If you run up the stairs (and don't fall) which of the following would be true?
2 answers:
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Explanation:
we first find acceleration by
V=u +at (v is the final velocity,u the initial velocity,a the acceleration and t the time taken)
v=25 m/s
u=0
t=3.6s
substituting we get
25=0 + a (3.6)
25=3.6a (diving both sides by 3.6 we get)
a=6.94 m/s^2
to find distance we use the equation v^2=u^2 + 2ad
25^2 =0^2 + 2 (6.94)do
625=13.88d (dividing both sides by 13.88 we get );
d=45m
Answer:
130.2dB
Explanation:
The formula for determining the intensity of a wave is expressed as
Where P is the power in watts, and A is the area of the sphere formed by the wave
Data given
Power,P=3.65*10^5W
distance,d=52.7
Hence since the distance represent the radius, we can determine the area of the sphere formed
The intensity can be computed as
we can convert to decibel