Friday

September 4, 2015
Total # Posts: 39

**physics**

An LED is a device that emits light of a particular frequency when the voltage applied across the LED reaches a certain value. This effect can be used to measure Planck’s constant. In the circuit shown below the switch is closed and the potentiometer is adjusted until the...
*August 14, 2015*

**Geograhy **

The role that played by mining in the economy of south africa
*August 10, 2015*

**Statistics HELP**

There are two bags each containing red balls and yellow balls. Bag A contains 1 red and 4 yellow balls. Bag B contains 3 red and 13 yellow balls. Alva says that if we choose one bag and draw one ball from that bag you should always choose bag B if you are trying to draw a red ...
*February 6, 2015*

**Statistics **

An experiment consists of tossing a fair coin twice. The student reasons that there are three possible outcomes: two heads, one head and one tail, or two tails. Thus,P(HH) 1/3
*February 6, 2015*

**Statistics Helps**

ms sue how did you this? did carter multiply the 40 select marbles by the 20 exactly marbles?
*January 29, 2015*

**Statistics Helps**

Carter has a large marble collection. Carter knows that he has exactly 20 blue marbles in his collection, but does not know how many marbles he has in all. Carter mixes up his marbles and randomly selects 40 marbles. Of the 40 marbles that he chose, 4 were blue. How many ...
*January 29, 2015*

**Physics**

A compact car, with mass 725kg, is moving at 115km/h toward the east.....find the magnitude and direction of it's momentum. Draw an arrow on your sketch showing the momentum
*January 28, 2015*

**Derivative**

if g(x)= 5x^6-3/x^2, find the 3rd and 5th derivative of the function. Pls help!
*January 4, 2015*

**maths**

If I borrow RM 100,000 to buy a house and I have to pay RM 3000 a month into an account that charges 5 % p.a compounded monthly, how many payments are needed to fully settle the loan?
*January 4, 2015*

**algebra**

6. Vicky factored 30x2 + 76x + 48 as follows: Line 1 30x2 + 76x + 48 Line 2 30x2 + 36x + 40x + 48 Line 3 6x(5x + 6) + 8(5x +6) Line 4 (6x + 8)(5x + 6) A. factored Did Vicky completely factor the polynomial? Justify your response by explaining why it is is completely or by ...
*January 20, 2014*

**math**

Juan buys 18 meter of wire. He cuts the wire into pieces of 3 meters long.how many pieces of wire dose he cut?
*October 22, 2013*

**english**

Im not really good at English so I need some help with this punctuation Add punctuation to the following excerpt. Writing under the name of Diedrich Knickerbocker Washington Irving aimed his potent satire at as diverse topics as political rivals such as Thomas Jefferson to the...
*November 29, 2012*

**english**

Add punctuation to the following excerpt. Writing under the name of Diedrich Knickerbocker Washington Irving aimed his potent satire at as diverse topics as political rivals such as Thomas Jefferson to the very ideal of looking back on the past affectionately: A fine lady, in...
*November 29, 2012*

**ENG102**

Question 1. A car moves 26 km due east then 14 km due north. It then turns along a path running north-east with 15 km, then 17 km due west. If the time for the entire journey is 2 hrs, Find; (a) the car’s average speed in m/s (b) the car’s average velocity in km/h . ...
*May 1, 2012*

**ENG102**

Question 1. A car moves 26 km due east then 14 km due north. It then turns along a path running north-east with 15 km, then 17 km due west. If the time for the entire journey is 2 hrs, Find; (a) the car’s average speed in m/s (b) the car’s average velocity in km/h
*May 1, 2012*

**statistic**

a shipment of 40 television sets contains 3 defective units. How many ways can a vending company can buy five of these units and receive no defective units
*April 17, 2012*

**Math**

A circular flower bed has a radius of 33.2 m. An insect crawls around the edge of the flower bed at a rate of 2 meters per minute. About how long does it take the insect to crawl around the flower bed?
*January 29, 2012*

**8th grade math**

10/3
*August 25, 2011*

**math**

what is five times ten
*June 28, 2011*

**Geometry**

How do you prove that the sum of distances to a point from the interior of an equilateral triangle is equal to the height of a triangle, therefore it is invariant and that a parrallelogram's angular bisectors from a rectangle.
*November 30, 2010*

**chemistry**

whats a compound
*November 22, 2010*

**variables**

solve for w -2(w-4)=4w+26
*November 14, 2010*

**Chemistry**

NH3(g)->N2(g)+3/2H2(G)=+45.9KJ(*1/2)and reversed CH4(g)->C(graphite)+2H2(g)=+74.9KJ reversed 1/2H2(g)+C(graphite)+1/2N2(g)-> HCN(g)=+135.1KJ Cancel out C(graphite)and 1/2N2(g) on opposite sides of the reaction. NH3(g)->H2(g)+1/2H2(g)=+45.9KJ (simplified H2(g)with a...
*October 31, 2010*

