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Most of the ultraviolet radiation in sunlight is absorbed by oxygen in Earth's atmosphere, which forms the ozone layer of the lower stratosphere. UV light is found in sunlight (where it constitutes about 10% of the energy in vacuum) and is emitted by electric arcs and specialized lights such as black lights. It can cause chemical reactions, and causes many substances to glow or fluoresce. Most ultraviolet is classified as non-ionizing radiation.
Speed of a car is 150% more than that of a bus. Find the distance traveled by the bus in 6 hours 30 minutes if the time taken by the car to cover 960 km...
A car covers its journey at the speed of 80 km/hr in 10 hours. If the same distance is to be covered in 4 hours, by how much the speed of the car will h...
A train travels from A to B at a speed of 60 km/h, and then from B to C at a speed of 80 km/h. The total distance covered from A to C is 240 km, and the...
A bus starts running with the initial speed of 6 kmhr and its speed increases every hour by certain amount. If it takes 14 hours to cover a distance of ...
The ratio of the speed of car to that of a train is 15:22. If the speed of the train is 35 Km/hr more than that of the car, what is the speed of the car?
Find the distance travelled (in km) by the truck to reach point B from point A, if a car cover 45% the same distance in 2 hours 42 minutes and a truck c...
A man travels some distance at a speed of 32 km/hr and returns at a speed of 24 km/hr. If the total time taken by him is 2 hrs 20 min, the distance is
Rajesh whose speed is < 4 m/s travels along a rectangular path. The diagonal length of the park is 5x(13) (1/2) He reaches from one point of ...
Ajay and Vishal left the place ‘X’ with different speeds which are in the ratio 9:5 respectively. Ajay left the place 36 seconds after Vishal. If af...
A boy goes to his school at 1/6th of the speed at which he returns from his school. Average speed during the whole trip (i.e. one round) is 24 km/h. Wha...