Recently Active Questions

The engineer on a 100 km/hr fast train suddenly becomes aware that a slower train traveling 20 km/hr has pulled out on the main line. At this point a distance of 1/2 km separates them. With what deceleration must the engineer ...

A train travels at 50km/hr. towards a railways station 100km far. A watch train goes from the train to the station and back at 100km/hr till the train reaches the station. What ist the ratio of the distance travelled by the t ...

A man is travelling at 4m/s towards the east. The rain is falling vertically at 5m/s downwards. What is the velocity of the rain wrt the boy? ...

find the ratio of radius of first three Bohr orbits ...

When electrons revolve in stationery orbits ...

The ratio of the rate of diffusion of a given element to that of helium is 1.4. The molecular weight of the element is ...

50 volumes of H2 take 25 minutes to diffuse out of vessel. How long will 40 volumes of oxygen take to diffuse out from the same vessel under similar conditions? ...

let the time taken by Helium in diffusing vol. V be t. What time will methane take in diffusing same volume? ...

Volume of oxygen diffused in time t is V. What will be the volume of hydrogen diffused in same time? ...

The rate of diffusion of oxygen as compared to ozone is ...

The densities of two gases are in the ratio of 1:16. The ratio of their rates of diffusion is ...

The ratio of rates of diffusion of SO2,O2 and CH4 is ...

The rate of diffusion of methane at a given temp. is twice that of gas Y. The molecular mass of Y is ...

If 4 g of oxygen diffuse through a very narrow hole, how much hydrogen would have diffused under identical conditions? ...

The rate of diffusion of a gas is proportional to ...

Assertion: For a looping vertical loop of radius r, the minimum velocity at the lowerst point is 5gr Reasoning: The velocity at the top is gr ...

For the problems 9 and 10, Chose which is correct (A) If both Assertion and Reason are true and Reason is the corect explanation of the Assertion (B) If both Assertion and Reason are true and Reason is not the corect explanat ...

A body in circular motion starts from rest with a tangential acceleration of 1 m/s2 The circular path has radius of 10m. What is its acceleration after 10 seconds. ...

A body is revolving with a uniform speed u in a circle of radius r. The tangential acceleration is given by? ...

For a body to move along a circular path, which is the necessary criterion? ...

The ratio of the speeds of hour and second hand is ...

An aero-plane waiting for an empty slot on the landing strip makes 1 and a half rounds of the city with a radius of 10km in the air. It stays there for 400 seconds. What is its average velocity during these 400 seconds? ...

An aero-plane waiting for an empty slot on the landing strip makes 1 and a half rounds of the city with a radius of 10km in the air. It stays there for 400 seconds. What is its average velocity during these 400 seconds? ...

a container of 1 litre contains hydrogen gas at 6 atm, another container of volume 2 litre contains oxygen gas at 12 atm. Now the containers are joined to each other such that gases mix. find the total pressure exerted by mix ...

Equal volumes of two gases which do not react together are enclosed in separate vessels. Their pressures at 1 atm & 3 atm respectively.If the two vessels are joined together, then what will be the pressure of the resulting mi ...

A container containing gases 4 mol of methane and 12 mol of oxygen, find the ratio of the pressure exerted by them ...

In a flask of 10 litres, 0.2 mol of oxygen, 0.4 mol of nitrogen, 0.1mol of ammonia and 0.3 mol of helium are enclosed at room temperature. If the total pressure exerted by these gases is 1 atm, the partial pressure exerted by ...

Same mass of CH4 & H2 is taken in a container. The partial pressure caused by H2 is ...

Equal weights of two gases of molecular weight 4 & 40 are mixed. The pressure of the mixture is 1.1 atm. The partial pressure of the heavier gas in the mixture is ...

What will be the partial pressure of H2 in a flask containing 2 g of H2, 14 g of N2 & 16 g of O2? ...