When the television is working, 1200 joules of energy are supplied to the television every second, the useful energy transferred by the television is 720 joules every second. calculate the efficiency of the television. show clearly how you work out your answer.

Complete the statement about memory improvement. ( )involves organizing and breaking down information into easier groups to expand capacity. rehearsal is the verbal repetition of information. these techniques are especially important for the improvement of ( ) memory.

Awave with a frequency of 500 hz is traveling at a speed of 100 m/s.what is the wavelength?

Which of these statements best explains how the hydrosphere interacts with the atmosphere to affect global climate? mountains block rain clouds and cause changes in global rainfall and evaporation. humans burn fossil fuels to produce greenhouse gases which cause global warming. humans cut down trees which affects the amount of oxygen in different parts of the globe. greenhouse gases, like carbon dioxide, dissolve in oceans and prevent global warming.