The graph shows the changes in the phase of ice when it is heated. A graph is plotted with temperature in degree Celsius on the y axis and Time in minutes on the x axis. The temperature at time 0 minute is labeled A, the temperature at time 2 minutes is labeled B, the temperature at time 25 minutes is labeled C, the temperature at time 80 is labeled D. Graph consists of five parts consisting of straight lines. The first straight line joins points 0, A and 2, B. The second straight line is a horizontal line joining 2, B and 12, B. Third straight line joins 12, B and 25, C. Fourth straight line is a horizontal line which joins 25, C and 80, C. Fifth straight line joins 78, C and 80, D. Which of the following temperatures describes the value of B?

c. is the answer

by love gaming

(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

the answer is yes

it has kinetic energy

reason

an object has kinetic energy when you stop the force carrying it, the object will stay in motion.

hope this contact me for more questions if you'd like: )