a) The one with the higher capacity will have smaller change in temperature
b) Yes, because the total energy is saved (enclosed) inside.
c) Heat from hot iron heats the water, then if there is still enough heat, the water can boil and evaporate
d) Q2+Q1=0, Q1 is for Iron and Q2 is for water
-C1M1(t-T1)=C2M2(t-T2)
C.
e) Closed system (isolated system) because the energy is transferred only between water and iron.
f) It would be smaller.
Note: <em>The question states the time to go upstream is a number of times (not explicitly written) the time to go downstream. We'll assume a general number N</em>
Answer:
Explanation:
<u>Relative Speed</u>
If a boat is going upstream against the water current, the true speed of motion is , being
the speed of the boat and
the speed of the water. If the boat is going downstream, the true speed becomes
.
The question states the time to go upstream is a number of times N (not explicitly written) the time to go downstream. The speed of an object is computed as
Where x is the distance traveled and t the time taken for that. The time can be computed by
If is the time for the upstream travel and
is the time for the downstream travel, then
Siince the same distance x= 10 miles is traveled in both cases:
Simplifying and rearrangling
Operating
Solving for
If N=3
We can use the required value of N to compute the speed of the boat as explained