YASH
Popular questions and responses by YASH
thermodynamics
Consider two closed systems A and B. System A contains 3000 kJ of thermal energy at 20°C, whereas system B contains 200 kJ of thermal energy at 50°C. Now the systems are brought into contact with each other. Determine the direction of any heat transfer
asked on August 8, 2011 
KENDRIYA VIDYALAYA, PHYSICS
A PROJECTILE HAS SAME RANGE 'R' WHEN MAXIMUM HEIGHT ATTAINED BY IT IS EITHER 'H1' OR 'H2'.FIND THE RELATION BETWEEN,'R','H1','H2'.
asked on August 8, 2011 
math
the cost of carpeting a room 12 m wide with a carpet of width 85 cm at the rate Rs 120 is Rs 28800. find the length of the room.
asked on April 3, 2018 
Math
A ribbon is 3metres long.I need 8pieces of ribbon each 40cm long.How many centimetres shorter is the ribbon than the length I need?
asked on November 26, 2017 
science
an object of size 3cm is placed at a distance of 15cm from a convex lens of focal length 10cm calculate the distance and size of image so formed what will be nature of image?
asked on December 6, 2016 
Choudhary
An open knife edge of mass 200g is dropped from hieght 5m on a cardboard. If the knife edge penetrates 2m into the cardboard, the average resistance offered by the cardboard to the knife
asked on September 21, 2011 
SCIENCE(chemistry)
draw a temperature time plot for icesteam transformation
asked on May 22, 2011 
SCIENCE(PHYSICS)
A train travels 40 km/hr for 0.2 hr, 50km/hr for next 0.2hr and 60km/hr for next 0.4 hr.calculate the average speed of train
asked on May 22, 2011 
science
I need help to prepare survey report on "use of mobiles are the need of an hour". Report should contain questions asked during survey, graphical representations etc.
asked on June 15, 2012 
science
I need help to prepare survey report on "use of mobiles are the need of an hour". Report should contain questions asked during survey, graphical representations etc.
asked on June 15, 2012 
Math
While going downstream boat covers a distance in 48km in 6hrs while returning covering the same distance in a task. find the speed of boat and that of river.
asked on April 10, 2018 
Math
A ribbon is 3metres long.Can we cut it into 5ocm pieces and have nothing left over?Write the reason why or why not.
asked on November 26, 2017 
Maths
By picking a natural number randomly upto 100, find the probability of the number being a perfect cube
asked on March 21, 2017 
Science
An aeroplane takes off from runway making an angle of 30 horizontally at a speed 500ms find the height attained by the aeroplane after 15s?
asked on July 8, 2016 
Discrete math
Consider the following theorem (p > q): If the quadrilateral ABCD is a square, then its diagonals are perpendicular and have the same length. State the converse (q>p), inverse (~p > ~q), and contrapositive (~q > ~p). ">" is an arrow
asked on March 3, 2016 
physics
A pistol of mass 2kg fires a bullet of mass 50g. The bullet strikes a block of mass 0.5kg. If the block with bullet embedded in it moves with a velocity of 4m/s the recoil velocity of the gun will be..??
asked on August 28, 2015 
Physics
Two spheres A and B of equal mass are free to move on a smooth horizontal surface. A and B move towards each other with velocity vectors ai+bj and ci+dj r respectively and collide when the line joining their centres is parallel to i. After impact A and B
asked on April 8, 2015 
math
i am number between 35 and 45 i am completely divisible by 13 find the number
asked on April 3, 2015 
buisness
I want a project on 'case study on soft drinks' of about 30 pages which should include information abou history,nature of soft drinks, process of manufacturing and a casestudy on a particular softdrink brand
asked on December 15, 2013 
science
2 liters of water at 80.c is found into a plastic bucket containing 10 liters of water at 20.c what is the final temperature of water ( density of water 1kg/litre) (neglect the heat gained by bucket and specific heat capacity of water = 1cal/gm.c ?
asked on August 24, 2012 
english
from where i will get an essay on the topic "the complete development of students is only possible by strict discipline " write for or against the topic
asked on June 26, 2011 
english
where will i get the essay in about 500 words on "polluting the environment is dangerous for human existence",prove using present instances
asked on June 26, 2011 
english
i am not able to find a a poem on any inanimated thing like snow, chalk candle etc. in about 81o lines on net. poem should be of class 9th level can u help me please... regards yash sethia
asked on June 20, 2011 
english
a poem on any inanimated thing like snow, chalk candle etc. in about 81o lines poem should be of class 9th level
asked on June 18, 2011 
maths
a trapezium with its parallel sides in the ratio16:5,is cut from a rectangle whose sides measure 63m &5m respectively. the area of the trapezium is 4/15 of the rectangle .find the lengths of the parallel sides of the trapezium.
asked on June 3, 2011 
maths
the cross section of a canal is a trapezium in shape .if the canal is 10m wide at top ,6m wide at bottom & the area of the cross section is 72 sq m ,determine its depth
asked on June 2, 2011 
maths
a trapezium with its parallel sides in the ratio16:5,is cut from a rectangle whose sides measure 63m &5m respectively. the area of the trapezium is 4/15 of the rectangle .find the lengths of the parallel sides of the trapezium.
