Aplanet orbits a star in an elliptical orbit. at a particular instant the momentum of the planet is kg-m/s, and the force on the planet by the star is -3.9 x 1022,-1.7 x 1023, 0> n. find fii and f? . (express your answers in vector form)

What happens to the light rays when they hit the specimen?

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

Quantum mechanics applies to subatomic, atomic, nanometer-size, and micrometer-size systems. nanometer, micrometer, and kilometer-size systems. atomic, nanometer-size, and micrometer-size systems. subatomic, atomic, and nanometer-size systems.