跪求八年级课本的所有物理公式(人教版) 人教版物理八年级上册公式 全部
\u516b\u5e74\u7ea7\u4e0a\u5168\u90e8\u7269\u7406\u516c\u5f0f(\u65b0\u4eba\u6559\u7248\uff09\u7269\u7406\u91cf\uff08\u5355\u4f4d\uff09 \u516c\u5f0f \u5907\u6ce8 \u516c\u5f0f\u7684\u53d8\u5f62
\u901f\u5ea6V\uff08m/S\uff09 v= S\uff1a\u8def\u7a0b/t\uff1a\u65f6\u95f4
\u91cd\u529bG (N\uff09 G=mg m\uff1a\u8d28\u91cf g\uff1a9.8N/kg\u6216\u800510N/kg
\u5bc6\u5ea6\u03c1 \uff08kg/m3\uff09 \u03c1=m/V m\uff1a\u8d28\u91cf V\uff1a\u4f53\u79ef
\u5408\u529bF\u5408 \uff08N\uff09 \u65b9\u5411\u76f8\u540c\uff1aF\u5408=F1+F2
\u65b9\u5411\u76f8\u53cd\uff1aF\u5408=F1\u2014F2 \u65b9\u5411\u76f8\u53cd\u65f6\uff0cF1>F2
\u6d6e\u529bF\u6d6e
(N) F\u6d6e=G\u7269\u2014G\u89c6 G\u89c6\uff1a\u7269\u4f53\u5728\u6db2\u4f53\u7684\u91cd\u529b
\u6d6e\u529bF\u6d6e
(N) F\u6d6e=G\u7269 \u6b64\u516c\u5f0f\u53ea\u9002\u7528
\u7269\u4f53\u6f02\u6d6e\u6216\u60ac\u6d6e
\u6d6e\u529bF\u6d6e
(N) F\u6d6e=G\u6392=m\u6392g=\u03c1\u6db2gV\u6392 G\u6392\uff1a\u6392\u5f00\u6db2\u4f53\u7684\u91cd\u529b
m\u6392\uff1a\u6392\u5f00\u6db2\u4f53\u7684\u8d28\u91cf
\u03c1\u6db2\uff1a\u6db2\u4f53\u7684\u5bc6\u5ea6
V\u6392\uff1a\u6392\u5f00\u6db2\u4f53\u7684\u4f53\u79ef
(\u5373\u6d78\u5165\u6db2\u4f53\u4e2d\u7684\u4f53\u79ef)
\u6760\u6746\u7684\u5e73\u8861\u6761\u4ef6 F1L1= F2L2 F1\uff1a\u52a8\u529b L1\uff1a\u52a8\u529b\u81c2
F2\uff1a\u963b\u529b L2\uff1a\u963b\u529b\u81c2
\u5b9a\u6ed1\u8f6e F=G\u7269
S=h F\uff1a\u7ef3\u5b50\u81ea\u7531\u7aef\u53d7\u5230\u7684\u62c9\u529b
G\u7269\uff1a\u7269\u4f53\u7684\u91cd\u529b
S\uff1a\u7ef3\u5b50\u81ea\u7531\u7aef\u79fb\u52a8\u7684\u8ddd\u79bb
h\uff1a\u7269\u4f53\u5347\u9ad8\u7684\u8ddd\u79bb
\u52a8\u6ed1\u8f6e F= \uff08G\u7269+G\u8f6e\uff09
S=2 h G\u7269\uff1a\u7269\u4f53\u7684\u91cd\u529b
G\u8f6e\uff1a\u52a8\u6ed1\u8f6e\u7684\u91cd\u529b
\u6ed1\u8f6e\u7ec4 F= \uff08G\u7269+G\u8f6e\uff09
S=n h n\uff1a\u901a\u8fc7\u52a8\u6ed1\u8f6e\u7ef3\u5b50\u7684\u6bb5\u6570
\u673a\u68b0\u529fW
