Answer:
Explanation:
Here the steady speed of the river water relative to ground is
Speed of the boy relative to still water is
Here we are considering +ve speed along along +ve x-axis and -ve speed along -ve x-axis
Therefore the speed of boy relative to the ground upstream is:
And the speed of boy relative to the ground downstream is:
The distance covered in upstream trip d₁=1.0km=1000m and the distance covered in downstream is d₂=1.0km=1000m
Since time taken by a person is to cover distance d with speed v given by:
The total time taken for one trip is:
Answer:
two places where thermal conduction takes place are gases and liquids, conduction is due to collisions of molecules during their random motion. Hence, the correct option is (C). Note: Though, the particle distances between gases are much more in comparison to solids and liquids, conduction slowly occurs in gases also
Explanation:
i hope it will help you
This is True, cars with the same velocity must have the exact same speed.
Answer:
4000 J
Explanation:
W = F = 2000N , s = 20 m
Workdone = F × s = 200 × 20 = 4000J
The charge going to the clothes iron needs to be grounded so the iron does not make any shock
