A schematic can tell an electrician that the switches are normally until the sensor senses smoke.
A. locked
B. open
C. closed
D. charged

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e

Ascientist wants to test ways to reduce pollution in lake . what is the bestway of doing this