In the context of the Doppler effect, which of the following is a difference between a blueshift and a redshift?
A) Unlike a redshift, a blueshift is caused by a velocity of recession.
B) Unlike a blueshift, a redshift is based on the Hubble's law.
C) Unlike a redshift, a blueshift is a shift toward shorter wavelengths.
D) Unlike a blueshift, a redshift is based on a light source moving closer to an object.
C
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The mass density of platinum is 21.4 × 103 kg/m3. A platinum wire with a radius of 0.500 mm, 1.20 m long, fixed at both ends has a frequency of vibration for its third harmonic equal to 512 Hz. What is the tension in the wire?
A) 4.00 kN B) 2.00 kN C) 2.82 kN D) 1.41 kN E) 1.00 kN
If you double the radius of a sphere, its volume increases by what factor?
A. 2 B. 4 C. 6 D. 8
A child and an adult are walking. Their legs swing like physical pendulums and both swing through the same maximum angle. The adult is 1.5 times as tall as the child, and all their dimensions are scaled proportionately
They also have the same mass per unit volume. If the walking speed of the adult is 1.3 m/s, what is the walking speed of the child?
What observation of extrasolar planetary systems provides strong confirmation of the condensation theory?
What will be an ideal response?