**books**

research the story of abraham and isaac in the bible and explain it as a metaphor to the soldiers' fate on pg 89 in the book GENERALS DIE IN BED BY CHARLES YALE HARRISON
*March 2, 2010*

**math riddle ALGEBRA WITH PIZZAZZ moving words**

some on help me its with the pen, thing
*April 6, 2008*

**chemistry**

I have the chemical equation: CH4 + NH3 + O2 => HCN + H2O, I have to write a balanced equation using the lowest whole number coefficients, including the state of each compound -- HELP PLEASE http://www.daigger.com/equationsbalancer.jsp All are gases, even the water (steam)
*May 8, 2007*

**Chemistry**

If one mole of the compound Al4C3 has a mass of 144g and one mole of carbon has a mass of 12g, calculate the relative atomic mass of the element aluminium. 4 Al + 3 C=144 C=12 4 Al + 3 *12=144 solve for Al So C=36 which leaves 108 divided by 4 - so 1 mole of Al = 52 ---- is ...
*May 8, 2007*

**Geology**

1b - I have to draw a cross section showing the relationship with gabbro cutting across sandstone and schist with schist being the oldest. 1c - I have to write a brief geological history of the region starting with the oldest events. 200 words. Thanks Desmond I'm saving ...
*April 29, 2007*

**Geology**

I know you can't do the work for me - but has anyone done question 1b & 1c for S103 TMA08 - As I am struggling and could really do with some idea of where to look Give us a question. We have no idea what 1b & 1c for S103 TMA08 is????? 1b - I have to draw a cross section ...
*April 28, 2007*

**Science - geology**

The age of a granite can be determined using radiometric dating. Explain the basis for a determination of a 238U-Pb radiometric date of 1120Ma for a granite.......HELP!!! hi sounds like you are on the same course as me i was stuck on this so give this a go as this is what ...
*April 25, 2007*

**Biology**

can anyone please explain the term regulating mortality factor (regarding the holly leaf miner )and how understanding of this can lead to successful biological control of pests in agriculture and horticulture hi are you doing s103 im finding this whole course very heavy going ...
*April 3, 2007*

**Chemistry**

Using a structural formula wrute out the equation for the hydrolysis of lactose - please help! see my posting on April 2, 2007 at 5:12am
*April 3, 2007*

**Chemistry**

What is the structural formulae for the hydrolysis of lactose? Lactose is a disaccharide that consists of â-D-galactose and â-D-glucose molecules bonded through a â1-4 glycosidic linkage. So if you are referring to the hydrolysis to the individual saccharides...
*April 2, 2007*

**Chemistry s103 Q5**

Sorry cannot get formula to come out right - all items move to left Now you see the problem. But that can be overcome with line drawings and a word of explanation.
*March 8, 2007*

**Chemistry s103 Q5**

struggling to get this to come out right: Compound 1 CH2=CH-CH-OH | CH3 + Compound 2 O || CH3-CH-CH2-C | OH | | ? (i) identify any functional groups in compounds 1 & 2 by circling them and naming them clearly. (ii) complete the equation for reaction 1 by drawing the ...
*March 8, 2007*

**Chemistry**

Compound 1 Compound 2 O || CH2=CH-CH-OH + CH3-CH-CH2-C | | | CH3 CH3 OH | | ? (i) identify any functional groups in compounds 1 & 2 by circling them and naming them clearly. (ii) complete the equation for reaction 1 by drawing the abbreviated structural formula(e) of the ...
*March 8, 2007*

**CHEMISTRY**

SORRY ADD ON TO MY PREVIOUS QUESTION. I ALSO NEED TO WORK OUT THE PH OF THE SULFURIC ACID SOLUTION. http://www.jiskha.com/search/search.cgi?query=21g
*March 8, 2007*

**CHEMISTRY**

A 21g SAMPLE OF SULFURIC ACID IS DISSOLVED COMPLETELY IN SUFFICIENT WATER TO MAKE A .025 LITRE OF FINAL SOLUTION. CALCULATE THE HYDROGEN ION CONCENTRATION (IN mol1-1)IN THIS SOLUTION. GIVE YOUR ANSWER IN SCIENTIFIC NOTATION TO AN APPROPRIATE NUMBER OF SIG. FIGS. SHOW THE ...
*March 8, 2007*

**chemistry**

NaCN - DEDUCE TYPE OF BONDING THAT HOLDS THIS COMPOUND TOGETHER, EXPLAIN IN 1 OR 2 SENTENCES. There is a covalent bond between the C and N atoms in the CN- ion, and an electrostatic bond between the Na+ and CN- thank you very much
*March 8, 2007*

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