作者barry800414 (小銘)
看板b98902HW
標題[公告] 普物功課題目
時間Sat Sep 26 20:28:37 2009
應該是chapter 1吧?
38. The SI unit of force ,the kilogram-meter per second squared(kg‧m/s^2)is
called the newton(N) Find the dimensions and the SI units if constant G in
Newton's law of gravitation F= G‧m1‧m2/r^2
50. A circular hole of radius 8.470 X 10^-1 cm must be cut into the front
panel of a display unit The tolerance is 1.0 X 10^-3 cm, which means the
actual hole cannot differ by more than this quantity from the desired radius
,If the actual hole is larger than the desired radius by the allowed tolerance
,what is the difference between the actual area and the desired area of the
hole?
72.A particular company's stock prices vary with the market and with the
company's type of business,and can be very unpredictable ,but people ofen
try to look for mathmatical patterns where they may not belong. Corning is
a material-engineering company located in upstate New York.
Below is a table of price Cornig stock on August 3,for every 5 years from
1981 to 2001 Assume that the price follows a power law : price (in $)=
B t^c where t is expressed in years .
(a)Evaluate the constants B and C (see methods suggested for the previous
problem )
(b) According to the power law ,what should the price of Corning stock have
been on August 3,2000? (It was actually $ 82.83!)
(a)price (dollars) 2.10 4.19 9.14 10.82 16.85
(b)Years since 1980 1 6 11 16 21
74.You and a friend are out hiking across a large flat plain and decide to
determine the height of a distant mountain peak,and also the horizontal
distance from you to the peak (Figure 1-19). In order to do this,you stand
int spot and determine that the sightline to the top of peak is inclined at
7.5度(我不會打度= =)above the horizontal You also make note of the heading
to the peak at that 13度 east of north. You stand at the original position,
and your friend hikes due west for 1.5km . He then sights the peak and
determines that its sightline has a heading of 15 度 east of north.
How far is the mountain from your position ,and how high is its summit above
your position?
圖我沒辦法了
話說我推薦在系館放一本給沒買的人抄題目
每次打不是辦法@@(雖然好像可練英打= =)
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◆ From: 140.112.241.197
1F：推 sunjw:哇 早知道就不用抄這麼辛苦 XD 09/26 20:32
2F：推 s864372002:我用手機照起來orz 09/26 20:33
3F：推 rod13824:樓上後來不是用打的嗎? 09/26 20:33
4F：推 s864372002:抱歉不小心斷了XD 09/26 20:33
5F：推 jeannatte:我和一樓抄的手都快斷了orz 09/26 20:39
6F：推 peteranny:推原po超熱心QQ 09/26 21:30
7F：→ barry800414:有人可以告訴我第二題的意思嗎= =...看不懂 09/26 21:36
※ 編輯: barry800414 來自: 140.112.241.197 (09/26 21:49)
8F：推 shelly61628:也可以每次把題目照起來XD(見下面) 09/26 23:22
9F：→ shelly61628:www.wretch.cc/album/album.php?id=shelly61628&book= 09/26 23:23
10F：→ shelly61628:13 (斷成兩行了..= =") 09/26 23:24
11F：→ sunjw:抄到快斷才想到用打的 XD 09/26 23:27
12F：推 andy860106:樓上上 可以縮網址吧。。。 09/27 00:56
13F：推 erodora:佛心來著 09/27 16:45
14F：推 asdfghjkl202:這不推就看得沒良心啦XDD！ 09/27 20:37
15F：推 tim199980:感謝感謝 09/27 20:54
16F：推 s864372002:72的"methods suggested for the previous problem"是. 09/27 21:23
17F：→ s864372002:難道在71題@@? 09/27 21:23
18F：推 paul112004:就在71題中：將y=Bt^C兩邊取log，觀察其graph以解B、C 09/27 21:31
19F：→ paul112004:（有錯煩請指正） //50題問的是面積差嗎？ 09/27 21:32
20F：推 s864372002:(回樓上：是的) 09/27 21:37
21F：推 paul112004:感謝樓上！ 09/27 21:42
22F：推 asdfghjkl202:可是72提算出來數據差好多喔?? 09/27 23:01
23F：推 andy88566y:0度空間裡有tipler 09/27 23:20
24F：推 alex800826:0.001695是四位有效數字喔~ 09/28 08:11
25F：推 davll:72應該要看計算過程 09/29 23:24