Answer:
a. The one with the lesser mass.
Explanation:
Since , both are made of the same material , they will have same specific heat . On physical contact , heat will be exchanged between them with heat flowing from body at higher temperature to one at lower temperature . Amount of heat lost by one will be equal to amount of heat gained .
So temperature change will take place in both of them but they will not be same . Body of higher mass will undergo lesser change in temperature because of the following relation
Q = mcΔT
ΔT = Q / mc
ΔT ∝ 1 / m
change in temperature will be inversely proportional to mass of object if Q or heat exchanged is constant .
<span>What you need to do while answering this questions, is ask yourself what has cells - only if a thing has cells can you see those cells under a microscope. Objects of animal and plant origin have cells, so blood, plant and cork (made of tree bark) can have cells, and a box too, if it's made of wood. So we can''t exclude any answers based on this. We must then know the story of Robert Hook - and it was in fact a cork. He did this discovery around 1655. At the time his main interest was the microscope rather than the cork, and he used to cork to demonstrate the function of the microscope. The correct answer is CORK.</span>
C) After reacting, each ion has a stable octet.
Explanation:
When Na reacts with chlorine gas to form the ionic compound NaCl, after the reaction, each ion has a stable octet.
- The driving force for every reaction is the tendency of the atoms to have completely filled outer energy levels like the noble gases.
- To achieve this configuration, an atom may lose or gain or share electrons.
- In this way, their shells become completely filled and they attain stability.
- In the reaction between Na and Cl, Na, a metal loses an electron. Na then will have a configuration similar to that of Ne, a noble gas.
- The electron is then gained by the chlorine atom and it mimics an argon atom.
Learn more:
Ionic bond brainly.com/question/6071838
#learnwithBrainly
Answer:
je sais pas ;#,#^#,#;'sydndgdbdhx
To solve this problem we will use the two principles that are visible according to the phenomena described in the problem: Heat transfer by conductivity and Heat transfer by convection.
This thermal transfer will be equivalent and with it we can find the value asked.
<em>Note: We will assume that the temperature value at the plate surface is: 60 ° C (For the given value of 650 50)</em>
For Thermal Transfer by Conduction
Where,
k = Thermal conductivity
A = Cross-sectional Area
= Temperature of the bottom surface
= Temperature of the top surface
L = Length
Replacing we have that
For Thermal Transfer by Convection
Where,
h = Convection heat transfer coefficient
= Surrounding temperature
A = Surface Area
Replacing we have that
Since the rate of heat transfer by convection is equal to that given by conduction we have to:
It is stated that the typical values of forced convection of gases lies in the range of . The obtained value is reasonable for forced convection of air.