1966-02-24 — Page 7

日四廿月二年六六九一層公年五十五國民重中

生物科

(八)

徐錫轤·

Answers to exercise 7:

三張皮

WAH KIU YAT PO

CITY

救]

華僑教育

= 62.5+ 68.75

Un = 83.53x 25+ 62.755 €,

英中会題試題預習專欄

EL3125磅)

中中考試題預習專欄

物理科 CAY 續力量問題解答

(有旅行现一張,其尺寸如下面,静置於無摩擦 之地板上,没有一人要150磅士於欄上其重量集中 於M處,若此榥可当作与重量計算,求心幌脚 DE處所变之力.6撥號AB&C處所受之力,並 以面表明之。

蔡淦明。

奶牛/秒 没鉛球香槍後之初速為其提升最大高度/sn.

则根据动量不滅原理:

1000

7*4.95 7/17

又根据能量之变换闺售

ha Plag

--- 14951/288.8.

因摩擦而生之水平分力,而只有士直之作用力看了 又因此欄可視為一完整之剛條為易於明嘹起 -

可将之假想為下面形状

ZT=FF DE

ME=MB+B

6.5

18725

答:搶弹等出板後之速度84.95米/秒

鉛球应升高1.25米

13 有一玩殺技者順序连注拋高球之皆還惕在 空间或在拋擲中,传球均曾抛球時同為 0.2秒,接球時间為0.3秒,其中间满的秒道设接

能連環拋而不失手?)拋球時应用若干。)接 球時平均用力者寸 鲜

*间隔2杪+花乙球+抛乙球+间隔+接球

+ the rig tgh + 15] 15 −0.2+0.3+02+02+03+02+0,2)

但国抛高市下降所需時間相等,故应各佔

4875

(=:784*厘米/秒

b-917

5756厘米

初法和下降话速為

炒

v = 980x0.8x

= 48.75 4

(b) 此櫈可分解為櫈面两脚部份

現光研究揆面.

若抛球時用力為下,则根据动量之阅信

0.2F=20x784

F = 78400 達因

80克

(C)胎花球時平均用力则

55260212

!= 53.3克

作用力必在揆餃AB處

What is soil? And describe the chemical composition and physical. structure of it. Why do the activities of plants and animals affect then?

The weathering product of rocks, br nical and chemical means; forms soil. N

There are types of soil classified according to the position of deposit of the soil: if the sail, so formed, remains on the peak or the top of the mountain rocks it is termed sedentary; if the deposited spil is accumulated in river beds, glaciers or the "san it in terasd sedimentary or alluvial. While chalke soils and corel sands consist almost wholly of the fossil remains of marine organisses with calcareous shells.

Soil consists of a mixture of sand and clay particien, DURUS, water, air, dissolved mineral salts and bacteria, Gomorally the major parts of soil materials are insoluble,

If the soil particles are generally small, and colloids are formed, the scal isa clayro

If the soil particles are relatively large, the soil is sandy”. Clay soila hold water and have little air in them, while sandy> noils are free-draining and well-sorated, and

The insufficiency of water causes a sand a low specific nest, së that it responds rapidly to changes in atmospheric temperature. The opppaite is true of clays.

The humus is composed, or rotten or asosyed organzo material,

It makes the soil brown in color to a large extent. It is most fertile and supplies plants with minerals which were part of the organism from which the humus was derived. It is of great value in soil in that it holds water. in quick-drying sends, and loosens the texture of heavy soils by its fibrous constituenta.

The soil water is of dilute carbonig seid solution, containing dissolved minemia. Under normal conditions, the water molsoulés. are held around each soil particle by capillary attraction. capillary watar is available to plants.

Univ. the.

The air, contained in the spaces. between the soil particles,' ia for respiration of soil organisms and plant roots. The nitrogen in the air is utilized by nitrogen Tixing bacteria.

The mineral salts, such as calcium and phosphorum, are extracted the soil by plants, which may later be saten by animals. The salts are deposited and formed the bone tissue which in rețum will form local concentrations of calcium and phosphorus in the soil when the animals die

lug and phosphorus in the

By the help of bacteria and fungi in the soil the formation of nitrates (essential compound of a fertilizer) from ammonia in the nitrogen cycle makes possible.

The animals such as sarthworms and insect (ATVAL BUTOV in the soil, improving the drainage and allow the air to penetrate, Large berbivorous animale living on the surface of the soil can affect its structure by denuding it of vegetation, and consequently causing soil, orosion. Dead plent roots decaying in the soil leave humis filled chainels ebich aid aeration..

