Related Questions

Mr. Ali decided to walk down the escalator of a tube station. He found that if he walks down 26 steps, he requires 30 seconds to reach the bottom. However, if he steps down 34 stairs he would only require 18 seconds to get to the bottom. If the time is measured from the moment the top step begins to descend to the time he steps off the last step at the bottom, find out the height of the stair way in steps?
A 23 steps
B 16 steps
C 46 steps
D 26 steps
The effect of changing the evaporator temperature on COP as compared to that of changing the condenser temperature (in vapour compression refrigeration system) is
A Less pronounced
B More pronounced
C Equal
D Data insufficient, can't be predicted
What is the change in the angular momentum of a system as per the Law of Conservation of Angular momentum, if the total external torque acting is zero?
A Remains constant
B Becomes zero
C Increases exponentially
D None of the above
A disc is a spinning with an angular velocity $$\omega $$ rad/s about the axis of spin. The couple applied to the disc causing precession will be (where $$I$$ = Mass moment of inertia of the disc and $$\omega {\text{P}}$$  = Angular velocity of precession of the axis of spin)
A $$\frac{1}{2}I{\omega ^2}$$
B $$I{\omega ^2}$$
C $$\frac{1}{2}I\omega \omega {\text{P}}$$
D $$I\omega \omega {\text{P}}$$
A circular disc rotates at n rpm. The angular velocity of a circular ring of same mass and radius as the disc and to have the same angular momentum is
A n rpm
B $$\frac{{\text{n}}}{2}$$ rpm
C $$\frac{{\text{n}}}{4}$$ rpm
D 2n rpm
Before I could stop him , the boy 'was throwing' the box down the stairs .
A were throwing
B threw
C did throw
D no improvement
Choose the right pair of words to complete the sentence: To get to the Economics Department, you have to go those stairs and then the corridor to the end.
A over/into
B between/into
C up/along
D over/along
Go ___ these stairs until you reach the top floor.
A upper
B through
C on
D in
Go -- these stairs until you reach the top floor.
A up
B through
C on
D in
At the Hardy house there was great consternation when Aunt Gertrude saw Joe helping Frank up the stairs.
A surprise
B panic
C gaity
D satisfaction

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