# Posts by Ayesha

Total # Posts: 98

Math
-2hxh/-4h²

geography
if you would find me the asnwer, send me too :p

chemistry
A student determines the heat of dissolution of solid potassium perchlorate using a coffee-cup calorimeter of negligible heat capacity. When 2.13 g of KClO4(s) is dissolved in 106.00 g of water, the temperature of the solution drops from 25.00 to 23.17 °C. Based on the ...

Math
They have emptied 1/2 to an oil tank; then they emptied another half of what was left; then the rest of 11/15 emptied. Now, there are 26 liters in the tank. How many liters were at first?

PACE INter Science Colldege
what is average rate in cm3/s of gasoline to the engine of a car travelling at 100km/hr if it averages 10km/l?

science
kutiii

math
begnning with temperature of 2 degree,the temperature rises by 8 degree,then drops by 14 degree and finally rises by 2 degree.what is the temperature after the above changes?

physics
the speed of light is measured to be 1.50*10^8 m/s in a sucrose water solution. calculate the refractive index of the solution. \

science
why echo is weaker than original sound

life orientation
Propose 6 practical actions that you can take to address human rights violations of xenophobia in your community

science
A fairy tale about chloroplasts invasion and got into animals

rbm
A meter stick dropped a shadow of length 70 cm in the sun .at the same time ,a tree dropped a shadow 5.6m long .what is the height of the shadow

maths
a water tank is filled by two pipes in 48 minutes. if the larger pipe fill it alone in 40 minutes less time the smaller pipe. find the time it takes for the smaller pipe to fill the tank alone.

Math
If we decide 3150 with 18,25 and 35 so our question will be solved. 👍

AP Physics
Two adjacent natural frequencies of an organ pipe are found to be 900 Hz and 990 Hz. (a) Calculate the fundamental frequency and length of this pipe. other info that I already calculated: -the pipe is open at both ends - length of pipe is 1.89m

math
A5-digit number has 7 in its place The digit in once place is 5 less than its digits at tens place The hundreds place digit is 4 times the digit at once place The digit at thousands place is the same as at hundreds place sum of all the digits is 33 write the number in standard...

chemistry
I got a weird answer. C1.9H4O. Do u think this is right?

chemistry
Upon combustion, 4.30 grams sample of a compound containing only carbon, hydrogen, and oxygen produced 8.59 g of CO2 and 3.52g of H2o. what is empirical formula of the compound ?

CHEMISTRY
how to predict that given complex is sp3 dsp2 hybridized because in Mcqs they ask to identify hybridization in given compound

physics
WHICH HAS PRINCIPAL QUANTUM NUMBER OF 3 AND ANGULAR MOMENTUM QUANTUM NUMBER OF 2 A 3s b 3d c 4f d 3f

physics
charge on 500mg of electron

CHEMISTRY
how to predict that given complex is sp3 dsp2 hybridized because in Mcqs they ask to identify hybridization in given compound

CHEMISTRY
how to predict that given complex is sp3 dsp2 hybridized

PHYSICS
T.E of e in excited state is E . WHAT IS KINETIC ENERGY with proper sign

CHEMISTRY
Is ostwald's viscometer use for measure coefficient of viscosity?

biology
does dark reaction helps in transmittance and conservation of energy

PHYSICS
'if diametre of earth is reduced to half mass remains constant what is then duration of day and night'

PHYSICS
racing car accelerates uniformly. changes with following average speeds 20m/s for 2sec ;40m/sec for 2s and 60m/s for 6sec . what is overall average speed of car

PHYSICS
IF EARTH WERE TO ROTATE FASTER THAN ITS PRESENT SPEED THEN WEIGHT PF OBJECT WILL DECREASE AT EQUATOR BUT REMAIN UNCHANGED AT POLES why?

PHYSICS
if force acts on body WHOSE ACTION LINE does not Passes through its center of gravity then body will experience A ANGULAR ACCELERATION b linear acceleration C ZERO ACCELERATION D ZERO ACCELERATION

CHEMISTRY
WHEN CAP OF SOFT DRINK IS REMOVED THEN ITS MASS FIRST INCREASES AND THEN DECREASES WHY?

