Friday

April 18, 2014

April 18, 2014

Total # Posts: 189

**Physics**

A 920 kg sports car collides into the rear end of a 2300 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.5 m before stopping. The police officer, knowing that the coefficient of kinetic friction between tires and road is ...

**Physics**

I got that vi=10.29 then when I sub in I get that v=11.23 but this is the wrong answer. Am I doing something wrong?

**Physics**

Please Help!!! A 920 kg sports car collides into the rear end of a 2300 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.5 m before stopping. The police officer, knowing that the coefficient of kinetic friction between tir...

**Physics**

Suppose the roller coaster in Fig. 6-41 (h1 = 30 m, h2 = 11 m, h3 = 20) passes point 1 with a speed of 2.10 m/s. If the average force of friction is equal to one fifth of its weight, with what speed will it reach point 2? The distance traveled is 50.0 m.

**Physics**

A child in a boat throws a 5.40 kg package out horizontally with a speed of 10.0 m/s, Fig. 7-31. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 25.0 kg and that of the boat is 40.0 kg.

**Chemistry**

51grams/132.14grams=.386moles

**english**

I need help on writing an essay on how entrepreneurship affects me

**alg I**

3/5. 5/5 - 2/5 = 3/5 chance of pulling out a green chip.

**Physics**

Dr. Miller pulled a wooden crate at a constant accelerationof 1.23 meters per second per second with a forceof 752 newtons at an angle of 22 degrees above the horizontal. The coefficient of kinetic friction between the crate and the floor was 0.347. Find the mass of the crate.

**Biology**

How does the structure of macromolecules such as proteins act as an index of relatedness between species?

**math**

if sam earned $4,000 and gave 1/5 wawy and invested 1/2 of the remaining amount how much did he have left?

**math(unit rate)**

$3\4LB

**math**

joe borrows $4,000, the loan is for 18 months at 5% interest, whats the total amount due on the loan?

**Chemistry II**

Why is YBa2Cu3O7 a super conductor? Explain Chemistry and Structural bases.

**Chemistry**

Show, with equations, why the solution from which BaSo4 is precipitated cannot be allowed to be more then 0.01-0.05M in HCl.

**chemistry**

How many monosaccharides most likely make up this molecule: C 10H20 O10

**physics**

As part of a training program, an athlete runs while holding 8.00 weights in each hand. As he runs, the weights swing through a 30.0 arc in . His hands are 72 from his shoulder joint, and they are light enough that we can neglect their weight compared with that of the 8.00 wei...

**Math**

Alex has 7 dimes and 3 nickels.What fraction of the coins are dimes?

**algebra**

Suppose that Maria has 140 coins consisting of pennies, nickels, and dimes. The number of nickels she has is 9 less than twice the number of pennies; the number of dimes she has is 19 less than three times the number of pennies. How many coins of each kind does she have?

**College Algebra **

The population of the Earth is approximately 6 billion people and is growing at an annual rate of 1.9%. Assuming a Malthusian growth model, find the world population in 44 years.

**college chem**

Write a chemical equation to express the fact that, at 0 °C, ice melts by absorbing 334 J of heat per gram of ice.

**CHEMISTRY**

A single drop of water is injected into a balloon at 25C that contains ammonia, at 1 atm. What will happen to the V of the balloon?Assume Henry's constant is ~0.02 atm/M

**physics**

suppose you exert 150N on your refrigerator and push it across the kitchen floor at constant velocity. a. is the friction force equal and opposite to your 200N push? explain b. does the friction force make up the reaction force to your push?

**chemistry**

Exactly 10mL of water at 25 degrees C was added to a hot iron skillet. all of the water was converted into steam at 100 degrees C. If the mass of the pan was 1.20 kg and the molar heat capacity of iron is 25.19 L/mol*C, what was the temp change of the skillet?

**chemistry**

During a strenuous workout, a student generates 2000 kJ of heat energy. What mass of water would have to evaporate from the student's skin to dissipate this much heat?

**algebra**

How do you graph this liear inequality 2y greater than equal to 4x-6

**physics**

Water flows into a swimming pool at a rate of 9.59 gal/min. If the pool dimensions are 30.9 ft wide, 47.6 ft long and 13 ft deep, how long does it take to fill the pool? (1 gallon = 231 cubic inches). Answer in units of minutes.

**Chemistry**

Thank you so much DrBob222

**Chemistry**

Please check this over and see of they are right...if they are not can you please tell the the right answer and explain how you got it. I think I am getting myself confused. Thank you. Write the neutralization reaction for each of the following. Balance the equations. a. HI(aq...

**algebra**

Select the ordered pair from the choices below that is a solution to the following system of equations: 4y = x - 13 2x + 16y = 20

**Chemistry**

A balloon is filled to a volume of 1.0 102 mL at a temperature of 38.0°C. The balloon is then cooled at constant pressure to a temperature of 1.00 multiplied by 102 K. What is the final volume of the balloon?

**science**

whatis the mass of a electromanetic roller coaster?the weight?

**college**

Assume that the life expectancy of U.S. males is normally distributed with a mean of 80 years and a standard deviation of 4 years. What is the probability that a randomly selected male will live more than 85 years?

**math**

Argus company makes three products: A, B, and C. Each unit of A costs $4, each unit of B costs $2, and each unit of C costs $1 to produce. Argus must produce at least 20 As, 30 Bs, and 40 Cs combined. Minimize Argus's costs

**physcis**

a 16990kg airplane lands with a speed of 91m/s on a stationary aircraft carrier deck that is 115m. find workk done by nonconservative forces in stopping the plan.

