Answer:
Power required, P = 175 watts
Explanation:
It is given that,
Weight of a student, F = mg = 200 N
The student climbs a flight of stairs of height, h = 7 m
Time taken, t = 8 s
We have to find the power required to perform this task. Work done per unit time is called the power required. Mathematically, it is given by :
W = work done
t = time taken
P = 175 watts
Hence, the power required to complete this task is 175 watts.
Answer:
wavelength = 0.8989 m
Explanation:
Given data:
weight of wire is 8.25 g
length of wire is 65 cm
speed of sound in room is 344 m/s
time of returning of pulse is 7.84 ms
There are three time period
Time period 
velocity = wavelength × frequency
wavelength 
wavelength = 0.8989 m
The answer would be 21.6 but rounded up it would be 22J.
Answer: Atmosphere and geosphere.
Geo-sphere is the solid part of the earth. Hydrosphere is the water part. The living things on the earth make up the biosphere. The gases, water vapors etc make up the atmosphere. When a volcanic eruption adds carbon dioxide to the air, the carbon-dioxide is being added from geosphere to the atmosphere. Hence, there is interaction between atmosphere and geosphere.
Answer:
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