\uff08J\uff09 W=Fs F\uff1a\u529b
s\uff1a\u5728\u529b\u7684\u65b9\u5411\u4e0a\u79fb\u52a8\u7684\u8ddd\u79bb
\u6709\u7528\u529fW\u6709
\u603b\u529fW\u603b W\u6709=G\u7269h
W\u603b=Fs \u9002\u7528\u6ed1\u8f6e\u7ec4\u7ad6\u76f4\u653e\u7f6e\u65f6
\u673a\u68b0\u6548\u7387 \u03b7= \u00d7100%
\u529f\u7387P
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W\uff1a\u529f
t\uff1a\u65f6\u95f4
\u538b\u5f3ap
\uff08Pa\uff09 P=
F\uff1a\u538b\u529b
S\uff1a\u53d7\u529b\u9762\u79ef
\u6db2\u4f53\u538b\u5f3ap
\uff08Pa\uff09 P=\u03c1gh \u03c1\uff1a\u6db2\u4f53\u7684\u5bc6\u5ea6
h\uff1a\u6df1\u5ea6\uff08\u4ece\u6db2\u9762\u5230\u6240\u6c42\u70b9
\u7684\u7ad6\u76f4\u8ddd\u79bb\uff09
\u70ed\u91cfQ
\uff08J\uff09 Q=cm\u25b3t c\uff1a\u7269\u8d28\u7684\u6bd4\u70ed\u5bb9 m\uff1a\u8d28\u91cf
\u25b3t\uff1a\u6e29\u5ea6\u7684\u53d8\u5316\u503c
\u71c3\u6599\u71c3\u70e7\u653e\u51fa
\u7684\u70ed\u91cfQ\uff08J\uff09 Q=mq m\uff1a\u8d28\u91cf
q\uff1a\u70ed\u503c
\u5e38\u7528\u7684\u7269\u7406\u516c\u5f0f\u4e0e\u91cd\u8981\u77e5\u8bc6\u70b9
\u4e00\uff0e\u7269\u7406\u516c\u5f0f
\u5355\u4f4d\uff09 \u516c\u5f0f \u5907\u6ce8 \u516c\u5f0f\u7684\u53d8\u5f62
\u4e32\u8054\u7535\u8def
\u7535\u6d41I\uff08A\uff09 I=I1=I2=\u2026\u2026 \u7535\u6d41\u5904\u5904\u76f8\u7b49
\u4e32\u8054\u7535\u8def
\u7535\u538bU\uff08V\uff09 U=U1+U2+\u2026\u2026 \u4e32\u8054\u7535\u8def\u8d77
\u5206\u538b\u4f5c\u7528
\u4e32\u8054\u7535\u8def
\u7535\u963bR\uff08\u03a9\uff09 R=R1+R2+\u2026\u2026
\u5e76\u8054\u7535\u8def
\u7535\u6d41I\uff08A\uff09 I=I1+I2+\u2026\u2026 \u5e72\u8def\u7535\u6d41\u7b49\u4e8e\u5404
\u652f\u8def\u7535\u6d41\u4e4b\u548c\uff08\u5206\u6d41\uff09
\u5e76\u8054\u7535\u8def
\u7535\u538bU\uff08V\uff09 U=U1=U2=\u2026\u2026
\u5e76\u8054\u7535\u8def
\u7535\u963bR\uff08\u03a9\uff09 = + +\u2026\u2026
\u6b27\u59c6\u5b9a\u5f8b I=
\u7535\u8def\u4e2d\u7684\u7535\u6d41\u4e0e\u7535\u538b
\u6210\u6b63\u6bd4\uff0c\u4e0e\u7535\u963b\u6210\u53cd\u6bd4
\u7535\u6d41\u5b9a\u4e49\u5f0f I=
