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In a thermostat, the property of the bimetallic coil that allows it to contract and expand is that The two metals absorb different amounts of thermal energy.
This bimetallic coil is used to transform thermal energy into mechanical movement. Two metals with different thermal expansivity are joined together parallelly and the changes of temperature cause bending in different directions depending on if the temperature is rising or descending.
The differences in the thermal energy absorption of the two metals are the basis for the mechanism of this device.
Explanation:
Use half life equation:
A = A₀ (½)^(t / T)
where A is the final amount,
A₀ is the initial amount,
t is time,
and T is half life.
0.375 = 3 (½)^(1 / T)
0.125 = (½)^(1 / T)
(½)^3 = (½)^(1 / T)
3 = 1 / T
T = 1/3 hours
T = 20 minutes
Answer:
0.7 N
Explanation:
q1 = 7 micro coulomb
q2 = - 3 micro coulomb
distance = r
Force, F = 3.7 N
Let the new force be F'.
By use of Coulomb's law
.... (1)
Now touch the spheres,
q1 = q2 = (7 - 3 )/ 2 = 2 x 10^-6 C
Now
.... (2)
Dividing equation (2) by equation (1), we get
F' = 0.7 N
Thus, the new force is 0.7 N.
Chemical properties are observed when matter or substance changes to form a new kind of matter or substance.
<h3>What is Chemical properties?</h3>
This is the term used to describe the ability of a substance or matter to react and form new substance. Chemical properties are used during chemical reaction to be able to control the reaction and get a certain product
we can conclude that chemical properties are observes during chemical reaction to ascertain the new substance or matter to be formed
Read more on chemical properties here: brainly.com/question/17436856
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