In a mass spectrometer, a single-charged particle (charge e) has a speed of 1.0 × 106 m/s and enters a uniform magnetic field of 0.20 T. The radius of the circular orbit is 0.020 m. What is the mass of the particle?
A)
3.2 × 10-28 kg
B)
6.4 × 10-28 kg
C)
1.7 × 10-27 kg
D)
4.5 × 10-27 kg
E)
3.1 × 10-31 kg
B
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The interstate on-ramp is 1.5 km West of your home, and on leaving for grandmother’s house you are only able to accomplish an average velocity of 12 km/hr between your home and the on-ramp. At the onramp, you wait for traffic, for 2.0 min – and then are able to proceed toward grandmother’s house. If you wish to arrive there, which is 15 km South of the onramp, over a river and through some woods, in a total elapsed time of 25.0 minutes, what average speed must you maintain on the interstate highway?
A. 51 km/hr B. 67 km/hr C. 36 km/hr D. none of these.
Water boils in the mountains at
A) a higher temperature than at sea level. B) a lower temperature than at sea level. C) the same temperature as at sea level.
Suppose we put a 0.3-kg hunk of ice at 0°C into an insulating thermos bottle filled with 1000 g of water at 20°C. What will be the system’s final temperature?
A. Below 0°C B. Almost exactly 0°C C. Somewhat above 0°C, but below 10°C D. Very roughly 10°C E. Somewhat below 20°C, but above 10°C F. Almost exactly 20°C
A viscoelastic model of a solid with a parallel spring and dashpot is a _________solid.
Fill in the blank(s) with the appropriate word(s).