Wednesday

April 23, 2014

April 23, 2014

Total # Posts: 49

**Math**

A man completed a trip of 136 km in 8 hrs. Some part of the trip was covered at 15 km/hr. What is the part of the trip covered at 18 km/hr?

**Math**

The length of a rectangle is twice it's width. If it's perimeter is 54cm, find its length. Explain!

**Maths**

A man is 42 years old and his son is 12 years old. In how many years will the age of the son be half the age of the man at that time? Explain!

**Maths**

Separate 178 into two parts such that the first part is 8 less than twice the second part. Explain!

**Maths**

A number decreased by 30 is the same as 14 decreased by 3 times the number. Find the number. Explain!

**Chemistry**

What is the difference between solubility and solubility curve?

**Science**

Who stated the three laws of motion?

**Math**

Bob has three sacks of apples and three more apples in his pocket. Each sack contains the same number of apples. All together, Bob has 33 apples. How many apples are in each sack?

**Geography**

Where is plateau of Arabia located?

**math**

A store has 2 times as many hooded sweatshirts as crewneck sweatshirts. The total number of sweatshirts is 36. How many hooded sweatshirts does the store have?

**science**

it gives pbi2 hdj

**science**

what happens when lead nitrate react with potassium hydroxide

**maths**

The sum of odd squares can be expressed as 1^2+3^2+5^2+…+(2n-1)^2=An^3+Bn^2+Cn+D. The value of A can be expressed as a/b, where a and b are positive co-prime integers. What is the value of a+b?

**science**

The most convenient way to express vectors in the two dimensional plane is in the familiar (x,y) Cartesian coordinates. However, one can express vectors in other coordinate systems as well. For example, another useful coordinate system for the plane is polar coordinates (r, ...

**math**

Bella keeps a supply of red, blue, and black pens in a drawer. The drawer has 13 red pens, 18 blue pens, and 8 black pens. If Bella wants a red pen, what is the minimum number of pens she has to pull out from the drawer to make sure she gets a red pen?

**Physics**

Calculate the work required to be done to stop a car of 1500kg moving with a velocity of 60km/hr?

**plzzzzzzz help me out.**

a beam of light consisting of two wavelengths 800nm and 600 nm is used to obtain the interference pattern in youngs double slit expt on a screen placed 1.4m away.if two slits are seperated by 0.28mm,calculate the least distance from the central bright maximum where the bright ...

**HELP>>PLZ**

the vertical component of earth magnetic field at a place is root3 times the horizontal component.What is the value of angle of dip at this place?

**Physics**

At what temp would an intrensic semiconductor behave like a perfect insulator?Why?

**Physics**

oye thanku sooo much..nyc:)

**Physics**

X and Y are two capacitors(parallel plate) connected in series to a 12V supply.X has air between the plates and its capacitance is 10microfarads.Y contains a dielectric medium of K=5.calculate capacitance of Y and the potential difference between the plates of Y.

**Physics**

in a wire AB of uniform cross section in which a potential gradient of 0.1 V/m exist.If the balancing point is foung to be 180 cm from A then what is the Emf of the cell?

**Physics**

what is the power dissipated in an ac circit in which current v=230sin(wt+90) and I=10sin(wt)...plz help me

**Physics**

Two metallic wires of the same material have the same length but cross-sectinal area is in the ratio of 1:2.they are connected in 1)-series 2)-parallel. Compare the drift velocities of the electrons in the two wires in both the cases. Plzz help

**MMSS**

the volume of 500g sealed packet is 350 cubic centimeters. Will the packet float or sink in the water if the density of water is 1 gm per cubic meter ? What will be the mass of water displaced by this packet

**Math**

Plz cud sombdy show me long division method of x^4/(x-1)(x^2+1)???? Plz note (x-1)(x^2+1) is in the denominator.

**Math**

Plz cud sombdy show me long division method of x^4/(x-1)(x^2+1)???? Plz note (x-1)(x^2+1) is in the denominator.

**Math**

Plz cud sombdy show me long division method of x^4/(x-1)(x^2+1)???? Plz note (x-1)(x^2+1) is in the denominator.

**physics**

The resultant will be maximun when cosine of the angle b/w them is is 0..ie 1 then R=(5^2+5^2+2*5*5cos(0))^1/2

**Maths**

3

**physics**

A boy is riding a bicycle in a rainy day. The force exerted by the boy and the force due to which rain falls downward.

**physics**

A boy is riding a bicycle in a rainy day. The force exerted by the boy and the force due to which rain falls downward.

**physics**

A boy is riding a bicycle in a rainy day. The force exerted by the boy and the force due to which rain falls downward.

**Calculus**

If y=Root of(logx+root of (logx+root of logx.........infinty)...prove that dy/dx=1/x(2y-1)

**MATHS**

The only thing i have as a doubt is how com e^(lnx^3)=x^3 ?!?!?!?:O

**MATHS**

If e^(x+3logx) then prove that dy/dx=x^2(x+3)e^x....can anyone help me out...plz note 3+logx is in adition with x and is the power of 'e' its not e^x+3logx

**Math**

If y=e^x+3logx then prove that dy/dx=x^2(x+3)e^x.

**physics**

100000/75 cm

**science (physics)**

five examples of potential energy with diagram

**math**

If the perimeter of a parallelogram is 140 m, the distance between a pair of opposite sides is 7 meters and its area is 210 sq m, find the length of two adjacent sides of the parallelogram.

**trig**

=Sin(90-71)/cos71 =cos71/cos71 =1

**algebra**

a two digit number is four times the sum of its digits and twice the product of the digit. find the number using elimination method

**History**

What were the various changes that had taken place in Europe at the beginning of the middle ages ? What were the main characteristics of the middle ages in Europe?

**maths**

a steamer goes downstream in a river and covers the distance between upstream in 6 hours if the speed of the stream is 3 km/hr. firnd the speed of the steamer in still water.

**Maths**

denominator of a fraction is 1 more than its numerator. the fraction reduces to one fourth when numerator is reduced by 2 and denominator is increased by 3. find the number

**physics**

Two forces acting on a body in opposite directions,have the resultant velocities of 10newton. if they act at right angles to each other, the resultant is 50 newton.find the two forces.

**mechnical engineering**

what is rankine cycle?

**maths**

how many times does minute hand rotate in one day? There are 60 minutes in an hour and 24 hours per day. With this information, can you answer your question? I hope this helps. Thanks for asking.

**Chemistry Electron Configuration Questions**

Valance Electrons?

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