**Biology**

What is Uniformitarianism?

**french**

But can it still be grammatically correct to say "je vais mettre les affiches?"

**french**

is it correct to say "je vais mettre les affiches" or should it be "je vais monter les affiches" (as in "I'm going to put the posters up")? Merci

**French**

1. Je FAIS, not "je fait"

**Pre Calc**

For what values of t will t-2, 2t-6, and 4t-8, in this order, form an arithmetic sequence? Could someone at least start me off?

**8th grade math**

Yes, this helped. It took me all the way back to high school. I can't believe they're doing the quadratic formula in the eighth grade. Thanks for your help.

**8th grade math**

Yes, I've had it already. I'm actually a 32 year old lawyer trying to help my teenaged sister. I forgot all of this after my sophomore year in college twelve years ago. Is this how you do it-- (A+3)A=3190 Then it becomes A(squared)+3A=3190 Then, 4A(cubed)=3190 divide b...

**8th grade math**

Your uncle is three years older than your aunt. The product of their ages is 3190. What are their ages? I know the answer is 55 and 58. But I can't come up with the correct formula or equation to get the answer. I've tried 3(A+3)=3190. It doesn't come up with the r...

**math**

If I remember correctly, a and b are variables. So you will substitute the value of a (which is 6) and the value for b (which is -4) into the problems. Before you do that, remeber that 4a is actually 4 x a or, once you change the variable a to 6, 4 x 6 or 24. The same with 4b....

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