Total # Posts: 385
Choose the correct word to complete each sentence. 1. Despite wanting to pass the exam, Julia just couldn't get down to revising. She seemed to have a mental ___ about it. a. brick b. gap c. block d. space 2. When the counsellor listened to George's problems, her non-...
December 7, 2010
Maths - Probability
Tickets numbered 1 to 1000 were sold in a raffle for which there was one prize. Mr Kahn bought all the tickets containing at least one '3' because '3' was his lucky number. What was the probability of Mr Kahn winning?
December 4, 2010
A toddler is on a playground swing. When she is right in the middle going forward (to the right), then ... a).her tangential acceleration is maximal to the right. b) her tangential acceleration is zero. c) her tangential acceleration is maximal to the left. d) her kinetic ...
November 21, 2010
A freely rotating merry-go-round on a playground has a moment of inertia of 312 kgm2 and a radius of R=2.5 m. It is rotating with ω0=2.8 rad/s when a kid of mass 45 kg is standing on its outer rim. Neglecting friction, what is going to be the angular velocity of the merry...
October 22, 2010
Earth Space Science
What type of motion would have to occur to move or displace the fixed color lines produced by a gas like helium or hydrogen toward the 400 nanometer mark on the spectrum scale?
May 4, 2010
fractions and decimals
15/86 is the fraction then divide 15 by 86 and you get 0.1744 that would be one option for row one. I'm not sure if you can make improper fractions but if you can it could also be 86/15 as a fraction then divide 86 by 15 5.7333 repeater. I am assuming you could arrange the...
April 25, 2010
The answer for (7+5i)+(-4+2i) is 3+7i. But I got -38-6i. I combined -28 and 10i^2 to get -38, and I combined -20i and 14i to get -6il So all together this was -28+-6i+-10, which resulted in -38-6i. Could you please tell me where I went wrong?
October 15, 2009
Downstream Upstream Distance=rate x time -rate: 1 hour -rate: 1 hour -time: x+y -time: x-y -distance: 17km -distance: 6km System of equations: x+y=17 2x=23 Plug in 11.5 for x x+y=17(rewrite one of the equations:either is fine) x-y=6 x=11.5km/h in one of the 11.5+y=17(plug in ...
May 26, 2009
Determine wether the following acids are strong or weak? NOTE: all numbers in the chemical compounds below are subscripts belonging to the element before it, NOT COEFFICIENTS. a.)HCl b.)H2SO3 c.)HNO2 d.)H3PO2 e.)HNO4 f.)H2SO5 g.)HI
January 14, 2009
year 8 art
I've got loads of art homework and there is one bit i'm struggling with i have to use a digital camera take a picture of a household object then distort the image using a graphics package on a computar in four different ways and im finding it hard to understand. Thanks
December 29, 2008
A sheet of aluminum foil has a total area of 1.000 ft squared and a mass of 3.636 grams. What is the thickness of the foil in millimeters? (Density of Aluminum is 2.699 grams/cm cubed.)
September 12, 2008
Calculate the theoretical pH after 2.50 mL and 9.50 mL of NaOH has been added in both the titration of HCl and of HC2H3O2. Indicate if the volume of NaOH is before or after the equivalence point.
May 9, 2008
What determines whether an object is a net emitter or a net absorber of radiant energy? Wood is a better insulator than glass. Yet fiberglass is commonly used as an insulator in wooden buildings. Explain.
January 30, 2008
10 people are going canoeing/tubing. some people will tube, some will canoe. tubes are $7 each. canoes are $11 each. tubes hold one person. canoes hold three. if you want to spend exactly $50, how many canoes and tubes can you buy? what would be the equation for how many tubes...
October 17, 2007
10 people are going canoeing/tubing. some people will tube, some will canoe. tubes are $7 each. canoes are $11 each. tubes hold one person. canoes hold three. if you want to spend exactly $50, how many canoes and tubes can you buy? i know this is a linear combination question...
October 17, 2007
I really don't understand this stuff for example: 9b-3b+34<2b-10 and 7a+3=24 letters represent variables so they can be anything really. Once you understand this step then the rest of the problem can start to make sense. Inequalities tell you whether something is ...
February 28, 2007
Why Is London so Big & Why is is where it is? Is it something to do with the river? London has a very long history and therefore is difficult to describe in such a condensed space. Go here and click on the different links to read about London in the different eras: http://www....
January 4, 2007
Me again! - Science (Friction and Weight)
Okay. I have a test coming up soon, and I was wondering how to explain Weight and Friction. Mass is the stuff inside an object, so what is weight? And how do you describe friction? Thanks for reading, hope you can help. Weight is the attraction of an object as a result of ...
November 22, 2006
How is Sodium used in the body? I need to know this for some Food Tech reaserch. Thanks. Thank you for using the Jiskha Homework Help Forum. The body uses sodium to regulate blood pressure and blood volume. Sodium is also critical for the functioning of muscles and nerves...
November 19, 2006
my 9 year old daughter is learning about the caribbean on what i don't know please could any one help with any info on the caribbean or latin america wikipedia should have some information. West Indies - Bahamas. Bermuda Triangle? Last but not least perhaps your daughter ...
October 30, 2006
Hi, I'm doing a History Project on the First Emperor of China, Qin Shihuangdi, and wondered if anyone could tell me when he was born and when he died? I have been on lots of websites but the dates are all in the wrong order, making it look like he died before he lived. ...
October 14, 2006
Religious Education (R.E)
Hello, I am doing some homework on the Langar (Free Kitchen for Sikhs), and would really appreciate it if someone could tell me some food they might have on the menu? For instance: What they could have for Starters, Main Course and Dessert. I just need a little help as I...
October 10, 2006
what happens to the particles in a liquid as the temperature frops? I don't know what happens as the temperature frops; however, if it DROPS :-), and we are talking about a pure liquid and not a solution, then the molecules become less and less energetic and the molecules ...
September 30, 2006
PLEASE SEND ME THE ANSWERS TO MY EMAIL ADDRESS Find the midpoint of PQ if P(-7, 11) and Q(1, -4). Find the area of the rectangle with vertices B(8, 0), T(2, -9), R(-1, -7) and C(5, 2). Find the area of a triangle with vertices (0, 0), E(3, 1) and F(-2, 6). Given a rhombus with...
July 12, 2006