What are the main constituents of the jovian planets?
A) rocky minerals and water, as on Earth
B) hydrogen and helium
C) ammonia and methane
D) ammonia and water
E) nitrogen and methane
B
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The flatness problem and horizon problem
a. are solved if there was a sudden inflation of the Universe at time before recombination occurred. b. show that the Universe can be described as static and unchanging. c. show that dark matter must be a small fraction of the total mass of the Universe. d. imply that the Universe was once much colder than it is now. e. imply that the inflationary theory is incorrect.
Standing Waves on a String: A string of length 2.5 m is fixed at both ends. When the string vibrates at a frequency of 85 Hz, a standing wave with five loops is formed.(a) Determine the distance between two adjacent nodes.(b) Determine the wavelength of the waves that travel on the string.(c) Determine the speed of traveling waves on this string.(d) Determine the fundamental frequency of this string.
What will be an ideal response?
Two capacitors with capacitances of 2.0 ?F and 0.40 ?F, respectively, are connected in series. The system is connected to a 50-V battery. What electrical potential energy is stored in the 2.0-?F capacitor?
a. 2.5E–3 J b. 5.0E–4 J c. 8.3E–5 J d. 6.9E–5 J e. 1.4E–5 J
The amount of discharge at which the stream is full is called
What will be an ideal response?