The Tully-Fisher relation exists between the galaxy's luminosity and its

A) age. B) mass. C) size. D) rotation. E) color.


D

Physics & Space Science

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A dispersion-strengthened cutting tool will be made of a 80 vol % commercial purity nickel matrix and 20 vol % synthetic diamond. Nickel has an elastic modulus, given in Table 6.1, of 200 GPa and a tensile fracture strength of 400 MPa, and synthetic diamond has an elastic modulus of 900 GPa and a tensile fracture strength of 1000 MPa. Estimate the tensile strength and elastic modulus of this alloy.

What will be an ideal response?

Physics & Space Science

Which of the following forms of electromagnetic radiation has a longer wavelength than visible light?

A) Gamma rays B) Ultraviolet radiation C) Infrared radiation D) X-rays

Physics & Space Science

Find the average density of a red giant star with a mass of 20 × 1030 kg (approximately 10 solar masses) and a radius of 150 × 109 m (equal to the Earth's distance from the Sun).

A. 1.41 × 10?4 kg/m3 B. 0.007 kg/m3 C. 1.41 kg/m3 D. 710 kg/m3 E. 1.41 × 10?3 kg/m3

Physics & Space Science

It is common to illustrate the density of nuclear matter be discussing the mass of a teaspoon of nuclear material. What do nuclear densities imply for the mass of a teaspoon (5 cm3) of nuclear material? You may wish to use the relationship r=(1.2 fm)A1/3 together with the mass of a proton, 1.67 x 10-27 kg, to estimate.

A. 3.8 x 1011 kg B. 9.6 x 1011 kg C. 1.53 x 1012 kg D. 1.15 x 1012 kg

Physics & Space Science