The glowing filament in a lamp is radiating energy at a rate of 60 {\rm w}. at the filament’s temperature of 1500{\rm ^\circ c}, the emissivity is 0.23.
what is the surface area of the filament? (in m2)

What is a possible result of higher air temperature caused by global warming

What determines the amount of inertia an object has

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.