Q\uff1a\u7535\u8377\u91cf\uff08\u5e93\u4ed1\uff09
t\uff1a\u65f6\u95f4\uff08S\uff09
\u7535\u529fW
\uff08J\uff09 W=UIt=Pt U\uff1a\u7535\u538b I\uff1a\u7535\u6d41
t\uff1a\u65f6\u95f4 P\uff1a\u7535\u529f\u7387
\u7535\u529f\u7387 P=UI=I2R=U2/R U:\u7535\u538b I\uff1a\u7535\u6d41
R\uff1a\u7535\u963b
\u7535\u78c1\u6ce2\u6ce2\u901f\u4e0e\u6ce2
\u957f\u3001\u9891\u7387\u7684\u5173\u7cfb C=\u03bb\u03bd C\uff1a
\u7269\u7406\u91cf \u5355\u4f4d \u516c\u5f0f
\u540d\u79f0 \u7b26\u53f7 \u540d\u79f0 \u7b26\u53f7
\u8d28\u91cf m \u5343\u514b kg m=pv
\u6e29\u5ea6 t \u6444\u6c0f\u5ea6 \u00b0C
\u901f\u5ea6 v \u7c73\uff0f\u79d2 m/s v=s/t
\u5bc6\u5ea6 p \u5343\u514b\uff0f\u7c733 kg/m3 p=m/v
\u529b\uff08\u91cd\u529b\uff09 F \u725b\u987f\uff08\u725b\uff09 N G=mg
\u538b\u5f3a P \u5e15\u65af\u5361\uff08\u5e15\uff09 Pa P=F/S
\u529f W \u7126\u8033\uff08\u7126\uff09 J W=Fs
\u529f\u7387 P \u74e6\u7279\uff08\u74e6\uff09 w P=W/t
\u7535\u6d41 I \u5b89\u57f9\uff08\u5b89\uff09 A I=U/R
\u7535\u538b U \u4f0f\u7279\uff08\u4f0f\uff09 V U=IR
\u7535\u963b R \u6b27\u59c6\uff08\u6b27\uff09 R=U/I
\u7535\u529f W \u7126\u8033\uff08\u7126\uff09 J W=UIt
\u7535\u529f\u7387 P \u74e6\u7279\uff08\u74e6\uff09 w P=W/t=UI
\u70ed\u91cf Q \u7126\u8033\uff08\u7126\uff09 J Q=cm(t-t\u00b0)
\u6bd4\u70ed c \u7126\uff0f\uff08\u5343\u514b\u00b0C\uff09 J/(kg\u00b0C)
\u771f\u7a7a\u4e2d\u5149\u901f 3\u00d7108\u7c73\uff0f\u79d2
g 9.8\u725b\u987f\uff0f\u5343\u514b
15\u00b0C\u7a7a\u6c14\u4e2d\u58f0\u901f 340\u7c73\uff0f\u79d2
\u521d\u4e2d\u7269\u7406\u516c\u5f0f\u6c47\u7f16
\u3010\u529b \u5b66 \u90e8 \u5206\u3011
1\u3001\u901f\u5ea6\uff1aV=S/t
2\u3001\u91cd\u529b\uff1aG=mg
3\u3001\u5bc6\u5ea6\uff1a\u03c1=m/V
4\u3001\u538b\u5f3a\uff1ap=F/S
5\u3001\u6db2\u4f53\u538b\u5f3a\uff1ap=\u03c1gh
6\u3001\u6d6e\u529b\uff1a
\uff081\uff09\u3001F\u6d6e\uff1dF\u2019\uff0dF (\u538b\u529b\u5dee)
\uff082\uff09\u3001F\u6d6e\uff1dG\uff0dF (\u89c6\u91cd\u529b)
