Can you think of any refinements to the model for PCM thermal storage as shown schematically in Figure 10-27?
What will be an ideal response?
This is essentially a heat exchanger and so refinements could be made to the
pattern of the tubes and also the length of the tubes. You can probably think of
other variations
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If ? = 40° and the tension in string 2 is 30 N, determine M.
A. 3.4 kg B. 3.6 kg C. 2.6 kg D. 4.9 kg E. 7.5 kg
The zodiac is tilted by 23.5 degrees relative to the Celestial Equator.
Answer the following statement true (T) or false (F)
A toy rocket, launched from the ground, rises vertically with an acceleration of 20 m/s2 for 6.0 s until its motor stops. Disregarding any air resistance, what maximum height above the ground will the rocket achieve?
a. 1.1 km b. 0.73 km c. 1.9 km d. 0.39 km e. 1.5 km
Earlier than a certain time, the laws of modern physics cannot describe the universe adequately. Roughly when is that time?
A: 10^43 seconds B: 10^33 seconds C: 1 minute D: 3 minutes E: 1 million years