During the growth of planetesimals to protoplanets, could the planetesimals have collided into one another? Why or why not?
What will be an ideal response?
If planetesimals had collided at orbital velocities, they would have been unable to stick together. Typical orbital velocities in the Solar System are many kilometers per second. Head-on collisions at these speeds would vaporize the material. However, the planetesimals were all moving in the same direction in the nebular plane and didn't collide head-on. Instead, they merely "rubbed shoulders," so to speak, at low relative velocities. Such gentle collisions would have been more likely to combine planetesimals than to shatter them.
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A series LRC circuit connected across an ac voltage source will have a positive value of the phase angle at high frequencies
Indicate whether the statement is true or false
If an AC circuit consists of a 220 mH inductor in series with a 75 k
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