The Trifid Nebula is an example of a(n) ________ nebula
Fill in the blank(s) with correct word
emission
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A charged particle that is moving in a static uniform magnetic field
A) will always experience a magnetic force, regardless of its direction of motion. B) may experience a magnetic force which will cause its speed to change. C) may experience a magnetic force, but its speed will not change. D) may experience a magnetic force, but its direction of motion will not change. E) None of the above statements are true.
The force required to move a 50.0 kg object in a circle with radius 55.0 m at a constant speed of 2.60 m/s is
a. 0.0 N b. 6.1 N c. 0.12 N d. 2.36 N
A car travels in a flat circle of radius R. At a certain instant the velocity of the car is 24 m/s west, and the total acceleration of the car is 2.5 m/s2 53° north of west. Which of the following is correct?
a. R = 0.29 km, and the car's speed is increasing. b. R = 0.23 km, and the car's speed is decreasing. c. R = 0.23 km, and the car's speed is increasing. d. R = 0.29 km, and the car's speed is decreasing. e. R = 0.29 km, and the car's speed is constant.
We cannot see tidal forces or tidal heating; rather, we predict that they must occur based on the orbital characteristics of the moons. What observational evidence confirms that tidal heating is important on Io?
a. Io's surprisingly elliptical orbit b. active volcanoes on Io c. Io's unusual, egg-like shape d. the orbital resonance between Io, Europa, and Ganymede