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CBSE Class 11-science Answered

A girl swims in a100mt long pool. She covers 60m with velocity 20m/s and covers  the rest of distance with velocity 10m/s calculate  average velocity of girl 
Asked by Sudhanshu Shridhar | 30 May, 2015, 03:31: AM
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begin mathsize 12px style Total space distance space travelled space is space 100 space straight m. Time space taken space to space travel space the space to space travel space 60 space straight m space with space velocity space 20 space straight m divided by straight s straight t subscript 1 equals 60 over 20 equals 3 space straight s Time space taken space to space travel space the space to space travel space 40 space straight m space with space velocity space 10 space straight m divided by straight s straight t subscript 2 equals 40 over 20 equals 2 space straight s Average space velocity equals fraction numerator displacement over denominator straight t subscript 1 plus straight t subscript 2 end fraction equals fraction numerator 100 over denominator 3 plus 2 end fraction equals 50 space straight m divided by straight s The space average space velocity space of space girl space is space 50 space straight m divided by straight s end style
Answered by Priyanka Kumbhar | 01 Jun, 2015, 11:55: AM

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CBSE 11-science - Physics
an ideal gas is enclosed in a cylinder at pressure 2 atm and temperature 300k the mean time between two successive collisions is 6×10–⁸s if the pressure is doubled and temperature is increased to 500k the mean time between two successive collisions will be close to
Asked by ifrayaseen31 | 28 Oct, 2023, 09:26: AM
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CBSE 11-science - Physics
Dear experts, Kindly explain this question with a proper solution. Thank you.
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Asked by pratikshyadashrkl | 01 May, 2020, 10:24: AM
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CBSE 11-science - Physics
Derive allotropic constant in terms of degree of freedom and hence find it's value for monotonic diatomic and polyatomic gases . 4. Derive the expression for mean free path for a gas .
Asked by karanchandra34 | 29 Jan, 2019, 11:10: PM
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CBSE 11-science - Physics
Kinetic and calculus method
Asked by Madhurimaurya609 | 11 Jul, 2018, 08:14: PM
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CBSE 11-science - Physics
Does the average K.E per module of the gas depend upon the mass of the molecule?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
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CBSE 11-science - Physics
What do you mean by the number of degrees of freedom of a dynamical system?  How many degrees of freedom are associated with (i)  a bob of an oscillating simple pendulum (ii)  an insect moving on a horizontal floor (iii)  a buzzing bee (iv)  a particle moving in a plane  
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
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CBSE 11-science - Physics
State the factors on which mean free path (λ) of a gas molecule depends.
Asked by Topperlearning User | 11 May, 2015, 01:59: PM
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CBSE 11-science - Physics
What is meant by the term ' Molar specific heat ' of a gas?  The molar specific heat of hydrogen in the temperature range of about 250 K to 750 K is about (5/2) R.  At lower temperatures the value of molar specific heat of hydrogen decreases to the value typical of monoatomic gases (3/2) R while at higher temperatures, it tends to the value (7/2) R.  Explain.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
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CBSE 11-science - Physics
Find the average increase in kinetic energy of a molecule of gas per unit rise in temperature.
Asked by Topperlearning User | 11 May, 2015, 02:13: PM
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CBSE 11-science - Physics
(a)  How many degrees of freedom are there due to vibration motion of diatomic gas molecules? (b)  How many degrees of freedom are there for monoatomic, diatomic and triatomic gas due to translational and rotational motion only?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
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