Two identical charges are separated by a distance d. If the distance between them is increased to 3d, what will happen to the fo
2 answers:
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The question is: You have 500g of ethyl alcohol at a temperature of -40 ° C. How much heat is needed to transform it into steam at a temperature of 150ºC?
Answer: 233700 J heat is needed to transform ethyl alcohol into steam at a temperature of to
.
Explanation:
Given: Mass = 500 g
Initial temperature =
Final temperature =
The standard value of specific heat of ethyl alcohol is .
Formula used to calculate the heat energy is as follows.
where,
q = heat energy
m = mass of substance
C = specific heat
= initial temperature
= final temperature
Substitute the values into above formula as follows.
Thus, we can conclude that 233700 J heat is needed to transform ethyl alcohol into steam at a temperature of to
.
Answer:
Therefore it is save to carry a 62kg adult
Explanation:
From the question we are told that:
Mass
Height of supporting Rock
Length of Board
Mass of board
Mass of adult
Generally the moment of balance about wedge part about is mathematically given by
where
therefore
if N=0 at fallen person
Therefore it is save to carry a 62kg adult