IF YOU CAN HELP WITH JUST THREE OR MORE, IT ISA GUARANTEED LIFE SAVER..... THANK
ID: 1733476 • Letter: I
Question
IF YOU CAN HELP WITH JUST THREE OR MORE, IT ISA GUARANTEED LIFESAVER..... THANK YOU KINDLY (IF YOU CANASSIST WITH ALL, THAT WOULD ALSO BE HIGHLYAPPRECIATED) : )1.))What are inenergy changes in digestion of food?>>>.>>>.>>.2.))))How did Galileo’swork lead the way forNewton?>>>..>>>>3.) .How does water help to keepthe temperature of the earth fairlystable?>>.>>>.4.) A system undergoes adecrease in internal energy of 13,000 J while the system does 4,000J of work, does heat escape or is it added to the system? How much?>>.>>>5.)A roller coaster carat a height of 12 m moving at 3.0 m/s descends to a height of 4.0m. What is its speed then assuming no friction? IF YOU CAN HELP WITH JUST THREE OR MORE, IT ISA GUARANTEED LIFESAVER..... THANK YOU KINDLY (IF YOU CANASSIST WITH ALL, THAT WOULD ALSO BE HIGHLYAPPRECIATED) : )
1.))What are inenergy changes in digestion of food?>>>.>>>.>>.2.))))How did Galileo’swork lead the way forNewton?>>>..>>>>3.) .How does water help to keepthe temperature of the earth fairlystable?>>.>>>.4.) A system undergoes adecrease in internal energy of 13,000 J while the system does 4,000J of work, does heat escape or is it added to the system? How much?>>.>>>5.)A roller coaster carat a height of 12 m moving at 3.0 m/s descends to a height of 4.0m. What is its speed then assuming no friction?
Explanation / Answer
energy change............... now..,, change in Internal energy(U) =change in Heat energy(H) + work Done (W) => 13000 = 4000( work done bysystem is +ve) + H => so Heat = 9000 j so heat is given to body.....
roller coaster...... by conservation of energy......... Mass(M) x g x Height initial(H1) + .5 x M xV(i)^2 = M x g x H(f) + .5 x M x V(f)^2 => so he masses on either side cacelout.......... and we get speed by putting.....H(i) = 12m,, H(f) = 4 mt ,, V(i) = 3 m/s
i m too weak in theory.............but may b ican help out in energy change in digestion......... see,, 1) -work is done in "intake of food" , 2) - chemical energy by acids in stomach 3) - heat absorption from body & heat release duringreations on food 4)- innternal energy remains constant ....so all energy is dueto work &heat transfer