BOliroc

15ml of solution X (1000mg/L) is diluted to 250ml

What is the concentration of the diluted X solution in mg/L

Please show the methods on how you would do this

I have a brother who was so into them when he was a kid and now he doesnt want them anymore. Whats the place for the best offers for action figures??

These are quite old, at least 10 years+

Thanks!

Q) A statistical test showed that the difference between the two frequencies of the t allele was significant at the P = 0.05 level.

Use the terms probability and chance to help explain what this means.

I dont understand how to go through this, first off I dont understand what the P value means,

Is it something to do with the probability of the null hypothesis??

What if the P value is below or above the P value??

Thanks!

Quick question

say for example im calculating the enthalpy change of a solution which contains two liquids, e.g. HCl and NaOH.

would the mass be the total mass of the liquid?

''Given that the tension in the rope attached to the pole at C is eight times the tension in the rope attached to the pole at A''

does it mean that the tension in C is 8 times greater than A

or

Tension in A is 8 times greater than C???

ABCD is a trapezium with AV parallel to DC and DC = 3AB.

M is the mid-point of DC, AB (->) = a, BC (->) = b

Find in terms of a and b:

a) AM (->)

b) BD ( ->)

c) MB (->)

d) DA (->)

I dont understand how to do this. ( I just dont seem to understand how DC=3AB, is this a magnitude??)

Please help!!! 10 points for best answer!

Albert and Bella are both standing in a lift.

The mass of the lift is 250kg. As the lift moves upwards with constant acceleration, the floor of the lift exerts forces of magnitude 678N and 452N respectively on Albert and Bella. The tension in the cable which is pulling the lift upwards is 3955N.

a) Find the acceleration of the lift

b) Find the mass of Albert

c) Find the mass of Bella

I dont know how to do this, please explain!

Thanks!

(Im someone who hardly does any physics, but stuck in a situation where I have to learn a bit of voltage for chemistry)

I've been looking around and gathered information about some terms to define voltage.

Voltage is the difference in energy that a units worth of electrons in one area has compared to another area.... or it is the pressure that pushed electrons.

so heres the question

Is this true?

The higher the voltage:

The greater the difference in energy, or amount of electrons.

The greater the pressure, or the rate at which electrons are transported to another location?

I have A and B with ratios of 12.25 : 12.50 respectively

I wanna simplify this, but which way do I divide?

is it gonna be 1 : 1.02

or 0.98 : 1

do you divide by the bigger number?? always?

A ball of mass 0.2kg is dropped from a height of 2.5m above horizontal ground.

After hitting the ground it rises to a height of 1.8m above the ground.

Find the magnitude of the impulse received by the ball from the ground?

Help. Please.

'what are other methods of administering insulin'

what does this mean??

say for example blue eyes.

will BB people have bluer eyes than Bb? <- thats what i mean by 'show more'

Please give examples! Thanks :)

If i put on the calculator sin90, what does the given number mean??

I am still unsure about the meaning 'trigonometric ratio'

Still learning the basics of Trig

Please explain! Thanks

I cant find anything specific on the net,

help!

Im pretty sure its okay to use 1/2 x a x b x Sin(C) to work out the area of an isosceles triangle. just to clarify is it okay to use that equation?

and also when working out the area, and the angles are in radians does that change anything?

What is Biodiversity?

Difference between Environment and community?

What is an Ecosystem?

What is Species diversity?

What is Genetic diversity?

Questions are just to clarify things.

Thanks! :)

I understand that there is two forces acting on the blood vessels.

Hydrostatic pressure and Osmotic pressure. At the near end of the capillary, the hydrostatic forces are greater in one end than the other?

So how can the tissue fluid be returned at the end where there is high blood pressure?

Does CO2, the waste product diffuse into the capillary or does it get carried in tissue fluid?

Does Oxygen get carried in tissue fluid or just naturally diffuse into tissues from the capillary?

What is the function of the Lymph?, or a similar question

What exactly is the lymphatic system?

Please explain things as simply as possible :), for i am stupid.

Say a line has gradient 2/3

Then another line that is perpendicular and intersects has gradient [ 10 - 4 / 9 - a ]

(why multiply the 2 equations together and make the equation equal to -1 )??

All i want to know is, what happens when you multiply two gradients together and set it equal to -1?

[I cant really show the question :/, dont know how to]

Thanks!

Cant find the answer to this simple question...

What happens when :

Square root(9x^2 + 3y^2 + 2)

do both the powers get eliminated? or do only 1 get eliminated?

-confused-~~