Question
A person walks 4 m from point A towards east to reach
point B and he turns to his right and walks 5 m to reach point C. Again he turns to his left and walks 12 m to reach point D and finally he turns to his left and walks 5 m to reach point E. What is the shortest distance between point B and point D?Solution
Shortest distance between B and D = √5² + 12² = √25 + 144 = √169 = 13 m.
The escape velocity from a planet is 11.2 km/s. What is the minimum kinetic energy per kg needed to escape?
1. 6.3 x 107 J/ Kg
<...Which of the following methods is suitable for preventing an iron frying pan from rusting?
Speed of sound in air is unaffected by change in :
Two projectiles are launched simultaneously from the same point with equal initial speeds but different angles θ and (90°– θ). Which of the followi...
The hardest naturally occurring substance on Earth is:
During the fermentation of sugar, the compound which is always formed is…………?
What principle/law explains the working of the hydraulic brakes in automobiles?
On the basis of which phenomenon does a Jet Engine work?
Which one of the following oxides reacts with both acid and base?
What do we call sound waves with frequencies below 20 Hz?