PHYSICS
ANGULAR VELOCITY OF SECOND HAND OF WATCH IS a 2pi /30sec B pi/30sec C pi/60sec D PI/1800

PHYSICS
monkey is accelerating down string whose breaking strength is two third of its weight the min acceleration of monkey should be A 1/3g B 2/3g C G d ZERO

CHEMISTRY
WHEN CAP OF SOFT DRINK IS REMOVED THEN ITS MASS FIRST INCREASES AND THEN DECREASES

PHYSICS
for given angle of projection if time of flight is doubled horizontal range will increase to A FOUR TIMES B thrice C once D TWICE

PHYSICS
ratio of average velocity and average and average speed

Physics
H=Vi^2/2g solve this and u will get answer

PHYSICS
ball is dropped from certain height another ball is projected horizontally from the same point . Which statement is correct A BOTH HIT GROUND AT SAME VELOCITY B BOTH HIT GROUND AT SAME SPEED C change of velocity during path for both balls is same D change of SPEED during path ...

PHYSICS
ball is dropped downwards. After 1 sec another ball is dropped from the same point . What is distance between them after 3sec A 25m B 20m C 50m D 9.8m

physics
if a train at 72kmphr is to be brought to rest in a distance of 200 m then its retardation is A 20m/s^2 b 10m/s^2 c 2m/s^2 d 1m/s^2

physics
a car travels first half distance between two places with average speed of 30 km per hour and remaining half with a speed of 50 km per hour what is the average speed of the car is A 37.5KM/hr B 10km/hr //c// 42km/hr D 40km/hr

PHYSICS
relation between time "t" and distance "x' is t=ax^2+bx where a and b are constant then acceleration is A / -2abv^2 b/ 2bv^3 C // -2av^3 D // 2av^2

social studies
what is a minority group? what does it mean?

PHYSICS
there is no option of 11N . i have tried to sole it dozen of times but i am unable to figure out the right option which is 8N. Can anyone tell me how i can solve it in right manner to get correct option

PHYSICS
two forces of magnitude 8N making an angle of 30 and 120 with xaxis . the y component of resultant A/ O B/ 4N C/ 8N D/ 16N

CHEMISTRY
WHICH IS LIMITING REAGENT IN FOLLOEING REACTION 3Mg +N2 =Mg3N2

CHEMISTRY
.4g sample of monobasic acid requires 16cm3 of .1 mol dm 3 of NAOH for complete neutralization what is relative mass of acid

SCIENCE
2o L of N AND 100l OF h REACTED TO PRODUCE NH3 WHAT IS DECREASE IN VOLUME OF MIXTURE

science
what happen if blood entering the heart mixed with blood leaving the heart?

physics
An object floats on water with 84% of its volume below the surface. The same object when placed in another liquid floats on that liquid with 74% of its volume below the surface. Determine the density of the unknown fluid

English
Did I do this correctly?? Select the correctly written sentence in this group. A. Spending way too much money on his old car, Fred's salary just wasn't enough. B. Spending way too much money on his old car, Fred soon found he'd used up his salary. (my answer) ...

PHYSICS
the sum of the magnitude of two forces acting at a point is 18 and the magnitude of their resultant is 12.if the resultant is at 90 degree with the force of the smaller magnitude, then their magnitudes are:

1.the committee consister of a businessman, a banker& lady lawer. 2.three people applied for the job, including two well-educated black woman.

english
Erosion will occur

Math
222+999

maths
a wheel revolves 360 degree revolution in one minute.Find how many radians will the wheel subtend in one second

science
a particle takes 6.28seconds to complete one revolution.its angular speed is

Physics

Gr 12 Chem
Given: N2 + 3H2 = 2NH3 + 92.5 KJ, what is the delta h of f for NH3?

physics
a)Aluminum: the electrons in the sphere would rise towards the positively charged glass rod making the top part of the sphere negative and the bottom part positive b) Non conducting matierial: nothing would happen the sphere would still be neutral

biology
why would you like to watch wildlife on television or visit the zoo?

Chemistry
Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What percent (by moles) of is present in a helium-oxygen mixture having a density of 0.498 at 25 and 721 ?

English
An essay,describe and explain some of the ways in which you have changed.Since you started your present school and some of the ways in which your personality remains the same.

math
price of 5 litres of cooking oil is rs. 302.50. find the price of 1 litre cooking oil

dressmaking
Which of the statements about a knotted fringe is true A)the no of threads in a fringe is determined af the fringe is fastened to the garment B)the looped threads of a fringe aren't cut til after the threads are fastened to the garment C)the fringe is fastened to the edge ...

