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frutypatooty4me
Guest
hey, i kinda need help with a few questions for my earth science work because i kinda do not get it well enough and i can barely go to extra help...well, here are my questions:
1) at which temperature will an object radiate the greatest amount of electromagnetic energy? 1) 0 degrees Fahrenheit 2) 5 degrees Celsius 3) 10 degrees Fahrenheit 4) 230 K
2)a student is using an apparatus to perform an investigation. the two calorimeters contain equal amounts of water, and a metal bar is touching the water inside each calorimeter. at the beginning of the investigation, the temp of the water of the first calorimeter was 100 degrees Celsius and 20 20 degrees Celsius in the other calorimeter. the room temp is 20 degrees Celsius. if this were a closed system, what would be the temp when the system reaches equilibrium? 1) 100 degrees Celsius 2) 75 degrees Celsius 3) 60 degrees Celsius 4) 40 degrees Celsius
2A) which conclusion should the student make after performing this investigation? 1) the energy gained by the cold water equaled the energy lost by the hot water. 2) the energy gained by the cold water was less than the energy lost by the hot water. 3) the change in temp of the cold-water thermometer equaled the change in the temp of the hot-water thermometer. 4) energy was transferred between the two calorimeters primarily by radiation.
2b) which procedure would best increase the amount of heat energy that is actually gained by the calorimeter with the lowest temp? 1) increasing the length of the metal bar 2) increasing the thickness of the metal bar 3) circulating air over the metal bar 4) placing insulation around the metal bar
anyway, thanks for all your help, people
p.s. sorry for the length of this but i reeeeaaallly need heeeelllllllpppp!!!!
1) at which temperature will an object radiate the greatest amount of electromagnetic energy? 1) 0 degrees Fahrenheit 2) 5 degrees Celsius 3) 10 degrees Fahrenheit 4) 230 K
2)a student is using an apparatus to perform an investigation. the two calorimeters contain equal amounts of water, and a metal bar is touching the water inside each calorimeter. at the beginning of the investigation, the temp of the water of the first calorimeter was 100 degrees Celsius and 20 20 degrees Celsius in the other calorimeter. the room temp is 20 degrees Celsius. if this were a closed system, what would be the temp when the system reaches equilibrium? 1) 100 degrees Celsius 2) 75 degrees Celsius 3) 60 degrees Celsius 4) 40 degrees Celsius
2A) which conclusion should the student make after performing this investigation? 1) the energy gained by the cold water equaled the energy lost by the hot water. 2) the energy gained by the cold water was less than the energy lost by the hot water. 3) the change in temp of the cold-water thermometer equaled the change in the temp of the hot-water thermometer. 4) energy was transferred between the two calorimeters primarily by radiation.
2b) which procedure would best increase the amount of heat energy that is actually gained by the calorimeter with the lowest temp? 1) increasing the length of the metal bar 2) increasing the thickness of the metal bar 3) circulating air over the metal bar 4) placing insulation around the metal bar
anyway, thanks for all your help, people
p.s. sorry for the length of this but i reeeeaaallly need heeeelllllllpppp!!!!