The most common kinds of stars are low-luminosity stars
a. True
b. False
Indicate whether the statement is true or false
True
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To turn 50 grams of boiling water to steam requires
A) 50 calories. B) 500 calories C) 540 calories. D) more than 540 calories. E) none of the above
The electron gun in a television tube accelerates electrons (mass = 9.11 × 10^-31 kg, charge = 1.60 × 10^-19 C) from rest to 3.00 × 10^7 m/s within a distance of 2.00 cm. What electric field is required?
Determine the mass flow rate of R-134a required for steady state of the cross-flow heat exchanger shown. Air at 30ºC enters at a rate of 3.6 kg/s and leaves at 10ºC. The refrigerant enters at -10ºC, leaves at 5ºC, and has a specific heat of 2.1 kJ/kg?K.
Explain why leaves and plants are the colors they are, not black or white
What will be an ideal response?