and closing
.
The heart has 4 valves. They are what makes the lub-dub lub-dub sounds that can be heard from the chest.
The mitral valve is located between the left atrium and the left ventricle. It closes the left atrium to collect oxygenated blood from the lungs and opens to pass it on to the left ventricle.
The tricuspid valve is located between the right atrium and the right ventricle. It closes the right atrium to hold unoxygenated blood and opens to pass it on to the right ventricle ensuring a one way flow.
The aortic valve is located between the aorta and the left ventricle. It closes the left ventricle and opens to the aorta to pass on the oxygen-rich blood to the body.
The pulmonary valve is located between the pulmonary artery and the right ventricle. It closes off the right ventricle and opens to pass on unoxygenated blood to the lungs.
Answer:
mass of the fish is 8.11 kg
Explanation:
As we know that the frequency of oscillation of spring block system is given as
![f = \frac{1}{2\pi}\sqrt{\frac{k}{m}}](https://tex.z-dn.net/?f=f%20%3D%20%5Cfrac%7B1%7D%7B2%5Cpi%7D%5Csqrt%7B%5Cfrac%7Bk%7D%7Bm%7D%7D)
here we know that the reading of scale varies from 0 to 155 N from length varies from x = 0 to x = 10 cm
Now we have
![k = \frac{155}{0.10} N/m](https://tex.z-dn.net/?f=k%20%3D%20%5Cfrac%7B155%7D%7B0.10%7D%20N%2Fm)
![k = 1550 N/m](https://tex.z-dn.net/?f=k%20%3D%201550%20N%2Fm)
so now we have
![2.20 = \frac{1}{2\pi}\sqrt{\frac{1550}{m}}](https://tex.z-dn.net/?f=2.20%20%3D%20%5Cfrac%7B1%7D%7B2%5Cpi%7D%5Csqrt%7B%5Cfrac%7B1550%7D%7Bm%7D%7D)
![m = 8.11 kg](https://tex.z-dn.net/?f=m%20%3D%208.11%20kg)
so mass of the fish is 8.11 kg
What are the following statements? If there's one that mention a description of current action, or motion, that's your answer.
<span>Contemporary skepticism (or scepticism) is loosely used to denote any questioning attitude,[1] or some degree of doubt regarding claims that are elsewhere taken for granted.[2] Usually meaning those who follow the evidence, [ [ versus those who are skeptical of the evidence (see:Denier) Skepticism is most controversial when it questions beliefs that are taken for granted by most of the
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a) 32.3 N
The force of gravity (also called weight) on an object is given by
W = mg
where
m is the mass of the object
g is the acceleration of gravity
For the ball in the problem,
m = 3.3 kg
g = 9.8 m/s^2
Substituting, we find the force of gravity on the ball:
![W=(3.3)(9.8)=32.3 N](https://tex.z-dn.net/?f=W%3D%283.3%29%289.8%29%3D32.3%20N)
b) 48.3 N
The force applied
![F_{app} = 36 N](https://tex.z-dn.net/?f=F_%7Bapp%7D%20%3D%2036%20N)
The ball is kicked with this force, so we can assume that the kick is horizontal.
This means that the applied force and the weight are perpendicular to each other. Therefore, we can find the net force by using Pythagorean's theorem:
![F=\sqrt{W^2+F_{app}^2}](https://tex.z-dn.net/?f=F%3D%5Csqrt%7BW%5E2%2BF_%7Bapp%7D%5E2%7D)
And substituting
W = 32.3 N
Fapp = 36 N
We find
![F=\sqrt{32.3^2+36^2}=48.3 N](https://tex.z-dn.net/?f=F%3D%5Csqrt%7B32.3%5E2%2B36%5E2%7D%3D48.3%20N)
c) ![14.6 m/s^2](https://tex.z-dn.net/?f=14.6%20m%2Fs%5E2)
The ball's acceleration can be found by using Newton's second law, which states that
F = ma
where
F is the net force on an object
m is its mass
a is its acceleration
For the ball in this problem,
m = 3.3 kg
F = 48.3 N
Solving the equation for a, we find
![a=\frac{F}{m}=\frac{48.3}{3.3}=14.6 m/s^2](https://tex.z-dn.net/?f=a%3D%5Cfrac%7BF%7D%7Bm%7D%3D%5Cfrac%7B48.3%7D%7B3.3%7D%3D14.6%20m%2Fs%5E2)