Answer:
Total distance travelled = 210m
Explanation:
Distance travelled = 80m + 50m + 10m + 70m
= 210m
The correct answer is c because B) is a vector which includes both velocity and direction
<span>the difference of electrical potential between two points. hope this helps</span>
Answer:
vf = v₁/3 + 2v₂/3
Explanation:
Using the law of conservation of linear momentum,
momentum before impact = momentum after impact
So, Mv₁ + 2Mv₂ = 3Mv (since the railroad cars combine) where v₁ = initial velocity of first railroad car, v₂ = initial velocity of the other two coupled railroad cars, and vf = final velocity of the three railroad cars after impact.
Mv₁ + 2Mv₂ = 3Mvf
dividing through by 3M, we have
v₁/3 + 2v₂/3 = vf
vf = v₁/3 + 2v₂/3
Answer:
formal operations
Explanation:
In the period of formal operations the young man is already able to reason about hypotheses insofar as he is able to form abstract conceptual schemes and through them to perform mental operations within the principles of formal logic. With this, the adolescent acquires "the capacity to criticize social systems and propose new codes of conduct: discusses moral values of their parents and builds their own (thus acquiring autonomy)".
An example of the period of formal operations can be seen in the question above, where a teenager was able to think for himself how to test the hypotheses of an experiment to arrive at a concrete conclusion about it.
