Afrequency generator (a device that produces sinusoidal signals whose frequency and amplitude can be independently set) is used to power a horn. the frequency is set to 2000 hz, and for a particular amplitude the sound intensity is measured to be 0.050 w/m2 at a distance of 6.0 m . part a what is the power output of the horn in this case? express your answer with the appropriate units.

1) when you rub your hands together quickly, the kinetic energy is converted to mechanical energy.2) thermal energy from the sun travels to earth as infrared waves.3) energy is transferred through the matter of space by electromagnetic waves. 4) when a match is burned, chemical potential energy is converted to thermal and radiant energy. 5) seismicwaves are caused by back and forth movement , or vibration, of an object. 6) mechanicalenergy in an engine changes thermal energy into kinetic energy to make a car move.

the best answer for these questions would be:

1.            c. is smaller

2.            d) concrete operational

3.            b) interaction with the environment – the children interact with their environment can them learn more.

4.            a) parents who reason openly with children can limit a child’s cognitive ability.

The magnets are probably damaged or there not strong enough to attached to the refrigerator