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3 years ago

Which statement BEST describes how the body moves?

Physics

2 answers:

Alex73 [517]3 years ago

7 0

<h3><u>Answer;</u></h3>

A. Skeletal muscles, which are made of fibers, nerves, and blood vessels, contract in order to make the body move.

<h3><u>Explanation</u>;</h3>

<em><u>Muscular tissues functions in movement and locomotion through its direct connection with the skeletal system. </u></em>
<em><u>Skeletal muscles are responsible for moving the body. The skeletal muscle contractions pull on tendons, which as attached to bones. When the skeletal muscle contraction causes the muscle to shorten, the bone and thus the body par will move. </u></em>
<em><u>Skeletal muscles also provide structural support for the entire body. </u></em>

leva [86]3 years ago

4 0

Answer:

(A) Skeletal muscles, which are made of fibers, nerves, and blood vessels, contract in order to make the body move.

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Pulling out of a dive, the pilot of an airplane guides his plane into a vertical circle. At the bottom of the dive, the speed of

Vlad [161]

Answer:

The radius allowable for the vertical circle is 1706 meters.

Explanation:

Given that,

Speed of the airplane, v = 320 m/s

We need to find the smallest radius allowable for the vertical circle if the pilot's apparent weight is not to exceed 7.0 times his true weight . At the bottom of circle, net force is given by :

$F_N=F_c+F_g\\\\F_N=m(\dfrac{v^2}{r}+g)\\\\7gm=m(9.8+\dfrac{(320)^2}{r})$

r is radius of path

$7\times 10=(10+\dfrac{(320)^2}{r})\\\\r=1706\ m$

So, the radius allowable for the vertical circle is 1706 meters.

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3 years ago

A mass resting on a horizontal, frictionless surface is attached to one end of a spring; the other end is fixed to a wall. It ta

My name is Ann [436]

Answer:

a). $K=528.92 \frac{N}{m}$

b). $m=4.84kg$

Explanation:

a).

The work of the spring is find by the formula:

$w_s =\frac{1}{2}*k*x^2$

So knowing the work can find the constant K'

$3.2J =\frac{1}{2}*k*(0.11m)^2$

Solve for K'

$K=\frac{2*W_s}{x^2}=\frac{2*3.2J}{0.11m^2}$

$K=528.92 \frac{N}{m}$

b).

The force of the spring realice a motion so using the force and knowing the accelerations can find the mass

$F=m*a$

$m=\frac{F}{a}=\frac{K*x}{a}$

$m=\frac{528.9*0.11m}{12m/s^2}$

$m=4.84kg$

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3 years ago

If the resistance remains constant and the voltage doubles, what effect will that have on the power?

aalyn [17]

One of the handy formulas for electrical power is

Power = (Voltage)² / (Resistance)

Since the voltage is squared, if you double the voltage and
the resistance doesn't change, the power will increase by
the factor of (2²), which is 4 times the original power.

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3 years ago

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erma4kov [3.2K]

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3 years ago

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Damm [24]

Answer:

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