Answer:
Options A and D are correct
Explanation:
The thermal conductivity of a metal is the property of a metal to allow heat flow through it. conductivity is higher in conductors and low in insulators. Thermal conductivity is high in metals due to the metallic bonds that exist in metals and the presence of free electrons within the metal which allow easy flow of heat from one atom to another.From the problem the rod which contains freer electrons will allow more heat to flow easily hence have a higher thermal conductivity.
Thermal conductivity has the formula below;
- k is thermal conductivity,
- A is cross sectional area
- Q is quantity of heat transferred to material.
- ΔT is temperature change.
From the above equation we can see that thermal conductivity is inversely proportional to A and directly proportional to L. This mean the rod with less area will have a higher thermal conductivity and the rod with a higher length will have higher k. Hence option C i wrong and option D is correct.
For specific heat, its very much different from thermal conductivity. Specific heat is the ability of a material to hold heat while thermal conductivity is the ability of heat to flow through a material.
Answer:
The description including its issue is summarized throughout the clarification portion below.
Explanation:
- Speed would be a measurement of size. Which has only significance and therefore no path or guidance. Student says acceleration of -10m/s, therefore this assumption is incorrect because this same negative correlation indicates the path.
- In reality, this same participant defined the speed (which seems to have two very different motion of an object).
Answer:
Explanation:
Given that:
thickness of the metal strip, 
width of the metal strip, 
magnitude of the perpendicular magnetic field, 
current through the strip, 
charge density, 
Hall voltage is a transverse voltage given by:
putting the respective values
Note:
V = E d is used when a charge is moved in a uniform electric field between the two oppositely charged plates, it can't be used here because it is the case of Hall effect where the small voltage develops transverse to the direction of current flow.
So we want to know what measurement do we need to make in order to determine what equipment can the boat carry. The boat overall length dictates what equipment should a boat have to comply with federal and state law. So the correct answer is the LENGTH measurement.
Momentum= mass*velocity thus if you keep velocity constant an increase in mass increases momentum so the heavier object (assuming constant gravity) has a higher momentum than a lighter object
