A charged particle is moving perpendicular to a uniform magnetic field, the radius of its motion given by r = mv/Bq. The speed of the particle is tripled. The particle’s time to complete one loop
1.is divided by three.
2.triples.
3.stays the same.
4.changes in ways which cannot be determined with the information given.
3
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_________ occurs when light travels out of a gravitational field, loses energy, and its wavelength grows longer
a. A gravitational blue shift b. The solar wind c. A gravitational redshift d. A X-ray burst e. A pulsar wind
Process of Science: How can we test hypotheses about something that is postulated to exist in the past but that no longer exists today, such as free-flowing water on Mars?
What will be an ideal response?
A 0.0040-kg lead bullet is traveling at a speed of 220 m/s when it embeds in a block of ice at 0°C. If all the heat generated goes into melting ice, what quantity of ice is melted? (Lf = 80 kcal/kg, the specific heat of lead = 0.03 kcal/kg/°C, and 1 kcal = 4 186 J)
a. 1.6E–2 kg b. 5.8E–4 kg c. 4.6E–3 kg d. 2.9E–4 kg e. 1.9E–5 kg
The kinetic energy of a pendulum is least
a. when its potential energy is least. b. at the top of its swing. c. at the bottom of its swing. d. when its total energy is greatest.