Back

64. What is the velocity v of a metallic ball of radius r falling in a tank of liquid at the instant when its acceleration is one-half that of a freely falling body ?

(The densities of metal  and of liquid are ρ and  σ respectively, and the viscosity of the liquid is η).

(a) [(r2g)/(9η)][ ρ -2σ]                         (b) [(r2g)/(9η)][ 2ρ -σ]

(c)  [(r2g)/(9η)][ ρ -σ]                          (d) [(2r2g)/(9η)][ ρ -σ]

Answer-c

 

(52)

Rate this post

Related Posts:

Powered by Contextual Related Posts

Shilpa

You may also like

12. An ideal gas is taken through the cycle A→ B → C → A, as shown in the figure. If the net heat supplied to the gas in the cycle is 5 J, the work done by the gas in the process C → A is
05/09/2022

(a)      – 5 J (b)  – 10 J (c)   – 15 J (d)  – 20 J Answer-a (118)

11. The P-V diagram of a system undergoing thermodynamic transformation is shown in figure. The work done on the system in going from A → B → C is 50 J and 20 cal heat is given to the system. The change in internal energy between A and C is
05/09/2022

(a)      34 J (b)  70 J (c)   84 J (d)  134 J Answer-d (202)

error: Content is protected !!