Sunday

April 20, 2014

April 20, 2014

Total # Posts: 39

**physics**

the weight of a solid is 80g in air and 50g in liquid of relative density 1.5. calculate the relative density of the solid.

**maths**

can we mark 2 or more points common to two angles

**maths**

in triangle abc if ab=bc then angle a = angle c or angle a = angle b

**maths**

factorise a^12x^4-a^4x^12

**maths**

factorise a^7+ab^6

**maths**

express 15.7121212... in the form p/q where p and q are integers and q not equal to 0.

**maths**

simplify 7*3^1/2-5*2^1/2/(48^1/2-18^1/2)

**maths**

simplify (3+3^1/2)((2+2^1/2))^2

**physics**

a body travels half of its total path in the last second of its free fall from rest.what is the duration of fall . you have answered the question before but the answer my mam gave is 3.4sec but you have solved it to 1.4sec .plz solve it for me

**physics**

Between two stations a train acclerates uniformly at first, then moves with constant velocity and finally retards uniformly. If the ratio of the time taken be 1:8:1 and the max speed attained be 60km/h then what is the average speed over the whole journey?

**physics**

a body travels half of its total path in the last second of its free fall from rest.what is the duration of fall .

**maths**

if the sides of a triangleABC is 16cm,19cm and 15cm what about the angleB is it the greatest or smallest angle or is angleB = angleC or ia angleA the smallest angle? plz help

**maths**

factorize a^3+b^3+c^3-3abc

**maths**

if x=3+8^1/2, find x^4+(1/x^4)

**maths**

if x=1/(2-3^1/2) prove that x^3-2x^2-7x+5=3

**maths**

if a=(3^1/2+2^1/2)/(3^1/2-2^1/2) b=(3^1/2-2^1/2)/(3^1/2+2^1/2) find a^3+b^3

**maths**

factorize 2*2^1/2x^3+3*3^1/2y^3+5^1/2(5-3*6^1/2xy)

**maths**

factorize (x^2-4x)(x^2-4x-1)-20

**physics**

a car accelerates from rest at a constant rate 'a' for some time. after which it decelerates at a constant rate'b' and comes to rest. if the total time elapsed is t second, evaluate 1) the maximum velocity reached and 2) the total distance travelled. the answer...

**physics**

a car accelerates from rest at a constant rate 'a' for some time. after which it decelerates at a constant rate'b' and comes to rest. if the total time elapsed is t second, evaluate 1) the maximum velocity reached and 2) the total distance travelled.

**physics**

a stone is thrown vertically upward with an initial velocity u from the top of tower, reaches the ground with a velocity 3u. what is the height of tower?

**physics**

a body travels half of its total path in the last second of its free fall from rest.what is the duration of fall?

**physics**

a body thrown vertically upward returns to the earth in 3sec what was the initial velocity of the body? what height did the body reach? neglect the resistance of air. The answer after solving is 14.7m/s and 11m. please tell me how the answer is arrived.

**physics**

a point moving on a straight line traversed half the distance with a velocity v0. the remaining part of the distance was covered with velocity v1 for half the time, and with velocity v2 for the other half of the time. find the mean velocity of the point averaged over the whole...

**physics**

a car moving on a straight road with a speed of 20m/s. at t=0 the driver of the car applies the breaks after watching an obstacle 150m ahead. after application of breaks, the car retards with 2m/s^2. find the position of the car from the obstacle at t=15s.

**physics**

two ends of a train moving with constant acceleration pass a certain point with velocities u and v. what is the velocity with which the middle point of the train passes the same point? I have asked this question before you have answered u+v/2. but my mam says it is (u^2+v^2/2)...

**physics**

The two ends of a train moving with a constant acceleration pass a certain point with velocities u and v.what is the velocity with which the middle point of the train passes the same point?

**physics**

A car trvelling at 60km/h overtakes another car travlling at 42km/h.Assuming each car to be 5.0m long.find the time taken during the overtake.

**physics**

a body is thrown vertically upward return to the earth in 3sec. (a)what was the initial velocity of the body (b)what height did the body reach? neglect the resistance of air.

**physics**

a body is released from a height and falls freely towards the earth. exactly one sec later another body is released.what is the distance between the two bodies 2sec after the release of the second body. if g=9.8m/s^2.

**physics**

two balls are dropped to the ground from different heights. one ball is dropped 2s after the other but they both strike the ground at the same time, 5s after the first is dropped. what is the difference in height from which they are dropped? from what height was the first ball...

**physics**

two boys start running straight towards each other from two points that are 100m apart. one runs with a speed of 5m/s, while other moves at 7m/s.how close are they to the slower one's starting point when they meet?

**physics**

a stone falls from a cliff and travels 34.3 in the last second before it reaches the ground. calculate the height of the cliff?

**physics**

a stone falls from a cliff and travels 34.3m in the last second before it reaches the ground. calculate the height of the cliff.

**physics**

aball is thrown vertically upward with a speed v from a height h above the ground. find the time taken for the ball to strike the ground.(consider acceleration due to gravity =g)

**physics**

a stone is thrown vertically upward with an initial velocity v0. the distance travelled by it in time 1.5v0/g

**algebra**

how to prove that (a^2-b^2)^3+(b^2-c^2)^3+(c^2-a^2)^3=3 (a^2-b^2)(b^2-c^2)(c^2-a^2) please help

**algebra**

prove (a^2-b^2)^3+(b^2-c^2)^3+(c^2-a^2)^3=3(a^2-b^2)(b^2-c^2)(c^2-a^2)

**physica**

a stone is thrown vertically upward with an initial velocity v0. the distance travelled by it in time 1.5v0/g?

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