A temperature change of 20 C° corresponds to a temperature change of
A) 68. F°.
B) 11.1 F°.
C) 36. F°.
D) 42. F°.
E) 20. F°.
C
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Latent Heats: A 45.0-kg sample of ice is at 0.00°C. How much heat is needed to melt it? For water LF = 334,000 J/kg and LV = 2.256 × 106 J/kg.
A. 1.50 × 104 kJ B. 4.10 × 106 kJ C. 0.00 kJ D. 1.02 × 105 kJ
A 0.60-kg object is suspended from the ceiling at the end of a 2.0-m string. When pulled to the side and released, it has a speed of 4.0 m/s at the lowest point of its path. What maximum angle does the string make with the vertical as the object swings up?
a. 61° b. 54° c. 69° d. 77° e. 47°
If I = 2.0 mA and the potential difference, VA – VB = +30 V in the circuit segment shown, determine the charge and polarity of the capacitor
a.
1.5 mC, left plate is positive
b.
1.5 mC, right plate is positive
c.
0.45 mC, left plate is positive
d.
0.45 mC, right plate is positive
Enforce laws
What will be an ideal response?