# Posts by JES

Total # Posts: 50

**Math helppp**

Two small planes leave the Abbotsford airport at the same time. The first flies at 225km/h at a heading 320°, while the second flies at 190km/h at the heading of 70°. How far apart are they after 2 hours?

**Math helppp**

Thank you

**Math helppp**

Sin 8theta -sin 10theta= cot 9theta (cos 10theta - cos 8 theta)

**Math helppp**

Sin 8theta -sin 10theta= cot 9theta (cos 10theta - cos 8 theta) I'm unable to solve it

**Statistics**

The weight of a randomly selected shipping container follows an unknown distribution with mean 12 tons and standard deviation 2 tons. Your cargo ship always carries a load of 100 randomly selected shipping containers. a. What is the probability the load weighs more than 1,231 ...

**physics**

What mass of steam at 100¡ãC must be mixed with 388 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 45.0¡ãC? The specific heat of water is 4186 J/kg¡¤K. The latent heat of fusion is 333 kJ/kg...

**Algebra**

so does anyone know the answer?

**algebra**

11.6

**5th grade math**

Bianca is making scarf to sell has 33 and 37 pieces of green 41 pieces of red 3 pieces of fabric to make one scarf how much can it made

**CHEMISTRY HELP !!!!**

Fart

**science**

A rock has 76% of its radioactive isotopes. Is it young or old explain

**math**

write a number on each section of a hexagon so that the probability of getting an odd number is 1/3

**expressions**

A tank is filling with water from a natural spring. two days ago the water was 10 feet deep. yesterday the water was 12 feet deep. Assume that the water depth continues to rise at the same rate after today. How do you write this expression what is the expression?

**Geometry**

How do u find the lateral area of a 3-sided 1-based triangle with a slant height of 7 and a height of 5?

**Psychology Counselling**

I need to Interview a Counsellor. Can you suggest some questions can I ask about her job? Thanks!

**physics**

If something has a longer MHz, does it have a longer wavelength

**literary**

a. bold and ccofident

**physical science**

sorry, jj thomson

**physical science**

what are contibutions jj tomson made to the atomic theory and the experiment he conducted to find his dicovery

**Math/Derivative**

Had a few more >.< if you could possibly show steps so i know for future that would be awesome1 thanks! f(x)=√(lnx+x) and f(x)=2^(x^2)

**Math/Derivative**

Can someone help me figure out the answer and..possibly show the steps.. to finding the derivative of these 3 questions.. 1. f(x)=2(e^x) - x^2 2. f(x)=e^x/(e^x +1) 3. y=10^(√x)

**reading**

What is a question with a word with the root sid, sed, sit, or sedat?

**physics**

A ball of mass 0.4 kg, initially at rest, is kicked directly toward a fence from a point 20 m away, as shown below. The velocity of the ball as it leaves the kicker’s foot is 18 m/s at angle of 35 degrees above the horizontal. The top of the fence is 4 m high. The ball ...

**algebra**

What is the 32nd term of the arithmetic sequence where a1 = 13 and a13 = –59?

**ochemistry**

2 pi bonds in thiamine hydrochloroide

**statistics**

21/6

**Chemistry**

Will a double replacement reaction take place if a solution of sodium hyrdrogen carbonate is added to a solution of sodium chloride?

**chemistry class**

he just gave us the equation and he did mention beers law. thanks for the link

**chemistry class**

i have a Chemistry lab (level 2) final exam soon. our teacher told us that we would have % transmittance problems, can someone show me an examples (maybe from an online test) or a made up one, of what i might expect to find on my chemistry lab final? like an examples of a % ...

**chemistry help**

our teacher said on our final chemistry lab test there will be a question asking us to convert nanometers to wave numbers, anyone know what the question might be phrased like? also, im not sure i know how to convert, anyone have an example question with the steps?

**chemistry**

Of the following solutions, which has the greatest buffering capacity? A) 0.821 M HF and 0.909 M NaF B) They are all buffer solutions and would all have the same capacity. C) 0.100 M HF and 0.217 M NaF D) 0.121 M HF and 0.667 M NaF E) 0.821 M HF and 0.217 M NaF how do i know ...

**chemistry**

A flask is charged with 0.124 mol of A and allowed to react to form B according to the reaction A(g) →B(g). The following data are obtained for [ A ] as the reaction proceeds: Time (s) 1 10 20 30 40 Moles of A 0.124 0.110 0.088 0.073 0.054 how do i solve for B? for ...

