An astronaut is on a 100-m lifeline outside a spaceship, circling the ship with an angular speed of 0.100 rad/s. How far inward can she be pulled before the centripetal acceleration reaches 4g = 39.2 m/s2?
a. 50.0 m
c. 72.7 m
b. 70.6 m
d. 89.9 m
B
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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
Mutual gravitation is ____
a. a type of force that acts on an object moving at constant speed b. the acceleration of an object in the absence of a force c. a property of all matter in the universe d. the limit of gravitational force from one object to another e. a type of force that repels surrounding particles
Compound A is a liquid and compound B is a solid. Which statement is justified?
a. Compound A is covalent; compound B is ionic. b. Compound A is ionic; compound B is covalent. c. Compound A could be ionic or covalent; compound B is ionic. d. Compound A is covalent; compound B could be ionic or covalent.
The type of current supplied by a battery is __________
Fill in the blank(s) with correct word