A submarine uses a sonar to measure the depth of water below it Reflected sound waves are detected 0.40s after they are transmitted. How deep is the water?(Speed of sound in water=1500m/s

The graph below represents the work done by a student while running up flights of stairs. determine the student's power output after 10 seconds: 1600 j/s 8000 j/s 160 j/s 800 j/s

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.

A1.5m wire carries a 2 a current when a potential difference of 52 v is applied. what is the resistance of the wire?