Two identical blocks are heated to different temperatures. The blocks are placed so that the touch, and heat begins to flow between the blocks. The pair of blocks is insulated, so no
energy escapes.
65°C
Block 1
30*C
Block 2
Later, the temperature of each block is measured again. Which pair of temperatures is
possible?
41°C
33°C
Block 1
30°C
Block 2
54°C
Block 1
Blocs: 2
55°C
43°C
90°C
Block 1
52°C
Block 2
Block 2
Block 1

може ли да зареждате повече информация, моля

the answer is c.the valence of the atoms combine .

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied