普物-請問第41題

41。The surface of the continental United States has an area of about 8x 106 km2 and an average elevation of about 500 m (above sealevel. The average yearly rainfallis 75S cm.The frac- tion ofthis rainwaterthatreturns tothe atmosphere by evapora- tion is生the rest eventually flows into the ocean. Ifthe deerease in gravitational potential energy of the water-Earth_ system associated with that flow could be fully converted to eleetrieal energy, what would be the average power? (The massoflm'of water is 1000 kg.) 人 loon reaches its maximum height? potential energy is taken to be Zere its value atthe launch point) (D W 48 Avoleanicash ttowismovint eneountersa8.0” upslope.The ff up the slope before stopbing. As the flow Ift the flow and thus ground negligible: assume als the front ot the flow is conserve

求第17題

人 14. Profit The profit 16. 人2/ 2 / Wcd/e Figure for 17 Figure for 18 18. 95 。Volume_AIl edgaes of a cube Pro hom selling x units Of a product ls glven by 2三 510N 0 atarate ot 9 units per dl the prottt when (am) 、 二 4 The sales are Jncreasing ay. Find the rate Of change Of 00 units and (bD)文三 600 unjts, qre expanding at a rate How fast is the volume changing when each edge is (a) 2 centimeters and (b) 10 centimeters? ot 6 centimeters per second, Surface Area_AI edges ofacube are expanding at a Tate of 6 centimeters Per Second. How fast is the surface area changing when each edge is (a) 2 centimeters and (b) 10 centimeters? 。 Boating_A boat is pulled by a winch on a dock, and te winch is 3 meters above the deck of the boat (See figure). The winch pulls_the Tope at arate of 1 meter per second. Find thexspeed 6fthe boat when 5 meters 9t Tope 1S out. What happens to the Speed of the boat as it gets closer and closer to the dock? Shadow Length “Aman 2meters tall walks at arate 0f ].5 meters per second away from a light that is 5 meters aboye the ground (see figure). | (a) When he js 3 meters from the base of the light, at 人 和 生0) what rate js the tip of his shadow moving。 (b) When he js 3 meters from the base of the at what rate js the Jength of his shadow changlng。 Air Traffic_Control An airplane flying at an altitude Of 10 kilometers pasSes directly over aradar 蟬戰品 品 figure). When the airplane is 26 kilometerS away ($ 三 26), 由 卅0 ee 21, 22 23 24 12 店

嗯...不會統計更不會英文統計 有人可以教嗎🥺

Homework #1 TabletPC Comparison providesawide variety ofinformation abouttablet computers. The company's website enables consumers to easily compare different tablets using factors such as cost, type of operating system, display size, battery life, and CPU manufacturer. A sample of 10 tablet computers isshowninTable 1. (1) How many elements are in this data set? (2) How many variables are in this data set? (3) Which variables are categorical and which variables are quantitative? (4) What type of measurement scale is used for each ofthe variables? Table 1 Product Information for 10 Tablet Computers 點 Cost Operating| Display Size | Battery Life」 CPU (9 | System | (inches) (hours) |Manufacturerl AcerIconia W510 599 [Windows| 104 85 Intel Amazon Kindle Fire HD | 299 |「Android 89 9 TI Apple iPad 4 499 | ios 97 1 Apple HP Envy X2 | 860 [Windows| 116 8 Intel Lenovo ThinkPad Tablet| 668 「Windows| 101 105 Intel MicrosoftSurface Pro | 899 「Windows| 106 4 Intel Motorola Droid 530 「Android 1041 9 TIOMAP XYboard Samsung Ativ SmartPC| 590 「Windows| 116 7 Intel Samsung Galaxy Tab 525 「Android 104 10 Nvidia Sony Tablet 5 360 」Android 94 8 Nvidia 寢 For each of the following variables, indicate whether it is quantitative or qualitative and specify the measurement scale that is employed when taking measurements on each: (1 Class standing of the members of this class relative to each other (2) Admitting diagnosis of patients admitted to amental health clinic (3) Weights of babies born inahospital duringayear (4) Gender of babies born inahospital duringayear (5) Range of motion of elbow joint of students enrolled inauniversity health sciences curriculum (6) Under-arm temperature of day-old infants born inahospital

可以幫忙解答1，6，7這三題嗎

著Mt號暈 ookJv Uni / BookIV Unicli 綜合測驗 git 砰ma97人性 the as a aevery pcen YICV Asadead starceontinuegto,fallintodtseIficdrawe oles have long be rsuoe 36 BE BLE OUR站癌 area. This is 1_tmhest tmes mystery.。 Aceording to s gravitational forees will become extremely st ntists, if astar is three apses Wong whenitcol no light Ca 3 nescape the pull of its gravity 4_ like holes in the univer uld first look a can hardly be seen, If we want to understand black holes, we shos back to the ground because of grav1Uy Ona e different' In , the motion of objects would b : ckly bs ditwould plunge quickly avitation the ai it 5 earth”s gravity, 6 balI thrown into the air would not go very high, an' of the planet Yet the high speed 7 ak out 9 hs would tg - h 過 Janet. y註the eofgravi re billi ftimes 8 x plIanet. Only if the force of gravity were billions of times 全站ne detention 8 le. LI you 半 sent back toward the surface. Nothing leaves a black hol un What would happen to 6 emerge !m the fourth 9_to bethe most bizarre objects in the universe would black holes 9 you fell into a black hole? Ifyou were lucky enough to su you dimension: How 10 itsounds! f 選 ) 1(A) when ve (B) which (c) what (tp) who ( ) 2.(A) too; to (B) as; as (csuch; as D) as an (GI.2攝JudH @ Although (osinee @ 加so 一 0 ) 4(A) To Jook (B)Looks (c)Looked (DiLooking B) strays (c) spans (tp) detauns (D)however 誰 ) 5(A)returns ( (B) then (c) in other Words ( Dable 祥- ) 6(A) that is Bj) unable (cenables (D) the Strongest ( ( ( “( 人長 ) 7(A)beable ( (C)much strong ( (Dibelueve 凡 ) 8.(A) strong (B) stronger ) (cjinbeliet (pto interest 人 ) 2(A)are believed。 (Bare believing tfB) interesting (Cl interest ( ) JOfA) interested

這題該怎麼解呢

tower, the fluid flows 2 ina he verticalz directlon. De- 二 議 a edistance from the The ie at a large di from the entrance. and mae (及小 Atx 三 9, which is at the wall, .) Show all steps. 3.8-3. 了7oczy Pro9//e 加 Me down the inside as athin旬 Tive the equation for the Velocit liquid surface toward the wall. Also, derive expresSions for 2 站三0. Atx三 0,the surface of the flowing liquid,訪 和 交 max S Anms。 疼 三(ps6 7/2/0)[1 一 (x/9)外六w 二286 3人 半nmax 三 56 /2/4 AVWAOEE

17題為什麼要選（D）?

8:44 多人 貧 仿' 1 54%計 人人 ee XX 人9 5.( C ) Those students are now planning aschooltrip to Madagascar up to 90% ofthe animal and plant llfe 1s unmique to the 1sland. (A)where (B)了here (C), where (D), tere 6.( B ) 也ese workers talk loudly about thelir private llves In the offhice all day 1s both rude and annoylng. (A)Which (B)That (C)How (D)Why 7.( D )The bride the center of attention, but her bridesmald stole the show. (A)should be (B)can be(C)should have been (D)could be 8.( C )The customer refused to buy a CD ascratch on 1ts Surface. (A)which (B)for (0Cwith (D)了at 9.( B_)The musical at the National Theater last nilght was really amazling. (A)perform (B)performed (C)to perform 了了

求解

(0) Ifanew source (its energy is 7.19 x101? J with an intensity of35W is Incident on the copper Surface, What is the maximum number ofelcetrons that can be ejected from a 6.0 second pulse oflight ? 【100 台聯大(Al,A5)】 吝 (A) 0 (B) 3.71x 1016 Hz, (0) 3.71x 1017 Hz。(D) 3.71x 1018 Hz, (E)none ofabove. Ans.: (A)

求解

/A beamoflight with an intensity of 15W is incident ona copper plate -(work ftrniction is 7.43 x 10.19)D). Electrons with aminimum wavelength 0f 3.75x 10、" m are ejected from the surface ofthe copper. Calculate the frequency ofthe incident light. [Hint : Plank constant 三6.626 x 1034J.s] .。(A) 3.71x 101? Hz, (B) 3.71x 101“ Hz, (C) 3.71x 10U Hz, (D) 3.71x 1018 Hz, (E) none ofabove. 【100 台聯大(AI,A5)】 Ans.: (A)

求解

The Si8y of N2 in blood at 37”C 晤 at a par- tial pressure of 0.80 atm is 5.6 X 10-“ molL. A deep-Sea diver breathes compressed air with the partial presSure of N2 equal to 4.0 atm. AsSume that the total volume of blood in the body 1s 5.0工. Calculate the amount of N2 gas released (in liters at 37?C and 1 atm) when the diver returns to the surface of the water, where the partial presSure of N2 18 0.80 atm.

