In general, which things below are affected by a magnetic field?
A) charged particles or magnetized materials (such as iron)
B) rocks of all types
C) iron-bearing minerals only
D) bases and liquids
A
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____ are star-like objects that contain less than 0.08 solar masses an will never raise their core temperatures high enough that the proton-proton chain can begin. Other minor fusion reactions do occur in these objects. They fall in a gap between the low-mass M dwarf stars and the massive planets in which nuclear fusion never occurs
a. Brown dwarfs
b. Herbig-Haro objects
c. Bok globules
d. T-Tauri star
e. Main sequence stars
An athlete participates in a discus throw competition during an Olympiad that takes place in a city where acceleration due to gravity is 9.80 m/s2. He throws the discus with an initial velocity of 20.0 m/s at an angle of 30.0° above the horizontal
Neglecting the height of the discus at the point of release, what is the range of the discus? A) 35.3 m B) 20.4 m C) 40.0 m D) 60.0 m E) 50.0 m
How many atoms are there in the width of a human hair?
A. 25 B. 125,000 c. 273,000,000,000 D. 6x10^23
Daily afternoon thunderstorms along the Gulf Coast are most likely caused by a
A) continental tropical air mass. B) continental polar air mass. C) maritime tropical air mass. D) maritime polar air mass.