The type of EM wave having the highest frequency is __________
Fill in the blank(s) with correct word
gamma radiation
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T Tauri stars are post-main-sequence stars
Indicate whether the statement is true or false
What happens to the planets in a galaxy when that galaxy collides with another galaxy?
a) They are pulled out of their orbits by the tidal forces of the intruding galaxy. b) Smaller stars collide with each other, forming more massive stars which swallow the planets. c) Nothing, because the spaces between stellar systems in a galaxyis much larger thantheir size. d) They accrete a whole lot of new matter and become stars themselves. e) They ignite completely and explode violently.
Show that the effective conductance. A1 F 1-2 for two black parallel plates of equal area connected by re-radiating walls at a constant temperature is
GIVEN
• Two black parallel planes of equal area connected by re-radiating walls at a constant temperature
FIND
• Show that
SKETCH
A bucket of water with total mass 23 kg is attached to a rope, which in turn is wound around a 0.050-m radius cylinder at the top of a well. The bucket is raised to the top of the well and released. The bucket is moving with a speed of 6.0 m/s upon hitting the water surface in the well. What is the angular speed of the cylinder at this instant?
a. 39 rad/s c. 120 rad/s b. 79 rad/s d. 160 rad/s