Due to the extremely rapid orbital velocities of material near the center of many galaxies, these galaxies are believed to contain ____________________ at their centers

Fill in the blank(s) with correct word


a supermassive black hole

Physics & Space Science

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Which statement about stellar populations is correct?

a. Population I stars are found in the disk and halo; Population II stars are found in the bulge. b. Population I stars are found in the halo; Population II stars are found in the disk and bulge. c. Population I stars are found in the disk; Population II stars are found in the bulge and halo. d. Population II stars are found in the disk; Population I stars are found in the bulge and halo. e. Population I stars are found in the bulge; Population II stars are found in the disk and halo.

Physics & Space Science

A 60.0 cm long organ pipe is filled with air and is open at both ends. The velocity of sound in air at 0is 331 m/s. What is the wavelength of the fundamental mode?

A. 115 cm B. 120 cm C. 131 cm D. 142 cm E. 167 cm

Physics & Space Science

Describe some of the early theories for why the Sun shines and why they are no longer accepted as viable

What will be an ideal response?

Physics & Space Science

How would the data be influenced by an increase of friction in the pulley?

Physics & Space Science