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Ray Of Light [21]
3 years ago
11

PLEASE HELP ME, I NEED THIS DONE AS SOON AS POSSIBLE.

Physics
1 answer:
forsale [732]3 years ago
3 0
Musculoskeletal

You use your musculoskeletal system extensively during exercise. Muscle fibers contract to shorten muscles in such a way that pivots bones around joints, resulting in the swinging arms and running legs of exercise. When you exercise, your muscles need more oxygen-rich blood and glucose. Your body must shift resources away from some body systems to meet this demand.

Nervous

Your nervous system plays an important role in exercise, predicting the level of activity and then routing resources to those body systems used during exercise. Your central nervous system increases your heart rate early on in exercise. Your nervous system also signals your muscles to take up more oxygen from the bloodstream, known as oxygen uptake.

Heart

Your cardiovascular system includes your blood vessels and your heart, which pumps blood to the rest of your body through those blood vessels. Cardiac output is the amount of blood your heart pumps. According an article published in Clinics in Sports Medicine, the typical person at rest has a cardiac output of five to six liters per minute. Your cardiac output must satisfy the metabolic needs of the body during exercise by providing the body with the oxygen-rich blood it needs to perform the physical activity. Your heart rises to the challenge by increasing the force at which it pushes blood through your blood vessels. Stroke volume, or the amount of blood pumped by one portion of the heart, increases by 30 to 40 percent when you go from a resting state to peak exercise.

Circulatory System

Your body must manage blood flow to meet the demand of active muscles while still supplying other vital organs the blood they need to function. During exercise, blood flow to your brain remains relatively constant while blood flow to your kidneys and spleen is cut in half. Blood flow to the muscles of your heart increases by four times during exercise and your body increases blood flow to your skeletal muscles by about ten times during physical activity. Scientists call this increase in blood flow to the cardiovascular and skeletal muscles exercise hyperemia. You experience vasodilatation and decreased vascular resistance when you exercise, which means your blood vessels expand to allow blood to flow more efficiently. Your systolic pressure, or the top number on a blood pressure reading, rises while your diastolic pressure falls.

Respiratory

Increased muscle activity calls on the lungs to produce more oxygen to muscle cells and to remove excess carbon dioxide from the body. There is a linear relationship between cardiac output and oxygen uptake – the more blood your heart pumps, the more oxygen your muscles take from the bloodstream. Exercise causes your respiratory rate to increase four to five times over your resting rate. Tidal volume, or the amount of air you inhale and exhale in a single breath, increases five to seven times.

Endocrine

Your endocrine stimulates certain responses around the body through the use of hormones which act like chemical messengers. Insulin, a hormone, stimulates muscles into taking up glucose from the bloodstream, which the muscles use for energy. Your endocrine system releases other hormones during exercise, such as thyroxine which speeds up metabolism and epinephrine. Epinephrine is beneficial to your cardiovascular system, according to Western Michigan University.

Your entire body gets involved when you exercise, even if that physical activity involves only one or two body parts. Understanding the body systems used during exercise helps you optimize your workouts.
You might be interested in
Are light waves longitudinal or transverse
Marysya12 [62]

Answer:

Transverse

Explanation:

There are two types of waves, according to the direction of their oscillation:

- Transverse waves: in a transverse wave, the direction of the oscillation is perpendicular to the direction of motion of the wave. Examples of transverse waves are electromagnetic waves

- Longitudinal waves: in a longitudinal wave, the direction of the oscillation is parallel to the direction of motion of the wave. Examples of longitudinal waves are sound waves.

Light waves corresponds to the visible part of the electromagnetic spectrum, which includes all the different types of electromagnetic waves (which consist of oscillations of electric and magnetic fields that are perpendicular to the direction of propagation of the wave): therefore, they are transverse waves.

