Wednesday

July 30, 2014

July 30, 2014

Total # Posts: 32

**physics**

A pilot heads her plane with a velocity of 275 km/hr north. If there is a strong wind of 130 km/hr blowing east, what is the magnitude of the velocity of the plane in reference to the ground.

**Math**

Which fraction has the greatest value and how did u get the answer....1/8,5/12,9/10

**math**

Yumi's grandparents presented her with a gift of $11,000 when she was 8 years old to be used for her college education. Over the next 9 years, until she turned 17, Yumi's parents had invested her money in a tax-free account that had yielded interest at the rate of 5.5%...

**physics**

A heavier mass m1 and a lighter mass m2 are 18.0 cm apart and experience a gravitational force of attraction that is 9.70 10-9 N in magnitude. The two masses have a combined value of 5.65 kg. Determine the value of each individual mass.

**English - Ms. Sue help**

You Kids need to start reading you homework more in stead of having her helping you with every single homework assignment and its not even that shes giving you the answers for free but yet their right in front of your face but you wont open your eyes and realize that. DO YOUR ...

**Finite Math (college)**

EventProbability Too much enamel0.27 Too little enamel0.2 Uneven application0.35 No defects noted0.43 (1) What is the probability of a paint defect? (2) What is the probability of a paint defect which includes an improper amount of paint? (3) What is the probability of a paint...

**ELA**

oK thanks

**ELA**

How about this? The pencil fell and it landed beneath my desk. Beneath is preposition?

**ELA**

Write 3 sentences with a preposition in each. 1.I waited outside for an hour for the concert to start. Outside is preposition? 2.He went down the elevator to go to the second floor. down is preposition? 3.We went inside each room to find the missing key. Inside is preposition?

**Social Studies**

Is the first one Battle of Gettysburg?

**Social Studies**

Is the first one wrong

**Social Studies**

One of the early battles of the war was the (Battle of Gettysburg,First Battle of Bull Run). Battles of Gettysburg? People in many U.S. cities paid their respects to President Lincoln after his (assassination,impeachment). assassination? Republicans in Congress called for the ...

**Math**

If a tire rotates at 150 revs/min when the truck is travelling 40km/h, what is the circumference of the tire? 4.44 meters

**Math**

If twenty people in a factory make 43 shoes in [(3)^.5] / 2 hours, then how many shoes do they make in an eight hour day? 397?

**math**

four rectangular pictures each have an area of 2400cm2 the sides are all multiples of 5 what sizes could the pictures be

**6th grade math**

a ration of 6/4..6 reds to 4 blues...how many reds would there be if they were a total of 35 beads

**math**

triangle abc is congruent to triangle wxy

**chemistry**

SO2 + H2O --> H2SO3

**Chemistry**

Hydrogen and methanol (CH3OH) have both been proposed as alternatives to hydrocarbon fuels. a) Write balanced chemical equations for the complete combustion of hydrogen and the complete combustion of gaseous methanol. Combustion reaction for hydrogen: 2H2(g)+ O2 --> 2H2O(l)...

**chemistry**

oops, disregard the last part it didn't line up right. It will just be 58.14/ 18.02 which gives you moles

**chemistry**

I believe you would get the molar mass of C4H10 and also the molar mass of water (H20). So C4H10 gives us a molar mass of 58.14 grams/mol and water gives us a molar mass of 18.02 grams/mol. You then would set it up 58.14 grams x mol/ 18.02 grams. Grams cancel and leave you wit...

**Science**

Lysosomes are organelles found in all animal cells. Lysosomes have enzymes that break down food so it's easier to digest ( this is more on the intracellular level). So the enzyme is breaking up macromolecules ( proteins, lipids, etc.)

**Chemistry**

Oh that's right, thank you!

**Chemistry**

So the grams must cancel each other out when we divide and it leaves us with just kJ? So -11.3 kJ

**Chemistry**

Mg(s) + 2 HCl(aq) --> MgCl2(aq) + H2 (g) DeltaH= -4.6x10^2 kJ How much heat is evolved when 0.598 g of Mg are dissolved in excess HCl? I'm not sure how to go about this problem. What I thought to do was: 0.598 g x 1 mol Mg/24.31 g Mg x 2 mol HCl/ 1 mol Mg x 36.46 g HCl/...

**Chemistry**

Okay I believe I got it, thank you so much for the help! :)

**Chemistry**

I tried doing it that way already but it just doesn't look correct, because I set up PV=nRT to n=PV/RT. Entering the numbers I would get ((0.0658 atm)(0.2853))/((0.08206 L*atm/K*mol)(315K)) and I would get 0.000726 moles. After that would I just go straight to the number o...

**Chemistry**

Consider the following reaction: 2 SO2 (g) + O2 (g)----> 2 SO3 (g) If 285.3 mL of SO2 is allowed to react with 158.9 mL of O2 (both measured at 315 K and 50.0 mmHg), what is the limiting reactant and theoretical yield of SO3 in moles? If 187.2 mL of SO3 is collected (measur...

**math**

I am not sure how to write a fraction as an expression using a negative number for an exponent other than -1? Please help ex: 1/25 and then using a fraction of 1/9to the second power.

**Western Civilization**

Thank you, come again!

**Western Civilization**

I have five questions asked here. Feel free to answer just one of them, only, please use the numbering system I have set up here. Thanks so much! 1. Why do you think World War Two erupted so soon after World War One, which was supposed to have been “The War to End All War...

**Western Civiliztion**

In 1875, which of these four political philosophies best addresses the political realities of Europe? Why? ----------------------------------- 1. A group of Austrian conservatives, adherents to the principles advocated by Prince Clemens von Metternich: Our best model for a goo...

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