# Posts by jane

Total # Posts: 1,649

**physics**

A propeller blade has a period of rotation of 0.400s. What is the speed of the outer tip of the propeller blade if the tip is 1.20m from the hub?

**physics**

i apply an 800 N force to the crate a. how long would it take the crate to travel 20m across the warehouse floor(in the direction that i am pushing it)? b. what is the magnitude and direction of the force of friction acting on the crate?

**chemistry**

in an element on the periodic table, which number tells you the how many electrons are in that element??

**Physics**

Forces of 10.6 N north, 20.8 N east, and 14.3 N south are simultaneously applied to a 3.76 kg mass as it rests on an air table. What is the magnitude of its acceleration?

**Physics**

Forces of 10.6 N north, 20.8 N east, and 14.3 N south are simultaneously applied to a 3.76 kg mass as it rests on an air table. What is the magnitude of its acceleration?

**Physics**

Forces of 10.6 N north, 20.8 N east, and 14.3 N south are simultaneously applied to a 3.76 kg mass as it rests on an air table. What is the magnitude of its acceleration?

**Physics**

An object is released from rest. How far does it fall during the third second of its fall?

**chemistry**

yes, ive asked multiple people and they've all told me the same thing. i'll study the question the way you said, i have a test next week and i wanted to know how to solve problems like this,

**chemistry**

i already posted this question, but im still confused on it. Dinitrogentetraoxide partially decomposes according to the following equilibrium: N2O4 (g) -> 2NO2 (g) <- A 1.00-L flask is charged with 0.400 mol of N2O4. At equilibrium at 373 K, 0.0055 mol ofN2O4 remains. ...

**Chemistry Class**

I got the problem from my book, and it says the answer is 0.87?

**Chemistry Class**

Dinitrogentetraoxide partially decomposes according to the following equilibrium: N2O4 (g) -> 2NO2 (g) <- A 1.00-L flask is charged with 0.400 mol of N2O4. At equilibrium at 373 K, 0.0055 mol ofN2O4 remains. Keq for this reaction is ?. hOw can i set up this problem?

**5th grade**

*MAXIMUM 18 SO IT IS THE LAST # IN THE SET. *12 IS THE MEDIAN SO IT HAS TO BE THE MIDDLE #. IN A STRING OF 12 NUMBER, 12 WOULD HAVE TO BE THE 6 AND 7 # TO BE IN THE MIDDLE. *FOR 7 TO BE THE MODE, IT HAS TO BE A # USED MORE THAN ANY OTHER. *RANGE IS 13 WITH THE MAXIMUM 18, ...

**algebra**

How do I figure (17 + a)^ = 2209 I know a = 30, but how do I get the answer?

**physics**

why does the filament of a bulb does not melt though it heats more than 3400 degree celcius

**physics**

A loaded dogsled has a mass of 400kg and is being pulled across a horizontal, paced snow surface at a velocity of 4.0m/s (N). Suddenly, the harness separates from the sled. If the coefficient of kinetic friction for the sled on the snow is 0.0500, how far will the sled coast ...

**physics**

a ball rolls off an incline at an angle of 30 below the horizontal at a velocity of 22m/s. how far from the base will the ball hit the floor if it lands in 3s?

**sentence writing**

hmm

**psychology**

Advertisers have been using the principles of classical conditioning for years in attempts to associate pleasant feelings with their products. One particular genre of ads (for beer) is particularly famous for doing so by placing scantily clothed women holding beer bottles on ...

**college organic chemistry**

Give the product of the substitution reactions. (CH3)2CHOSO3CH3 -> ?

**chemistry**

how many C atoms are in 1.50 moles of lactic acid?

**chemistry**

how many grams of NaOH do you need to prepare a 3.00 x 10^2 mL stock solution of 2.00 M NaOH

**Physics**

Free Fall: Tara throws a baseball down to Nathan. If she throws it with a speed of 2.0m/s and it lands in Nathan's hand with a speed of 10.0m/s, how far above Nathan is Tara?

**Physics**

Thank You.

**Physics**

Oh I see. What does that have to do with Galileo? I know about his objects with different masses don't determine which will fall first. Is there another concept?

**Physics**

It's moving 2 meters every second.

**Physics**

If I calculate the time, I get 1.3seconds. I assumed the ball is moving changes its velocity every 1.3 seconds?

**Physics**

A ball is rolling on a track with an intial velocity of 2.0m/s, E. If the acceleration is 1.5 m/s2, write a sentence that describes the ball's motion, i.e, what does the ball do each second?

