Microwaves are sent through a material causing the molecules in the material to twist and vibrate, causing the material to heat up. What is this twisting and vibration of the molecules creating heat an example of? A. a microscopic change creating a microscopic output
B. a macroscopic change creating a macroscopic output
C. a microscopic change creating a macroscopic output
D. a macroscopic change creating a microscopic output

C.a microscopic change creating a macroscopic output

Explanation:

When food is subjected to microwaves generation of polar molecules takes place in order to align themselves with the magnetic field. An oscillating field causes the molecules to keep changing their orientation. As the field keeps changing direction alternating the molecules move around cause collisions and rub against each other. This causes heat generation.

The moving of the molecules is a microscopic change which we cannot see with our bare eyes. The movement of the molecules causes the heat generation which is a macroscopic change.

So, the answer is C.a microscopic change creating a macroscopic output.

-first use of geothermal energy occurred more than 10,000 years ago in north america by american paleo-indians

-the first industrial use of geothermal energy began near pisa, italy in late 18th century

-in 1904, italian scientist piero ginori conti invented the first geothermal electric power plant in which steam was used to generate the power

-with the above experiment, the first geothermal plant in usa started in 1922 with a capacity of 250 kilowatts

-however, in 1946 first ground-source geothermal heat pump installed at commonwealth building in portland, oregon

-during the 1960’s, pacific gas and electric began operation of first large scale geothermal power plant in san francisco, producing 11 megawatts

-in 1973, when oil crisis began many countries began looking for renewable energy sources and by 1980’s geothermal heat pumps (ghp) started gaining popularity in order to reduce heating and cooling costs

-as effect of climate change started showing results, governments of various countries joined hands to fight against it, for which kyoto protocol was signed in japan in 1997, laid out emission targets for rich countries and required that they transfer funds and technology to developing countries, 184 countries have ratified it

hope this

c) power lifting, will be your answer.

,

deku ❤