Dressmaking
A suit with rounded lapels and shawl collar would work best on a woman with which type of bodyline A)straight B)soft-straight C)curved D)sharp straight I think that the correct answer is B.Need help

dressmaking
It doesnt mention the checks.Just talks about a houndstooth jacket

dressmaking
A houndstooth jacket would work well with which bodyline A)staight B)curved C)soft-straight D)soft-curved I think the answer would be either B or D

dressmaking
are yu saying the answer is D.Im thinking it shd be B as nylon frays easily

dressmaking
What fabric is not suitable for a french seam? A)cotton B)nylon C)lawn D)broadcloth Not sure if it is B or D

dressmaking
Two seams recommended for use when making underwear and baby clothes are a)french and run and fell b)open and french c)standing fell and overlaid d)whipped and flat fell I think the answer is a)

chemistry
an oxygen tank contains 12.0 L at 25 degree C and 3 atms. After a 4 L canister of oxygen at 25 degree C and 3 atms is emptied into the storage tank, what will happen to the temperature and pressure of the tank to be?

Dressmaking
I did answer your question.that was the way the question was worded.

Dressmaking
The outer edges of a stand collar are a) larger b) 1/8inch smaller c)cut on the bias d) the same this is the way the question is worded and I think they refer to the neckline of the garment to which it is attached.I think the answer is either b or d

Dressmaking
larger,smaller or the same as the neckline of the dress I think

Dressmaking
forget to mention that i think the answer is D

Dressmaking
The outer edges of a stand collar are A)larger B) 1/8 in.smaller C)cut on the bias D)the same

sewing
I think the answer is b)

sewing
Which type of fasteners becomes more secure when yu try to pull the garment pieces apart a)snap fasteners b)hook fasteners c)velcro d)zipper

dressmaking
I feel the answer is 1)because the waist needs to be strong as it fits the body closely and has to support the weight of the skirt or trousers and need interfacing to support it

dressmaking
the top of pants or skirt is finished with facing when a)extra strength is required at the waistline 2)its not possible to layer the fabric 3)a stay tape cant be used at the seams or 4)you don't want the waistband to be visible from the right side

triganometry
A landscape architect is designing a triangular garden to fit in the corner of a lot. The corner of the lot forms an angle of 50°, and the sides of the garden including this angle are to be 12 feet and 14 feet, respectively. Find, to the nearest integer, the number of ...

Dressmaking
as many alterations as possible should be made A)after sewing a garment B)on the pattern pieces C)immediately after cutting D)following the markings on the pattern pieces Im not sure if B or D is correct

maths
A circular pool has a diameter of 3m and is filled to a depth of 70 cm. Mr Thorpe climbs into the pool and submerges for ten seconds while his son measures the new depth at 72 cm. Calculate Mr Thorpe’s volume

Iron and Sulphur reaction
Fe + S = FeS Iron + Sulphur= Iron Sulphide

PHYSICAL SCIENCE
What force is necessary for a person to hold a 50 kg mass over their head? ANSWER: WEIGHT

Marketing 421
Hewlett-Packard sells personal computers through specialty computer stores, electronics superstores, and its own Internet site. The marketing mix variable that is being considered here is:

sociology
identify two things that were considerd deviant in the past but are not considerd deviant now

Physics 30
Is this particle an electron, proton, alpha particle or non of the above.

physics
nine

maths

maths
SHARES AND DIVIDENDS 1-introduction- 2-explain the terms -; Nominal value/face value, market value, rate of dividend, annual dividend, rate of income, rate of return, percentage yield, Demat, bullish, bearish. 3- Fill up an application form for shares with fictitious data. 4-...

Chem
no because it is the ratio of no of moles of solute and mass of solvent in kg so mass remain constant at any termperature and molality will not change with termperature.

physics
gravity on the surface of the moon is only 1/6 as strong as the gravity on earth. What is the weight of a 39kg on the earth?

Humanity
i don't know and wat is the question dum i know the question butt wat answer stupid lol lol hahahhahahahahha

social studies
Ways to protect the monument Which monument? Not only do we need to know which monument, but it would be helpful if we know what you want to protect it from. Are you talking about weather damage, vandalism or some other source of damage? I hope this helps a little more. Thanks...

social studies
What is the neen to preserve and protect the monuments Which monuments? Are they old, beautiful, new, poorly made? what are the magial rivers in the regin?

Music
The 12 Bar Blues is a chord sequence based on chords I, IV, and V. Complete this chord pattern below: I I ? ? IV ? I I V ? ? ? Here is the form in Blues... T T T T S S T T D S T T Where the T, S, and D refer to Tonic, Subdominate, and Dominate. Thank you so much!!!!! You are ...

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