Happygirl5715
20.01.2022 •
Physics
Bartholomew Sr. got a 63.2-kg box of cooking supplies shipped to him, and is about to push itnorth into his kitchen.
But Bart Jr., age 5, sees “cooki” and thinks it’s a huge box of cookies which he wants to pushwest into his play room.
Sr. starts pushing with force 120 N and Jr. starts pushing with a force of 40 N at the same time.
Bart Sr. just waxed the floor, so ignore friction. Show all work.
1. What direction will the box go? Use graphical vector addition.
2. What will be the magnitude of its acceleration?
3. What will be the velocity of the box after 3 seconds of pushing?
4. What distance will the box have gone in those 3 seconds?
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Ответ:
0.52 V
Explanation:
From Nernst equation;
Ecell =E°cell - 0.0592/n log Q
E°cell = +0.63 V
[Zn2+] =1.0 M
[Pb2+] = 2.0 x 10-4 M
n = 2
Ecell = 0.63 - 0.0592/2 log[1.0/2.0 x 10-4]
Ecell = 0.63 - 0.11
Ecell = 0.52 V