Wednesday

July 30, 2014

July 30, 2014

Total # Posts: 1,694

**math**

6x=-36

**PHYSICS HELP!!**

3.) Draw a free body diagram of a boat being pulled at an accelerated rated by a truck down a highway.

**PHYSICS HELP!!**

#2.) Draw a free body diagram for the following situation: a.) A 0.15 kg running shoe is pushed to the right, with a constant velocity, across a wet concrete floor with an applied force of 3.5 N. b.) Calculate the normal force exerted by the concrete onto the running shoe.

**PHYSICS !!!HELP**

#1.) If the force of gravity on a human is 539 N determine the mass of the human.

**Math**

An airplane is flying due west at a velocity of 100 m/s. The wind is blowing out of the south at 5 m/s. What is the magnitude of airplane's resultant velocity?

**Physics**

During the second stage of a rocket launch the rockets upward velocity increases from 980 m/s with an average acceleration of 33 m/s (upward). How long did the acceleration last?

**Physics**

A boat which travels 100 km (N), then 40 km (N), and finally 80 km (S). The entire trip takes 6.5 hours. A.) Calculate the total displacement of the boat B.) calculate the velocity of the boat

**Physics **

In the human body, blood travels faster in the largest blood vessel, the aorta than in any other blood vessel. Given an average speed of 30 cm/s, how long would it take the blood to travel 5 cm?

**Physics**

Classify the following measurements as scalar of vector quantities. A.) 15 s B.) 4.2 m ( up) C.) 100 km/h (S) D.) 2.8 kg

**Physics**

A cheetah can run with a speed of 29 m/s. Determine the distance travelled by a running cheetah in 8.6 s

**Physical Sciences**

How do I calculate the initial velocity of a ball if i've only given a maximum height of 12metres above its starting point?

**engineering**

the pringles manufacturing company tells you that they are switching to a potato supply that has a higher moisture content than those used previously. The new supply, after being mashed an cooked, prior to drying for pringles production, now contains 70% moisture content. they...

**engineering**

Your friend, a 75 kg mountain climber is suspended from a cliff by a rope. Calculate the tension in the rope, in Newtons, when you lift your friend to safety. If the rope can withstand 1.25 kN of stress per square centimeter of cross-sectional area, what minimum diameter of ro...

**Math**

A moving truck fills up a shipment at an od adress, at (-2,1). It travles 7 blocks south and 6 blocks east to the new adress. What is the location of the new adress? PlEASE ANSWER THIS AS FAST AS POSSIBLE!! Amanda

**7th grade Social Studies from another school**

I have gratitude toward this website and I have used it to check my work and get 100% I agree with all of the statements Emily has made. Thankyou! ttyl!

**Negatives**

32x45=__ +-67 ?

**Physics**

A crate is sliding down a ramp that is inclined at an angle 37.9 ° above the horizontal. The coefficient of kinetic friction between the crate and the ramp is 0.330. Find the acceleration of the moving crate.

**Us history**

Describe the economic policy of merchantilism in early America

**jmhs help**

Which of the following statements about learning styles is false? A. An individual should study using techniques that utilize his or her preferred learning style. B. An individual can learn using only his or her preferred learning style. C. Understanding your preferred learnin...

**biology**

The Eastern skunk cabbage, which blooms in very early spring, produces chemicals that smell like decaying meat. This plant has probably become adapted to mate with the assistance of A) butterflies. B) honeybees. C) flies. D) wind.

**math**

27 weeks.

**chemistry**

the answer is 15 right

**chemistry**

how many liters of ammonia are required to react with 1 mole of oxygen gas at 850 degrees centigrade and 5 atm in order to produce nitrogen monoxide and water vapor at the same conditions

**Physics**

Glycerin is poured into an open U-shaped tube until the height in both sides is 20 {\rm cm}. Ethyl alcohol is then poured into one arm until the height of the alcohol column is 20 {\rm cm}. The two liquids do not mix. What is the difference in height between the top surface of...

**7th grade math Ms. Sue please**

HOW did you figure that out? I'm so confused...

**Physics**

A 125 ball has a kinetic energy 33.6 What is the magnitude of it's momentum? What is the speed?

**Physics**

Your sofa won't fit through the door of your new sixth-floor apartment, so you use a 1.19 motor to lift the 88.6 sofa 18.3 from the street. How much time does the lift take?

**Physics**

What power is needed to lift a 358 crate of bricks from the ground to the top of a 25.0 -high building in 1 minute?

