Explain how the balance of gravity versus thermal pressure predicts that a cloud should fragment into many stars
What will be an ideal response?
Clouds collapse when their self-gravity exceeds the support provided by thermal pressure. For any given density and temperature, any cloud greater than a certain mass (Mbalance in Mathematical Insight 16.1 ) will collapse. As it collapses, the cloud becomes denser and the balance mass becomes smaller. Therefore, individual sub-pieces of the cloud can collapse. The collapsing cloud therefore fragments into many smaller, collapsing pieces. Eventually a cluster of low mass stars is formed rather than a single massive star.
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A series circuit consists of a 0.440-H inductor, a 380.0-? resistor, a 5.70-?F capacitor, and an ac voltage source of amplitude 250V. Find the rms voltage across the capacitor when the circuit operates at resonance
What will be an ideal response?
Radiation: In an electric furnace used for refining steel, the temperature is monitored by measuring the radiant power emitted through a small hole in the wall of the furnace, of area 0.5 cm2. This hole acts like a perfect blackbody radiator having the same temperature as the interior of the furnace. If the temperature of the furnace (and therefore of the hole) is to be maintained at 1650°C, how much power will the hole radiate?
A. 20 W B. 30 W C. 40 W D. 50 W
Jupiter radiates less heat than it absorbs from the sun
Indicate whether the statement is true or false
Meteor showers are the result of collisions between asteroids
Indicate whether the statement is true or false