Total # Posts: 96
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 ...
October 27, 2016
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?
October 3, 2016
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.
October 20, 2015
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
April 26, 2015
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...
April 14, 2015
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 ?
February 25, 2015
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
June 13, 2014
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 ...
June 11, 2014
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
June 11, 2014
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
May 24, 2014
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
April 16, 2014
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) ...
April 2, 2014
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:
March 8, 2014
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
January 31, 2013
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 ?
October 7, 2012
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.
September 12, 2012
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 ...
May 15, 2012
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
May 3, 2012
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)
April 25, 2012
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?
April 21, 2012
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
March 28, 2012
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
March 19, 2012
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
March 19, 2012
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 ...
March 18, 2012
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
March 5, 2012
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 Thorpes volume
September 1, 2011
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:
November 3, 2010
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-...
May 26, 2008
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...
October 18, 2006
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 ...
September 17, 2006