Tuesday

January 17, 2017
Total # Posts: 59

**Maths**

ABCD is a trapezium in which AB//DC and AB=70cm DC=50cm. If P and Q are respectively mid points of AD and BC. Find PQ and show that ar(trapezium DCQP)=9/11ar(trapezium ABQP)

*January 6, 2017*

**Physics C: Mechanics**

A 1.00 kg mass is attached to a string wrapped around a cylinder of radius 0.05m. Two masses are connected with a rod and attached to the end of the cylinder, perpendicular to its axis. as the mass falls from rest the rotating contraption spins through 12 pi radians in 1.2 ...

*November 13, 2016*

**Phyisics**

A horizontal shelf moves vertically with simple harmonic motion of period 1.5 sec. What is the greatest amplitude that the shelf can have so that the objects resting on it never leav it?

*September 21, 2016*

**Science**

1953) Sodium benzoate and benzoic acid are mixed in equimolar ration to form buffer if pKa is 2 what will be the pH? A. 0 B. 1 C. 2 D. any one

*July 7, 2016*

**Science**

A student goes to college,driving his car at 20 km per hour. He returns though same route ,driving at 40 km per hour . Find average speed during entire journey

*May 7, 2016*

**math**

294cm²

*January 7, 2016*

**physics**

The descending pulley has a radius R and mass M.Find the acceleration of block of mass m placed, on the smooth surface and connected with another light pulley.

*December 25, 2015*

**physics**

the descending pulley has a radius R and mass M.find the acceleration of block of mass m placed, on the smooth surface and connected with another light pulley

*December 25, 2015*

**physics**

average velocity =displacement/time=1000Km/15hr=200/3=200*1000/3*3600=500/27m/s

*December 25, 2015*

**physics**

average velocity = displacement/time=1000km/15hr=200/3=200*1000/3*3600=500/27m/s

*December 25, 2015*

**math**

F ind the product of two odd integers.

*April 11, 2015*

**math**

The measures of the angles of the quadrilateral are in the ratio 2:4:6:8. Find the measure of each angle.

*April 11, 2015*

**math**

There are 10 batmans. the runs scored by the batmans are 1,2,3,4,5,6,7,8,9 and 10. Find the average scored bt them.

*April 11, 2015*

**maths**

find the SI and amount of- $225 for 3 years 9 months at 16%p.a

*April 10, 2015*

**physics (gravitation)**

At what height above the surface of the earth does the acceleration due to gravity reduces by 64% .radius of earth 6400 km

*February 6, 2015*

**Grammar**

I beg you for forgiveness, if there is any incorrect evaluation. He is very young not advisable to assign to bigger tasks in the filed. Pls correct the mistakes.

*October 23, 2014*

**Algebra**

40 Year,13year

*October 5, 2014*

**ENGLISH - SITES**

please guide me to understand phrases with explanation.

*September 28, 2014*

**ENGLISH - GRAMMAR ????**

please guide me to understand phrases with explanation.

*September 28, 2014*

**chemistry**

A mixture of CO and CO2 having a volume of 20 ml is mixed with x ml of oxygen and electrically sparked. The volume after explosion is (16 + x)ml under the same conditions. What would be the residue volume if 30 ml of the original mixture is treated with aqueous NaOH? (a) 12 ml...

*August 21, 2014*

**maths**

how many cubes of side 1cm will make a cube of side 3cm

*August 3, 2014*

**MATH**

If the lengths of the sides of a triangle are in the ratio 8:4:5 and its perimeter is 48cm find its area

*July 18, 2014*

**computer**

how do cell phone works,answer in short paragraph

*July 6, 2014*

**Financial Math**

tisa received $5200 on a deposit she made five years and eight months ago. The interest rate was is 6.7% p.a. compounded quaterly. How much interest was included in amount he received?

*June 13, 2014*

**Financial Math**

An investment of $2500 accumulates at 6% p.a compounded semi annually for 3 years. At that time, the interest rate is changed to 5% compounded monthly. How much is the investment worth 2 years after the change in interest rate? What is interest gained at the end of the 5 years.

*June 13, 2014*

**MATHS - AREA**

The wall around a playground is 410m. If one wall along the length is 80m long, what is the length of the wall along the breadth? What is the area of the playground?

*April 15, 2014*

**MATHS - HCF**

Find the least number when divide by 25, 45, 60 leaves reminder 20. 2) Find the least number which when divided by 18, 12, 24 leaves a reminder of 16, 10, 22 respectively. Can U help me to find the answer.

*April 11, 2014*

**maths - hcf**

1) Find the least number when divide by 25, 45, 60 leaves reminder 20. 2) Find the least number which when divided by 18, 12, 24 leaves a reminder of 16, 10, 22 respectively. Can U help me to find the answer.

*April 10, 2014*

**maths - HCF**

Excellent. Thanks

*April 8, 2014*

**maths - HCF**

The product of HCF and LCM of two numbers is 119. Find the two numbers if one of the numbers is not 1. Please help me to solve this.

*April 8, 2014*

**grammar - tense**

I will at the airport. I will be a the airport. which statement is correct for simple future. Please explain the fact behind it.

