Calculate the amount of energy needed to convert 10g of ice from -20 °C to liquid water at 60 °C ice specific heat= 2.09 J/g°C
water specific heat= 4.18 J/g°C
steam specific heat= 1.84 J/g°C
Hfus= 6.02 KJ/mol
Hvap= 40.7 KJ/mol

Need what is special about water as a compound? how does water regulate climate? what drives water evaporation?   why is the water vapor fresh water when it rises from the ocean? why might freshwater in the form of snow take longer to enter the water cycle again than liquid precipitation?   what is an aquifer? what role do people play in the water cycle? plz just answer as many as you can ! thx if you !

Air pressure is measured in pascals. for a professional american football game, the ball should be inflated to about 90,000 pascals. scientists studied the effects of air temperature on the pressure inside american footballs by taking these steps: 1. prepare 100 footballs. 2. measure each football's air pressure. 3. divide footballs into 10 groups. 4. place the groups in different lockers cooled to different air temperatures. 5. after 12 hours, remove the footballs from lockers. 6. measure each football's pressure again. 7. compare the new pressures to the starting pressures. what two terms best describe the variable "air pressure inside the football" in this experiment? independent, qualitative independent, quantitative dependent, qualitative dependent, quantitative

If you try to move a piano and are unable to move it, did you perform any work in the scientific sense of the word? yes or no?