En un parque de beisbol, la distancia de la loma de lanzar y el plato es de 18.5 m. Si un lanzador puede lanzar una pelota a 38.5m/s, ¿cuánto tiempo le tomará a la pelota llegar
al plato?

Agymnast dismounts off the uneven bars in a tuck position with a radius of 0.3m (assume she is a solid sphere) and an angular velocity of 2rev/s. during the dismount she stretches out into the straight position, with a length of 1.5m, (assume she is a uniform rod through the center) for her landing. the gymnast has a mass of 50kg. what is her angular velocity in the straight position?

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?