*April 8, 2014*

**maths**

5x+3y=4 [eqn.1] 3x+4y=9[eqn.2] now, x=4-3y/5[eqn.3] Now putting the value of x in eqn.2 3(4-3y/5)+4y=9 12-9y/5+4y=9 12-9y+20y/5=9 12+11y=45 11y=33 y=3 And x=4-3y/5 x=4-3*3/5 x=4-9/5 x=-1

*January 10, 2014*

**Math 8th grade**

-24

*November 9, 2013*

**chemistry**

A commercially available sample of sulphuric acid is 15% H2SO4 by mass (density=1.10g/ml) Calculate the molarity ,normality and molality.

*June 3, 2013*

**chemistry**

for an aqueous solution having Calcl2 (2molar) and Mgcl2 (5molal) and specified gravity of solution is 1.145 calculate molality of chloride ion and molality if chloride ion.

*May 10, 2013*

**Math**

Each side of a rhomus is 10 cm if

*September 15, 2012*

**physics to Drwls**

a)(a) What is the spring constant of the spring? 51.3 N/m (b) Luke now pulls the brick 5.1 cm from the equilibrium position to watch it oscillate. What is the maximum speed of the brick? .35 m/s So would you subtract 2.55 cm from 5.1 cm? To get how much was stretched?

*March 31, 2012*

**physics**

Luke is trying to catch a pesky animal that keeps eating vegetables from his garden. He is building a trap and needs to use a spring to close the door to his trap. He has a spring in his garage and he wants to determine the spring constant of the spring. To do this, he hangs ...

*March 31, 2012*

**Physics to Elena**

Thank you, but I tried this answer its wrong and I don't know why!

*March 30, 2012*

**Physics**

So what is Vm m/s and Am m/s^2 Thank you!

*March 30, 2012*

**Physics**

The prong of a tuning fork moves back and forth when it is set into vibration. The distance the prong moves between its extreme positions is 2.28 mm. If the frequency of the tuning fork is 440.6 Hz, what are the maximum velocity and the maximum acceleration of the prong? ...

*March 30, 2012*

**physics**

Thank you so much; I really appreciate it!

*March 29, 2012*

**physics**

A spoked wheel with a radius of 44.0 cm and a mass of 1.90 kg is mounted horizontally on frictionless bearings. JiaJun puts his 0.550-kg guinea pig on the outer edge of the wheel. The guinea pig begins to run along the edge of the wheel with a speed of 18.0 cm/s with respect ...

*March 29, 2012*

**MATH**

The base and height of a triangle are in the ratio 5:3.if the area of the triangle is 67.5 square metre.find its base and height.

*October 23, 2011*

**MATH**

THE BASE AND HEIGHT OF A TRIANGLE ARE IN THE RATIO 5:3. IF THE AREA OF THE TRIANGLE IS 67.5 SQUARE METRE; FIND ITS BASE AND HEIGHT.

*October 23, 2011*

**algebra**

at least 17

*September 25, 2011*

**chemistry**

An aluminium can contains ferrous sulphate solution. It is observed that after a few days it develops holes in it. Explain the observation and write the chemical equation for it.

*May 31, 2011*

**Maths**

If a marble of radius 2.1 cm is put into a cylindrical cup of radius 6cm and height 8cm, then how much water flows out of it.?

*January 23, 2011*

**chemistry**

titration of phosphoric acid in presence of excess h2po4-, changes in equivalence point??

*January 19, 2011*

**math**

mujhe simple interest ka method samajh nahi ataa. question-a some of money double itself 10 year the number of year it wood trebles itself is.........

*January 1, 2011*

**8th grade**

Who was influenced negatively by the southern code of behaviour in the autobiography of miss jane pittman, and how?

*October 8, 2010*

**Chemistry**

Is that 40250000 is the right answer.

*July 21, 2008*

**SCIENCE**

TAKE A BOWL OF WATER AND PLACE IT NEAR A SUNLIT WINDOW. PLACE A MIRROR IN WATER AND USE A WHITE CARD AS 0SCREEN POINT.ADJUST THE MIRROR TO AN ANGLE WHERE IT PROJECTS THE COLOURS OF LIGHT ON THE SCREEN. TELL ME YOUR OBSERVATION AND EXPLAIN HOW THIS PHENOMENON OCCURS.

*June 10, 2008*

**science**

what is sublimation?

*May 1, 2008*

**sst**

how i make a poster on social evil

*May 1, 2008*

**pre-calculus-check over work**

1). change to exponential form: log2^256=8; 2^8=256 log0.0001=-4; 10^-4=0.0001 2). change to logarithmic form: 5^3=125; log5^125=3 4^-3=1/64; log4^1/64=-3 3). solve the equation: 3^(x-2)=27^(x+1) 3^(x-2)=(3^3)^(x+1) 3^(x-2)=3^(3x+3) x-2=3x+3 -5=2x -5/2=x 2^(x^(2)+1)=4^(x+2) 2...

*April 21, 2008*

**chemistry**

Thank you for your help.

*April 15, 2008*

**chemistry**

(1.3 atm)(29L)=(P2)(3.9) 9.66=P2

*April 15, 2008*

**chemistry**

A sample of gas occupies 29 L under a pressure of 1.3 atm. What would the resulting volume be if the pressure were increased to 3.9 atm if the temprature did not change?

*April 15, 2008*

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