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Dimension and units of w..



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Q1. One nanometer is equal to

(a) 10-6 m
(b) 10-8 m
(c) 10-9 m
(d) 10-5 m

Q2. What is the unit for measuring the amplitude of a sound?

(a) Decibel
(b) Coulomb
(c) Hum
(d) Cycles

Q3. Square root of the ratio of inertia force to elastic force is called as

(a) Machs Number
(b) Cauchys Number
(c) Both a. and b
(d) None of the above

Q4. Which of the following number is applicable in open hydraulic structure such as spillways, where gravitational force is predominant?

(a) Reynolds Number
(b) Eulers Number
(c) Webers Number
(d) Froudes Number

Q5. Which of the following is a dimensionless equation?

(a) Reynolds equation
(b) Eulers equation
(c) Webers equation
(d) All of the above

Q6. Which of the following equations is not dimensionally homogeneous? Consider standard symbols for quantities.

(a) (Force) F = m x a
(b) (Head Loss due to friction) hf = (f L V2) / (2 g d)
(c) (Torque) T = F x Distance
(d) None of the above

Q7. Which of the following quantities has the dimensions [M0 L0 T 0]

(a) Density
(b) Stress
(c) Strain
(d) Strain Rate

Q8. What are the dimensions of force?

(a) [M L T – 2 ]
(b) [M L T – 1 ]
(c) [M L 2 T – 2 ]
(d) [M L 2 T 2 ]

Q9. Which of the following is not a primary quantity?

(a) Mass (M)
(b) Temperature (?)
(c) Time (T)
(d) None of the above

Q10. The unit of physical quantity which does not depend on the unit of any other physical quantity is called as

(a) independent dimension
(b) fundamental dimension
(c) core dimension
(d) none of the above


15 votes
2 Answer
715 views

A Mass Of M Kg Is Suspended By A Weightless String. The Horizontal Force That Is Required To Displace It Until The String Makes An Angle Of 45° With The Initial Vertical Direction Is

Modified 13 Year Ago

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13 Year Ago

A Mass Of M Kg Is Suspended By A Weightless String. The Horizontal Force That Is Required To Displace It Until The String Makes An Angle Of 45° With The Initial Vertical Direction Is

15 votes
2 Answer
677 views

A Ball Is Dropped From Height 20 M. If Coefficient Of Restitution Is 0.9 What Will Be The Height Attained After First Bounce?

Modified 13 Year Ago

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677
13 Year Ago

A Ball Is Dropped From Height 20 M. If Coefficient Of Restitution Is 0.9 What Will Be The Height Attained After First Bounce?

15 votes
2 Answer
501 views

A 50kg Man With 20kg Load On His Head Climbs Up 20 Steps Of 0.25m Height Each

Modified 200 Year Ago

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200 Year Ago

A 50kg Man With 20kg Load On His Head Climbs Up 20 Steps Of 0.25m Height Each

15 votes
2 Answer
497 views

A Particle Of Mass 100g Thrown Vertically Upwards With A Speed Of 5m/s.

Modified 230 Year Ago

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497
230 Year Ago

A Particle Of Mass 100g Thrown Vertically Upwards With A Speed Of 5m/s.

15 votes
2 Answer
470 views

If Force And Displacement Of Particle In Direction Force Are Doubled.Work Would Be

Modified 230 Year Ago

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470
230 Year Ago

If Force And Displacement Of Particle In Direction Force Are Doubled.Work Would Be

15 votes
2 Answer
434 views

A Body Of Mass 5 Kg Is Placed At The Origin, And Can Move Only On The X-axis. The Work Done By The Force Is

Modified 230 Year Ago

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434
230 Year Ago

A Body Of Mass 5 Kg Is Placed At The Origin, And Can Move Only On The X-axis. The Work Done By The Force Is

15 votes
2 Answer
424 views

A Body Moves A Distance Of 10m Along A Straight Line Under The Action Of A Force Of 5 N.

Modified 230 Year Ago

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424
230 Year Ago

A Body Moves A Distance Of 10m Along A Straight Line Under The Action Of A Force Of 5 N.

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