Physics

# If the radius of earth were to shrink by one percent and mass remains same, then acceleration due to gravity on the surface of the earth would

Decrease by 2%

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Single Correct Medium Published on 18th 08, 2020
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Subjects 8
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#### Realted Questions

Q1 Subjective Medium
July 17, 1981, Kansas City: The newly opened Hyatt Regency is packed with people listening and dancing to a band playing favorites from the 1940s. Many of the people are crowded onto the walkways that hang like bridges across the wide atrium. Suddenly two of the walkways collapse, falling onto the merrymakers on the main floor.
The walkways were suspended one above another on vertical rods and held in place by nuts threaded onto the rods.In the original design, only two long rods were to be used, each extending through all three walkways (Fig.). If each walkway and the merrymakers on it have a combined mass of M, what is the total mass supported by the threads and two nuts on (a) the lowest walkway and (b) the highest walkway?
Apparently someone responsible for the actual construction realized that threading nuts on a rod is impossible except at the ends,so the design was changed:Instead,six rods were used,each connecting two walkways (Fig.5-24b).What now is the total mass supported by the threads and two nuts on (c) the lowest walkway, (d) the upper side of the highest walkway,and (e) the lower side of the highest walkway? It was this design that failed on that tragic night-a simple engineering error.

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q2 Matrix Medium
If R is resistance, L is inductance, C is capacitance, H is latent heat, and s is specific heat, then match the quantity given in column I with the dimensions given in Column II
 $LC$ $L^2 T^{-2}$ $LR$ $L^2 T^{-2} K^{-1}$ $H$ $T^2$ $s$ $M^2 L^4 T^{-5} A^{-4}$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q3 Single Correct Medium
If the units of velocity of light '$C$', Gravitational constant '$G$' and Planck's Constant '$h$' are taken as fundamental units, the dimensional formula for Mass in the new system will be :
• A. $[ C^1 G^1 h^1 ]$
• B. $\left[ { C }^{ \frac { 1 }{ 2 } }{ G }^{ \frac { 1 }{ 2 } }{ h }^{ \frac { 1 }{ 2 } } \right]$
• C. $\left[ { C }^{ \frac { 1 }{ 2 } }{ G }^{ -\frac { 1 }{ 2 } }{ h }^{ \frac { 1 }{ 2 } } \right]$
• D. $\left[ { C }^{ 2 }{ G }^{ 2 }h^{ 2 } \right]$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q4 Single Correct Medium
The length, breadth and thickness of a block are measured with the help of a meter scale. given   $\ell$ =(5.12 + 0.01)cm, b =(10.15 +0.01)cm, t=(5.28+0.01)cm. The percentage error in volume is:
• A. 0.64%
• B. 0.28%
• C. 0.37%
• D. 0.48%

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q5 Single Correct Medium
Measuring vessel to measure volume of irregular shaped solid is ....................... .
• A. Measuring Jar
• B. measuring bowl
• C. Any of these can be used
• D. None

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020