Friday
April 18, 2014

Posts by jam


Total # Posts: 36

Statistics
75.3033 is the answer

Physics
A boy and his skateboard have a combined mass of 64 kg. If he is moving with a speed of 3.2 m/s, and collides with a stationary skateboarder whose mass (including his skateboard) is 96 kg, with what speed will the two skateboarders move immediately after the collision? assume ...

math calculus (please help me)
In 1970, the total enrollment in public universities and colleges in a country was 5.1 million students. By 2004, enrollment had risen to 14.3 million students. Assume enrollment can be modeled by exponential growth. (a) Estimate the total enrollments in 1980, 1990, and 2000. ...

Grade 12 Calculus
Determine the absolute extrema of each function on the given interval. Illustrate your results by sketching the graph of each function. a)  =  − 4 + 3 , 0 ≤  ≤ 3 b)  =  − 1 , 0 ≤ &#...

umuc
Discuss qualitative and quantitative test you would perform to detect or quantify monosaccharides in solutio. Discuss the chemical basis of the tests.

umuc
Draw and name the different structural forms of L-fructose that would exist in aqueous solutions

Biostatistic
The following replicate calcium determinations on a blood sample using atomic absorption spectrophotometry (AAS) and a new colorimetric method were reported. Is there a significant difference in the precision of the two methods?

Biostatistic
An enzymatic method for determining alcohol in wine is evaluated by comparison with a gas-chromatography (GC) method. the same sample is analyzed several times by both methods with the following results (% ethanol). Enzymatic method: 13.1, 12.7, 12.6, 13.3, 13.3. GC method: 13...

Chemistry
Calculate the heat needed at 0 degrees Celsius in each of the following: joules to melt 65.0g of ice

physics
A parallel plate capacitor has square plates of side L= 12 cm and a distance d= 2 cm between the plates. Half of the capacitor areae is filled with a dielectric with k1 = 35. the other half is filled with a different dielectric with k2 = 8. The effective( equivalent capacitanc...

physics
A 2.0 nF parallel plate capacitor with a sheet of mylar (k= 3.1) filling the space between the plates is charged to a potential difference of 90 V and is them disconnected. How much work would be required to completely remove the sheet of mylar from the space between the two p...

Math
"Solving a system involving three unknowns." We're supposed to use substitution or elimination. 3d+e-2f=-14 2d-3e+4f=-23 5d+4e-10f=-13

chemistry
I understand what you're saying, but in my text book it says a buffer is a weak acid or base with its salt, so is that not always true?

chemistry
So then the common answer for any titration with a strong acid there is no buffering/buffer region?

chemistry
it doesn't right because for like HCl it doesn't really have a Ka?

chemistry
so in strong acid strong base titration does the pH=pkA?

chemistry
Do strong acid strong base titrations have a buffer region?

ORGANIC CHEM I
hOW MANY POSSIBLE STEREOISOMERS DOES MENTHOL HAVE ?

ORGANIC CHEM I
A PROCESS THAT INVOLVES SYMMETRICAL BOND BREAKING AND BOND MAKING IS A(AN) ?

algebra
Write the equation in y=mx+b form. Find the equation of the line that passes through the points (8,-15) and (-2,5) I am unable to get this answer!

math
2/x+3 = o solve for x. Is this where I go: 2= 0 x+3=0?

math
x-2y= -5 2x+y= -5

algebra
How long will it take a car traveling at 60 mph to overtake a bus traveling at 40 mph if the bus had a 1.5 hour head start?

algebra
A train can travel 280 miles in the same time that it takes a car to travel 140 miles. If the train's rate is 40 miles per hour faster than the cars, find the average for each.

problem solving
The amount of water used to take a shower is directly proportional to the amount of time that the shower is in use. A shower lasting 21 minutes requires 12.6 gallons of water. Find the amount of water used for a shower lasting 10 minutes.

Algebra
There are 220 calories per 32 grams of cereal mix. Find how many calories are in 55 grams of the cereal mix.

social studies
what aspects of a fast food restaurant would interest sociologists

Chemistry
First you multiply 10.0 with 540cal/1 g of H2O. To calculate the amount of heat added to (or removed from) a sample of water, the mass of the sample is mulitipled by the heat of vaporization, which is 2260. As before, no temperature change occurs during a change of state. the ...

Chemistry
First you multiply 10.0 with 540cal/1 g of H2O. To calculate the amount of heat added to (or removed from) a sample of water, the mass of the sample is mulitipled by the heat of vaporization, which is 2260. As before, no temperature change occurs during a change of state. the ...

math subject
make (a) the subject 2a+squareroot of 2a^2=10

math subject
help

math subject
make (a) the subject 2a+ã2a^2=10 please and thank you (the 2a^2 is all spuare rooted)

math
5:05-1hr= 4:05 4:05-15mins =3:50 bcuz: 15mins can't be substracted from 5mins so u cross the hr 4 to 3 then add 5mins to 60mins to get 65mins, and then u minus 15mins to get 50mins so the answer will be 3:50 and not 3:55.

accounting
750,000

French
I want to ask is it Je suis etudiante or Je suis une etudiante?

French
Are my sentences correct? I am japanese and I am also canadian. Je suis japonaise et je suis canadienne aussi. I am a student at university. Je suis une etudiante a l'universite. I live in richmond, a city in Canada. J'habite a richmond, une ville au Canada. I like to ...

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