求圈起來的幾題

補史名www asftrppfysfts 600) For Thoughtand Diseussion tneuish the Aristotelian and Galilean/Newtonian views ofihe ball bounees ofrawall with the same speedithad beforeithit Wall Has its momentum changed? Hasaforoe acted on the 2 Has aforee acted on the wall? Relate your answers to New aws of motion ten use the term "inertias to deseribe human sluggishness 5this usage related to the meaning ofFsinertiae in physics? does aceiling fan continue to rotate even after you have vitched it ofP? Wek erashes into a Stalled cear A student trying to explain the es ofthis event claims thar no forees are involved: the car Tin the way”so itgot hit Commen foot astronaut kicks a ball, hard, across aspace station balls apparent weightlessness mean he astronauts toes 下avity on Jupiters moon Io is one-fifth that on Would happen te your weight and to your mass if nIo? tis the direcetion of momentum oFamoving body? Does it Fthe body: plane aceelerates down the munway, you take your keys r poeket and suspend them by a thread. Do they hang force from the chairon you. iir? Hnot, what forees are fxerrisesaned Problems 85 $ 還2620Groeoeoeardaoeos WiA poaor Wonoeno0 Op ir oa 20。 Staring frorm rest and undergoing constan acceleratiom,a920-kg ar covers 410 min $.15 8. Find the foree on the car 21 dropping dontest, a student encatses am 83-g cgg in large Styrofoam block. fs g emn'texceed 2.0N and 計the bloek hits the g pow mueh must the Styror jompress on impaet) Note: The aceelei assoeialed with stOppi gravity while the Styrofe the ground. 22. Inatront-end collision, a 1400-kg car with shockzabsorbing bump: ems can withstand amaximum force of 75kN before damage Gccurs: Hthe maximum speed foranondamaging collision is 9.0 kmzh, by Bow much must he bumper be able to move relative to the car? section 4.4 The Force ofGravity 23。 Show that the units of aceeleration can be written as N/kg- Why doesitmake sense to give gas 9.8 N/kg when talking about imass and weight? 24. Your spaceship crashes on one of the Sun's planets, Fortunately 上 the ship's scales are intact and show that your weightis 680 N.H your mass is 58 kg, where are you? (imr: Consult AppendixEE) Your friend can barely lift a 35-kg concrete block on E: massive ablock could she lift on the Moon? 26 Acereal box says "net weight 350 grams” Whats the actual Weight ta in SLunits and (b) in ounees? 27. Youre asafety engineerforabridge spanning the U,S-Canadian border. U.S. speeifications permit a maximum load of 10 tons What load iimit should you speeify on the Canadian side. where welght is given in kilograms? 28.。 The gravitational acceleration atthe lntermational Space Stations altitude is about 91凶 oFits surface value. Whats the weightofa 64-kg astronaut atthis altitude? ection 4.5 Using Newton's SecondLaw A 50-kg parachutist deseends atasteady 40 km/h. What foree does air exert on the parachute? 30, A 960-kg motorboat accelerates away from adock at2.1 m/s Its propellerprovides a3.9-kN thrust force. What drag force does the water exert on the boat? An elevator aceelerates downward at2.4 ms. What force does the elevator's floor exertona52-kg passengery 32. At 560 metric tons, the Airbus A-380 is the World's largest air- liner Whats the upward force on an A-380 when the plane is (am flying at constant altitude and (b) aceelerating upward at 15m/s2? 33. Yourre an engineer working on Ares 1 NASAs replacement tor the space Shuttles. Performance speces call for afirst-stage TOcket Gapable ofaccelerating atotal mass 0f 600 Me vertically ftom Testt0 7700 km in 1.7 min. Youre asked to determine tbe re- quired engine thrust (force) and the foree exerted ona79-kg as- tronaut during Tiftoff. What do you Teport? 34. You step into an elevatorand itacceleratesto adownward speed gfF8.8 mAS in 2.4 5 Quantitatively compare your apparent weight during thistime with youracetual weight, 44.6 NewtonsThirdLaw ional foree does 3 5600-kg elephant exer 必 63. she jumps ofta140-emhi過台 人 rdheras she falls?