The physics paper in the second year of junior high school, I will do it, and I will give a 50 rewar

The revolution has not yet succeeded Comrades still need to work hard.

These are on your own.

What happens when the water in the flask is boiled and the alcohol lamp is removed, the water stops boiling, and when the water temperature is lower, when the syringe piston is pulled? Why??

This seems to be the question of junior high school 3.

Barometric pressure

Damn it!! Would you chase an antelope at a distance of 10 km?

Today's junior high school students are really not presentable.

It seems that a cheetah cannot run fast for 20 minutes, and it will die because the temperature in its body continues to rise. Answer: 50km h

2 I only sent the sedan chair to remember that Qing was so cautious that it was rice, and I forgot about the process.

3 36 60 60 10 km).

340 10 2 km.

Kilometer. 4 54,000 meters and 54,000 meters.

54000 60 60 15 m sec.

130 (15 5) 13 seconds.

1. [89-(-3)] 100-0)=[23-(-3)] Shen Xian accompanies (t-0) to get t=

2. The minimum height is half of the height of the person.

3. V car = 36 km = 10 m s

s = (s sound - s car pie staring) 2 = (v sound t - v car t) 2 = (340m s*10s-10m s*10s) 2 = 1650m

Kilometers = 15 m s

t=s v=s (v rook - v team) = 130m (15m s-5m s) = 13s

1.Let the difference from one degree of circular beat be x

Then 100x=100-(3+89) is x=

So Tachibana 23* (He roll).

2.3.I'm not free, I'll wait.

The first question assumes that the original thermometer is 1 small grid representing 1 degree Celsius, and now let's calculate its true graduation value = (89 +3 ) 100= and Zen Ming, the thermometer at this time shows 23 from -3 with 26 small cells in the middle.

Question 2: According to the law of reflection, if the position of the mirror is fixed by He Zhongzhao, then the highest part of the mirror is to the top of his head, and the lowest part is not counted by removing the height above the eye, that is.

Question 3 (340*10-35*10) 2=

100-89+23=34 [to add units] You send socks to tease, just remember that the standard atmospheric pressure boiling water is 100. It doesn't matter how many meters, it's mainly a matter of perspective dust sales, but consider the actual problem for. 340m s*10-1m*10=3390m I've done the conversion for you!

It's not enough, it's good! 5 meters seconds = 300 meters minutes = 180 kilometers faster than a car!

1.Since the temperature of the vertical mixture of ice water is zero, the actual temperature when this thermometer is zero.

The standard atmospheric pressure is one, so this is the actual temperature state of the thermometer is one.

Add 89 to 3 to get 91 degrees, and divide 100 by 91 to get about degrees. Finally, use the multiplication of 23.