**chemistry**

33) A first-order reaction has a rate constant of 0.33 min-1. It takes __________ min for the reactant concentration to decrease from 0.13 M to 0.088 M. A) 1.4 B) 0.13 C) 1.2 D) 0.85 E) 0.51 how can i set this up?

**chemistry**

The reaction CH3- N≡C → CH3- C≡N is a first-order reaction. At 230.3°C, k = 6.29 x 10^-4 s^- 1. If [CH3 -N≡ is 1.00 x 10^-3 initially, C] [CH3-N ≡ C] is __________ after 1.000 x 10^3 s. A) 5.33 x 10^-4 B) 1.00 x 10^-6 C) 4.27 x 10^-3 D) 2.34 ...

**chem**

ok thank you!

**chem**

For the elementary reaction NO 3 + CO → NO2 + CO 2 the molecularity of the reaction is __________, and the rate law is rate = __________. A) 2, k[NO 2][CO 2] B) 2, k[NO 3][CO]/[NO2 ][CO 2] C) 4, k[NO 3][CO][NO 2][CO 2] D) 4, k[NO 2][CO 2]/[NO 3][CO] E) 2, k[NO 3][CO] how...

**CHEMISTRY**

8) The reaction CH3- N≡C → CH3- C≡N is a first-order reaction. At 230.3°C, k = 6.29 x 10^-4 s^- 1. If [CH3 -N≡ is 1.00 x 10^-3 initially, C] [CH3-N ≡ C] is __________ after 1.000 x 10^3 s. A) 5.33 x 10^-4 B) 1.00 x 10^-6 C) 4.27 x 10^-3 D) 2....

**chemistry**

ok, thanks! i just wanted to be sure before i wrote down the answer.

**chemistry**

do i just write overall the steps and what happened?

**chemistry**

group 1 cations: im doing a lab report for a experiment we did today. we had a known and we checked it for pb^+2, Hg2^+2, and Ag^+1. we have to write our observations for: A Precipitation of group 1. what does this mean? i understand the other questions, the others are about ...

**chemistry**

study of kinetics these are the numbers: run 1 MnO4^-1 = 0.0125m h2c2o4= 0.266M average time: 371 sec rate of reaction: 1.68 x 10^-5 run 2 MnO4^-1 = 0.0125m h2c2o4= 0.532M ave time: 239 sec rate of reaction: 2.61 x 10^-5 run 3 MnO4^-1 = 0.0250m h2c2o4= 0.266M ave time 312 sec ...

**chemistry**

r2: o.532 r1: 0.266

**chemistry**

were doing an experiment. and i did the calculation for r3/r2 and r2/r1 each the answer is 2. but the teacher did this one the board in the example answer r2/r1= 2n log 1.23/log 2.0 = n where does the 1.23 come from? if the answer is a whole number do i have to do the log? if ...

**chemistry**

were doing an experiment. and i did the calculation for r3/r2 and r2/r1 each the answer is 2. but the teacher did this one the board in the example answer r2/r1= 2n log 1.23/log 2.0 = n where does the 1.23 come from? if the answer is a whole number do i have to do the log? if ...

**geometry**

This is not a test its from a summer school lesson... specifically submission 32.I know im looking at the same thing right now.

**Algebra**

Please check my answers. Thanks! Solve the polynomial equation. In order to obtain the first root, use synthetic division to test the possible rational roots. 5.2x^3-13x^2+22x-8=0 -My answer:{1/2,2,4} 6.x^3-8x^2-x+8=0 -My answer: {1,-1,8} Find the rational zero of the ...

**math**

300m

**English**

Where can I get a summary of "The Greatest Salesman in the World" by Og Mandino? Thank you for using the Jiskha Homework Help Forum. Sometimes you can get a short summary on the book jacket. There are many sites where you can purchase this book but the following site...

**Finance**

Bernie and Pam Britten are a young married couple beginning careers and establishing a household. They will each make about $50,000 next year and will have accumulated about $40,000 to invest. They now rent an apartment but are considering purchasing a condominium for $100,000...

**Finance**

Nancy Tai has recently opened a revolving charge account with MasterCard. Her credit limit is $1000, but she has not charged that much since opening the account. Nancy hasn't had the time to review her monthly statements as promptly as she should, but over the upcoming ...