\uff083\uff09\u3001F\u6d6e\uff1dG (\u6f02\u6d6e\u3001\u60ac\u6d6e)
\uff084\uff09\u3001\u963f\u57fa\u7c73\u5fb7\u539f\u7406\uff1aF\u6d6e=G\u6392\uff1d\u03c1\u6db2gV\u6392
7\u3001\u6760\u6746\u5e73\u8861\u6761\u4ef6\uff1aF1 L1\uff1dF2 L2
8\u3001\u7406\u60f3\u659c\u9762\uff1aF/G\uff1dh/L
9\u3001\u7406\u60f3\u6ed1\u8f6e\uff1aF=G/n
10\u3001\u5b9e\u9645\u6ed1\u8f6e\uff1aF\uff1d(G\uff0bG\u52a8)/ n (\u7ad6\u76f4\u65b9\u5411)
11\u3001\u529f\uff1aW\uff1dFS\uff1dGh (\u628a\u7269\u4f53\u4e3e\u9ad8)
12\u3001\u529f\u7387\uff1aP\uff1dW/t\uff1dFV
13\u3001\u529f\u7684\u539f\u7406\uff1aW\u624b\uff1dW\u673a
14\u3001\u5b9e\u9645\u673a\u68b0\uff1aW\u603b\uff1dW\u6709\uff0bW\u989d\u5916
15\u3001\u673a\u68b0\u6548\u7387\uff1a \u03b7\uff1dW\u6709/W\u603b
16\u3001\u6ed1\u8f6e\u7ec4\u6548\u7387\uff1a
\uff081\uff09\u3001\u03b7\uff1dG/ nF(\u7ad6\u76f4\u65b9\u5411)
\uff082\uff09\u3001\u03b7\uff1dG/(G\uff0bG\u52a8) (\u7ad6\u76f4\u65b9\u5411\u4e0d\u8ba1\u6469\u64e6)
\uff083\uff09\u3001\u03b7\uff1df / nF (\u6c34\u5e73\u65b9\u5411)
\u3010\u70ed \u5b66 \u90e8 \u5206\u3011
1\u3001\u5438\u70ed\uff1aQ\u5438\uff1dCm(t\uff0dt0)\uff1dCm\u0394t
2\u3001\u653e\u70ed\uff1aQ\u653e\uff1dCm(t0\uff0dt)\uff1dCm\u0394t
3\u3001\u70ed\u503c\uff1aq\uff1dQ/m
4\u3001\u7089\u5b50\u548c\u70ed\u673a\u7684\u6548\u7387\uff1a \u03b7\uff1dQ\u6709\u6548\u5229\u7528/Q\u71c3\u6599
5\u3001\u70ed\u5e73\u8861\u65b9\u7a0b\uff1aQ\u653e\uff1dQ\u5438
6\u3001\u70ed\u529b\u5b66\u6e29\u5ea6\uff1aT\uff1dt\uff0b273K
\u3010\u7535 \u5b66 \u90e8 \u5206\u3011
1\u3001\u7535\u6d41\u5f3a\u5ea6\uff1aI\uff1dQ\u7535\u91cf/t
2\u3001\u7535\u963b\uff1aR=\u03c1L/S
3\u3001\u6b27\u59c6\u5b9a\u5f8b\uff1aI\uff1dU/R
4\u3001\u7126\u8033\u5b9a\u5f8b\uff1a
\uff081\uff09\u3001Q\uff1dI2Rt\u666e\u9002\u516c\u5f0f)
\uff082\uff09\u3001Q\uff1dUIt\uff1dPt\uff1dUQ\u7535\u91cf\uff1dU2t/R (\u7eaf\u7535\u963b\u516c\u5f0f)
5\u3001\u4e32\u8054\u7535\u8def\uff1a
\uff081\uff09\u3001I\uff1dI1\uff1dI2
\uff082\uff09\u3001U\uff1dU1\uff0bU2
