Questions asked
A Carnot engine working between 300 K and 600K has work output of 800 J per cycle. What is amount of heat energy supplied to the engine from source per cycle?
An ideal gas heat engine operates in a Carnot's cycle between 227 C and 127 C . It absorbs 6 × 104 J at high temperature. The amount of heat converted into work is .?
The coefficient of performance of a Carnot refrigerator working between 30 o C and 0 o C (a) 10 (b) 1 (c) 9 (d) 0
Ravindra Samadiya
Numerade educator
A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. What is the focal length of this mirror?
At what distance in front of a concave mirror of focal length 10 cm, an object be placed, so that its virtual image of size five times that of the object is obtained?
A train 100 m long is moving with the velocity of 72 km/hr. Find the time it takes to cross the bridge which is 2 km long?
A bullet hits a Sand box with a velocity of 20 m/s and penetrates it up to a distance of 6 cm. Find the deceleration of the bullet in the sand box.
An object moves along a straight line with an acceleration of 2 m/s2. If its initial speed is 10 m/s, what will be its speed 2 s later?