Two forces act on a 8.50-kg object. One of the forces is 14.0 N. If the object accelerates at 3.50 m/s2, what is the greatest possible magnitude of the other force?
a. 1.0 N
b. 15.8 N
c. 43.8 N
d. 26.3 N
e. 73.5 N
c
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Ultraluminous radio sources associated with small visible-light objects are called _______________
Fill in the blank(s) with correct word
Which of the following statements about thermal radiation is always true?
A) A hot object emits more x-rays than a cool object. B) A hot object emits more radio waves than a cool object. C) A hot object emits more total radiation than a cool object. D) A hot object emits more total radiation per unit surface area than a cool object. E) A hot object emits less total radiation than a cool object.
Convection currents in the air near a seashore are produced by
A) shifting winds. B) unequal heating of land and water. C) varying temperatures. D) none of the above
Discuss how astronomers know that our galaxy contains spiral arms in its disk
What will be an ideal response?