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Vladimir [108]
3 years ago
14

What temperature, in ∘c, is a blackbody whose emission spectrum peaks at 250 nm ?

Physics
1 answer:
Anettt [7]3 years ago
6 0
Wein's law states that:

Peak wavelength (m)*Temperature (K) = 2.898*10^-3 m.K

In this  case, Peak spectrum = 250 nm = 250*10^-9 m

Temperature (K) = (2.898*10^-3)/(250*10^-9) = 11592 K

In °C, Temperature =  11592-273.15 = 11,318.85 °C
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Explanation:

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When there is an increment or increase in the magnitude of velocity of a moving body then it is known as positive acceleration.

Whereas when there is a decrease in magnitude of velocity of a moving body then it is known as negative acceleration.

Thus, we can conclude that positive acceleration occurs when an object speeds up.

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3 years ago
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Answer:

Gravity, normal force, friction, and air resistance.

Explanation:

Assuming the ball is on earth, there is always gravity acted upon the object.

Since the problem said that the golf ball is moving throughout the air, we can tell that there will be air resistance and friction(air resistance is a type of friction). There is also normal force pushing on the ball as it bumps into the air, as the air is pushing back with an equal and opposite force.

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azamat

Answer:

Explanation:

v_f^2 = v_i^2-2a(x_f-x_i)

Subtract both sides by v_i^2:

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Add both sides by x_i:

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Subtract both sides by \frac{v_i^2 - v_f^2}{2a}:

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