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Rahul covered 2 km against the wind in t hours and then covered 6 km with the wind in t hrs, the speed of the wind was 3 kmph. Find Rahul’s speed where there was no wind (in kmph)
In context with the 'Future of Wind' report released by IRENA, consider the following statements about wind energy in India:
1. Most of the wind generation in India is during the north-east monsoon season.
2. Gujarat has the highest installed wind capacity among the states.
Which of the above statements is/are true?
The time taken by a man to travel 55 m with the wind and came back to the starting point, is 16 seconds. If the speed of the wind is 37.5% of that of man without wind, then find the average speed of man during the whole journey.
After the death of Moksha, the soul of Moksha is traveling a distance which goes to the home of God with the speed of 65 km/hr against the wind, if the speed of the wind is 25 km/hr. Find the time taken if his soul travels 345 km along with the wind.
The following six (6) items consist of two statements, Statement I and Statement II. Examine these two statements carefully and select the answer using the code given below. Statement I: Geostrophic wind blows above a height of 600 metres, parallel to the isobars. Statement II: Geostrophic wind is the horizontal wind velocity, in which the Coriolis force balances the horizontal pressure force.
A wind turbine extracts maximum power from the wind when the downstream wind speed reduces to:
Directions : In each of the following questions a statement is given, followed by two conclusions. Give answer : Statements : Wind is an inexhaustible source of energy and an aerogenerator can convert it into electricity. Though not much has been done in this field, the survey shows that there is vast potential for developing wind as alternative source of energy. Conclusions : I. Energy by wind is comparatively newly emerging field. II. The energy crisis can be dealt by exploring more in the field of aero-generation.
Which part of the wind turbines senses wind speed, wind direction, shaft speed and torque?
On a winter day with atmospheric air at −15°C, the outside front wind-shield of a car has surface temperature of +2°C, maintained by blowing hot air on the inside surface. If the wind-shield is 0.5 m2 and the outside convection coefficient is 250 W/Km2, find the rate of energy loss through front wind-shield.
S1:This weather-vane often tops a church spire, tower or high building.
P :They are only wind-vanes.
Q :Neither alone can tell us what the weather will be.
R :They are designed to point to direction from which the wind is coming.
S :Just as the barometer only tells us the pressure of air, the weather-vane tells us the direction of wind.
S6:The weather-vane can, however give us some indication of other.

The Proper sequence should be: