Force on a Moving Charge: Three particles travel through a region of space where the magnetic field is out of the page, as shown in the figure. What are the signs of the charges of these three particles?
A. 1 is neutral, 2 is negative, and 3 is positive.
B. 1 is neutral, 2 is positive, and 3 is negative.
C. 1 is positive, 2 is neutral, and 3 is negative.
D. 1 is positive, 2 is negative, and 3 is neutral.
E. 1 is negative, 2 is neutral, and 3 is positive.
Answer: E
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Carnot Engine: A real (non-Carnot) heat engine, operating between heat reservoirs at temperatures of 450 K and 270 K, performs 3.3 kJ of net work, and rejects 8.2 kJ of heat in a single cycle.(a) What is the thermal efficiency of this heat engine?(b) What is the maximum efficiency it could possibly have?
Fill in the blank(s) with the appropriate word(s).
Circular Motion of Charges: A proton, starting from rest, accelerates through a potential difference of 1.0 kV and then moves into a magnetic field of 0.040 T at a right angle to the field. What is the radius of the proton's resulting orbit? (e = 1.60 × 10-19 C, mproton = 1.67 × 10-27 kg)
A. 0.080 m B. 0.11 m C. 0.14 m D. 0.17 m
A hydrogen atom is in the 6h state. Which of the following could be an orbital quantum number?
A) 5 B) 6 C) 7 D) 8 E) 9
The original substances in a chemical reaction are called the ______________
Fill in the blank(s) with correct word