**6th grade - English**

i need help with nt and ftthn

**economics**

If businesses believe consumption will increase six months from now, everything else held constant, and they begin to increase investment, what do you predict will happen to aggregate demand?

**4th grade**

who was the first artist in the world

**spanish**

how do you conjugate the verb preocuparse in the present tense in all forms??? Please if you know know how to do it correctly tht wld greatly appriciated!!

**9th grade**

4y-9=15

**Business Fin**

The market’s required return on Gitche Gumee Oil Company stock is currently 13.8 percent. If the expected return on the market portfolio is 12.6 percent and the risk-free rate is 3.5 percent, what is the beta of Gitche Gumee stock?

**9th grade**

I am reading a book called To kill a mocking bird. and had a couple questions. . . -what is the dare with which dill challenges Jem?

**language**

its on my homework so i don't know but thanks for the help

**language**

how would you abbreviate Jay Paul?

**math**

3/5 divided by 6/7

**antonyms**

old/young..... i need answer for nt,ftthn,ststnd .... missing the vowels..i hate it

**ethics 125**

Amanda she is not refusing the question because she does not understand it, or because she is just refusing. She is saying this answer is unfair and if she was that student she would refuse to answer the question because she believes is biased and kind of sounds like it is ste...

**algebra**

write the following where possible as a single number in index form: 2^3x2^4

**Critical Thinking**

o In the future, how will thinking critically influence the ways that you: Read? Write? Process information?

**Psychology**

Summarize the effects of one type of sexual dysfunction that can affect both men and women. What are some factors that may cause this type of dysfunction? What treatments may help individuals who experience this type of dysfunction

**american literature**

what does her basket full of linen white mean??

**Psychology**

Ok, Well What I think this means is, something like this, but I am not sure: Jennifer would want to take over the counter medications to help reduce the headaches and the backaches. Also a over the counter medication to help the indigestion that has been occuring. Jennifer is ...

**Psychology**

Jennifer is a 29-year-old administrative assistant married to Antonio, an Italian engineer, whom Jennifer met four years earlier while on a business trip for her marketing company. The couple now lives in Nebraska, where Antonio works for the county's transportation depart...

**8th grade pre algebra**

i am having trouble with solving inequalitys... how do you solve t+6>-3

**english**

what does mark twain think about slvery?

**science**

_______a rhythmic disturbance that carry energywithout carrying matter

**British Literature**

Scanning Sonnet 73- That time of year thou mayst behold When yellow leaves, or none, or few do hang Upon those boughs which shake against the cold, Bare ruined choirs where late the sweet birds sang. Im horrible at scanning. But I would love to have some pointers to make an at...

**4th grade**

a God given ability that in inherited rather than learned.

**Algebra**

thanks

**Algebra**

Can anyone explain this equation. Simplify by removing factors of 1. q^2-64/(q+8)^2

**Algebra 1**

3x-27/55÷x-9/15x my answer is =3(11x^2-4)/11x is this correct.

**Algebra**

there is no parentheses in the math problem

**Algebra**

3x-27/55÷x-9/15x my answer is =3(11x^2-4)/11x is this correct.

**history**

thanks for your help

**history**

WE have to lable characteristics of leaders. I have Adolph Hitler, Benito Musiline, and Fidel Castro. For all of them i have Intelligence, ethics, physical strength, military prowess, common sense, courage, power, confidence, and i need 4 more... can anyone think of four more ...

**ChEmIsTrY**

I2O5=??

**math riddle ALGEBRA WITH PIZZAZZ**

WHAT IS GREEN AND MAKES HOLES

**math riddle ALGEBRA WITH PIZZAZZ**

whom should you see at the bank if you needed to borrow money

**-6(5+x)+(13x+1)**

-6(5+x)+(13x+1)

**unscramble**

If you rearrange the letters "CARNEF", you would have the name of?

**socialstudies**

what are Zapatistas

**math**

how to do u solve this kinda equation 13=[n+3]

**Math**

Please help me with the below questions. Write a rational approximation, to the nearest thousandth, for each number: 1) Square root 14 2) Square root 1.4 3) Pie 4) Pie -3

**Math**

How would you write 0 as a fraction?

**modern world history**

how colonial rulers remain influential?

**modern world history**

what was the result of tanzania's socialism?

**math**

how do you find the area of a triangle using trigonomet

**math**

how do you label the axes of a complex plane

**math**

how do you find reference angles in the four quadrants

**math**

what is simple intrest

**math**

what are the effects of changing the base of an exponential function

**math**

how do you express the inverse of a exponential equation

**math**

how do you express the inverse of exponential equation

**math**

thanks

**math**

what are the general equations for the conic sections 1)parabola 2)circle 3)ellipse 4)hyperbola 5)inverse hyperbola

**Math**

when are triangles congruent

**English**

In Julius Caesar, what is there about Caesar that attracts such a strong following? First of all, be sure to carefully read the character analyses at this site: http://www.sparknotes.com/shakespeare/juliuscaesar/ Also, from history, we know that Caesar was an immensely success...

**word unscramble**

Solidedahnr

**math**

What is outliers? how do you solve this problem? please give me some answers. In statistics outliers are data points that very far from the mean. There are some rules of thumb for determining them, but I don't recall them right off hand and don't want to reach for the ...