Which word is the object of 'it takes'? 'time' or 'a wave crest'?
The basic features include a crest, a trough, a height, a wave length, and a period (which is the time IT TAKES a wave crest to travel one wave length).
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Corrections · 5
1
Which word is the object of 'it takes'? 'time' or 'a wave crest'?
The basic features include a crest, a trough, a height, a wave length, and a period (which is the time IT TAKES a wave crest to travel one wave length).I'm sure one of our highschool English teachers could explain this better but I'll give it a stab (grammar has never been my strong point).
IT in this case is time, or more precisely the duration there of, when talking about an action. eg: it takes 3 hours to write an essay. As opposed to it lasts, which is the duration of an objects life. eg, a pair of jeans lasts me 10 years.
take- verb
last- object
hope this clears it up a bit.
Chris
0
wave crest speed (Length/Time = velocity =m /s) takes(equals) one period (1/Time = 1/s) to travel one wavelength (Length = meters). Namely v = I/t X l, or,
v = l/t (1)
from which one gets l=vt (2), t=l/v (3).
v (equ 1), or l (equ 2), or t (equ 3) can be the object. In which case the predicates are on the right hand sides of these equations.
0
"time" is the direct object.
The direct object becomes clearer if you rearrange the sentence:
"It takes TIME FOR a wave crest to travel one wavelength"
The "for" was elided in the original.
Hope that helps.
0
原来您是发到小作文里了，我还在问题页面里找呢，哈哈。。非常感谢
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