Select the correct answer. Which two atoms are isotopes of each other?
O A. si and 25 mg
OB. Z. Mg and 7 AI
Oc 7, Mg and 23 Mg
OD. 73 Na and 22 Mg
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State the right hand rule of the direction of magnetic field in a conductor carrying current

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

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.