\uff083\uff09\u3001R\uff1dR1\uff0bR2
\uff084\uff09\u3001U1/U2\uff1dR1/R2 (\u5206\u538b\u516c\u5f0f)
\uff085\uff09\u3001P1/P2\uff1dR1/R2
6\u3001\u5e76\u8054\u7535\u8def\uff1a
\uff081\uff09\u3001I\uff1dI1\uff0bI2
\uff082\uff09\u3001U\uff1dU1\uff1dU2
\uff083\uff09\u30011/R\uff1d1/R1\uff0b1/R2 [ R\uff1dR1R2/(R1\uff0bR2)]
\uff084\uff09\u3001I1/I2\uff1dR2/R1(\u5206\u6d41\u516c\u5f0f)
\uff085\uff09\u3001P1/P2\uff1dR2/R1
7\u5b9a\u503c\u7535\u963b\uff1a
\uff081\uff09\u3001I1/I2\uff1dU1/U2
\uff082\uff09\u3001P1/P2\uff1dI12/I22
\uff083\uff09\u3001P1/P2\uff1dU12/U22
8\u7535\u529f\uff1a
\uff081\uff09\u3001W\uff1dUIt\uff1dPt\uff1dUQ (\u666e\u9002\u516c\u5f0f)
\uff082\uff09\u3001W\uff1dI2Rt\uff1dU2t/R (\u7eaf\u7535\u963b\u516c\u5f0f)
9\u7535\u529f\u7387\uff1a
\uff081\uff09\u3001P\uff1dW/t\uff1dUI (\u666e\u9002\u516c\u5f0f)
\uff082\uff09\u3001P\uff1dI2R\uff1dU2/R (\u7eaf\u7535\u963b\u516c\u5f0f)
\u3010\u5e38 \u7528 \u7269 \u7406 \u91cf\u3011
1\u3001\u5149\u901f\uff1aC\uff1d3\u00d7108m/s (\u771f\u7a7a\u4e2d)
2\u3001\u58f0\u901f\uff1aV\uff1d340m/s (15\u2103)
3\u3001\u4eba\u8033\u533a\u5206\u56de\u58f0\uff1a\u22650\uff0e1s
4\u3001\u91cd\u529b\u52a0\u901f\u5ea6\uff1ag\uff1d9\uff0e8N/kg\u224810N/kg
5\u3001\u6807\u51c6\u5927\u6c14\u538b\u503c\uff1a
760\u6beb\u7c73\u6c34\u94f6\u67f1\u9ad8\uff1d1\uff0e01\u00d7105Pa
6\u3001\u6c34\u7684\u5bc6\u5ea6\uff1a\u03c1\uff1d1\uff0e0\u00d7103kg/m3
7\u3001\u6c34\u7684\u51dd\u56fa\u70b9\uff1a0\u2103
8\u3001\u6c34\u7684\u6cb8\u70b9\uff1a100\u2103
9\u3001\u6c34\u7684\u6bd4\u70ed\u5bb9\uff1a
C\uff1d4\uff0e2\u00d7103J/(kg?\u2103)
10\u3001\u5143\u7535\u8377\uff1ae\uff1d1\uff0e6\u00d710-19C
11\u3001\u4e00\u8282\u5e72\u7535\u6c60\u7535\u538b\uff1a1\uff0e5V
12\u3001\u4e00\u8282\u94c5\u84c4\u7535\u6c60\u7535\u538b\uff1a2V
13\u3001\u5bf9\u4e8e\u4eba\u4f53\u7684\u5b89\u5168\u7535\u538b\uff1a\u226436V\uff08\u4e0d\u9ad8\u4e8e36V\uff09
14\u3001\u52a8\u529b\u7535\u8def\u7684\u7535\u538b\uff1a380V
