Explain whether a particle moving in a straight line with constant speed does or does not have an acceleration. b) Explain whether a particle moving around a curve with constant speed does or does not have an acceleration.

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.

Based on the diagram of the electric field lines around the two spherical charges, what are the signs of the left and right charge respectively?

If 0.05j work is done by stirring a cup of tea, if 150ml of tea is stirred 50 times and temperature rises to 67c° what will be the increase in entropy? a)0.007j/k b)1.1j/k