Water is flowing at a rate of 0.25 m3/s, and it is assumed that head loss in the system is 2V2/2g from the reservoir to the gage, where V is the velocity in the 30 cm pipe. What power must the pump supply

Which changes of state do the labels represent? a: b: c:

What is the energy of a photon of ultraviolet radiation with a frequency of 4.4 × 1015 hz? planck’s constant is 6.63 × 10–34

Currents in dc transmission lines can be 100 a or higher. some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers. for a line that has current 150 a and a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? express your answer in teslas and as a percentage of the earth’s magnetic field, which is 0.50 g. is this value cause for worry?