The characteristic peaks in an x-ray spectrum of an atom occur because
a. of photon absorption.
b. of the photoelectric effect.
c. electrons in the atom make transitions to lower energy levels.
d. of the uncertainty principle.
e. of rapid deceleration of the bombarding electrons.
c
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Mass on a Spring: A 2.0 kg box is traveling at 5.0 m/s on a smooth horizontal surface when it collides with and sticks to a stationary 6.0 kg box. The larger box is attached to an ideal spring of force constant (spring constant) 150 N/m, as shown in the figure. Find (a) the amplitude of the resulting oscillations of this system, (b) the frequency of the oscillations and (c) the period of the oscillations.
What will be an ideal response?
A wheel (radius = 12 cm) is mounted on a frictionless, horizontal axle that is perpendicular to the wheel and passes through the center of mass of the wheel. A light cord wrapped around the wheel supports a 0.40-kg object. If released from rest with the string taut, the object is observed to fall with a downward acceleration of 3.0 m/s2. What is the rotational inertia (of the wheel) about the given axle?
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A mosquito flying at 3 m/s encounters a 3-m/s breeze blowing in the opposite direction, which gives it a resulting speed over the ground of
A) 0 m/s. B) 3 m/s. C) 4 m/s. D) 6 m/s.
Give the dimensions and shape of the Galactic disk
What will be an ideal response?