**College Eng 2**

Im writting an argumentive paper on standardize test and I need an attention grabber.

**Chemistry**

2N2O(g) → 2N2(g) + O2(g) d[N2O]/dt = -5.8×10-4 M/s at a particular temperature and set of concentrations. What are d[O2]/dt and d[N2]/dt? d[O2]/dt = d[N2]/dt = What is the rate of the reaction? my answer for the first one im getting -.00016 and the second one 2.9e-...

**DrBob222**

2N2O(g) → 2N2(g) + O2(g) d[N2O]/dt = -5.8×10-4 M/s at a particular temperature and set of concentrations. What are d[O2]/dt and d[N2]/dt? d[O2]/dt = d[N2]/dt = What is the rate of the reaction? my answer for the first one im getting -.00016 and the second one 2.9e-...

**geography**

name at least 5 bodies of water ? what are they thank you

**Math homework**

oh... 3-(-4+8)=3-[-4+(-8)] 3-(-12) 3+12 15=3-[-4+(-8)] 15=3+12 15=15

**Math homework**

what are you solving for?

**Math homework**

3-8+3-8+2 =-5+3-8+2 =-2-8+2 =-10+2 =-8

**social studies**

It was an attempt to prevent colonial tensions with Native Americans by establishing the western boundaries of the 13 coastal colonies.

**CHEM**

It is an alloy of copper and zinc, therefore it is a mixture, since a compound is chemically formed while an alloy is just a dissolving of one metal in another.

**phsyics**

A baseball is thrown straight up. The drag force is proportional to v^2. In terms of g, what is the y-component of the ball's acceleration when its speed is half its terminal speed and it is moving up? In terms of g, what is the y-component of the ball's acceleration ...

**Chemistry**

Why would it be better to titrate a solution rather than just dilute it?

**University Research-level Biology**

Hello, this is an upper-level question, and I would sincerely appreciate help before Tuesday. I am reading a journal article, and there is one conclusion in it that I do not understand. It predicts a postsynaptic mechanism when EPSP amplitudes do not vary across trials, and a ...

**math**

expand 9x - 36 + x = 10x - 40 + 4 put like terms on the same side 9x + x - 10x = 36 - 40 + 4 simplify 0=0 Well your question doesn't make sense.

**English**

6) We have afternoon classes on Tuesdays from 2pm to 4pm. 7) I prefer scientific subjects such as physics and maths to humanities. 8) We are tested orally twice a term and we get three written marks each term (is there a better way of expressing it??). 9) A calendar and an ...

**Math**

Hello everybody

**physics**

At a picnic, there is a contest in which hoses are used to shoot water at a beach ball from three directions. As a result, three forces act on the ball, F1, F2, and F3 (see drawing). The magitudes of 1 and 2 are F1 = 55.0 newtons and F2 = 95.0 newtons. Using a scale drawing ...

**physics**

They will hit the ground at the same time. the accelerate at the same rate of 9.8m/s^2

**Math**

2x cubed minus x squared minus 6x plus 3. I know the answer is (2x-1)(x squared-3). Please help me with how they got that answer. Thank you!

**Math**

2x cubed minus x squared minus 6x plus 3. I know the answer is (2x-1)(x squared-3). Please help me with how they got that answer. Thank you!

**s.s.**

Spain and Portugal

**Geography**

Why is Cairo an important city?

**9th grade math**

Correct. 3/4 times 3/4 equals 9/16

**Geography**

THanks

**Geography**

Why is rice important to the Middle East?

**chemistry**

If a soda can is 11.8 cm tall, how many would it take to make a stack to reach the moon?

**calculus**

PLEASE write 2x+y=5 in polar form. a. -sqrt5 = r cos (theta -27degrees) b. sqrt5 = r cos (theta -27degrees) c. -sqrt5 = r cos (theta +27degrees) d. sqrt5 = r cos (theta +27degrees) is the answer c.

**Health, Safety, and Nutrition**

a or d

**health**

prefix of osterperosis

**math**

=8-2[3-(15x+5)] =8-2[-15x-2] =8+30x+4 =30x+12

**Finance**

I have this same problem. I just cannot figure out if the labor content is needed to calculate the NPV. Any ideas?

**math116**

I need help with 3(x-1)+5=15x +7-4-4(3x+1)+ 3

**Math**

An equilateral triangle is one in with all three sides are length. If two vertices of an equilateral trangle (0,4) and (0,0), find the third vertex. How mant of these triangles are possible? How would you slove this??

