**Answer:**

**Explanation:**

Since the centripetal force F_C is, in this case, the gravitational force F_G exerted by the planet, we can say that:

In the case of the satellite A we have:

And in the case of the satellite B:

Finally, using these two expressions, we obtain :

In words, the centripetal acceleration a_b is equal to one fourth of a_0.

Answer: 2.13 E 4 J

Explanation: Heat absorbed = mass * specific heat capacity * change in temperature

= 0.5 * 387 * (400 - 290) J

= 0.5 * 387 * 110 J = 21285 J = 2.13 E 4 J

**Answer:**

**Explanation:**

The distance traveled by the sound wave between the beats of the wing is its wavelength, since it is defined as the distance traveled by a periodic disturbance that propagates in a cycle, is defined as:

Where v is the speed of sound and f the frequency of the wing beats

Im pretty sure its A. volleyball