# ridhi

Most popular questions and responses by ridhi
1. ## kinetic theory

Air is filled at 60deg C in a vessel of open mouth. Upto what temperature should the vessel be heated so that one-fourth of the air may escape? Ans 171degC

2. ## physics(heat)

a mixture of 250g of water and 200g of ice at 0deg C is kept in a calorimeter which has a water equivalent of 50g. if 200g of steam at 100deg C is passed through this mixture, calculate the final temperature and the mass of contents of the calorimeter. ans

3. ## Maths

An insect climbs 10m slippery rock in a minute and then slips down 9m in the next minute. How long will it take him to climb a 30m slippery rock?

4. ## Physics

A ball is thrown towards a vertical wall from a point 2m above the ground and 3m from the wall. the initial velocity of the ball is 20m/s at an angle of 30deg above the horizontal. if the collision of the ball with the ball is perfectly elastic. how far

5. ## social science

Ways to protect the monuments like Konark,khajuraho,Sanchi,Ajanta&Ellora.(Aiso give need to preserve and protect the monuments.) Monuments can be protected by limiting tourists, keeping cars, trucks, and buses as far away as possible, and protecting the

6. ## physics

while standing on an open truck moving at a velocity of 35m/s, a man sees a duck flying diresctly overhead. The man shoots an arrow at the duck and misses it.. the arrow leaves the bow at a vertical velocity of 98m/s. the truck accelerates to a constant

7. ## physics

Two projectiles A and B are projected at the same time in the same vertical plane. A is projected at a height of 2m above the ground making an angle of 30deg with the horizontal. B is projected with the velocity of 20m/s at an angle of 60deg with the

8. ## physics(heat)

A geyser heats water flowing at the rate of 3L/min from 27 deg C to 77 deg C. if the geyser operates on a burner, what is the rate of combustion of the fuel if its heat of combustion is 40000J/g?

9. ## physics

A stone is thrown from a building of height 40m and reaches a maximum height of 49m from the ground. The stone strikes the ground at a distance of 10m from the foot of the building. find the angle of elevation from which the stone is projected. Assuming

10. ## physics

The length l of a simple pendulum is about 0.5m, and can be measured within 1mm. what accuracy is required in the measurement of periodic time T of 100 oscillations if the error in l and T are to produce equal percentage in the calculation of acceleration

11. ## physics

an object of mass 0.1kg is rotated in a horizontal circle by a string 1m long. the maximum tension in the string before it breaks is 50N.what is its maximum frequency reached?

12. ## physics(heat)

A geyser heats water flowing at the rate of 3L/min from 27 deg C to 77 deg C. if the geyser operates on a burner, what is the rate of combustion of the fuel if its heat of combustion is 40000J/g?

13. ## physics

why when steady state conditions apply the rate of heat flow is the same?

14. ## physics conduction

a one brick thick wall of 10cm thickness has temperatures 40deg C and 5deg C at the surfaces. if the thermal conductivity of the brick is 0.6W per m per K, what is the rate of heat flow per unit area W per m square through the bricks if steady state

15. ## maths

If the pth term of an AP is q and the qth term is p, prove that its nth term is (p+q-n).

16. ## physics

two children ride bicycle towards each other with instant velocity of 20m/s and 10m/s. Each child releases a ball 6m above the ground with forward horizontal velocity of 40m/s relative to the bicycle. if the two balls collide in above the ground. what was

17. ## physics

a metal cylinder containing water at 60ged C, has a thickness of 4mm.And the thermal conductivity 400W per m per K. it is lagged by felt of thickness 2mm and thermal conductivity 0.002W per m per K. the room temperature is 10deg C.Find the temperature

18. ## projectiles

two children ride bicycle towards each other with instant velocity of 20m/s and 10m/s. Each child releases a ball 6m above the ground with forward horizontal velocity of 40m/s relative to the bicycle. if the two balls collide in above the ground. what was

19. ## science

what is the importance of food?

1. ## physics(heat)

thank you so much :)

posted on June 1, 2012
2. ## physics

thanks so much :)

posted on June 1, 2012
3. ## physics

thanks :)

posted on May 29, 2012
4. ## maths

thnaks :)

posted on May 5, 2012
5. ## physics

thanks :)

posted on May 1, 2012
6. ## physics

thnakss soo much

posted on April 29, 2012
7. ## physics

hmmm...ok thanks :)

posted on April 29, 2012
8. ## kinetic theory

thank you soo much :)

posted on April 29, 2012
9. ## projectiles

sorry ''in'' isnt there!

posted on April 29, 2012
10. ## physics

thanks alot...it was an easy method :)

posted on April 29, 2012
11. ## physics

are you sure we can use length of the string 1m as the radius? and why?

posted on April 29, 2012
12. ## physics

no the answer is 1.6 revolutions per second

posted on April 29, 2012
13. ## Physics 30

given; u=30km/hr=30*10/36=8.33m/s v=50km/hr=50*10/36=13.88m/s a=2.5m/s^2 a=(v-u)/t t=5.55/2.5 =2.22s so the answer is a

posted on April 20, 2012
14. ## Physics

Ok. The answer is 32.53m And i got that. I didn't use the L equation Instead i found the time taken to reach h=0m then found R using R=(VoCosα)t THANK YOU ALL SOO MUCHHH!!!! IT WAS GIVING ME A TOUGH TIME! :)

posted on April 13, 2012