An electron is released from rest at the negative plate of a parallel plate capacitor. If the distance between the plates is 5 mm and the potential difference across the plates is 5 V, with what velocity does the electron hit the positive plate? (me = 9.1 × 10?31 kg, qe = 1.6 × 10?19 C.)
What will be an ideal response?
1.33 × 106 m/s
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Ball A is thrown upward with a velocity of 19.6 m/s. Two seconds later ball B is thrown upward with a velocity of 9.8 m/s. Which ball is first to return to the thrower's hand?
A. A will arrive first B. B will arrive first C. A and B will arrive at the same time
Which of the following has been established through helioseismology observations?
A) The Sun's magnetic field is generated by the dynamo effect at the bottom of the convection zone deep under the photosphere. B) Magnetic fields are observed on Earth because of the presence of an ionized atmosphere. C) When seen through the naked eye, prominences look black because of emission in the three hydrogen Lyman series lines. D) Solar flares are found to occur in regions where identically directed magnetic fields meet.
A photon is
A) a high-energy electromagnetic wave. B) an electron that has been ejected from a metal surface by electromagnetic radiation. C) a particle-like quantum of radiation. D) one of the two types of nuclear particles. E) the "anti-particle" to the electron.
During a nuclear reaction, the particles involved lose 4.8 × 10-28 kg of mass. How many joules of energy are released by this reaction? (c = 3.00 × 108 m/s)
A) 4.3 × 10-11 J B) 1.4 × 10-19 J C) 1.6 × 10-36 J D) 2.1 × 10-40 J E) 5.3 × 10-45 J