Answer:
19.3 m/s
Explanation:
Considering that no initial velocity was imparted to the hamburger, then we can use the distance covered formula for motion under constant acceleration (that of gravity) and solve for the time it took to reach the ground.
D = vi * t + (1/2) a * t^2
in our case
19 = 0 + 4.9 t^2
t^2 = 19/4.9
then t is approximately 1.97 seconds
We now use this time information in the equation for velocity under accelerated motion (due to gravity)
Vf = Vi + g * t
For our case:
Vf = 0 + 9.8 * 1.97 = 19.3 m/s
A person that is standing behind a moving siren will interpret the frequency to be lower compared to the person that would be standing in front of it. This is because the sound is now moving away from the person behind the siren and at this point the sound is juts lingering but, still very low.
Answer:
Conditions under which the belt and pulleys are operating – The friction between the belt and pulley may decrease substantially if the belt happens to be muddy or wet, as it may act as a lubricant between the surfaces.
Explanation:
I hope that this would be helpful
Answer:
0.962 s
Explanation:
Speed = frequency × wavelength
v = fλ
2.60 m/s = f (2.50 m)
f = 1.04 Hz
Period = 1 / frequency
T = 1/f
T = 1 / (1.04 Hz)
T = 0.962 s
To solve this problem it is necessary to apply an energy balance equation in each of the states to assess what their respective relationship is.
By definition the energy balance is simply given by the change between the two states:
Our states are given by
In this way the energy balance for the states would be given by,
Therefore the states of energy would be
Lowest : 0.9eV
Middle :7.5eV
Highest: 8.4eV
