Answer:
C
Explanation:
total energy = potential energy + kinetic energy
<span>Areas near oceans or large lakes tend to have more moderate climates than do areas far from large bodies of water. Which of these statements best explains this observation?
~ Water has a very high specific heat.
A scientist discovers a new substance. The molecules of the substance form hydrogen bonds with each other. When the molecules lose a lot of energy, the hydrogen bonds hold them relatively far apart. Based on this information, what can the scientist infer about the substance?
~ It expands when it freezes.
Which of the following properties of water is due primarily to the uneven distribution of charge between the hydrogen and oxygen atoms?
~ its ability to dissolve ionic substances
A drop of water placed on a smooth, dry surface will form a dome-shaped droplet instead of flowing outward in different directions. Which of these best explains this observation?
~ The electrons in the atoms attract the electrons in the other atoms.</span>
The answer would be an alpha particle because the beta particle doesn't carry the amount of protons and neutrons.
Answer:
Explanation:
Mass of car (M)=1200kg
Initial velocity (u)=20m/s
Stop after time (t)=3sec.
Come to stop implies that the final velocity is zero, v=0m/s
Using newton second law of motion
F=m(v-u)/t
Ft=m(v-u)
Since impulse is Ft
I=Ft
Then, I=Ft=m(v-u)
I=m(v-u)
I=1200(0-20)
I=1200×-20
I=-24,000Ns
The impulse delivered to the car by static friction is -24,000Ns
