<span>e=ca{\displaystyle e={\frac {c}{a}}}.</span>
You are walking on a beach and find a mystery piece of metal. You take it back to your lab and measure its mass to be 0.5 kg. In
1 answer:
D) Silver
Explanation:
Given parameters:
Mass of metal = 0.5kg
temperature change = 1K
Quantity of heat = 115J
Unknown;
Identity of the metal = ?
Solution:
We first find the specific heat of the unknown metal and compare with the table of specific heat of metals.
C =
C = = 230JKg⁻¹K⁻¹
Comparing this value with the table shows that the metal is silver.
Learn more:
Specific heat brainly.com/question/7210400
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AS
work done =W = F.d = F d cosФ (Ф is angle between force F and displacement d) If a body/object is moving on a smooth surface (friction-less surface ) .There is no force acting on that body. F=0 so W=FdcosФ= (0)dcosФ ⇒ W=0
Now if a body is facing some amount of force but under the action of force there is no displacement covered. d=0 so W =FdcosФ= F(0)cosФ ⇒W=0
example: A person is applying a force on rigid wall but wall remains at rest there is no displacement occurs in wall.
The third term upon which work done dependent is angle between force and displacement i.e Ф. If Ф=90° then W= FdcosФ= Fdcos90⇒ W=0 ( as cos 90°=0)
