The motor oil in a car's engine will accumulate dirt over time, and it is recommended that the oil in a car's motor be changed regularly. Car mechanics use an instrument called a hydrometer to determine if the oil needs to be changed. Explain the steps in using a hydrometer and how a hydrometer uses specific gravity to test the motor oil for dirt.
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Akg a of 55 m at an of 11 ? . if is at 98 km/h,be ?

Tafari worked one summer on a ship that set weather buoys in the ocean. he watched how one of the buoys moved in the water. describe which parts of the wave would cause the buoy to bob up and down. which wave property determined how fast the buoys bobbed in the water? he observed that when the wind blew harder, the ocean waves were larger, and the buoys moved away from the ship. what effect, if any, did the waves have on how far the buoys moved? explain your answer.

What organization and environment is described above?