Sunday

April 20, 2014

April 20, 2014

Total # Posts: 30

**Introduction to Physics**

What is the electric charge on the calcium ion in calcium chloride, CaCl2?

**life orientation**

In 10-15 lines discuss 10 ways in which pollution impacts on the community.provide references

**life orientation**

In 10-15 lines critically discuss 5 ways in which the pollution as the environmental problem impacts on the community.provide relevent sources to support your claim

**Math**

Find the present value of $9500 in 6 1/2 years if money earns 7.5% compounded continuously.

**Physics**

A wooden plank is inclined at and angle of 23 degrees above the horizontal. A 2.0 kg box attached to a rope is is pulled up the incline. The coefficient of kinetic friction between the box and the wooden plank is 0.15. What does the tension in the rope is the box moves up the ...

**Chicago Virtual Charter School**

A movie theater charges $7 for adults, $5 for school-age children, and $3 for babies. A group of people went to the theater. There were the same number of school-age children as babies and the number of adults was the same as school-age children and babies combined. If the gro...

**english**

can someone give me the summary of sherwood anderson's " a death in the woods"?

**math**

Find the entries of the following matrices: (a) the 2 ×2 matrix M for the reflection across the line y = x. (b) the 2 ×2 matrix N for the 90 degree counterclockwise rotation about the origin. (c) the product MN;what transformation does this represent? (d) the produ...

**math/geometry pls help**

A coin of radius 1 cm is tossed onto a plane surface that has been tesselated by right triangles whose sides are 8 cm, 15 cm, and 17 cm long. What is the probability that the coin lands within one of the triangles?

**Geometry**

A coin of radius 1 cm is tossed onto a plane surface that has been tesselated by right triangles whose sides are 8 cm, 15 cm, and 17 cm long. What is the probability that the coin lands within one of the triangles?

**physics**

Two vectors have magnitudes 3.0 and 4.0. How are the directions of the two vectors related given the following conditions? 1) The sum has magnitude 7.0. (a)They both point in the same direction. (b)They each point in opposite directions. (c) They are perpendicular to each othe...

**physics**

(a) How long does it take for a golf ball to fall from rest for a distance of 12.5 m?in seconds (b) How far would the ball fall in twice that time?in meters

**chemistry**

what is mmHg?

**chemistry**

how many liters of CO2 are in 50kg of carbon dioxide at STP?

**Chemistry 101**

Iron reacts with hydrochloric acid to produce iron (2) chloride and hydrogen gas.Fe (s)+ 2 HCL (aq) -FeCl2 (aq) + H2 (g).The hydrogen gas from the reaction 2.2g of iron with excess acid is collected in a 10L flask at 25 degrees celcius. What is the pressure of the hydrogen gas...

**Chemistry 101**

If 12.0g of molecular oxygen, O2, is required to inflate a balloon to a certain size at 27 degree celcius, what mass of molecular oxygen required to inflate it to the same size and pressure at 81 degree celcius?

**Chemistry 101**

what is mmHg

**Chemistry 101**

A gaseous compound has a density of 0.355 g/L at 17 degree celcius and 189 mmHg. What is the molar mass of the compound?

**Chemistry 101**

You have a sample of gas in a flask with a volume of 250 mL. At 25.5 degrees Celcius, the pressure of the gas is 300 mm Hg. If you decrease the temperture to -5.0 degrees celcius, what is the gas pressure at this lower temperture?

**Chem 101**

How many liters of CO2 are in 50 kg of carbon dioxide at STP?

**Chemisty**

What are the factors that cause the difference between measured pH and calculated pH in titration.

**social studies**

what is the time change and distance from nova scotia to england?

**spanish**

can you please help me unscramble these two spanish words? codraram,and coyenr. thanks!

**literature**

Trace and explain in your own words the literary periods We will be happy to critique your work or thinking, but we do not do the work for you. Do you have a question about this assignment? We will be happy to critique your work or thinking, but we do not do the work for you. ...

**Literature**

A pschoanalytic approach to the reading of literature views conflict and character of any literary work as a reflection of the needs,emotions,status of mind and subconcious desires of the author.By extension,in literature,this approach tries to explain why Oedipus kills he'...

**history**

do you know any website that tells us anything about the ancient greek's landscapes? Already answered -- above. =) I'm sorry. But I'm a different person then LP. :D Your IP address is identical to LP's, so you're either in the same house or the same school...

**Chemsitry**

What is the purpose of cell matching? (1 mark) I've been researching for quite a long time now. This question relates to using spectrometry. Can anyone help me? Thanks! I let this question go yesterday because I connected it with cells is biology. On rereading today I see ...

**Chemistry**

Why does Beer’s Law apply only to relatively dilute solutions and not concentrated ones? Why is it important to take absorbance readings of a solution at its wavelength of maximum absorption? (1 mark) This questions are related to spectrometry. Cana nyone help me with the...

**Chemistry - Hybridization**

Can anyone help me with this questioin pleasee? Describe the orientation and relative energy levels of sp2 and sp3 orbitals with respect to unhyberdized orbitals (1s, 2s, 2px, 2py, 2pz orbitals) 1s and 2s are spherical. 2px, 2py, and 2pz are at 90o to each other (mutually perp...

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