Answer : The standard potential for the given cell is 0.9 V
Explanation :
The standard reduction potentials for zinc and copper are:
The substance having highest positive 
potential will always get reduced and will undergo reduction reaction.
Here, cobalt will undergo reduction reaction will get reduced. Manganese will undergo oxidation reaction and will get oxidized.
Oxidation half reaction: 
Reduction half reaction: 
Oxidation reaction occurs at anode and reduction reaction occurs at cathode.
To calculate the 
of the reaction, we use the equation:
Putting values in above equation, we get:
Hence, the standard potential for the given cell is 0.9 V
56.25J because the formula for kinetic energy is Ek=1/2 x mass x velocity^2
Ek= 1/2 x 0.5 x 15^2
= 56.25J
Answer:
measurements that would be most effective to help you determine the angular momentum of the system are
the mass of the rock, the length of the lever on both sides of the fulcrum, and the force applied on the right side of the lever
Answer:
Earth's rotation and orbit and the Moon's orbit cause observable patterns (Day and night, seasons, phases of the Moon, tides).
Answer:
The displacement of Sudhir is 0.781 km.
Explanation:
Given;
initial distance, d₁ = 0.4 km = 400 m, N60.0°W
final distance, d₂ = 0.5 km
Make a sketch of Sudhir motion to form a right angled triangle;
(Check image uploaded).
Apply cosine rule to determine d "displacement"
d² = 500² + 400² - (2 x 500 x 400 x cos 120)
d² = 410,000 - (400,000 x -0.5)
d² = 410,000 - (-200,000)
d² = 410,000 + 200,000
d² = 610,000
d = √610000
d = 781.03 m
d = 0.781 km
Therefore, the displacement of Sudhir is 0.781 km.
