# Meenakshi

Most popular questions and responses by Meenakshi
1. ## 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?

2. ## maths

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

3. ## physics

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

4. ## maths

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

5. ## 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

6. ## physics

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

7. ## 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)

8. ## physics

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

9. ## physics

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

10. ## 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....?

11. ## 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

12. ## 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.

13. ## 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 .

14. ## 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

15. ## Maths

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

16. ## physics

What is current?

17. ## 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 .

18. ## college-physics

how to write scientific report on physics

19. ## 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.

1. ## science

acc. to me I feel let the distance be x km time for first bus = x/54 time for 2nd bus = x/36 total time = x/54 + x/36 = 90x/1944 total distance = 2x average speed = total distance / total time = 2x / (90x/1944) km/h = 2x*1944/90x km/hr = 43.2km/hr

posted on June 5, 2018
2. ## physics

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posted on October 24, 2016
3. ## physics

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

posted on May 20, 2015