An alpha particle collides with an oxygen nucleus, initially at rest. the alpha particle is scattered at an angle of 25.0° above its initial direction of motion, and the oxygen nucleus recoils at an angle of 50.0° below this initial direction. the final speed of the oxygen nucleus is 2.08×105 m/s. (the mass of an alpha particle is 4.0 u, and the mass of an oxygen nucleus is 16 u.) what is the final speed of the alpha particle?

What is the order of the moon, earth, and sun in a lunar eclipse and a solar eclipse?

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)

Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.