Answer:
the final temperature = 74.33°C
Explanation:
Using the expression Q = mcΔT for the heat transfer and the change in temperature .
Here ;
Q = heat transfer
m = mass of substance
c = specific heat
ΔT = the change in temperature
The heat Q required to change the phase of a sample mass m is:
Q = m
where;
is the latent heat of vaporization.
From the question ;
Let M represent the mass of the coffee that remains after evaporation is:
ΔT =
where;
m = 2.50 g
M = (240 - 2.50) g = 237.5 g
= 539 kcal/kg
c = 1.00kcal/kg. °C
ΔT =
ΔT = 5.67°C
The final temperature of the coffee is:
ΔT
where ;
= initial temperature = 80 °C
= (80 - 5.67)°C
= 74.33°C
Thus; the final temperature = 74.33°C
The orbit of a space shuttle is surprisingly like an apple falling from a tree to earth. The space shuttle is simply moving so fast that the path of its fall is an orbit around our planet. Which of Newton’s laws helps explain the orbit of a space shuttle around earth and the orbit of earth around the sun
the answer is an anteater
Thank you for posting your question here. Below is the solution:
fbeat = (f' - f) / 2
<span>then </span>
<span>f' = 2 fbeat + f = 4.126 Hz </span>
<span>also </span>
<span>f' = f vs / (vs - v) </span>
<span>then </span>
<span>v = (f' - f) vs / f' </span>
<span>v = (4.126 - 4)*340 / 4.126 = 10.383 m/s</span>
Conductor and electrons maybe hope it helps a lil bit have a good day