15\u3001\u5bb6\u5ead\u7535\u8def\u7535\u538b\uff1a220V
16\u3001\u5355\u4f4d\u6362\u7b97\uff1a
\uff081\uff09\u30011m/s\uff1d3\uff0e6km/h
\uff082\uff09\u30011g/cm3 \uff1d103kg/m3
\uff083\uff09\u30011kw?h\uff1d3\uff0e6\u00d7106J
\u7269\u7406\u91cf\uff08\u5355\u4f4d\uff09 \u516c\u5f0f \u5907\u6ce8 \u516c\u5f0f\u7684\u53d8\u5f62 \u901f\u5ea6V\uff08m/S\uff09 v= S\uff1a\u8def\u7a0b/t\uff1a\u65f6\u95f4 \u91cd\u529bG (N\uff09 G=mg m\uff1a\u8d28\u91cf g\uff1a9.8N/kg\u6216\u800510N/kg \u5bc6\u5ea6\u03c1 \uff08kg/m3\uff09 \u03c1=m/V m\uff1a\u8d28\u91cf V\uff1a\u4f53\u79ef \u5408\u529bF\u5408 \uff08N\uff09 \u65b9\u5411\u76f8\u540c\uff1aF\u5408=F1+F2 \u65b9\u5411\u76f8\u53cd\uff1aF\u5408=F1\u2014F2 \u65b9\u5411\u76f8\u53cd\u65f6\uff0cF1>F2 \u6d6e\u529bF\u6d6e (N) F\u6d6e=G\u7269\u2014G\u89c6 G\u89c6\uff1a\u7269\u4f53\u5728\u6db2\u4f53\u7684\u91cd\u529b \u6d6e\u529bF\u6d6e (N) F\u6d6e=G\u7269 \u6b64\u516c\u5f0f\u53ea\u9002\u7528 \u7269\u4f53\u6f02\u6d6e\u6216\u60ac\u6d6e \u6d6e\u529bF\u6d6e (N) F\u6d6e=G\u6392=m\u6392g=\u03c1\u6db2gV\u6392 G\u6392\uff1a\u6392\u5f00\u6db2\u4f53\u7684\u91cd\u529b m\u6392\uff1a\u6392\u5f00\u6db2\u4f53\u7684\u8d28\u91cf \u03c1\u6db2\uff1a\u6db2\u4f53\u7684\u5bc6\u5ea6 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13\u3001\u5bf9\u4e8e\u4eba\u4f53\u7684\u5b89\u5168\u7535\u538b\uff1a\u226436V\uff08\u4e0d\u9ad8\u4e8e36V\uff09 14\u3001\u52a8\u529b\u7535\u8def\u7684\u7535\u538b\uff1a380V 15\u3001\u5bb6\u5ead\u7535\u8def\u7535\u538b\uff1a220V 16\u3001\u5355\u4f4d\u6362\u7b97\uff1a \uff081\uff09\u30011m/s\uff1d3\uff0e6km/h \uff082\uff09\u30011g/cm3 \uff1d103k
八年级物理公式及单位一.测量的初步知识:长度的主单位m，1km=103 m 1m=10dm=100cm=103mm=106um=109 nm。
简单的运动:公式：v=s/t ( s=vt t=s/v )
单位：1m/s=3.6km/h
平均速度：v=s/t s表示总路程，t表示总时间。
二.《声现象》:听到回声的时间间隔在0.1秒（距离17米）以上，才能听见回声。回声测距离公式s=0.5vt。
三.《质量和密度》:质量单位是千克（kg），吨(t)、克(g)、毫克(mg)。1t=1000kg，1kg=1000g，1g=1000mg
公式：ρ=m/v
单位：1 g/cm3=1000 kg/m3 （体积单位1m3 =106 cm3 1cm3=1ml 1dm3=1L=1000ml）
