Select all that apply. The spectrum of Star B is compared to a reference hydrogen spectrum. What can be concluded about Star B?

o. Star B is moving toward Earth.
o. Star B has no radial motion.
o. Star B is moving away from Earth.
o. Star B may have transverse motion.

Write short note on the following ; collision theory, rotation angle and angular velocity, centripetal acceleration, coriolis force, and newton's law of gravitation.

You are given two vectors a⃗ =−3.00ι^ 5.00j^ and b⃗ =5.00ι^ 2.00j^. let the counterclockwise angles be positive.

The freezing and boiling point of a substance changes as the air pressure around it changes. for example, at a lower air pressure (higher altitude) it is easier for water molecules to escape from liquid into the air. in a high altitude city such as denver, colorado compared to a sea-level city such as houston, texas, water