Answer:
Explanation:
Metals are by far better conductors of electricity than most solids because individual atoms in a metal form a matrix which their outer electrons can move freely. These atoms form a "sea" of electrons that surrounds the positively charged atomic nuclei of the interacting metal ions.
Solids are usually rigid substances with their atoms in a fixed place unable to move freely.
Answer : The specific heat capacity of the alloy
Explanation :
In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.
where,
= specific heat of alloy = ?
= specific heat of water =
= mass of alloy = 21.6 g
= mass of water = 50.0 g
= final temperature of system =
= initial temperature of alloy =
= initial temperature of water =
Now put all the given values in the above formula, we get
Therefore, the specific heat capacity of the alloy
Models are very common. The ingredients list on a bottle of ketchup is a model of its contents, and margarine is a model of butter. A box score from a baseball game is a model of the actual event. A trial over an automobile accident is a model of the actual accident.
So in your problem the following would be the answer where as the swimmer has a velocity of 1.6m/s arrives at 40m point and the river is 80m wide os the following is the answer:
a.39.85 m/s
b.0.8m/s
c.26.6 degrees upstreem
d.50