As shown in the above spectra, which is taken at two different times, a ________ is concluded
a. visual binary
b. eclipsing binary
c. spectroscopic binary
d. single star
C
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Dielectrics: A 15-?F capacitor is connected to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric, having a dielectric constant of 5.0, is inserted between the plates and completely fills the space between them.(a) What is the capacitance of the capacitor after the slab is inserted?(b) What is the potential difference across the capacitor with the dielectric inserted.
Fill in the blank(s) with the appropriate word(s).
A jack system will increase the potential energy of a heavy load by 1000 J with a work input of 2000 J. The efficiency of the jack system is
A) 10%. B) 20%. C) 50%. D) 80%. E) need more information
An electron is confined to a one-dimensional box of width 0.10 nm, about the size of an atom. What is its energy, in eV, in the ground state?
What will be an ideal response?
About 15% by mass of Earth's core is composed of the element(s)
a. iron b. nickel c. oxygen. d. silicon. e. iron and nickel.