In pushing a heavy box across the floor, is the force you need to apply to start the box moving greater than, less than, or the
1 answer:
Answer:
Explanation:
Force needed to apply start the box is greater than the force needed to keep it moving because static friction is greater than the kinetic friction .
A threshold force is needed to move the box and when box started to move kinetic friction comes into play.
Friction force is directly related to the weight of the box as the friction force is
coefficient of friction time Normal reaction .
And Normal reaction is equal to the weight of box if no force is applied.
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Answer:
481.76 J/mol
133.33 K
Explanation:
= Avogadro's number =
Change in enthalpy is given by
Entropy is given by
Latent heat of fusion is given by
The latent heat of fusion is 481.76 J/mol
Melting point is given by
Melting occurs at 133.33 K
Explanation:
It is given that,
Voltage,
De broglie wavelength in terms of voltage is given by :
m and e are the mass and charge on electron. So,
So, the De broglie wavelength of an electron is 1.53 meters. Hence, this is the required solution.