四.《力》:Ｇ＝ｍｇ，ｍ的单位为kg，Ｇ的单位为N，ｇ＝9.8N/kg。表示质量是1kg的物体受到的重力是9.8N。
二力同线同向F合=F1+F2，合力的方向与这两个力都相同。
二力同线反向F合=F1-F2（F1较大），合力的方向与较大的力相同。
五.《压强 液体的压强》:公式：p=F/S。
单位：N/m 2，它有一个专门的名称，叫帕（Pa）。 （面积单位1m2 =104 cm2）
计算液体压强的公式：p=ρgh h 为深度
液体对容器底的压力不一定等于液体的重力，通常需要求液体的压力 必须用公式F=pS来计算。即： 固体压强：先由F=G 求F 后由P=F/S求P 液体压强：先由P=ρgh求P 后由F=PS 求F。1标准大气压=760mmHg=1.01325×105Pa。
六.浮力:1．浮力产生的原因是物体受到液体对它的向上和向下的压力差。F浮=F向上-F向下
2．秤的示数之差即为浮力的大小。 F浮=G-F
3．浸入液体里的物体受到向上的浮力，浮力的大小等于它排开的液体受到的重力。
F浮=G排=ρ液gV排 公式中各个字母所表示的物理意义：
A、ρ液指的是液体的密度而不是物体的密度；
B、g是定值。一般取10N/kg；
C、V排是指被排开的液体的体积，应等于物体浸入液体中的那部分体积，只有当物体全部浸没在液体中时，V排才等于V物（整个物体的体积）。
浸没在液体中的物体受到两个力的作用：重力和浮力。对于物体是实心的；
当F浮＞G时，物体上浮； ρ物＜ρ液
4．漂浮（上浮的结果 ） F浮=G （V排＜V物） ρ物＜ρ液
5．当F浮=G时，物体悬浮； （ V排=V物） ρ物 =ρ液
当F浮＜G时，物体下沉； ρ物＞ρ液
七. 简单机械:动力×动力臂=阻力×阻力臂，（F1L1=F2L2或F2 / F1=L1 / L2。）
使用滑轮组时，滑轮组用几段绳子吊着物体，提起重物的力就是物重的几分之一。
（F=1/nG S=nh ）
八. 功:功的计算公式：功等于力跟物体在力的方向上通过的距离的乘积。
功=力×距离， W=Fs （单位 F—N S—m W—J）
W有用=Gh W总=FS （ 对于机器 W总=pt ）
η =W有用/W总 =Gh/FS 注意：机械效率一定小于1
公式：功率=功/时间， P=W/t，
单位： 功率的单位是瓦(w)。1w=1J/s；1Kw=1000w
绛旓細鍏勾绾х墿鐞嗗叕寮褰掔撼濡備笅锛1銆侀熷害锛歏=S/t锛宼=s/v锛宻=vt锛宼鏃堕棿锛宻璺▼銆2銆侀噸鍔涳細G=mg锛宮=G/g銆3銆佸瘑搴︼細p=m/V锛寁=m/p锛宮=pv銆侾瀵嗗害v浣撶Нm璐ㄩ噺銆4銆佸帇寮猴細p=F/SF鍘嬪姏Ns鍙楀姏闈㈢Н銆5銆佹恫浣撳帇寮猴細p=P娑瞘h銆6銆佹诞鍔涳細(1)銆侳娴=F鈫-F鈫(鍘嬪姏宸)銆7銆侀樋鍩虹背寰峰師鐞嗭細F娴=G鎺=...
绛旓細32. 鏅鍏紡锛(2)銆丵=UIt=Pt=UQ鐢甸噺=U2t/R (绾數闃诲叕寮)33. 涓茶仈鐢佃矾锛(1)銆両=I1=I2(2)銆乁=U1+U2(3)銆丷=R1+R2(4)銆乁1/U2=R1/R2 (鍒嗗帇鍏紡)(5)銆丳1/P2=R1/R2 34. 骞惰仈鐢佃矾锛(1)銆両=I1+I2(2)銆乁=U1=U2(3)銆1/R=1/R1+1/R2 [ R=R1R2/(R1+R2)](4)銆両...
绛旓細鍏勾绾х墿鐞嗗叕寮濡備笅锛1. 閫熷害锛- 閫熷害 = 璺▼ / 鏃堕棿锛圴 = S/t锛- 鏃堕棿 = 璺▼ / 閫熷害锛坱 = S/V锛- 璺▼ = 閫熷害 脳 鏃堕棿锛坰 = Vt锛- 鏃堕棿锛坱锛夛紝璺▼锛坰锛夛紝閫熷害锛圴锛変箣闂寸殑鍏崇郴銆2. 閲嶅姏锛- 閲嶅姏 = 璐ㄩ噺 脳 閲嶅姏鍔犻熷害锛圙 = mg锛- 璐ㄩ噺 = 閲嶅姏 / 閲嶅姏鍔犻熷害锛坢 = G/...
绛旓細- W = UIt = Pt = UQ (鏅鍏紡)- W = I^2Rt = U^2t/R (绾數闃诲叕寮)- 鐢靛姛鐜囷細- P = W/t = UI (鏅傚叕寮)- P = I^2R = U^2/R (绾數闃诲叕寮)
绛旓細鍏勾绾х墿鐞嗗叕寮鏄涓嬶細涓銆侀熷害鍏紡锛歷=v=sts鎬籺鎬 v鈥斺旈熷害锛坢/s锛塿鈥斺斿钩鍧囬熷害锛坢/s锛塻鈥斺旇矾绋嬶紙m锛塼鈥斺旀椂闂达紙s锛変簩銆佸瘑搴﹀叕寮忥細蟻=mv 蟻鈥斺斿瘑搴︼紙kg/m3锛塵鈥斺旇川閲忥紙kg锛塿鈥斺斾綋绉紙m3锛変笁銆侀噸鍔涘叕寮忥細G=mg G鈥斺旈噸鍔涳紙N锛塵鈥斺旇川閲忥紙kg锛塯鈥斺斿父鏁帮紙9.8N/kg锛夊洓銆佸帇寮...