**Geometry**

EF = 3x-16, FG = 2x-7, and EG = 17, find the values of x, EF, and FG

**chemistry**

What mass of chromium is contained in 50 ml of 6.55 M cr2(cro4)3? a. 85.2g b. 0.188g c. 68.1 g d. 17.0g

**chemistry**

what total mass of product will form when 1.38 L of c3h8 at 25 degrees C and 760 torr react with 75.0 mL of 5.33 M h2cr04? a. 48.2g b.114g c. 342g d. 9.71g

**chemistry**

what total mass of product will form when 1.38 L of c3h8 at 25 degrees C and 760 torr react with 75.0 mL of 5.33 M h2cr04? a. 48.2g b.114g c. 342g d. 9.71g

**chemistry**

What mass of chromium is contained in 50 ml of 6.55 M cr2(cro4)3? a. 85.2g b. 0.188g c. 68.1 g d. 17.0g

**algebra**

no, the homework was 50 questions, these are just the ones I've tried to do several times and failed miserably at.

**algebra**

Completely factor the following expressions. Please show work/explain t^2+4tv+4v2 4x^2-8x-12+6x 144-9p^2 5c^2-24cd-5d^2 w^2-17w+42 256z^2-4-192z^2+3 2a^2c^3-14bc^3+32c^3d^2 35g^2+6g-9 3j^3-51j^2+210j

**math**

to solve an inequality, you need to get y by itself, so you subtract -5 (subtracting a negative is pretty much adding a positive) from BOTH sides y+ (-5) > -6 +5 +5 ---------------- y >-1

**Biology**

More surface area means more capacity/ability for gas exchange. Having many smaller alveoli gives more surface area. Imagine having a single bowling ball vs dozens of baseballs.

**chemistry**

A buffer is made by dissolving HC2H3O2 and NaC2H3O2 in water. Write an equation that shows how this buffer neutralizes added acid. Express your answer as a chemical equation. Identify all of the phases in the answer.

**trig**

A 600,000-cell bacteria culture is needed for a lab experiment, but you only could purchase 1,000 cells. If the cells double each day, exactly how long will it be before the experiment can be run? Create a model for the bacteria. If the experiment is in seven days, how many ce...

**math**

Suppose that you are taking a course that has three exams which count for three-fifths of your grade and a final which counts for two-fifths of your grade. On your first three tests your scores on were 75, 80, and 74. To get an B in the course, you must have an average of at l...

**Geometry **

In triangle EFG, M<F=3(m<G), and m<E=m<F-30degree. Find the measure of each angle.

**Ethics & Justice Administration**

If I am looking to support my pro capital punishment theories which of the following ethical theories would best support my stance? I must use two. Absolutism, ethical formalism, utilitarianism, hedonism-stoicism, natural law, ethics of virtue, ethics of care, egoism, cultural...

**Physics**

Alright but does anyone know how to solve this?

**Physics**

Thanks for the thought anyways!

**Physics**

How is asking for help on a homework help site cheating?? I don't know where to start...

**Physics**

Two fraternities are in a tug of war. Theta Chi is pulling with a total force of 4,748 newtons to the east and Tau Kappa is pulling with a total force of 3,969 newtons to the west. What is the magnitude and direction of the resultant? Which team will win? Is it better to pull ...

**math**

Find the accumulated amount A, if the principal P is invested at an interest rate of r per year for t years. P = $24,000, r = 7%, t = 6, compounded monthly $ ?

**Physics Can you help me get started**

A 24-g ice cube floats in 180 g of water in a 100-g copper cup; all are at a temperature of 0°C. A piece of lead at 92°C is dropped into the cup, and the final equilibrium temperature is 12°C. What is the mass of the lead? (The heat of fusion and specific heat of w...

**math**

Find the present value of $31,000 due in 4 yr at the given rate of interest. (a) 6%/year, compounded quarterly $ ? (b) 3%/year, compounded quarterly $ ?

**math**

Find the present value of $31,000 due in 4 yr at the given rate of interest. (a) 6%/year, compounded quarterly $ ? (b) 3%/year, compounded quarterly $ ?

**math**

Find the present value of $53705.69 due in 5 yr at an interest rate of 8%/year compounded continuously. $ ?

**math**

Find the present value of $31,000 due in 4 yr at the given rate of interest. (a) 6%/year, compounded quarterly $ ? (b) 3%/year, compounded quarterly $ ?

**Math**

Find the effective rate corresponding to the given nominal rate. (Round your answer to the nearest hundredth of a percentage point.) (a) 4%/year, compounded quarterly ? % (b) 3%/year, compounded monthly ? %

**Math**

Find the effective rate corresponding to the given nominal rate. (Round your answer to the nearest hundredth of a percentage point.) (a) 4%/year, compounded quarterly ? % (b) 3%/year, compounded monthly ? %

**Drama**

I have to find a 6-8 minute monologue for my HSC and i cant find a good site to help me if anyone has any good answers please help me i need it soon!!

