# Posts by Meenakshi

Total # Posts: 23

Maths
When 100 is added to a number the result is 50 more than 3 times the number . Find the number

Physics
The length breadth and the height of the brick is 25cm,7cm and 4cm respectively.Finf the pressure exerted by the Buick when it is kept 1.horizontally, 2.Vertically on a muddy floor and compare.

physics
the upthrust on a boat is 1000 N what is the weight of the boat

physics
If your weight is 300 N what is the upthrust on you when you are floating in water

physics
if the weight of the stone was 2 N and the upthrust was 1 N what weight would the force meter show?

physics
Electric current is expressed by the amount of charge flowing through a particular area in unit time

physics
What is current?

physics
an object is placed 15 cm in front of a convex lens of focal length 10cm. Find the nature and position of the image formed. where should a concave mirror of radius of curvature 20cm be placed so that the final image is formed at the position of the object itself.

maths
if the LCM of first 20 natural numbers is X, then what will be the LCM of first 25 natral numbers

maths --plse help me..
The angle of elevation of the top of a tower as observed from a point on the ground is alpha and on moving a meters towards the tower, the angle of elevation is beta .prove that the height of the tower is a (tan alpha*tan beta)/(tan beta - tan alpha)

maths --plse help me..
The pilot of an aircraft flying horizontally at a speed of 1200 Km/hr observes an angle of depression of a point on the ground changes from 30 degree to 45 degree in 15 seconds. Find the height of the aircraft at which it is flying?

maths
Let a,b,c be positive integers such that a divides b^2 , b divides c^2 and c divides a^2 . Prove that abc divides (a + b + c)^7 .

maths --plse help me..
Let a,b,c be positive integers such that a divides b^2 , b divides c^2 and c divides a^2 . Prove that abc divides (a + b + c)^7 .

maths -profit and loss
The profit on a certain item is 20%. If the CP is increased by Rs 50 and SP is increased by Rs 30 then the profit 5 reduces by 3 1/3%. Find the original CP and SP.

maths-probability
plse explain me again..

maths-probability
if a cube of 10 X 10 X 10 is slices into 1 X 1 X 1 cubes and then rearranged as earlier.if the outer most layer of cubes fall, how many cubes fall and how much are left....?

maths
Find a30 -a20 for the AP a, a+d, a+2d, a+3d........

physics
on a cool night with no wind, people facing a campfire feel a breeze on their backs explain

chemistry
N2+ 3H2 GIVES 2NH3 = -90.5 4NH3+5O2 GIVES 4NO+6H20 =-905.1 H2 +0.5 O2 GIVES H2O =-241.1 USE THESE VALUES TO DETERMINE ENTHALPHY CHANGES

college-physics
how to write scientific report on physics

college-chemistry
calculate the ph of a buffer solution prepared by adding 0.397 mole of the sodium salt of a weak organic acid HA to 0.474 L of 1.023m acid HA with pka=4.82 and diluting to 1.00 L WITH WATER

physics
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