This diagram shows several stages in a computer simulation of a collision between two galaxies. What is being simulated?
A) Two spiral galaxies merge to become an elliptical galaxy surrounded by debris.
B) Two elliptical galaxies merge to become a spiral galaxy.
C) Two galaxies collide, sending their stars flying off into space while their centers merge to become a supermassive black hole.
D) Two spiral galaxies collide, ultimately merging to make a larger spiral galaxy.
A) Two spiral galaxies merge to become an elliptical galaxy surrounded by debris.
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Which of the following speeds is greatest? (2.54 cm = 1.00 in.)
A) 10 km/h B) 10 m/s C) 10 ft/s D) 10 mi/h E) 10 yd/s
A wire (mass = 50 g, length = 40 cm) is suspended horizontally by two vertical wires which conduct a current I = 8.0 A, as shown in the figure. The magnetic field in the region is into the paper and has a magnitude of 60 mT. What is the tension in either wire?
a.
0.15 N
b.
0.68 N
c.
0.30 N
d.
0.34 N
e.
0.10 N
Briefly describe the steps in the big bang that provided the protons, neutrons, and electrons necessary for nucleosynthesis – the building of complex atoms
What will be an ideal response?
Plane waves of ultrasound, f = 51.0 kHz, impinge on a flat plane with a 1.00 cm-wide slit. What is the total angular width (2?) of diffracted sound waves when the speed of sound in air is 340 m/sec
a. 167° b. 83.6° c. 19.5° d. 41.8° e. 0.11°