A vector has an x-component of 19.5 m and a y-component
of 28.4 m.
Find the magnitude of the
vector.

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?

Discuss how the hardness or softness of the landing surface is related to the time required to stop the egg

The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?