Final answer:
The speed of a 0.149 kg baseball with a kinetic energy of 104J is approximately 21.77 m/s.
Step-by-step explanation:
The kinetic energy of a baseball can be calculated using the formula KE = 1/2 * mass * velocity^2. We are given the mass of the baseball (0.149 kg) and the kinetic energy (104 J). By rearranging the formula, we can solve for velocity: velocity = sqrt(2 * KE / mass).
Plugging in the values, we get velocity = sqrt(2 * 104 J / 0.149 kg) = 21.77 m/s.
Therefore, the speed of the baseball is approximately 21.77 m/s.