Why will a struck tuning fork sound louder when it is held against a table?
What will be an ideal response?
Answer: When the vibrating tuning fork is held against a table, the large area of the table is forced into vibration. Compared with the surface area of the bare tines of a tuning fork, the larger area of the table sets a greater amount of air into vibration, which in effect amplifies the sound of the vibrating tuning fork.
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A copper sphere has a radius of 2.50 m under normal room pressure of 1.0 × 105 N/m2. If we increase the pressure on this sphere to 10 times the normal room pressure, what is the change in its volume? The bulk modulus for copper is 1.4 × 1011 Pa
What will be an ideal response?
In an isochoric process, there is no change in
A) pressure. B) temperature. C) volume. D) internal energy. E) heat.
On average, how fast do the plates move on the Earth?
A) a few millimeters per century B) about 1 mile per hour C) a few centimeters per year D) a few kilometers per year
While watching a star, you see it moves 15 degrees across the sky. How long have you been watching it?
A) 1 hour B) 3 hours C) 15 minutes D) 15 seconds E) 1 minute