中考物理實(shí)驗(yàn)試題

F

.

V

A

A__________W“測滑輪組機(jī)械效率”

h/cm

________如果將重為

組的機(jī)械效率應(yīng)在___________范圍內(nèi)．t/

________________________________________________________________________________________________________________________R

R _____AR____

_______________________________________________________________

_________________________________________________________________________________________________________________________________________________________________________________________________________________________

（南通）

_______

m/s__________________

________

=4

___________

通過風(fēng)力發(fā)電系統(tǒng)來為人類提供電能．風(fēng)力發(fā)電機(jī)中的葉片在風(fēng)力的推動下轉(zhuǎn)動，并帶動機(jī)頭發(fā)電機(jī)發(fā)電．風(fēng)力發(fā)電機(jī)是將——能轉(zhuǎn)化成——能的設(shè)備．某小型風(fēng)力發(fā)電機(jī)參數(shù)如右表所示，小明的父親想用它解電器供電，在選擇用電器時要注意的問題是：_________________________________________________________________________h

h________kg

_______________.b

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______

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__________ .

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.

_________ .

.

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______

A B

b

d

b.

形管兩邊液柱的高度幾乎不變化

.

出現(xiàn)這種情況的原因是：__________________________.d.

d

d.

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.

.

V

A

__________________

+

+

V A

.

.________________________________________________________________________________________________________________________.

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=

F

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______

______________________

_________________________________________

I

R

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b

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=

=

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l

m

/g

m1/g

m2g

g

。如圖

V

A

________________________________________________________________________________________________