A helium nucleus (charge = 2e, mass = 6.63 × 10^-27 kg) traveling at 6.20 × 10^5 m/s enters an electric field, traveling from point A, at a potential of 1.50 × 10^3 V, to point B, at 4.00 × 10^3 V. What is its speed at point B?
1.7.91 × 10^5 m/s
2.3.78 × 10^5 m/s
3.2.13 × 10^5 m/s
4.2.52 × 10^6 m/s
5.3.01 × 10^8 m/s
2
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Latent Heats: A 2294-kg sample of water at 0° C is cooled to -36°C, and freezes in the process. How much heat is liberated? For water LF = 334,000 J/kg and LV = 2.256 × 106 J/kg. The specific heat of ice is 2050 J/kg ? K.
A. 935,000 kJ B. 597,000 kJ C. 1,110,000 kJ D. 334,000 kJ
A beam of light with a frequency range of 3.01 × 1014 Hz - 6.10 × 1014 Hz is incident on a metal surface. If the work function of the metal surface is 2
20 eV, what is the range of frequencies in this beam of light that will be responsible for ejecting electrons from this metal surface? A) 1.12 × 1014 Hz - 5.31 × 1014 Hz B) 1.12 × 1014 Hz - 3.10 × 1014 Hz C) 3.01 × 1014 Hz - 6.10 × 1014 Hz D) 5.31 × 1014 Hz - 6.10 × 1014 Hz E) None
A muon formed high in the Earth's atmosphere travels at a speed 0.870c for a distance of 4.00 km before it decays. What is the muon's lifetime as measured in its reference frame?
a. 3.1E–5 s b. 7.6E–6 s c. 1.5E–5 s d. 5.1E–5 s e. 4.3E–5 s
The uppermost layer of the Earth's surface containing mineral and organic matter capable of supporting plants is
What will be an ideal response?