The closure temperature represents the point when isotopes are no longer free to move out of a crystal lattice.
Answer: Option C
<u>Explanation:</u>
The closure temperature can also be termed as blocking temperature. It is mostly used in radiometric dating. As the temperature decreases, below a certain point the isotopes may get freeze in their lattice positions. And there may be slowing of diffusion.
At the closure temperature, that rate of diffusion will be zero as the isotopes will be no longer free to move out of crystal lattice. So, this is termed as closure or blocking temperature. As the isotopes loose their ability to move, their concentration will remain fixed in their position leading to measurement of radiation dating.
Answer:
1490 N
Explanation:
The force applied by the nurse is horizontal, so there's no vertical component.
Therefore, the normal force is simply equal to the weight of the bed.
N = mg
N = (152 kg) (9.8 m/s²)
N = 1490 N
<u>Answer:</u>
2N/cm
<u>Step-by-step explanation:</u>
According to the Hooke's Law, the force required to extend or compress a spring is directly proportional distance you can stretch it, which is represented as:
where, 
is the force which is stretching or compressing the spring,
is the spring constant; and
is the distance the spring is stretched.
Substituting the given values to find the elastic constant to get:
Therefore, the elastic constant is 2 Newton/cm.
Answer:
60 W
Explanation:
The work done in lifting the object is given by:
where
F = 30.0 N is the weight of the object
d = 10.0 m is the displacement covered by the object
Using the formula,
Now we can calculate the power, which is given by
where
W = 300 J is the work done
t = 5.00 s is the time interval
Substituting,
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