**statistics**

what is the probability of winning a lottery with 8 numbers drawn from 52 numbers (assume you buy 1 ticket)?

**science**

what is an artery thattakes the oxygen rich blood to the rest of the body from the heart

**math**

If p is an odd prime, prove that (2/p)=(-1)^[(p^2-1)/8]

**Chemistry**

10, 122, 299, --> 162, 5, 122, 60, 60, 188

**Chemistry**

Please write the balanced chemical equation for reaction the following chemical reaction ozone gas, O3, reacts with 3,3,4,4,5,5-hexanmethyl-1-hexyne, H-C≡C-C(CH3)2-C(CH3)2-C(CH3)2-CH3 to produce carbon dioxide gas, CO2 , and water gas, H2O When balancing the equation , p...

**physics**

A large balloon of mass 237 kg is filled with helium gas until its volume is 318 m3. Assume the density of air is 1.29 kg/m3 and the density of helium is 0.179 kg/m3. (b) Calculate the buoyant force acting on the balloon.________N (c) Find the net force on the balloon and dete...

**calculus**

a particle is moving counterclockwise around the circular path whose equation is x^2+y^2=100 of the abscissa of the particle is increasing by 72in/sec at a point where x=8 find the rate of changeof the cordinate(y) at this point

**chemistry**

If 92.75 mg of Na2CO3 is dissolved in 0.5mL of water, what would be the normality of the solution after the addition of 0.67 mL of water.

**english**

Baldwin uses many different writing techniques in the essay. Find instances of concrete description of a person of place, action reflection, and strong argumentative assertions. How do these techniques further his specific purposes?

**Biology**

In humans, W=widows peak while w=normal hair line and A=attached earlobes while a= unattached earlobes. A heterozygote in both traits reproduces with a similar heterozygote in both traits. What is the chance of any one child having the same genotype of the parents?

**Macroeconomics**

The graph has a SRAS going up from GDP 13.7 and 110 price level GDP 14.0 and 120 price level GDP 14.2 and 130 price level

**Macroeconomics**

Cannot attach graph! a. If the actual price level exceeds the expected price level reflected in long-term contracts, real GDP equals _______ and the actual price level equals _______ in the short run. b. The situation described in part (a) results in a(n) _______ gap equal to ...

**chem**

a new compound composed of just Hex-Nuts and bolts is formed.A 13.7 Kg sample of the new compound is separated into its component elements with the following result 3.84 kg. of hex-nuts and 9.90 kg of bolts. 1. How many hex-nuts are present in the 13.7 kg sample 2. how many bo...

**world geography**

The answer is cultural

**world geo**

Physical is the answer

**Chemistry**

Just saw that I forgat to notice that the amount of potassium hydrogenphtalate was 5.12 grams. Also, it was enough with two readings within ± 0,01 cm3

**Chemistry**

We had a lab where the standard solution was potassium hdrogenphthalate. In this we added 3 drops of phenolphtalein indicator and then we ran sodium hydroxide into the solution. We did four different flasks and the final readings for these then were 26.00 cm3, 32.00 cm3, 26.10...

**Chemistry**

Using data from the following reactions and applying Hess's law, calculate the heat change for the slow reaction of zinc with water (answer must be in kJ/mol Zn): Zn(s) + 2 H2O(l) ----> Zn^2+(aq) + 2 OH-(aq) + H2(g) (ΔHrxn = ?) H+(aq) + OH-(aq) ----> H2O(l) (&#...

**Chemistry**

The complete combustion of 1.283g of cinnamaldeyde (C9H8O, one of the compounds in cinnamon) in a bomb calorimeter (Ccalorimeter=3.841 kJ/C) produced an increase in temperature of 130.32 C. Calculate the molar enthalpy of combustion of cinnamaldehydy (delta H comb) (in kilojou...

**Chemistry**

So q/1.283 = 3841(130.32) I know you have to divide by the molar mass which I found to be 132.169 but Im not sure which number I divide it by.

**Chemistry**

The complete combustion of 1.283g of cinnamaldeyde (C9H8O, one of the compounds in cinnamon) in a bomb calorimeter (Ccalorimeter=3.841 kJ/C) produced an increase in temperature of 130.32 C. Calculate the molar enthalpy of combustion of cinnamaldehydy (delta H comb) (in kilojou...

