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Elis [28]
2 years ago
9

The magnitude of a force acting on an object is equal to the amount of change in momentum divide by ?

Physics
1 answer:
Evgesh-ka [11]2 years ago
6 0

Answer:

time taken.

Explanation:

F = ma

F = m × (v - u) / t

F = mv - mu / t

mv - mu = change in momentum

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The human ear canal is about 2.8 cm long. If it is regarded as a tube that is open at one end and closed at the eardrum, what is
Diano4ka-milaya [45]

Answer:

f = 3.1 kHz

Explanation:

given,

length of human canal =2.8 cm = 0.028 m

speed of sound = 343 m/s

fundamental frequency  = ?

The fundamental frequency of a tube with one open end and one closed end is,

f = \dfrac{v}{4L}

f = \dfrac{343}{4\times 0.028}

f = \dfrac{343}{0.112}

       f = 3062.5 Hz

       f = 3.1 kHz

hence, the fundamental frequency is equal to f = 3.1 kHz

8 0
3 years ago
A star is held together by:gravitynuclear fissionnuclear fusionacceleration
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6 0
3 years ago
How do you determine the wattage capacity needed by a power supply?
Lady bird [3.3K]
We could use the formula for the Power supply in order to find the wattage capacity and it would be:

P = V²/R or P = V * I

Hope this helps!
6 0
3 years ago
Superman attempts to drink water through a very long vertical straw. With his great strength, he achieves maximum possible sucti
Stells [14]

Answer:

10.32874 m

Explanation:

P_a = Atmospheric pressure = 101325 Pa

g = Acceleration due to gravity = 9.81 m/s²

h = Height of water

\rho = Density of water = 1000 kg/m³

If the walls of the tube do not collapse that means that maximum pressure inside will be the atmospheric pressure

Atmospheric pressure is given by

P_a=\rho gh\\\Rightarrow h=\dfrac{P_a}{\rho g}\\\Rightarrow h=\dfrac{101325}{1000\times 9.81}\\\Rightarrow h=10.32874\ m

The maximum height to which Superman can lift the water is 10.32874 m

On the Moon there is no atmosphere so no atmospheric pressure which means when the straw is placed in water water will not rise in the tube.

5 0
3 years ago
Explain how the thermal energy of a swimming pool compares to the thermal energy of a lake at the same temperature.
astra-53 [7]
There is more thermal energy in the lake because there is more water which is more thermal energy
3 0
3 years ago
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