A needle 5cm long can just rest on the surface of water without wetting. what is weight? (surface tension of water =0.075n/m)

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

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?

The largest observatory complex in the world is on mauna kea, the tallest mountain on earth. what are some factors astronomers consider when selecting an observatory site? don’t forget practical ones. should astronomers, for example, consider building an observatory on denali (mount mckinley) or mount everest?