Answer:
The answer to your question is: 12.48 s
Explanation:
Data:
initial speed (is) = 12 m/s
final speed (fs) = 13 m/s
distance (d) = 156 m
time (t) = ?
Formula
d = ((fs + is))/2 t we clear time from this equation t = 2d / (fs + is)
Substitution t = 2(156) / (13 + 12)
Process t = 312 / 25
t = 12.48 s
Answer:
The new fundamental frequency will be 598.7Hz.
Explanation:
The fundamental wavelength of the sound waves in the soda bottle is given by the equation
where 
is the speed of sound, and 
is the frequency. Since 
and 
, we have
Because it is a fundamental wavelength, the length 
of the soda can must be
The length of the soda bottle is 0.173 meters.
Now, if we pour 0.030 m of water, the new length of the air cavity becomes 
Therefore, the new fundamental wavelength will be
,
which is a frequency of
Thus, the new fundamental frequency is 598.7Hz.
Answer:
c) 6s
Explanation: take downwards as positive.
let vf = the velocity of the stone when it hits the ground, vi = 0 be the starting velocity of the stone. r0 = 175m be the height of the building.
(vf)^2 = (vi)^2 + 2g(r-r0)
(vf)^2 = 2g(r0)
vf = \sqrt{2g(r0)}
= \sqrt{2×9.8×(175)}
= 58.6 m/s
then:
vf = vi + g×t
vf = g×t
t = vf/g
= (58.6)/(9.8)
= 6s
Therefore, it will take the stone 6 seconds to reach the gound.
If they both have the same kinetic energy then they both have the same kinetic energy. otherwise it would be the bowling ball due to factors like weight
