Who was the fist man on moon

What if? if the temperature near the cliff suddenly falls to 0°c, reducing the speed of sound to 331 m/s, what would the initial speed of the rock have to be (in m/s) for the soccer player to hear the sound of the splash 2.90 s after kicking the rock?

In a load, the load is paralel to the shaft. n a. angular n b. thrust n c radial n d. none of the above

Akg a of 55 m at an of 11 ? . if is at 98 km/h,be ?