What are the agonist and antagonist muscle of a wrist joint???

2 answers:

4 0

Wrist flexors are the agonist muscles, while wrist extensors are the muscle antagonists. The specific names are the flexor digitorum and the extensor digitorum.

Andreas93 [3]3 years ago

4 0

This is because it is the prime mover in both cases. 2. Antagonist: The antagonistin a movement refers to the muscles that oppose the agonist. During elbow flexionwhere the bicep is the agonist, the tricep muscle is the antagonist.

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Five-gram samples of copper and aluminum are at room temperature. Both receive equal amounts of energy due to heat flow. The spe

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Answer:

c. The copper will get hotter than the aluminum.

Explanation:

The energy due to heat flow, i.e. the heat energy, is proportional to the product of the mass, the specific heat capacity, and the change in temperature:

$Heat=mass\times \text{specific heat capacity }\times\Delta T$

From which you obtain:

$\Delta T=\dfrac{Heat}{mass\times \text{specific heat capacity}}$

That equation tells that the change in temperature is inversely related to the product of the mass and the specific heat.

In the problem, the masses of the samples of copper and aluminum are equal (5.00g) and both samples receive equal amounts of energy due to heat flow, thus the only difference is the specific heat capacity of each sample.

From the above stated relationship between the change in temperature, the heat, the mass, and the specific heat capacity, under the assumption of all the other conditions equal (heat energy and mass), the higher the specific heat capacity the lower the change in temperature, and the lower the specific heat capacity the greater the change in temperature.

The heat capacity of copper (0.09 cal/g°C) is lower than the specific heat capacity of aluminum is (0.22 cal/g°C), thus the increase in temeperature of the copper sample will be greater than that of the aluminum sample. This means that the copper will get hotter than the aluminum (option c.)

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aqueos barium chloride reacts with aqueous sodium sulfate to produce solid barium sulfate and aqueous sodium chloride

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Answer:

1 Ba + 1 SO4^-2 -----> 1 Ba^2 SO4^-2