When a surfer rides an ocean wave on her surfboard, she is actually riding on
A.a crest that is toppling over
B.a trough of the wave
C.the rest position of the wave
D.a region of rarefaction
Duplicate question; Same answer
a 50.0g silver spoon at 20.0c is placed in a cup of coffee at 90.0c. How much heat does the spoon absorb from the coffee to reach a temperature of 89.0c?
To calculate the amount of heat absorbed by the spoon, we can use the formula Q = mc∆T, where Q represents heat, m represents mass, c represents specific heat capacity, and ∆T represents the change in temperature.
First, let's find the change in temperature (∆T) of the spoon:
∆T = final temperature - initial temperature
∆T = 89.0°C - 20.0°C
∆T = 69.0°C
The mass of the spoon is given as 50.0g, and since silver is a relatively good conductor of heat, we can assume that the specific heat capacity (c) of the spoon is equal to the specific heat capacity of silver, which is 0.235 J/g°C.
Now we can calculate the amount of heat absorbed by the spoon by plugging the values into the formula:
Q = mc∆T
Q = (50.0g)(0.235 J/g°C)(69.0°C)
Q = 808.5 J
Therefore, the spoon absorbs approximately 808.5 J of heat from the coffee to reach a temperature of 89.0°C.