If a hydrogen atom, originally in its ground state of energy –13.6 eV, absorbs a photon of energy 22.0 eV, what is the resulting kinetic energy of the electron if the proton has negligible kinetic energy?
a. Such a photon cannot be absorbed in this case.
b. 8.4 eV
c. 2.4 eV
d. 16.0 eV
B
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When an unstable Arsenic nucleus undergoes alpha decay, the nucleus formed is that of
a. Arsenic. b. Bromine. c. Germanium. d. Gallium. e. Selenium.
Two experiments are performed. In (A), an 18.0 N force pushes horizontally on a 2.00 kg block that then pushes on a 4.00 kg block. In (B), an 18.0 N force pushes on a 4.00 kg block that then pushes on a 2.00 kg block. Which statement is correct?
a. The acceleration is 3.00 m/s2 in both (A) and (B). b. The acceleration is 4.50 m/s2 in both (A) and (B). c. The acceleration is 6.00 m/s2 in both (A) and (B). d. The acceleration is 9.00 m/s2 in both (A) and (B). e. The 2.00 kg block has a 9.00 m/s2 acceleration. The 4.00 kg block has a 4.50 m/s2 acceleration.
The electrical conductivity of a metal is not proportional to which of the following?
(a) Free-electron density (b) Electron mobility (c) Electron charge (d) Atomic number
A coil of 160 turns and area 0.20 m2 is placed with its axis parallel to a magnetic field of initial magnitude 0.40 T
The magnetic field changes uniformly from 0.40 T in the +x direction to 0.40 T in the -x direction in 2.0 s. If the resistance of the coil is 16 ?, at what rate is power generated in the coil? A) 5.0 W B) 10 W C) 15 W D) 20 W E) 25 W