A. On a hot day, a concrete sidewalk feels hotter than the water in a small swimming pool. And a sandy beach feels hotter than the lake or ocean. What do these observations tell you about temperature changes when different materials are heated? B. Plan a controlled experiment to investigate how much the temperature of cold sand and cold water change when hot water is added to them. Assume you have access to water, sand, containers, ice, a heat source, a scale, and thermometers. Summarize your experiment in a few sentences.

C. From your experiment in Part B, which factors would you keep constant?

DONT ANSWER IF YOU DONT KNOW

a basic solution is an aqueous solution containing more oh-ions than h+ions. in other words, it is an aqueous solution with a ph greater than 7. basic solutions contain ions, conduct electricity, turn red litmus paper blue, and feel slippery to the touch.

explanation:

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

answer carbon and three oxygen atoms;

the formula for the conversion of temperature from degree celsius to kelvin is:

the sample of water at is converted to kelvin temperature by using the above formula as:

on comparing the two samples of water at or we can say that at and at respectively. the difference between the temperatures of two samples of water is:

hence, one can say that the sample of water at is greater than the sample of water at by .