Why would galaxies colliding in a small cluster tend to stick together, while galaxies in a large cluster tend to pass through each other?

What will be an ideal response?


In a small cluster the lower mass means there is a smaller gravitational force pulling the galaxies together, which results in a lower collision speed. The greater mass in a large cluster results in a higher collision speed—high enough that the individual galaxies don't slow down enough to merge.

Physics & Space Science

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a. infrared waves b. microwaves c. radio waves d. ultraviolet light

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A principle difference between an MHD generator and a conventional generator is that the MHD generator

A) has no moving parts. B) operates more efficiently at high temperatures. C) both of these D) neither of these

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When an object is spinning in place, it is experiencing:

a. projectile motion. b. circular motion. c. rotational motion. d. vertical motion. e. orbiting motion.

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X-rays are produced using a potential difference of V. The spectrum of wavelengths is found to contain

A. a single wavelength. B. all wavelengths from zero up to a maximum. C. all wavelengths from a minimum to a maximum. D. only discrete wavelengths.

Physics & Space Science