Give an illustrated description of the complete metamorphosis of a Cabbage White Butterfly. Try to differ the metamorphosis of thes amphilia (m.. frog) from the Cabbage White Butterfir (insert).

The Cabbage White Butterfly is an insect which undergoes compl (metamorphosis (1.8. a distinct developing stage le pbserved)./

the agra of the Cabbage White Butterfly, laid in April or May and In August or September, are contcal in shape and have vertical and horizontal "rangen on tal surface, They are laid n batches of 20 - 100 on the undere) weide of the leaves. They hateb in about 7 – 20 days with a black dot at the narrow end of each hatching egg. Afterwards a caterpillar or larga is formed from each

Tus lamme of batterflies (and Noths) are called caterpillars,. Each) of then foreight" green with three longitudinal yellow liver ruming” the length of the body. It is slightly hairy. The head bears a pair of sen Antennae, six pairs of simple eyes, and a spinneret for spinning silk, The muth-parts on the lower side of the head are simple mandibles. As the larva grows. it passes through five ectrace er moults, casting ite rigid skin sách tins to allow funther growths At the last moulting 15 Zoares its food plant and clikbs a sundort where the pupa is formed. /

1.

"The pupa or a sutterfly is termed, chuydalis which is attached to 17 "support by a silk pad and girdle forsed by the caterpillar!s spinneret.

Its skin is shed and the pupa is enclosed in a thin yellow skin through which the developing organs of the adult butterfly, can be seen. The pupa does not feed, but there is a complete reorganization of the larval tissue which is broken down and reformed into the tissues of the adulto. It taken, About seventeën days for the development from larva to imago, 7

„/TIB 178go or adult, is the reproductive stage or life ¿ycle,▼ The wingu of the lungo kry will and crumpled, but soon they expand and become hardn ened. There is no ecdysis occurred. The image lives for a few weeks and j Tends on extracting nectar from nastardes of the lowers.

- nero in tan life cycle of a Cabbage White Butterflyy

難以决定,則可假想此较亚不 ̇稳园书其受力格价可能移动之 「向野花為基反作用が済何

{Tam Fm AM - V AB=O

150x419

366675磅

古直力泥和為2Fy> Va+h - Fm #O,

= 150- 66.67

83.33 磅

商研究榥脚AB

= Va+ Fe = 83.33-6875.

#11458磅)

最後研究櫈脚 BD

H2 = H2 = 13

(一)由前知A處之作用力為法(二)由(0)和疮=6875磅(處 各Ha,今此機郡Aは受到手れ分大山根 西旬 女相寺南方向相瓜之作用がゆえ清南島書算分本可向上

(0) Fan 8/25磅,Fe=68.75磅!

(6) V= 83.3.30 Hat 131:05:15

Vs= 66.67 m th=131.25 75

Ve=14.58磅HG=131,25磅

Compandeyes

•Vertical ridges. "Horizontal ridge"

•ayer Spineles

Antenna

Antenn

etime

Wing

xpiracles Lateral projections)

ipa (dbrusalie).

Clasper)

在此即成為提脚之作用力。

根据相似形之定理得。

Zle - Ha bi - Va di- Fe Q12 mo

然 AB

2.有一速度為59200厘米/秒之槍漂在買芽~厚一厘米之家 柏稿,隨即射中一些专之铅球而卷入球中設木板之

DE

The metamorphosis of the amphibian (e.g, freg) mffers from that of the insect (Cabbage White Butterfly) in the following ways:-

12 28 gradual, wazie that or the butterfly is in distinct stages. Some of the changes in the frog, such as lose of gills, and the development of lungs, are related to changes of habitat.

平均阻力為58·中噸,铅球宝一仟元搶弹曼10元间yttense wtware watamorp

搶碑等出松後之速度及此铅球合槍魚後:应为高各+

12=14x-1=87

2-12-12=458

解,若搶弹穿出不怕後之速為以,则根据能量不滅

原理

50 2008 1/4 = 21-10 ( 592 -_U")

50000

is complete, but the butterfly is sexually mature at the end of metamorphasis.

Exercises for this week:

What are differences between a bony fish and a cartilaginous fish?"

Illustrate orielyne varzous stages in the life cycle of a house fly da relation to its adaptation to its living environment,