asked on June 2, 2011 
SCIENCE(PHYSICS)
a train is moving on a straight track n travels at a speed of72km/hr and passes a pole in 3 seconds. find the time taken by the train to pass the bridge of length of 540 m? Sir in the solution i understood why we will get27 sec. but why we will add 3 sec?
asked on May 27, 2011 
SCIENCE(PHYSICS)
a train is moving on a straight track n travels at a speed of72km/hr and passes a pole in 3 seconds. find the time taken by the train to pass the bridge of length of 540 m?
asked on May 27, 2011 
SCIENCE(chemistry)
SIR BUT THIS IS ONLY PROVIDED IN THE QUESTION &I HAVE TO COMPLETE IT. (DRAW A TEMPERATURE TIME PLOT FOR ICE STEAM TRANSFORMATION.)
asked on May 25, 2011 
SCIENCE(PHYSICS)
A train travels 40 km/hr for 0.2 hr, 50km/hr for next 0.2hr and 60km/hr for next 0.4 hr.calculate the average speed of train. My Solution:1st hr. distance=40 multiplied by 0.2=8km 2nd hr.= 50 multiplied by 0.2=10km 3rd hr. =60 multiplied by 0.4=24 km
asked on May 25, 2011 
SCIENCE(chemistry)
DRAW A TEMPERATURE TIME PLOT FOR ICE STEAM TRANSFORMATION. PLEASE DRAW THE PLOT AS I WAS NOT ABLE TO DRAW IT.
asked on May 23, 2011 
SCIENCE(PHYSICS)
A TRAIN IS MOVING ON A STRAIGHT TRCK AND TRAVELS AT A SPEED OF 72KM/HR AND PASSES A POLE IN 3 SECONDS. FIND THE TIME TAKEN TO PASS A BRIDGE OF LENGTH 540m. PLEASE SOLVE THE QUESTION AND ANSWER IT AS I WAS NOT ABLE TO ANSWER IT.
asked on May 23, 2011 
SCIENCE(PHYSICS)
A train travels 40 km/hr for 0.2 hr, 50km/hr for next 0.2hr and 60km/hr for next 0.4 hr.calculate the average speed of train. PLEASE SOLVE THE QUESTION WITH ANSWER AS I WAS NOT ABLE TO GET THE ANSWER
asked on May 23, 2011 
SCIENCE(biology)
define sustainable agriculture
asked on May 22, 2011 
SCIENCE(PHYSICS)
A TRAIN IS MOVING ON A STRAIGHT TRCK AND TRAVELS AT A SPEED OF 72KM/HR AND PASSES A POLE BIN 3 SECONDS. FIND THE TJME TAKEN TO PASS A BRIDGE OF LENGTH 540m
asked on May 22, 2011 
economics
Suppose a monopolist faces production function Q = 3KL and demand function Q = 12 − P. Derive the input demand (as a function of Q, r and w) for capital and labor.
asked on March 31, 2011 
geometry
Prove that all altitudes of a rhombus are conqruent
asked on March 4, 2011 
physics
activity to demonstrate the fact that for a metallic wire of uniform material density and thickness, the resistance increases directly with its length.
asked on January 30, 2011 
chemistry
identification between copper sulphate & zinc sulphate
asked on June 8, 2010 
History
rampurva bull capital
asked on May 23, 2006

Physics  Mirrors & Lenses
Plese solve answre
posted on May 1, 2020 
Math
Three angles of a quadrilateral are in the ratio 2:3:7.The mean of these angels is 64 degrees. Find all the four angles?
posted on October 5, 2019 
math
20% loss
posted on November 17, 2017 
biology
The synovial fluid between two bones get dried up as the age increases and two bones start rubbing with each other.
posted on February 10, 2017 
science
I could invent a new toy
posted on September 23, 2016 
Mechanics
20
posted on August 3, 2016 
chemistry
The balanced chemical equation for reaction of Ba(OH) and HCl is as follows: Ba(OH) + 2HCl BaCl + 2H O 1 mole Ba(OH) produce 2 moles OH ions. Number of moles of OH ion in solution = concentration of Ba(OH) x volume of Ba(OH) = 0.1 mol L x 0.03 L x 2 =
posted on April 16, 2016 
math
i am number between 35 and 45 i am completeli divisible by 13 find the number
posted on April 3, 2015 
chemistry
2/3 mole
posted on December 21, 2014 
US History
I made a 50/100 by using these answers. Useless
posted on September 13, 2014 
Math
5x+3y=23.5 5x+ y=20 +2y=3.5 y=1.75 x=(23.53y)/5 x=(23.53*1.75)/5 x=18.25
posted on December 1, 2011 
science 10
u=22.2m/s a=2.8m/s2 v=8.2m/s t=? v=u+at (equation) 8.2=22.2+(2.8)t 8.222.2=2.8t 14=2.8t ('' sign is cancelled from both the sides) 14/2.8=t 5=t hence time taken is 5 seconds
posted on August 8, 2011 
physics
i cant understand your question
posted on May 22, 2011