In general, the time it takes from when in interstellar cloud fragment first begins collapsing until it gives birth to a main-sequence star is In general, the time it takes from when in interstellar cloud fragment first begins collapsing until it gives birth to a main-sequence star is shorter for less massive stars. about the same for all stars. dependent on the rotation rate of the star. longer for less massive stars.

hope it

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west

a sonic boom is a loud boom that breaks the sound barrier

explanation:

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.