6 0
3 years ago
A point charge with charge q1 = 4.00 μC is held stationary at the origin. A second point charge with charge q2 = -4.40 μC moves
Bezzdna [24]

Answer:

W=0.94J

Explanation:

Electrostatic potential energy is the energy that results from the position of a charge in an electric field. Therefore, the work done to move a charge from point 1 to point 2 will be the change in electrostatic potential energy between point 1 and point 2.

This energy is given by:

U=\frac{K\left |q_1 \right |\left |q_2 \right |}{r}\\

So, the work done to move the chargue is:

W=U_1-U_2\\W=\frac{K\left |q_1 \right |\left |q_2 \right |}{r_1}-\frac{K\left |q_1 \right |\left |q_2 \right |}{r_2}\\r_1=\sqrt{((0.155 m)^2+0 m)^2}=0.115m\\r_2=\sqrt{((0.245 m)^2+(0.270 m)^2}=0.365m\\W=K\left |q_1 \right |\left |q_2 \right |(\frac{1}{r_1}-\frac{1}{r_2})\\W=8.99*10^9\frac{Nm^2}{c^2}(4.00*10^{-6}C)(4.40*10^{-6}C)(\frac{1}{0.115m}-\frac{1}{0.365})\\W=0.94J

The work is positive since the potential energy in 1 is greater than 2.

5 0
3 years ago
How many watt hours will 3-155amp hour 12 volt batteries wired in a parallel configuration produce?
Ede4ka [16]

Answer:

B 5580 W•hr

Explanation:

A Watt is a Volt times an Amp

3(12 V(155 A•hr)) = 5580 W•hr

4 0
3 years ago
Vector ????⃗ has a magnitude of 16.6 and is at an angle of 50.5∘ counterclockwise from the +x‑axis. Vector ????⃗ has a magnitude
natka813 [3]

Answer:

For vector u, x component = 10.558 and  y component =12.808

unit vector = 0.636 i+ 0.7716 j

For vector v, x component = 23.6316 and y component = -6.464

unit vector = 0.9645 i-0.2638 j

Explanation:

Let the vector u has magnitude 16.6

u makes an angle of 50.5° from x axis

So u_x=ucos\Theta =16.6\times cos50.5=10.558

Vertical component u_y=usin\Theta =16.6\times sin50.5=12.808

So vector u will be u = 10.558 i+12.808 j

Unit vector u=\frac{10.558i+12.808j}{\sqrt{10.558^2+12.808^2}}=0.636i+0.7716j

Now in second case let vector v has a magnitude of 24.5

Making an angle with -15.3° from x axis

So horizontal component v_x=vcos\Theta =24.5\times cos(-15.3)=23.6316

Vertical component v_y=vsin\Theta =24.5\times sin(-15.3)=-6.464

So vector v will be 23.6316 i - 6.464 j

Unit vector of v =\frac{23.6316i-6.464}{\sqrt{23.6316^2+6.464^2}}=0.9645i-0.2638j

8 0
3 years ago
In February 2004, scientists at Purdue University used a highly sensitive technique to measure the mass of a vaccinia virus (the
OlgaM077 [116]

Answer:

a)   m_v = m_s ((\frac{w_o}{w})² - 1) ,  b)  m_v = 1.07 10⁻¹⁴ g

Explanation:

a) The angular velocity of a simple harmonic motion is

           w² = k / m

where k is the spring constant and m is the mass of the oscillator

let's apply this expression to our case,

silicon only

         w₉² = \frac{K}{m_s}

         k = w₀² m_s

silicon with virus

         w² = \frac{k}{m_s + m_v}

          k = w² (m_v + m_s)

in the two expressions the constant k is the same and q as the one property of the silicon bar, let us equal

           w₀²  m_s = w² (m_v + m_s)

           m_v = (\frac{w_o}{w})²  m_s - m_s

           m_v = m_s ((\frac{w_o}{w})² - 1)

b) let's calculate

          m_v = 2.13 10⁻¹⁶ [(\frac{20.4}{2.85})² - 1)]

          m_v = 1.07 10⁻¹⁴ g

4 0
3 years ago
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