The density of a certain metal solid is 6.5 × 10^3 kg/m3, and its Young's modulus is 10.0 × 10^10 N/m2 . What is the speed of sound in this metal?
a. 8.1E+1 m/s
b. 1.2E+3 m/s
c. 3.9E+3 m/s
d. 1.2E+5 m/s
e. 8.1E+1 m/s
c
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The ionization energy for the hydrogen atom is 13.6 eV. What is the energy of a photon that is emitted as a hydrogen atom makes a transition between the n = 6 and n = 4 states?
a. 1.13 eV b. 0.47 eV c. 0.09 eV d. 3.40 eV e. 6.80 eV
A doubly charged ion with velocity 6.9 × 106 m/s moves in a path of radius 30 cm in a magnetic field of 0.80 T in a mass spectrometer. What is the mass of this ion?
A) 11 × 10-27 kg B) 6.7 × 10-27 kg C) 4.5 × 10-27 kg D) 3.3 × 10-27 kg E) 8.2 × 10-27 kg
Slanting Surfaces Without Friction: A slanted roof rises at 35° above the horizontal, and the straight-line distance from the top of the roof to the bottom edge is 4.5 m. The roof is covered with ice, so it offers no friction to objects sliding on it. A piece of ice at the top suddenly breaks loose and begins to slide down from rest.(a) How long will it take for the ice to reach the bottom edge of the roof?(b) How fast will the ice be traveling just as it reaches the bottom edge?
What will be an ideal response?
A Hooke's law spring is mounted horizontally over a frictionless surface. The spring is then compressed a distance d and is used to launch a mass m along the frictionless surface. What compression of the spring would result in the mass attaining 4 times the speed received in the situation described here?
a. 2.00d b. 0.50d c. 4.00d d. 16.00d