An atom of gadolinium has an atomic number of 64 and a mass number of 154. how many electrons, protons, and neutrons does it contain?

The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.

Which type of energy would have nothing to do with ironing clothes? a. heat b. chemical c. electrical d. mechanical

Ascientist wants to test ways to reduce pollution in lake . what is the bestway of doing this