Thursday
April 24, 2014

Posts by chloe


Total # Posts: 338

science
preparation of copper sulphate crystals excess copper oxide is needed above a)how do you know the solid is in excess? b)how do you remove the excess? c)what colour is the solution? d)give the next to steps to make crystals?

MATHS
the 50p is a 50p piece it says in the book it is less than 50p (money)

MATHS
please help

MATHS
matt and ruba each have one coin. The total amount of money is less than 50p. work out the probability that exactly one of the coins is a 10p piece. assume that all possible coins are equally likely.

maths
please help as soon as possible

maths
matt and ruba each have one coin. The total amount of money is less than 50p. work out the probability that exactly one of the coins is a 10p piece. assume that all possible coins are equally likely. please can you explain i have to know how to do this

CHEMISTRY
Thank you

CHEMISTRY
thank you so is AL2O3 3 elements Ca(HCO3)2 4 elements

CHEMISTRY
please help

CHEMISTRY
how many elements in (NH4)2SO4

chemistry ASAP
name the following: H2SeO3 H2TeO2 PO3^3- HCLO4 Please explain how to find the names !!!!!

Physics
The conducting rod ab shown below makes frictionless contact with metal rails ca and db. The apparatus is in a uniform magnetic field of 0.855 T, perpendicular to the plane of the figure. The length L of the rod is 25 cm. (a) Find the magnitude of the emf induced in the rod wh...

math
what is the total price of a sweatshirt that is priced at $48 and taxed at 6.5%?

6th
what is the sum of 3142,6328, and 4743 to the nearest thousand?

maths
a car travels at a speed of 35mph how long would it take a car to travel 7miles

physcis!
A car accelerates from rest at 4.9 m/s2. How much time does it need to attain a speed of 6 m/s?

physics! please help!
A car accelerates from rest at 4.9 m/s2. How much time does it need to attain a speed of 6 m/s?

Physics
Two ants race across a table 65 cm long. One travels at 5.76 cm/s and the other at 3.99999 cm/s. When the first one crosses the finish line, how far behind is the second one?

Calculus
The graph A(x) has points (-3,0), (0,-2), (1,0) and (2,3). If C(x) is defined by C(x)=A(2x+3), then what is the domain and range of C and how would the graph of C(x) look like? Also, is there any way to find what the actual equation of A(x) is with the points listed above? Tha...

Physics
An object, that is 3.25 mm high is placed 16 cm in front of a lens. The image produced by this lens appears 6.0 cm behind the object, as the figure shows. (a) What is the focal length of this lens and what type of lens is it? (b) What is the height of the image? Is it real or ...

Physics
An object 0.600 cm tall is placed 16.5 cm to the left of the vertex of a concave mirror having a radius of curvature of 22.0 cm. (a) Draw a principle-ray diagram showing the formation of the image. (b) Calculate the position, size, orientation (erect or inverted), and nature (...

Physics
A speedboat, starting from rest, moves along a straight line away from the dock. The boat has a constant acceleration of +3.00 m/s2. A siren on the dock is producing a 755 Hz tone. Assuming that the air temperature is 20.0oC, what is the frequency of the sound heard by a pers...

sciencs
what is denser, 1 grams of gold or 1 kilograms of copper? why?

physics
additional information:the distance between wire 1 and wire is 25 cm and the distance between the wire 2 and point A is 12 cm.

physics
Consider two current carrying wires shown below. The current in the wire 1 is 4.5 A in the positive x direction. Find the magnitude and direction of the current in wire 2 if the net magnetic field at point A is to be 7.5 μT in the positive z direction (coming out of the p...

Physics
The conducting rod ab shown below makes frictionless contact with metal rails ca and db. The apparatus is in a uniform magnetic field of 0.855 T, perpendicular to the plane of the figure. The length L of the rod is 25 cm. (a) Find the magnitude of the emf induced in the rod wh...

