A student makes a model of a galaxy by gluing glitter pieces on paper, as shown. Which galaxy is shown by the student's model, and why?
A. Elliptical galaxy the stars do not creates galaxy resembling disk
B. Irregular galaxy the stars do not crest a galaxy with a define shape
C. Spiral galaxy the stars are grouped together in the center of the galaxy
D. Spiral galaxy the stars are farther apart along the edges of the galaxy

Complete the statement about memory improvement. ( )involves organizing and breaking down information into easier groups to expand capacity. rehearsal is the verbal repetition of information. these techniques are especially important for the improvement of ( ) memory.

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?

Arefrigerator uses r-134a as the working fluid and operates on the ideal vapor-compression refrigeration cycle except for the compression process. the refrigerant enters the evaporator at 120 kpa with a quality of 34 percent and leaves the compressor at 70°c. if the compressor consumes 450 w of power, determine (a) the mass flow rate of the refrigerant, (b) the condenser pressure, and (c) the cop of the refrigerator. (0.00644 kg/s, 800 kpa, 2.03)