Angelina jumps off a stool. As she is falling, the Earth’s gravitational force on her is larger in magnitude than the gravitatio
2 answers:
Answer:
1. False
Explanation:
As per law of gravitational attraction force we know that
where we know that
= masses of two point mass
= distance between two masses
so here we know that as the force does not depend on individual mass but it will depend on the product of two masses
so here the gravitational force is same in magnitude on both the bodies
so when Angelina jumps off the stool the gravitational force on Earth and on Angelina must be of same magnitude
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Answer:
I)
II)The difference from the value obtained on part I is: 2000-1385.67 =614.33
The possible reason of this difference is that the vibrational motion can increase the value, since if we take in count this factor we will have a higher heat capacity, because molecules with vibrational motion require more heat to vibrate and necessary higher specific heat capacity.
Explanation:
From the problem we have the molar mass given of water vapor and at constant volume condition. It's important to say that the vapour molecules have 3 transitionsl and 3 rotational degrees of freedom and the rotational motion no contribution.
Part I
Calculate the specific heat at constant volume of water vapor, assuming the nonlinear triatomic molecule has three translational and three rotational degrees of freedom and that vibrational motion does not contribute. The molar mass of water is 18.0 g/mol=0.018kg/mol.
Let the molar heat capacity at constant volume and this amount represent the quantity of heat absorbed by mole.
Let the specific heat capcity this value represent the heat capacity aboserbed by mass.
For the problem we have a total of 6 degrees of freedom and from the thoery we know that for each degree of freedom the molar heat capacity at constant volume is given by so the total for the 6 degrees of freedom would be:
And by definition we know that the specific heat capacity is defined:
If we replace all the values we have:
So on this case the specific heat capacity with constant volume and with three translational and three rotational degrees of freedom is
Part II
The actual specific heat of water vapor at low pressures is about 2000 J/(kg * K). Compare this with your calculation.
The difference from the value obtained on part I is: 2000-1385.67 =614.33
The possible reason of this difference is that the vibrational motion can increase the value, since if we take in count this factor we will have a higher heat capacity, because molecules with vibrational motion require more heat to vibrate and necessary higher specific heat capacity.