Sunday

April 20, 2014

April 20, 2014

Total # Posts: 36

**chemistry**

a compound contains only carbon hydrogen and oxygen analysis of a sample showed that it contained by mass 53.4% carbon and 11.1% hydrogen . what is the simplest formula for this compound .. step by step plese

**Science (Physics)**

Gravity on the surface of the moon is only 1 6 as strong as gravity on the Earth. What is the weight of a 30 kg object on the Earth? The acceleration of gravity is 10 m/s 2 . Answer in units of N What is the weight on the moon? Answer in units of N What is the mass on the eart...

**Finance**

Consider the following information and calculate the required rate of return for the Winkler Investment Fund. The total investment fund is $2 million. Stock Investment Beta ----- ---------- ---- A $ 200,000 1.50 B 300,000 -0.50 C 500,000 1.25 D 1,000,000 0.75 The market requir...

**calculus (point me in the right direction please?)**

f'= 3x2 + 8x f'(5)= 3(25) + 8 (5)= =75+40=115 so u replace x by 5 in fx and u substract

**finance**

r= 3.5+1.08(10-3.5)

**chemistry**

calculate the pH of a 0.50 m solution of HCN. Ka for HCN is 4.9*10^-10 (The chemical equation for this.)

**physics**

A ball whirls around in a vertical circle at the end of a string. The other end of the string is fixed at the center of the circle. Assume that the total energy of the ball-Earth system remains constant. (a) What is the tension in the string at the bottom? (Use the following a...

**Chemistry**

Thanks you Dr.Bob222. So the overall idea is that dissociation decreases molar mass and association does the opposite when a solute dissolves in a solvent. (How do you identify if either reaction occurs? Just wondering.)

**Chemistry**

So in this case, that a small amount of your unknown failed to dissolve in the t-butanol, it would effect the molar mass, just depending on the mass of both substances?

** chemistry**

Lab on Determining hard water Not sure if I answered this currently, not completely sure how to explain either. If a student has a non-zero blank correction, but forgets to include that correction in his/her calculations:? a. Would his/her calculated [EDTA] be correct, too hi...

**chemistry**

Thanks

** chemistry**

Lab on Determining hard water Not sure if I answered this currently, not completely sure how to explain either. If a student has a non-zero blank correction, but forgets to include that correction in his/her calculations:? a. Would his/her calculated [EDTA] be correct, too hi...

**MSD**

Pat and Kris are roommates. They spend most of their time studying (of course), but they leave some time for their favorite activities: making pizza and brewing root beer. Pat takes 4 hours to brew a gallon of root beer and 2 hours to make a pizza. Kris takes 6 hours to brew a...

**MATH**

x/9 < or = -3 x times 1/9 < or = -3 x< or = -3/1/9 x< or = -27 sorry i don't have the symbols on my keyboad, but i hope this helped

**Algebra 1**

m= y2-21/x2-x1 m= -6-(-4)/4-6 m=-2/-2 therefore m= 1 the answer is b) good luck :)

**Chemistry**

Calculate the amount of heat required to take 3.00kg of ice at -10 degrees Celsius to 115 degrees celsius.

**5th grade math**

Mr. Hightower recorded the amount of each project that had been completed at the end of the week. The line plot describes the information he recorded. What fraction of the projects were complete?

**physics**

When driven by a 120 Hz vibrator, a string has transverse waves of 31 cm wavelength traveling along it. (a) What is the speed of the waves on the string& (b) Is the tension in the string is 1.2 N, what is the mass of 50 cm of the string?

**physics**

Two blocks with masses m1 = 7 kg and m2 = 4 kg are connected with a rope and move on two surfaces of a right-angled wedge as shown in Fig. 6.6 Given that θ1 = 37 °, θ= 53°, μ= 0.2, and μ= 0.1, find the acceleration of the blocks

**Mechanics M1**

A rabbit runs in a horizontal straight line ABC across a field (a)the rabbit runs from rest at A with a constant acceleration of 0.8 m/s^2 and reaches B after 3 seconds, find its speed at B

**math**

The sum of the firest 9 terms of an A.P is 72 and the sum of the next 9 terms is 71, find the A.P

**math**

The sum of the firest 9 terms of an A.P is 72 and the sum of the next 9 terms is 71, find the A.P

**geometry**

if a measure of an angle is -2x^2+19x and the measure of it's supplement is 4x^2-6 what's the measure of angle and supplement

**statistics**

1. Use the following information about a group of college students: Fifty percent are taking Algebra. Sixty percent are taking Biology. Thirty percent are taking both Biology and Algebra. A student from the group is selected at random, calculate the following: a) The probabil...

**chm**

Silver chloride, often used in silver plating, contains 75.27% .Calculate the mass of silver chloride required to plate 195 of pure silver.

**English**

what is the meaning of the heaven were let loose

**Physic**

I am having trouble with some of this question. 'A student standing at the top of a cliff shoots an arrow from a height of 30.0 m at 25.0 m/s and an initial angle of 32.0 degrees above the horizontal. b. How high above the landscape under the cliff with arrow rise? assume ...

**Art**

Okay! Thank you so much

**Art**

I can see the motion which is the line for visual element and i can see the balance in design element... Am i right?

**Art**

Okay but what are the elements in it? i mean in that painting for visual element is it the color ? and for design element is it balance?

**Art**

Yes , what i mean is for 1.Visual element (line,shape and mass, color, light, texture and pattern, space,time and motion) 2.Design element ( unity and variety, balance, emphasis and subordination, scale and proportion, rhythm) So what i need is to find one painting that includ...

**Art**

i need to choose a paint where design element and visual element in 1 paint could you help me to choose that paint and telling me what elements in it thank you

**science**

How does a doorbell work?

**Math - natural log**

Express the given quantity as a single logarithm. ln(1+x^8)+ln(x)- ln(sin(x))

**communications**

comper btween informative, persuasive,and positive messages

**AP CHEM!**

ROFL YOU'RE STUPID we're doing this in class right now.... :/

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