Question
Karan walks at a steady pace of 12 km/h and covers a
certain distance in 10 hours. What speed must he maintain to complete the same journey in 6 hours?Solution
ATQ,
Distance travelled by Karan in 10 hours = 12 × 10 = 120 km
So, required speed = 120 ÷ 6 = 20 km/h
The acceleration due to gravity ___________ with height
The method of transfer of heat in liquid is
Who discovered the electron?
Smog is a combination of –
How does an earphone convert electrical signals into sound?
Which of the following liquids has the least density?
Iron, Nickel and Cobalt are the examples of
The SI unit of Pressure is
Why does a solid chunk of iron float in mercury but sink in water?
Speed of sound in air is unaffected by change in :