Last term half semester examinations
Last term half semester examinations
The early two years physics tries
Fill blank:(32 cents, each time blank space 1 cent)
The basic tool that the length measure BE__________, the main unit of length BE__________;
The unit convert:
(1)A length of magazine is 2.63______=_________m;
(2)The height of room is 300______=_________m;
(3)27Km/h =____________________=__________m/s;
(4)30m/s =____________________=__________Km/h;
3, speed is mean object______________ of physics quantity, a car do evenly and soon and straightly exercise of speed is 15 ms/s, this speed reads to make____________________, mean______________________________.
4, the person talk of voice BE_______________output.The voice want depend__________dissemination, orotund in the vacuum of speed is__________;
5, the some classmate uses to engrave one degree Chinese foot to measure a length of pen, the number distinguishes for the 17.23 cms, 17.21 cms, 1.724 dms, 0.185 ms, among them false record BE__________, the actual length of this pen is__________;
6, two kinds of method of the vaporization BE__________and__________;Their same place BE__________and__________.The method which reduces slow evaporation include(1)______________________________;(2)______________________________;(3)______________________________.
7, the Earth synchronously corresponds by letter the satellite opposite Earth BE__________, opposite__________BE athletic;"sunset Xi mountain" with__________for according to a thing;
8, A, B two cars evenly and soon leave for B city from the A city at same highway top, AN is vehicle-use 8 hs, B is vehicle-use 5 hs, then A, the ratio V AN of the speed of B two cars:V B=__________, in same time, the distance ratio S A drive by two cars:S B=__________;Pass same road use of time compare t A: t B=__________
9, an iron ball follows the 20 ms long inclined plane after roll the bottom and stops after the level ground ascend roll over a 25 ms under.The iron ball is on the inclined plane with level ground up sport of time is 5 ses and 10 ses respectively, then the iron ball is in average speed V1 on the inclined plane, average speed V2 of horizontal plane, the whole distanceses average speed V3, the ratio V1 of threes:V2:V 3=__________.
Choice.(30 cent, each small 3 cent)
Use to be subjected to one degree Chinese foot diagraph of the engrave of hot inflation, measure result BE()
A.Be partial to big B. Be partial to small C. Uninfluenced D. All probably
Evenly and soon and straightly exercise medium, the following parlance is correct BE()
The road that the speed big object pass must grow;
Speed big object sport time must be short;
Object sport speed from sport time decide of;
The speed of the object have nothing to do with pass of road and time.
Following is crystal what to solidify portrait BE()
Use to engrave one degree Chinese foot to measure one object length, the record data 1.71 ms, this engrave one degree Chinese foot minimum engrave a degree BE()
A, m B,dm C,cm D,mm
5, following belong to what to absorb hot process BE()
A, water solidifies into ice B, the formation C of frost, the moth-ball diminishes D, the formation of "white spirit"
6, house and school of some classmate are apart from for the 1.20 Kms, he comes home to go back and forth to to walk a 40 mins from the school, then his on foot speed is()
A,0.03Km/h B,800m/s C,300m/s D,3.6Km/h
7, a row train grows a 200 ms, with the speed V=the 144 Kms/h evenly and soon passes a bridge, totally use a 55 ses, then the length() of this bridge
A,3780m B,1050m C,900m D,2000m
8, some thermometer at ice water mixture China Times column of mercury's being long is a 5 cms, the column of mercury grows a 30 cms in 1 standard atmospheres press down of the boiling water and be column of mercury long for 14 cms show temperature for()
A, 26 ℃ Bs, 36 ℃ Cs, 18 ℃ Ds, 45 ℃
9, in once blow up, the speed which ignites line combustion is a 0.5 cms/s, spark to order to ignite line after with 10 ms/s of the speed run to a distance explosion to order outside in the 600 m just safe, then ignite linear length at least()
A,80cm B,30cm C,60cm D,50cm
10, show such as the right diagram, small tube and beaker all have just the right amount small ice-cubes, surroundings temperature is 0 ℃ .Give to burn heating now, be beaker inside of when the small ice-cubes melt, then small ice-cubes() in the tube
A, the part melt B, don't melt C, may melt D, can't judge
Three, Jian3 Da Ti2(4+4=8)
Intense heat, dog why want to stretch loose tongue, big big pant
Can measure the temperature that the standard atmosphere presses down boiling water with the alcohol thermometer if use the clinical thermometer of alcohol creation can disinfect with 50 ℃ hot water why(the melting point-117 ℃ of the alcohol thermometer, boiling point 79.5 ℃ )
Four, experiment:(15 cents, each time space 1 cent)
In"measure average speed" the experiment, the diagraph instrument which needs to be use have__________and__________.