**calculus**

Thanks I see where I made the mistake Thank you!

**calculus**

The total area enclosed by the graphs of y=10x^2–x^3+x y=x^2+19x This is a really long problem I keep getting the answer of 20.25 but it is incorrect I don't know where I am going wrong?

**finance**

Leggio Corporation issued 20-year, 7% annual coupon bonds at their par value of $1,000 one year ago. Today, the market interest rate on these bonds has dropped to 6%. What is the new price of the bonds, given that they now have 19 years to maturity

**American History**

What two colonies were resistant towards slavery?

**Chemistry**

If a diagram describes an initial state of the reaction A2 + B2 --> 2AB. Would the picture with more AB products represent the result at the higher temperature?

**Chemsitry**

I don’t understand how to write this equation. Write an equation relating the concentration for a reactant A at t=0 to that at t=t for a first-order reaction. Define all the terms, and give their units. Do the same for a second- order reaction. -Would it be the rate law ...

**Chemistry**

How would you solve this problem? C4H8(g)--> 2C2H4 Determine the order of the reaction and the rate constant based on the following pressures, which were recorded when the reaction was carried out 430 C in a constant volume vessel. Time (s) P(C4H8)(mmHg) 0 400 2,000 316 4,...

**other**

why do u say d??

**other**

some child psychologists have concluded that___ is the strongest predictor of both scholastic and career achievement A. physical illness b. respect for authority c. emotional well being d inherited intelligence

**other**

Encouraging children to eat certain foods their families enjoy aroud the holidays is an example of?

**College Physics**

An airplane flies 200 km due west from city A to city B and then 240 km in the direction of 31.0° north of west from city B to city C. (a) In straight-line distance, how far is city C from city A? (b) Relative to city A, in what direction is city C?

**chemistry**

A silver ring contains 0.0134 mmol Ag. How many silver atoms does it contain?

**chemistry**

A silver ring contains 0.0134 mmol Ag. How many silver atoms does it contain?

**English**

8. We enjoyed some entertaining numbers on the program.

**Math**

what is .50 times 95000 lbs?

**chemistry**

Why moles?

**chemistry**

A chemical problem may be presented to you in units of moles, mass, or volume. Which one of these can be directly used in arithmetic no matter what the conditions are?

**marketing**

You are working in the product development department of a company that creates household products. Your team has come up with an idea for a revolutionary new cleaning product. Using the seven phases of new product development as a guide, describe how your company will develop...

**Stats**

A participant in a cognitive psychology study is given 50 words to remember and later asked to recall as many as he can of them. This participant recalls 17. What is the (a) variable, (b) possible values, and (c) score? I just don't understand what it all means. I've ...

**chemistry**

contrast ionic and molecular substances in terms of the types of attractive forces that govern their behavior

**English**

I can't send you my homework. What shall I do?

**Bus.**

P $26 X Q 14 = $ 364 - Cost $238 = $126 , Which is max Profit among those.

**How Children learn**

what kind of responses do behaviorists look for in their students?

**Taxes**

3580

**algebra**

find the LCM of (7 4z), (49-16zsquared), and (7-4z)

**math**

is the answer 2/25

**math**

you roll a fair number cube twice. what is the probability of rolling two 3's if the first roll is 5

**math**

is the answer 1/657800

**math**

a sock drawer contains 10 white socks, 6 black socks, and 8 blue socks. if 2 socks are chosen at random, what is the probability of getting a pair of white socks?

**physics**

2m/s

**physics**

A spherical convex mirror has a radius of curvature of magnitude of 20cm. At what distance from the mirror should an object be placed to obtain an image that is virtual, four times smaller and upright.

**lal**

how to say FUN in a PLURAL way my sentence is fundraising is the easiest and (fun) way in school

**math**

Solve for x: (4x + 1)1/2 = 3

**Math**

$20768 the percentage for this is 21% please help me through the formula on how this is done get 21%

**math**

how do do you find the percentage of $38676?

**quote**

what does this mean? " when you judge another you do not define them ,you define yourself."

**quote**

what does this quote mean? " the surest way to corrupt the youth is to instruct him to hold in higher esteem those who think alike , then those who thinks differently"

**singular/plural**

is it right!?

**singular/plural**

sara looked happy going to school, but it was odd because she hated school. maybe it had do with BOY CRUSHES

**singular/plural**

my entire snetence is this : sara looked happy going to school, but it was odd becuz she hated school. maybe it had to do with boy crushes

**singular/plural**

i want to say this word in a plural way is this the correct way boy crushes or boys crushes