Physics
The conducting rod ab shown below makes frictionless contact with metal rails ca and db. The apparatus is in a uniform magnetic field of 0.855 T, perpendicular to the plane of the figure. The length L of the rod is 25 cm. (a) Find the magnitude of the emf induced in the rod w...

Physics
But that only gives me the force. I need the charge to help me find electric field

Physics
A proton is released from rest in a uniform electric field. After the proton has traveled a distance of 10.0 cm, its speed is 1.4 x 106 m/s in the positive x direction. Find the magnitude and direction of the electric field.

physics
Find the magnitude and direction of the net electrostatic force exerted on the point charge q3 in the figure below, where q = +2.5 μC and d = 28 cm. The picture is of a square. q1=+q, q2=-2q, q3=-3q, q4=-4

physics
Find the magnitude and direction of the net electrostatic force exerted on the point charge q3 in the figure below, where q = +2.5 μC and d = 28 cm. The picture is of a square. q1=+q, q2=-2q, q3=-3q, q4=-4

Physics
Ok that makes much more sense. Thank you for your help!

Physics
I dont understand what you're trying to say when you're saying to add. Can you elaborate more?

Physics
I dont understand what you're trying to say when you're saying to add. Can you elaborate more?

Physics
A charge q =+ 4.11 x 10 - 9 C is placed at the origin, and a second charge equal to -2q is placed on the x axis at the location x = +1.00 m. (a) Find the electric potential midway between the two charges. (b) The electric potential vanishes at some point between the charges. F...

english / laungage
3. In “The Celebrated Jumping Frog of Calaveras County,” Jim Smiley’s horse wins races by A) attacking all the other horses in the race. B) raising a lot of dust so the other horses can’t see where to go. C) barreling past the other horses, after having a h...

microbiology
What dilutions would have to me made (from a starting concentration of 5 x 10^8 cells per ml) to achieve a final concentration of 1 x 10^3 cells per ml?

math
A crime wave

math
A crime wave

math
A crime wave

english
how do you start a good beggining of a story plz help

math
how do you do translations

College Algebra
Angela cam comlete a project in 2 hours. it takes Jason 3 hours to complete the same project. how long will it take for them to complete the project together?

science
thankyou jai

science
julie carried out a chemical reaction using magnesium and an acid the products of the reaction were magnesium chloride and hydrogen. julie collected a test tube of the hydrogen. describe what she should do to show that it was hydrogen.

science
julie carried out a chemical reaction using magnesium and an acid the products of the reaction were magnesium chloride and hydrogen. julie collected a test tube of the hydrogen. describe what she should do to show that it was hydrogen.

science
sorry theres something wrong with what has just happened

science
julie carried out a chemical reaction using magnesium and an acid the products of the reaction were magnesium chloride and hydrogen. julie collected a test tube of the hydrogen. describe what she should do to show that it was hydrogen.

General
An advertisement has the best chance for success if it: is accompanied by loud music and rapid banter. is above threshold. contains a single subliminal message. contains a grouping of words repeated below threshold.

Psychology
Which one of the following statements about the gate-control theory is true? Pain impulses create a gate leading to the brain. The brain is capable of generating pain on its own. The gate closes when pain messages go to the brain. Damage to small nerve fibers lets pain through...

Psychology
The "face module," located in the right temporal lobe of the brain, explains why: the cells fire when a dog lover looks at pictures of show dogs. infants are not afraid to go to strangers. ganglion cells in this area respond to simple features. we need only the right...

Chemistry
EEG, PET, and TMS are all: (Points: 5) laboratory observations that introduce experimenter bias into the study. descriptive methods for studying the brain. standardized methods for studying the brain. experimentally controlled technologies for brain-wave analysis. I think it ...

