What happens to kinetic energy of a snowball as it rolls across the lawn and gains mass

Physics

2 answers:

leva [86]3 years ago

7 0

If you are not considering friction, the energy must be the same, therefore, kinetic energy will be constant.

Naya [18.7K]3 years ago

3 0

If an object whose mass is growing keeps the same, unchanged
kinetic energy, then its motion must slow down, because

Kinetic Energy = (1/2) (mass) (speed)² .

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Consider the following reaction proceeding at 298.15 K: Cu(s)+2Ag+(aq,0.15 M)⟶Cu2+(aq, 1.14 M)+2Ag(s) If the standard reduction

lutik1710 [3]

Answer : The cell potential for this cell 0.434 V

Solution :

The balanced cell reaction will be,

$Cu(s)+2Ag^{+}(aq)\rightarrow Cu^{2+}(aq)+2Ag(s)$

Here copper (Cu) undergoes oxidation by loss of electrons, thus act as anode. silver (Ag) undergoes reduction by gain of electrons and thus act as cathode.

First we have to calculate the standard electrode potential of the cell.

$E^o_{[Cu^{2+}/Cu]}=0.34V$