Answer:
v=9.6 km/s
Explanation:
Given that
The mass of the car = m
The mass of the truck = 4 m
The velocity of the truck ,u= 12 km/s
The final velocity when they stick = v
If there is no any external force on the system then the total linear momentum of the system will be conserve.
Pi = Pf
m x 0 + 4 m x 12 = (m + 4 m) x v
0 + 48 m = 5 m v
5 v = 48
v=9.6 km/s
Therefore the final velocity will be 9.6 km/s.
Answer:
A. 58.8m/s
Explanation:
The acceleration due to gravity is 9.8 m/s², so the velocity after 6 seconds is ...
v = at
v = (9.8 m/s²)(6 s) = 58.8 m/s
Average speed = total distance/total time.
Answer:
a) False.
b) True.
c) Flase.
Explanation:
a) An experiment proposes a possible explanation for a natural phenomenon.
False: An experiment doesn't propose possible explanation for a natural phenomenon. Actually, an experiment is designed to test already proposed explanations which normally are first developed in a more <em>theorical </em>context.
b) A experiment must be stated in a way that it can be tested by experiments.
True.
b) An experiment is a theory that has been validated many times by many scientists.
Flase: An experiment is no a theory, but a tool to test theories.
Answer:
charge = electrons + protons
=92+92
=184
