How can a scientist assess whether a pure niobium sample is responsible for contaminating the lab with radioactivity
2 answers:
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Answer:
Explanation:
The heat (thermal energy) absorbed by the iron skillet can be found using the following equation:
(1)
Where:
is the heat (absorbed)
is the mass of the element (iron in this case)
is the specific heat capacity of the material. In the case of iron is
is the variation in temperature
Knowing this, lets rewrite (1) with these values:
(2)
Finally:
Answer:
G. It will take twice as long.
Explanation:
Let's call the original speed of the plane and
the distance between Dallas and Pensacola. The time the plane originally takes to complete the flight is
In this problem, we are told that the plane encounters wind moving at half of its speed: , in the opposite direction. This means that the new speed of the plane is
And so, the time the plane takes now to complete the flight is
So, the plane takes twice the time as before.