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Valentin [98]
3 years ago
10

Which of the following is an example of a concentric contraction

Chemistry
2 answers:
ladessa [460]3 years ago
8 0

Answer:

B: bicep curl

Explanation:

In a bicep curl the muscle in the biceps contracts or shortens creating a tension on the muscle. During concentric contraction a lot of force is generated that allows the movement of an object such as a dumbbell.  As the dumbbell is moved to the shoulder the bicep bulges or contracts. Concentric contraction is used for muscular hypertrophy.

anastassius [24]3 years ago
3 0
The best and the correct answer among the choices provided by the question is the second choice or letter B.

A bicep curl is a<span>n example of a concentric contraction.


</span>I hope my answer has come to your help. Have a nice day ahead and may God bless you always!
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7 0
3 years ago
Water is poured into a conical container at the rate of 10 cm3/sec. The cone points directly down, and it has a height of 20 cm
8090 [49]

Answer:

\frac{dh}{dt}_{h=2cm} =\frac{40}{9\pi}\frac{cm}{2}

Explanation:

Hello,

The suitable differential equation for this case is:

\frac{dV}{dt}=10\frac{cm^3}{s}

As we're looking for the change in height with respect to the time, we need a relationship to achieve such as:

\frac{dh}{dt} = ?*\frac{dV}{dt}

Of course, ?=\frac{dh}{dV}.

Now, since the volume of a cone is V=\pi r^2h/3 and the ratio r/h=15/20=3/4 or r=3/4h, the volume becomes:

V=\pi (\frac{3}{4} h)^2h/3= \frac{3}{16}\pi h^3

We proceed to its differentiation:

\frac{dV}{dh} =\frac{9}{16} \pi h^2\\\frac{dh}{dV} =\frac{16}{9 \pi h^2}

Then, we compute \frac{dh}{dt}

\frac{dh}{dt} = \frac{16}{9 \pi h^2}*\frac{dV}{dt}\\\frac{dh}{dt} = \frac{16}{9\pi h^2}*10\frac{cm^3}{s} =\frac{160}{9 \pi h^2}

Finally, at h=2:

\frac{dh}{dt}_{h=2cm} =\frac{160}{9\pi 2^2}\\\frac{dh}{dt}_{h=2cm} =\frac{40}{9\pi}\frac{cm}{s}

Best regards.

4 0
3 years ago
Why the measured pressure of a gas under conditions that are very close to those that would result in condensation will be lower
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Answer:

Inter-molecular forces and molecular volumes are the chief reasons for lower measured pressure

Explanation:

The kinetic theory assumes that gas particles occupy a negligible fraction of the total volume of the gas. It also assumes that the force of attraction between gas molecules is zero.

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On the other hand,  close to condensation, the other  assumption of negligible forces of attraction becomes invalid. As inter-molecular distances decrease, inter-molecular forces increase reducing the bombardment of the wall of the container due to restricted particle movement and lower measured gas pressure.

3 0
3 years ago
The chemical symbols of hydrogen, calcium and chlorine are:
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Answer:

H, Ca, Cl is the answer dude

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