Wednesday

July 23, 2014

July 23, 2014

Total # Posts: 22

**Physics**

Amber, did you get the answer for this?

**high shoool algebra**

67087-

**ALGEBRA 1**

haha

**ALGEBRA 1**

haha

**physics - waves**

A five-slit system with 7.0 um slit spacing is illuminated with 630 nm light. Find the angular positions of the third and sixth minima.

**physics**

How much work does a refrigerator with a COP of 3.8 require to freeze 660 g of water already at its freezing point?

**physics**

The balloon contains 0.30 mol of helium starts at a pressure of 125 kpa and rises to an altitude where the pressure is 55.0 kpa, maintaining a constant 300 {\rm K} temperature. A)By what factor does its volume increase? B)How much work does the gas in the balloon do?

**physics**

How much energy becomes unavailable for work in an isothermal process at 440 K, if the entropy increase is 25 J/K

**physics**

You have exactly 1 L of ethyl alcohol at room temperature 23 C. You put it in a refrigerator at 4 C.What's its new volume?

**physics**

An open container holds ice of mass 0.540 kg at a temperature of -18.7 c The mass of the container can be ignored. Heat is supplied to the container at the constant rate of 790 J/minute. The specific heat of ice to is 2100 J/kg . K and the heat of fusion for ice is 334 * 10^3 ...

**Math 12A **

A rectangular building is to be built on a lot measuring 46m by 30m. The building will be surrounded by a strip of lawn of uniform width. If the lawn takes up 30% of the lot, how wide will the lawn be?

**Math 12A**

A rectangular building is to be built on a lot measuring 46m by 30m. The building will be surrounded by a strip of lawn of uniform width. if the lawn takes up 30% of the lot, how wide will the lawn be? Need you help

**physics**

Thank you drwls!

**physics**

Can friction (which causes heating) with the atmosphere ignite the object moving through the atmosphere? Can someone help me with this? Please!

**physic of modern technology**

A standard 2500„aC light bulb produces what fraction of its light at wavelengths that cannot be detected by the human eye as visible light? You can submit the answer as a decimal fraction or as a percent, so that if the answer were one half, you could use either 0.5 or 50...

**science**

if the voltage between the two plates of an electric air cleaner is 500 v, how fast would a 10 negative 12kg soot particle with -1* 10 negative 11 c of charge on it be moving if it went from negative plate to the positive? Explain your response

**science**

4. If the same two dust particles have -1.0 10-10 C of charge on one, and +3.2 C 10-10 C on the other, what is the force between them now?

**science**

2. Rank the following in the order of how much of a corona discharge they would produce; from highest to least (e.g., if D is highest, then A, C, and B are lowest. entering DACB). Explain your response. a. a large round metal ball hooked to a high voltage battery b. a sharp me...

**Physics**

hk

**Physics**

Mercury is poured into the open end of a J-shaped glass tube, which is closed at the short end, trapping air in that end. How much mercury can be poured in before the mercury overflows? Assume air to act like an ideal gas. The long and short arms are 1 m and 0.5 m long, respec...

**Math Approximation to find greater fractions**

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**chem**

The answer is CCl4 because it has the largest london forces.

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