Answer:
the kinetic energy lost due to friction is 22.5 J
Explanation:
Given;
mass of the block, m = 0.2 kg
initial velocity of the block, u = 25 m/s
final velocity of the block, v = 20 m/s
The kinetic energy lost due to friction is calculated as;
Therefore, the kinetic energy lost due to friction is 22.5 J
Answer:
Acceleration due to gravity on Mars = 3.72 m/s²
Explanation:
It is given that the grandfather clock on Mars lags 23 minutes behind the grandfather clock on Earth after 1 hour.
Mars = 60 - 23 = 37 minutes
So the time on Mars is 37 minutes when time on Earth is 60 minutes.
We know that time period on Earth is given by
Te = 2π√(L/ge)
Where ge is acceleration due to gravity on the Earth
We know that time period on Mars is given by
Tm = 2π√(L/gm)
Where gm is acceleration due to gravity on the Mars
So,
Te/Tm = 37/60 = 0.616
0.616 = 2π√(L/ge)/2π√(L/gm)
Simplifying the above equation yields
0.616 = √gm/√ge
√gm = √ge*0.616
squaring on both sides
gm = ge*0.616²
The acceleration on the Earth is 9.81 m/s²
gm = 9.81*0.616²
gm = 3.72 m/s²
Therefore, the acceleration due to gravity on Mars is 3.72 m/s².
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Hoped it helped!! </span>
The answer to the given question above is letter "D. spectator ions". The net ionic equation is the total ionic equation with the spectator ions removed. The spectator ions are the ions that appear in both sides of the balanced chemical reaction. This means that the spectator ions are not affected by the reaction.
