Sally started at the starting point.
She walked 10m forward. So far, she walked 10m, and she was 10m from the starting point.
Then she walked 5m backward. So far, she walked 15m, but she was only 5m from the starting point.
The distance she walked was 15m. But her displacement is how far she is from the starting point ... that's only 5m
Displacement = 5 meters
Distance = 15 meters
Displacement is 10m less than distance walked. <em>(B)</em>
===> If she kept going and walked <u><em>another </em></u>5m backward, she would be back where she started. The total distance she walked would be 20m, and her displacement would be zero !
The law of conservation of mass states that mass can be destroyed during a chemical change is TRUE
The force require to keep grouper submerged is 8.207N.
According to Archimedes principle buoyant force of any object must equal to weight of fluid it displaced.
The expression for the force exerted to stay submerged in salt water is
F = F(b) - w(fish)
where F(b) = buoyant force
w(fish) = weight
now substitute w(b) for F(b)
→ F = Vρg - w(fish)
where V = volume of sea water
ρ = density of sea water
Now by Archimedes principle V = m(fish) / ρ(fish)
→ F = (m(fish) / ρ (fish) ) ρg - m(fish)g
F = (85 kg/1015 kg-m^-3) (1.025× 10³ kg-m^-3) (9.8 m/s^2)
- (85kg) × 9.8 m/s^2
F = 841.207N - 833N
F = 8.207 N
Hence, the force require to keep grouper submerged is 8.207N.
Learn more about Archimedes Principle here:
brainly.com/question/15076878
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A constant velocity implies the two forces must be equal and opposite.
Friction acts horizontal to the ground, therefore we must find the force applied to the sled rope that acts horizontal to the ground.
Do this by resolving:
Force = 80cos53
The force opposing this is equal, and so also = 80cos53 = 48 N (2 sig. fig.)
