Why are planets and stars approximately spherical, whereas asteroids and meteorites are shaped like ordinary rocks?
What will be an ideal response?
In large bodies, the gravitational forces are much larger than the elastic forces, so the body takes on a spherical shape (except for a slight oblateness due to rotation,) whereas in small bodies the elastic forces are much larger, so the bodies retain their shape.
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How many types of quarks are there?
A) 3 B) 6 C) 16 D) 24 E) 2
What value of n corresponds to a wavelength of 922.7 nm in the Paschen series?
A) 3 B) 15 C) 9 D) 5 E) 7
Which of the following thought of the idea that the intensity of a matter wave represents the probability that an interaction will occur?
A) Born B) Schroedinger C) Planck D) de Broglie E) Einstein
A student wants to establish a standing wave on a wire 1.8 m long clamped at both ends. The wave speed is 540 m/s. What is the minimum frequency she should apply to set up standing waves?