绛旓細甯哥敤鐨勭墿鐞嗗叕寮忎笌閲嶈鐭ヨ瘑鐐 涓锛鐗╃悊鍏紡(鍗曚綅锛夊叕寮忓娉ㄥ叕寮忕殑鍙樺舰 涓茶仈鐢佃矾鐢垫祦I锛圓锛塈=I1=I2=鈥︹︾數娴佸澶勭浉绛 涓茶仈鐢佃矾鐢靛帇U锛圴锛塙=U1+U2+鈥︹︿覆鑱旂數璺捣鍒嗗帇浣滅敤 涓茶仈鐢佃矾鐢甸樆R锛埼╋級R=R1+R2+鈥︹﹀苟鑱旂數璺數娴両锛圓锛塈=I1+I2+鈥︹﹀共璺數娴佺瓑浜鍚鏀矾鐢垫祦涔嬪拰锛堝垎娴侊級骞惰仈鐢佃矾鐢靛帇U锛...
绛旓細锛1锛夈丵锛滻2Rt鏅鍏紡)锛2锛夈丵锛漊It锛漃t锛漊Q鐢甸噺锛漊2t/R (绾數闃诲叕寮)5銆佷覆鑱旂數璺細锛1锛夈両锛滻1锛滻2 锛2锛夈乁锛漊1锛婾2 锛3锛夈丷锛漅1锛婻2 锛4锛夈乁1/U2锛漅1/R2 (鍒嗗帇鍏紡)锛5锛夈丳1/P2锛漅1/R2 6銆佸苟鑱旂數璺細锛1锛夈両锛滻1锛婭2 锛2锛夈乁锛漊1锛漊2 锛3锛夈1/R锛1/...
绛旓細V鎺捗稸鐗=P鐗┟稰娑诧紙F娴=G锛塚闇裁稸鎺=P娑-P鐗┟稰鐗 V闇裁稸鐗=P娑-P鐗┟稰娑 V鎺=V鐗╂椂锛孏梅F娴=P鐗┟稰娑 鐗╃悊瀹氱悊銆佸畾寰嬨鍏紡琛 涓銆佽川鐐圭殑杩愬姩锛1锛---鐩寸嚎杩愬姩 1锛夊寑鍙橀熺洿绾胯繍鍔 1.骞冲潎閫熷害V骞筹紳s/t锛堝畾涔夊紡锛 2.鏈夌敤鎺ㄨVt2-Vo2锛2as 3.涓棿鏃跺埢閫熷害Vt/2锛漋骞筹紳...
绛旓細鍏勾绾х墿鐞嗘墍鏈鍏紡濡備笅锛氶熷害锛歏=S/t;2銆侀噸鍔涳細G=mg;3銆佸瘑搴︼細蟻=m/V;4銆佸帇寮猴細p=F/S;5銆佹恫浣撳帇寮猴細p=蟻gh銆傚垵涓鐗╃悊鍏紡锛歏=S/t锛汫=mg锛浵=m/V锛沺=F/S锛汸=F/s=蟻gh锛汧1L1=F2L2锛泈=Fs=Gh锛沺=W/t=Fv锛浳=W锛汭=U/R=P/U锛沇=Pt绛夈傞噸鍔涘叕寮廏锛漨g(閫氬父g鍙10N/kg锛...
绛旓細甯哥敤鐨鐗╃悊鍏紡涓庨噸瑕佺煡璇嗙偣 涓锛庣墿鐞嗗叕寮 鐗╃悊閲忥紙鍗曚綅锛 鍏紡 澶囨敞 鍏紡鐨勫彉褰 涓茶仈鐢佃矾 鐢垫祦I锛圓锛 I=I1=I2=鈥︹ 鐢垫祦澶勫鐩哥瓑 涓茶仈鐢佃矾 鐢靛帇U锛圴锛 U=U1+U2+鈥︹ 涓茶仈鐢佃矾璧 鍒嗗帇浣滅敤 涓茶仈鐢佃矾 鐢甸樆R锛埼╋級 R=R1+R2+鈥︹﹀苟鑱旂數璺 鐢垫祦I锛圓锛 I=I1+I2+鈥︹ 骞茶矾鐢垫祦绛変簬鍚 鏀矾...
