MCQ
Age of the universe is about $10^{10}$ year, whereas the mankind has existed for $10^6$ year. For how many seconds would the man have existed if age of universe were $1$ day?
  • A
    $9.2s$
  • B
    $10.2s$
  • $8.6s$
  • D
    $10.5s$

Answer

Correct option: C.
$8.6s$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Consider a particle of mass $m$ having linear momentum $\vec p$ at position $\vec r$ relative to the origin $O$ . Let $\vec L$ be the angular momentum of the particle with respect the origin. Which of the following equations correctly relate $(s)\, \vec r,\,\vec p$ and $\vec L$ ?
The acceleration of a train travelling with speed of $400 \,m/s$ as it goes round a curve of radius $160\,m$, is
In a medium sound travels $2\, km$ in $3\, sec$ and in air, it travels $3 \,km$ in $10\, sec$. The ratio of the wavelengths of sound in the two media is
A body is moving in a circular path with a constant speed. It has
Three balls of same masses are projected with equal speeds at angle $15^{\circ}, 45^{\circ}, 75^{\circ}$, and their ranges are respectively $R_1, R_2$ and $R_3$, then
Two sources of sound of same frequency are placed at a distance of $100\,m$ from each  other. An observer moving in between them hears $4$ beats per second. If the distance  between the sound sources is increased to $400\,m$, then number of beats heard by him will be :-
A train is moving towards east and a car is along north, both with same speed. The observed direction of car to the passenger in the train is
Four identical solid spheres each of mass $'m'$ and radius $'a'$ are placed with their centres on the four corners of a square of side $'b'$. The moment of inertia of the system about one side of square where the axis of rotation is parallel to the plane of the square is
The escape velocity from earth is ${v_{es}}.$ A body is projected with velocity $2{v_{es}}$ with what constant velocity will it move in the inter planetary space
When an aeroplane takes off from the ground: