A
Increased metabolic rate due to exercise is helpful because the body uses more calories for everyday activities
Explanation:
There is usually an increased demand for energy in the body with increased physical exercise. Therefore for the body to meet the energy demands, the metabolic rate of the body increases as it burns more glucose to produce more ATPs. More oxygen is required to efficiently produce many ATPs in the mitochondria which is why we pant when doing extraneous physical exercises.
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Answer:
Force, F = 900 N
Explanation:
Given that,
Mass of the football, m = 0.55 kg
Initial speed of the ball, u = 0
Final speed, v = 54 m/s
Time of contact, t = 0.033 s
We need to find the magnitude of the force exerted by the ball on the kicker’s foot. It is a case of second law of motion. It is equal to the rate of change of momentum. So,
So, the magnitude of the force exerted by the ball on the kicker’s foot is 900 N.
It's equal to d external atmospheric pressure
Answer:
Explanation:
Given:
Final force between them=17(initial force between them)
initial separation between them 
Final separation between them 
Let Q and q be the charges on them then
Answer:
6logs
Explanation:f
First finding the volume of the logs
V= π/4d²l
= 0.098m³
So number of logs will be
Weight of 2 boys + weight of log = buoyancy force.
So
2( 400)+ N ( Mlog x g) = density of water x volume displaced x g
2(400) = N x 0.098x 1000x 9.8 x 0.9- 0.75* 1000
N= 5.5 which is approx 6logs
