Calculate a. the heat that must be supplied to a 500.0 g copper kettle containing 400.0 g of water to raise its temperature from 22.0°c to the boiling point of water, 100.0°c. b. what percentage of the heat is used to raise the temperature of the water?

Explanation:

dH copper = mCdT copper

(Specific Heat of copper=0.385 J/g C )  

dH = 500 g (0.385 J/g C) (78 C rise)

dH = 15,015 Joules

dH water =  m C dT water

(Specific Heat of copper=4.184 J/g-C)  

dH = 400 g (4.184 J/g-C) (78 C rise)

dH = 130,540 Joules

total heat = 15,015 + 130,540 = 145,555 Joules

(130,540 Joules  / 145,555 Joules) x 100 = 89.7 %

If we consider that we have 3 Significant Figures,

then, the answers become ,

15.0 KJ must be added for Copper

130.5 KJ must be added for Water

and the total of 145 KJ must be added in the kettle with the water

89.7 %  of heat goes to the Water

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.