**Chemistry**

Phthalates used as plasticizers in rubber and plastic products are believed to act as hormone mimics in human. The value of deltaHcombustion for dimethylphthalate (C10H10O4) is 4685 kJ/mol. Assume 1.035 g of dimethylphthalate is combusted in a calorimeter whose heat capacity (...

**Chemistry**

Ok I got the answer!! Thank you!!

**Chemistry**

Ok, yeah I somehow read that as a label not as part of the equation, so 4685*(1.035/194.21)= 24.97 24.97*1000=24967.69 So then would the final equation be: 24967.69=7.293(Tfinal-20.142) Thank you by the way Im just really struggling with this.

**Chemistry**

How do you convert 4848.975 to J?

**Chemistry **

Phthalates used as plasticizers in rubber and plastic products are believed to act as hormone mimics in human. The value of deltaHcombustion for dimethylphthalate (C10H10O4) is 4685 kJ/mol. Assume 1.035 g of dimethylphthalate is combusted in a calorimeter whose heat capacity (...

**english**

I don't know what this one is. Thats why i'm here for help!

**english**

Which one of the following statements is true for the base forms of verb? A. when the subject of a sentence is singular, add "-s" to the base form. B. Add "to" to the base form to create an adjective. C.Do not use a base form with plural subjects. D.Add &qu...

**english**

In this sentence, what is the antecedent of the pronoun it? A. her B. Carla C.house D.work?

**english**

which sentance contains an incorrect plural? A.The parties ended around midnight. B. If wishes were horses, beggars would ride. C.We spotted the foxs late in afternoon. D.I hate traffic delays.

**english**

A. river

**english**

We left King ranch on a december day in 1873. On the Santa Fe trail, we hit bad weather. The Red river was flooded and it took us four days to get the Cattle across. All in all, it was a hard trail drive, but we got our Longhorns to the railroad at Abilene. Which of the follow...

**nouns pronouns and adjectives**

Which of the following shound be capitalized? a. river b railroad c drive d weather?

**chemistry **

what is the chemical name and lewis structure of NO3 -2

**Polynomials**

A rock is thrown upward at a speed of 10 metres per second. The height of the rock above the ground is given by the formula h=10t-2.0t². Where h is the height in metres above the ground and t is the time in seconds. Then what is height after 5 second?

**chemistry**

how are the elements in a pair of isotopes the same? how do they differ? And also if you know anything about the atomic structure phrase apeman i could use some serious help right now i have a test tommoro and i cant remember all the material

**chemistry**

a new compound composed of just Hex-Nuts and bolts is formed.A 13.7 Kg sample of the new compound is separated into its component elements with the following result 3.84 kg. of hex-nuts and 9.90 kg of bolts. 1. How many hex-nuts are present in the 13.7 kg sample 2. how many bo...

**bookkeeping**

Using your computer, you create a file for an existing costumer. When you're finished, you should a. overwrite the existing file by giving the new file the same name. b. use Save as to save the new file under a different name c. coordinate the old and new files b giving bo...

**Physics**

In a head-on collision, a car stops in 0.14{\rm s} from a speed of 24{\rm m}/{\rm s} . The driver has a mass of 67{\rm kg} , and is, fortunately, tightly strapped into his seat. What force is applied to the driver by his seat belt during that fraction of a second?

**math-algebra**

one pump can empty a pool in 5 days, wheras a second pump can emtpy pool in 7 days. how long will it take the two pumps, working together, to empty the pool?

**chemistry**

Would you expect a chemical change to be always accompanied by a physical change?Pls. Explain

**chem**

Write the complete ionic equation for Cu(NO3(aq)+K2S(aq)and namd write the formula for the spectator ions in this reaction? This is what I got pls. check it: complete ionic equation: Cu^19aq)+K^1(aq)+S^-2(aq)=K^1(aq)+NO3^-1(aq)+Cu2S(s) net ionic equation: Cu(aq)+s^-2(aq)=Cu2S(...

**Chemistry **

a student conducts and experiment by reacting 39.6g CuSO4 with an excess of MgS. The reaction yields 9.5599g CuS. What is the percentage yield? MgS+CuSO4=CuS+MgSO4

**Geometry**

Find the measure of each angle in a triangle with angles: x, (x-135), and 1/10 x

**chemistry**

A 27.00 mL sample of an unknown H3PO4 solution is titrated with a 0.110 M NaOH solution. The equivalence point is reached when 25.78 mL of NaOH solution is added. What is the concentration of the unknown H3PO4 solution? The neutralization reaction is: H3PO4(aq) + 3NaOH(aq) -&g...

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