A15.0 m long steel rod expands when its temperature rises from 34.0 oc to 50.0 oc. what is the change in the beam's length due to the thermal expansion? steel has a coefficient of linear expansion of 12.0 e -6/co.
a 0.0612 m
b 0.00432 m
c 0.00288 m
d 0.0119 m
e 0.0475 m

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples