If 50 kJ of heat flows into a system and 35 kJ of work is done by the system, then what is the change in internal energy?
A. 85 kJ
B. 70 kJ
C. 65 kJ
D. 15 kJ
E. 10 kJ
D. 15 kJ
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Indicate whether the statement is true or false
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Two pairs of sunspots appear similar, but if one was observed in 1990, and the next in 2002, we would note what difference?
What will be an ideal response?
An electron moving perpendicular to a uniform magnetic field of 3.2 × 10-2 T moves in a circle of radius 0.40 cm. How fast is this electron moving? (e = 1.60 × 10-19 C, melectron = 9.11 × 10-31kg)
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