You have collected exactly 1600 aluminum cans for recycling, each with a mass of 14.2 g. how much energy is needed to melt them if their initial temperature is 26.3â¦c? assume the specific heat, the latent heat and the melting point of aluminum are 899 j/kg â·â¦ c,
3.97 ã 105 j/kg and 660.4 â¦c, respectively. answer in units of j.

The heat requied is

Explanation:

According to the given data

1) Initial temperature of can =

2) Specific Heat of Aluminum can =

3) Latent Heat of Aluminum can =

4) Melting point of of Aluminum can =

5) Toatl mass of of Aluminum can =

Now in order to melt the can we first need to raise it's temperature from to

Thus the ensergy required is calculated as

Now the heat required to change the phase from solid aluminum to liquid phase can be calculated as

Thus the total heat required is

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min