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An artificial satellite is revolving around a planet of mass M and radius R, in a circular orbit of radius r. From Kepler’s Third law about the period of a satellite around a common central body, square of the period of revolution T is proportional to the cube of the radius of the orbit r. Show using dimensional analysis, that `T=k/Rsqrt(r^3/g)`, where k is a dimensionless constant and g is acceleration due to

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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In an experiment to estimate the size of a molecule of oleic acid 1 mL of oleic acid is dissolved in 19 mL of alcohol. Then 1 mL of this solution is diluted to 20 mL by adding alcohol. Now 1 drop of this diluted solution is placed on water in a shallow trough. The solution spreads over the surface of water forming one molecule thick layer. Now, lycopodium powder is sprinkled evenly over the film and its diameter is measured. Knowing the volume of the drop and area of the film we can calculate the thickness of the film

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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In an experiment to estimate the size of a molecule of oleic acid 1 mL of oleic acid is dissolved in 19 mL of alcohol. Then 1 mL of this solution is diluted to 20 mL by adding alcohol. Now 1 drop of this diluted solution is placed on water in a shallow trough. The solution spreads over the surface of water forming one molecule thick layer. Now, lycopodium powder is sprinkled evenly over the film and its diameter is measured. Knowing the volume of the drop and area of the film we can calculate the thickness of the film

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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How many astronomical units (A.U.) make 1 parsec? Show

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Consider a sunlike star at a distance of 2 parsecs. When it is seen through a telescope with 100 magnification, what should be the angular size of the star? Sun appears to be (1/2)° from the earth. Due to atmospheric fluctuations, eye can’t resolve objects smaller than 1

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Mars has approximately half of the earth’s diameter. When it is closest to the earth it is at about 1/2 A.U. from the earth. Calculate what size it will appear when seen through the same telescope. (Comment : This is to illustrate why a telescope can magnify planets but

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Einstein’s mass - energy relation emerging out of his famous theory of relativity relates mass (m ) to energy (E ) as E = mc 2, where c is speed of light in vacuum. At the nuclear level, the magnitudes of energy are very small. The energy at nuclear level is usually measured in MeV, where 1 MeV= 1.6×10–13 J; the masses are measured in unified atomic mass unit (u) where 1u = 1.67 × 10–27 kg.

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Einstein’s mass - energy relation emerging out of his famous theory of relativity relates mass (m ) to energy (E ) as E = mc 2, where c is speed of light in vacuum. At the nuclear level, the magnitudes of energy are very small. The energy at nuclear level is usually measured in MeV, where 1 MeV= 1.6×10–13 J; the masses are measured in unified atomic mass unit (u) where 1u = 1.67 × 10–27 kg.

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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What is periodic motion

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What is oscillatory motion ? Give one

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What is

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The girl sitting on a swing stands up. What will be the effect on periodic time of

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At what distance from the mean position, is the kinetic energy in a simple harmonic oscillator equal to potential

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A simple harmonic oscillator is represented by the equation : Y = 0.40 Sin (440t+0.61) Y is in metres t is in seconds Find the values of 1) Amplitude 2) Angular frequency 3) Frequency of oscillation 4) Time period of oscillation, 5) Initial

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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The soldiers marching on a suspended bridge are advised to go out of steps.

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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The springs of spring factor k, 2k, k respectively are connected in parallel to a mass m. If the mass = 0.08kg m and k = 2N|m, then find the new time

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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The bob of a vibrating simple pendulum is made of ice. How will the period of swing will change when the ice starts

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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An 8 kg body performs S.H.M. of amplitude 30 cm. The restoring force is 60N, when the displacement is 30cm. Find: - a) Time period b) the acceleration c) potential and kinetic energy when the displacement is

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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What is Simple pendulum? Find an expression for the time period and frequency of a simple

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A particle executing SH.M has a maximum displacement of 4 cm and its acceleration at a distance of 1 cm from its mean position is 3 cm/`s^2`. What will be its velocity when it is at a distance of 2cm from its mean

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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