Answer:
1.74 × 10^-3 m ( 1.74 mm)
Explanation:
Using Torricelli"s equation to calculate the speed of water at the surface of the hole and assuming that the speed of water at the surface of the tank is zero
v ( speed of water at the surface of the hole) = √ 2g(h1 - h2) where h1 - h2 is the difference in height which 16 m
v = √ 2×9.81×16 = 17.72 m/s
work done in ( m³/s) = 2.5 × 10^ -3 / 60 seconds = 4.2 × 10^-5 m³/s
work done = A × v
4.2 × 10^-5 = A × 17.72
4.2 × 10^-5 / 17.72 = A
2.37 × 10^-6 = A where A is assumed a circle ( πr²)
r = 2.37 × 10^-6 / π = √2.37 × 10^-6 / 3.142 = 0.869 × 10 ^ -3
diameter = 2r = 2 × 0.869 × 10^-7 = 1.74 × 10^-3 m
Answer:
0.76m
Explanation:
Given data
Frequency= 230Hz
speed= 350m/s
Since we are told that the frequency is the fundamental frequency n= 1
For a standing wave
Fn= nv/2L
n= 1
230= 1*350/2*L
230= 350/2L
cross multiply
2L= 350/230
2L=1.521
L=1.521/2
L=0.76m
Hence the length is 0.76m
Answer:
#See solution for details.
Explanation:
Newton's Second law of motion states that :- the rate of change of momentum is directly proportional to the force applied on an object or system..
The force applied on an object of mass m is directly proportional to the product of mass and acceleration:
![F=ma](https://tex.z-dn.net/?f=F%3Dma)
-Let
be the initial momentum and
be the final momentum.
![p_2-\frac{p_1}{t}\propto F](https://tex.z-dn.net/?f=p_2-%5Cfrac%7Bp_1%7D%7Bt%7D%5Cpropto%20F)
#also let
be the initial velocity and
the final.
Momentum,
:
![P=mv](https://tex.z-dn.net/?f=P%3Dmv)
![mv-\frac{mu}{t}\propto F\\\\F\propto \frac{m(v-u)}{t}\\\\F\propto ma\\\\F=kma](https://tex.z-dn.net/?f=mv-%5Cfrac%7Bmu%7D%7Bt%7D%5Cpropto%20F%5C%5C%5C%5CF%5Cpropto%20%5Cfrac%7Bm%28v-u%29%7D%7Bt%7D%5C%5C%5C%5CF%5Cpropto%20ma%5C%5C%5C%5CF%3Dkma)
#where k is the constant of proportionality. Given the direct proportion, k=1.
#The unit is in kgm/s but usually equated to N, 1kgm/s=1N
We need to directly measure the spectral type in order to determine the surface temperature of a star.
<h3>How do you find the properties of a star?</h3>
Astronomers can determine the temperature of a star by looking at its color and spectrum. The apparent brightness of a star describes how luminous it looks to us. The brightness of a star tells us how bright it really is. The luminance can be determined using both the perceived brightness and the distance.
A star's luminosity, or the total amount of energy it emits each second, is determined by two factors: The stellar photosphere's "Effective Temperature," T. the star's total surface area, which is influenced by its radius, R.
Because it controls how much fuel a star has and how quickly it burns it, a star's mass is its most fundamental characteristic. The majority of a star's life is spent burning hydrogen into helium in its core, which generates energy. The star needs to achieve a balance between gravity and outward pressure in order to continue to be "alive."
To know more about stellar property visit:
brainly.com/question/14950677
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