Which of the following is an example of radiation?( need explanations) A. Burning your finger on a hotplate.
B. Moving currents inside an oven, heating food.
C. Skin getting sunburned.
D. A warm weather front moving from the southeast.

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.

Which tool is least in predicting weather