What experimental evidence led scientists to change from the previous model to this one?

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

Why do electron microscopes have higher resolving power than light microscopes?

Aparticle initially moving east with a speed of 20.0 m/s, experiences an acceleration of 3.95 m/s, north for a time of 8.00 s. what was the speed of the particle after this acceleration, in units of m/s? give the answer as a positive number.