5. Installing exit lights that run on batteries into a building means that - * 1 pc O A technicians have to test, maintain, and replace the batteries regularly.
B building occupants have to report burned out lights immediately.
C the building requires a larger emergency generator than usual.
D the exit lights have to be placed closer together because they are not as bright.

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.

3. a worker pushes a 30.5 kg polished stone along a polished table with a force on bonin a straight line for 5.20 s after starting from rest. there is no friction between thestone and the table. at the end of the table. the stone is hooked to a cable with a lengthof 62.0 cm to rotate it to a rough table to store until they can be picked up. the roughtable has a coefficient of static friction 0.702 with the polished stone. remember that 8= 9.80 m/s2a) what is the speed of the stone when it is hooked to the cable? b) what is the tension in the cable while the stone is rotating? (there is still nofriction)c) how much force is needed to make the stone begin sliding from rest on therough table? ius = 0.70262.0 cm30.5 kg20.5 kg6= 0

Which of these has some mechanical energy? a. an atom b. heat inside earth c. a book on a shelf d. the fire from a lit match