Descend the diagram is a melt of some crystal with solidify portrait is can know by the diagram:the crystal's melting point is__________;Among them, the crystal is placed in a solid BE__________segment, be placed in a solid liquid coexistence BE__________segment;__________segment mean to melt to absorb hot process, temperature BE__________;________segment mean concretion process, this process want____hot.
The cent degree value which descends diagram to engrave one degree Chinese foot BE____quantity distance BE_____, the length of wood piece is_______.
The read one is following to show of three temperature values(℃) of thermometers
A:__________ B:__________ C:__________
Five, calculation:(3+5+7=15)
An object does to evenly and soon and straightly exercise and pass inside 8 of the road is for the 16 ms, the sport speed which asks at the beginning inside 3 ses is how much
The car set out from the A station, arrive a B station after drive the 20 mins by the speed of the 90 Kms/h, drove a 10 mins to arrive a C station by the speed of the 60 Kms/h again and ask(1) two the stations are apart from how far(2) the car stand from A to C the average speed of the station
A ship on the water drive and on the boat send out one Ming whistle voice, the traveller hears the voice that the front come back from overhanging cliff glint after 4 ses and ask(1) if ship Ming whistle after stop drive right away, beg the distance of overhanging cliff and ship.(2)If the ship be continue with the speed of the 20 ms/s to drive forward after the Ming whistle, beg overhanging cliff and traveller to hear the distance of echo
Last term half semester examinations
Beginning two physicses try a reference answer
Fill blank:(each space 1 cent, total 32 cent)
1, engrave one degree Chinese foot rice
2,(1)dm 2.63 (2) cm 3 (3) 7.5 (4) 108
3, sport rate of speed 15 meters each the road that that passes inside the car each one is a 15 ms
4, the vibration of vocal cord lies quality 0(or 0 ms/s)
5,0.185m 17.23cm
6, evaporate ebullition to belong to the same the vaporization phenomenon wants to absorb hot(1) lower liquid of the temperature(2) let up the surface of liquid to accumulate(3) to reduce slow liquid noodles sky spirit of fluxion
7, static sun(or other star bodies) mountain
8,5:8 5:8 8:5
9,8:5:6
Choice:(each 3 cents, total 30 cent)
1
2
3
4
5
6
7
8
9
10
B
D
D
B
C
D
D
B
B
B
Jian3 Da Ti2:(each 4 cents, total 8 cent)
Stretch loose tongue can enlarge saliva of the surface accumulate, the big big pant can speed the fluxion of the saliva superficial air, can speed saliva evaporation thus from the body of dog inside absorb hot, lower the body temperature of dog.
Can't.Because the standard atmosphere presses down the temperature of boiling water to outrun alcoholic boiling point 79.5 ℃ for 100 ℃ , will cause the thermometer burst open.Can't.50 ℃outrun the temperature that can measure of the tallest of clinical thermometer to be worth 42 ℃ , use 50 ℃ hot water to disinfect for clinical thermometer, will cause the clinical thermometer burst open.
Four, experiment:(each space 1 cent, total 15 cent)
1, engrave one degree Chinese foot stop-watch
2,48 ℃ ABs, FG BC, EF BC 48 ℃ EFs put
3,1mm 5 cm 2.00 cm
4, 15.5 ℃ is 37.8 ℃ -7.5 ℃
Five, calculation:(15 cents)
2m/s
(1)40Km (2)80Km/h
(1)640m (2)640m
