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Jeanne

Questions (25)

How many moles of Ca(NO3)2 contain 2.95 x 10^24 oxygen atoms?I set up the conversions like this: 2.95 x 10^24 / 6.022 x 10^23 to
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The coldest and hottest temperatures ever recorded in the United States are -83°F and 135°F, respectively. What is the speed
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2. 602 views
A rubber ball is dropped from height h. It bounces 27" (60%). Write an equation you can use to find height h
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2. 744 views
A simple pendulum consists of a ball connected to one end of a thin brass wire. The period of the pendulum is 1.45 s. The
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2. 1,441 views
What is the mole ratio between all compounds of this reaction:HC2H3O2 + NaHCO3 = NaC2H3O2 + H2O + CO2
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2. 1,671 views
The concentration of hydroxide ions in the antacid, milk of magnesia, is 5.2x10^-4 M. Calculate the concentration of hydronium
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2. 2,097 views
How many grams of CuSO4 are there in 219 grams of an aqueous solution that is 20.2% by weight CuSO4
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2. 507 views
Mr. Garcia is going to pain a mural on one wall. There is a rectangular shaped window that is 24 in. wide and 36 in. high on the
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2. 476 views
In this problem, use g = 9.80 m/s2.Bizarro, located at Six Flags New England, in Agawam, MA, is the name of one of the top-rated
1. 1 answer
2. 661 views
A box, with a weight of mg = 25 N, is placed at the top of a ramp and released from rest. The ramp measures 4.40 meters
1. 6 answers
2. 1,072 views
A box with a mass of 7.00 kg is at rest on a ramp that is at an angle of 20 degrees with the horizontal. The coefficient of
1. 15 answers
2. 1,135 views
Two boxes on a horizontal surface, as shown in the figure above, are moving together under the influence of a horizontal force,
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2. 729 views
An object that floats in water has ___________ in water?
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2. 414 views
Hi!For an orgo lab we had to isolate the following from milk powder and now I have to calculate the percentage yield, but first
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2. 543 views
A sample of hexane and octane is injected into a gas chromatograph equipped with a nonpolar column. Predict which one will have
1. 3 answers
2. 1,193 views
How do we correct the problem if during TLC development the solvent ran off the plate?
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2. 425 views
For the "ISOLATION OF CHLOROPHYLL AND CAROTENOID PIGMENTS FROM SPINACH" Lab we have to think about how we can correct the
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For the "ISOLATION OF CHLOROPHYLL AND CAROTENOID PIGMENTS FROM SPINACH" Lab we have to think about how we can correct the
1. 1 answer
2. 518 views
A 9 percent salt-water solution is mixed with 4 ounces of an 18 percent salt-water solution in order to obtain a 15 percent
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2. 434 views
How many ways are there to choose a three-digit lottery number? Note that numbers like 003, 014, 222, 232 or 123 are all
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[3-7(1-8)]parentheses first 1-8= -7 -7*-7= 49 3-49= -46 am I correct?
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2. 358 views
How do you separate a mixture of iron and sulphur by means of a phsyical test without using a method
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2. 471 views
How do you diffirentiate between a sample of iron and a sample of iron sulfur by means of a chemical test
1. 2 answers
2. 431 views
You and Bruce Willis are upright in a natatorium of liquid with containers of 5.3 gallons and 3.75. You need exactly 4 1/2
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2. 465 views
I am doing a extra credit project for social studies. Does anyone have any ideas for the project for the preamble of the u.s.
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2. 900 views

Answers (16)

So, lets call this numerator n. If written into a fraction, it wold look something like this. n/n+2 You add one to both n+1/n+3 You should be able to solve from here Cheers. Jeanne
OK, so lets call the numerator n. The denominator is 7 more than twice the numerator. Put into an equation, it would look like this. n/2n+7 You add 7 to both, and it will look like this: n+7/2n+14 You should be able to solve from here. Cheers! Jeanne
Ohh I see! Thanks a lot!
and the "i" looking thing is the coefficient of friction
im sorry it should be cos theta for all of them
I know the work done is W = ì X mgcosè X d and W is Ui+ W= Kf which is 54-(25*3.3)=-33.5 so W = ì X mgcosè X d and so ì= (W/(mgcosè X d)) and mg=25N so what is cosè? and i think d is the hypotenuse?
yeahh
Yes, your equation is right so if you just plug in your given numbers for P=mgcos20-(mgsin20/uS) you should get the correct answer.
I am trying your equation from for P. I have a feeling it will come out as a negative force and if you apply a perpendicular force it will only increase the contact force and thus not move the box, but let me see.
okay, just making sure
thus you assume Fgx' is mgcos20 and Fgy' is mgsin 20?
Yeah I got that, but I was hoping you could explain what you defined as the x' and y' component of each like in terms of cos and sin seeing that we might not be on the same page so i cant check ur answers exactly if i use something different.
same for Fgx'=uS(Fgy'-P)
Can you explain what Hx'+Fgx'=uS(Fgy'-Hy') means? It's hard to elaborate when the variables aren't defined.
Thanks sooo much!!!
Hi there Please please help me. I'm a mom trying to find the answer for my child. Do not have intenet at home and have been to the library for 3 hours and one th internet at work for 5 hours and still cannot find an answer. I stumbled across the website by

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