Science
The brain can be studied by using: (Points: 5) electrical, biochemical, and magnetic means. radio frequencies, computers, and neurotransmission. neurotransmitting, electrical, and biochemical means. biochemical, neurotransmitting, and magnetic means. i think it is C but not sure

general
A tragedy hits a small town. The elementary school explodes into flames trapping several classes of second graders. Because the volunteer fire department will take too long to get there, teachers and classified staff remove all the children to safety without considering the d...

science
rosie tried to use a maganet to stick a memo on to her mirror it would'nt stick. explain why!

Psychology
Which one of the following statements about intelligence is the most accurate? IQ is a valid measurement, and environmental factors do not change mental ability. Intelligence is mostly genetic, has the most variability between groups, and is reliable regardless of the environm...

maths
can you show me how to do it

maths
please help me

maths
shane wants to paint the outside of his house, the area to be painted is 217m2. five litres of paint will cover an area of 62m2. how many litres of paint will shane need to paint the outside of his house!

maths
thanks

maths
899

maths
895

maths
1899

maths
sorry and the following week the number of visitors were 900 to the nearest 100 what is the largest number of visitors that could have visited the leisure centre that week

maths
thanks very much

maths
a leisure centre recordsthe number of visitors each week in one particular week there were 1372 visitoros the following week the number of visitors was 900 to the nearest hundred! what is the smallest number of visitors that could have visited the leisure centre that week?

Intro to psychlogy
that is the wrong answer i think i need some help

Intro to psychlogy
Thank you i am thinking the answer is A

Intro to psychlogy
Which one of the following statements about intelligence is the most accurate? IQ is a valid measurement, and environmental factors do not change mental ability. Intelligence is mostly genetic, has the most variability between groups, and is reliable regardless of the environ...

Intro to Psychology
B is the correct answer

Intro to Psychology
ok is it C! This is a tricky question...

Intro to Psychology
Genetics and what we inherit from our biological parents play a significant role in our intelligence level. In fact, researchers have found that: adopted children are more similar in IQ to their adoptive parents than to their birth parents. identical twins raised apart are mor...

Intro to Psychlogy
One of the best ways to compute heritability is to compare: adopted children compared to adopted siblings. blood relatives who live in the same area. fraternal twins reared in different environments. identical twins reared in different environments. please help i think it is D

Psychology
The sentences, "Lee gave the ball to Lynne" and "Lynne received the ball from Lee," have the same: surface structure. syntax. surface and deep structures. deep structure. I am going for C Not Sure

Psychology
Random assignment can be described as a research method: used to balance the independent and dependent variables. no longer used because of its unpredictability. increasing the likelihood that the experimental group and control group will be different. used to balance the con...

Psychology
An experimenter is studying how time spent on a cell phone affects people's ability to drive safely. Driving the car is the: dependent variable. coefficient of correlation. independent variable. operational condition. I think the answer is A but i am not sure

maths
sorry how many minutes will it take 8 monkeys

maths
if it takes 1 monkey to eat a banana in 1 minute how long will it take 8 monkeys to eat 8 bananas

english
thank you so much i apperciate that

english
thanks how are animals treated nicely

english
please help

english
can you tell me your views on how people treat animals for example keeping animals as pets please help im stuck

French HELP
write instead of 15 write quanze all spelling is fine

science
sulphuric acid + sliver = hydrochloric acid + calcium = not sure on how to do these

maths
doesnt matter

maths
what i don't get you how do you get 45 percent

maths
how do you get 45 percent of something urgent thankyou

maths
its ok i got the answer

maths
what sides do i double

maths
i don't fully understand

maths
is it

maths
is it 0 or 2

maths
but im not sure can you show me you don't need to tell me the answer

maths
sorry can i ask you one more question related to that one if y=-3 what is the value of x

maths
thankyou so much i find them very hard

maths
please

maths
this is urgent y=1/2x - 1 if x equals 4 what does why equal? please help

english
please help if you dont know its fine!

english
can you please tell me a bit about mamma mia the musical /movie?

maths
how do you draw translations of rotation of 90 degrees im not sure?

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