An alpha particle (mass = 4 u) has a head-on, elastic collision with a nucleus (mass = 104 u) that is initially at rest. What percentage of the kinetic energy of the alpha particle is transferred to the nucleus in the collision?

Astronomers discover an exoplanet (a planet of a star other than the sun) that has an orbital period of 3.87 earth years in its circular orbit around its sun, which is a star with a measured mass of 3.59 x 1030 kg. find the radius of the exoplanet's orbit.

Aregular polygon has angkes of size 150° each.how many side has the polygon

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.