A proton is accelerated from rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it follows
A)
1.1 mm
B)
1.1 cm
C)
11 cm
D)
1.1 m
E)
11 m
B
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A planet is in orbit around the Sun with a period of 5 years. What is the semimajor axis of its orbit (average distance from the Sun) in AU? Use P2 = a3 to estimate.
A. 1.24 AU B. 8.65 AU C. 123 AU D. 25.0 AU E. 2.92 AU
If the presently accepted value of ?o = 0.3 (excluding dark energy) is indeed correct, then the universe will:
A) expand forever. B) expand to the critical size for the Steady State model, then become static. C) stop expanding in about forty billion years, to collapse into the next cosmic cycle. D) Two of the answers are correct. E) All of the above are correct.
A punster in the utility industry has referred to the burning of coal in the Cool Water plant of Southern California Edison as "immaculate combustion." Explain how serious he could have been by reference to Table 12.4 and Figure 12.17
What will be an ideal response?
Find the minimum diameter of a steel wire 18 m long that will stretch no more than 9 mm when a load of 380 kg is hung on the lower end. (Y steel = 2.0 × 10^11 N/m2)