初中物理计算热量的公式是怎么推导出来的？ 初中物理公式及推导公式
\u521d\u4e2d\u7269\u7406\u8ba1\u7b97\u70ed\u91cf\u7684\u516c\u5f0f\u662f\u600e\u4e48\u63a8\u5bfc\u51fa\u6765\u7684\u8868\u793a\u5dee\u91cf\uff0c\u6bd4\u65b9\u8bf4\u539f\u5148\u67d0\u6db2\u4f53\u7684\u8d28\u91cf\u4e3am\uff0c\u589e\u52a0\u4e86\u4e00\u4e9b\u540e\uff0c\u8d28\u91cf\u53d8\u4e3am'\uff0c\u90a3\u4e48\u589e\u52a0\u7684\u8d28\u91cf\u79f0\u4e3a\u4e09\u89d2\u5f62m(\u624b\u673a\u6253\u4e0d\u51fa\u4e09\u89d2\uff0c\u62b1\u6b49\uff0c\u5176\u5b9e\u8fd9\u4e2a\u4e09\u89d2\u8bfb\u6cd5\u4e0e\u6570\u5b66\u4e2db^2-4ac\u6539\u53d8\u7684\u8bfb\u97f3\u76f8\u540c\u3002\u989d\u3001\u8c10\u97f3\u201c\u86cb\u5854\u201d)
C\u4e59\uff1eC\u7532 \u7b80\u5355\u70b9\u8bf4\u5c31\u662f\u63a7\u5236\u53d8\u91cf\uff0c\u552f\u4e00\u53d8\u7684\u662f\u6c34\u7684\u672b\u6e29\uff0c\u6c34\u6e29\u5ea6\u5347\u7684\u8d8a\u9ad8\uff0c\u8bf4\u660e\u5438\u6536\u70ed\u91cf\u8d8a\u591a\u3002\u4e5f\u5c31\u662f\u4e59\u653e\u51fa\u70ed\u91cf\u591a\uff0c\u5982\u679c\u4f60\u4f1a\u70b9\u6bd4\u70ed\u5bb9\u77e5\u8bc6\u7684\u8bdd\uff0c\u73b0\u5728\u5c31\u5e94\u8be5\u77e5\u9053\u4e86\u3002\u53ef\u4ee5\u7528Q=cm t\uff08\u4e0d\u597d\u610f\u601d\uff0ct\u524d\u7684\u7b26\u53f7\u6253\u4e0d\u51fa\u6765\uff0c\u4f60\u660e\u767d\u5c31\u884c\u3002\uff09\u6765\u63a8\u7b97\u3002 \u6ca1\u9519\u554a\uff1f
\u901f\u5ea6 \u03c5= S / t 1m / s = 3.6 Km / h
\u58f0\u901f\u03c5= 340m / s
\u5149\u901fC = 3\u00d7108 m /s
\u5bc6\u5ea6 \u03c1= m / V 1 g / c m3 = 103 Kg / m3
\u5408\u529b F = F1 - F2
F = F1 + F2 F1\u3001F2\u5728\u540c\u4e00\u76f4\u7ebf\u7ebf\u4e0a\u4e14\u65b9\u5411\u76f8\u53cd
F1\u3001F2\u5728\u540c\u4e00\u76f4\u7ebf\u7ebf\u4e0a\u4e14\u65b9\u5411\u76f8\u540c
\u538b\u5f3a p = F / S
p =\u03c1g h p = F / S\u9002\u7528\u4e8e\u56fa\u3001\u6db2\u3001\u6c14
p =\u03c1g h\u9002\u7528\u4e8e\u7ad6\u76f4\u56fa\u4f53\u67f1
p =\u03c1g h\u53ef\u76f4\u63a5\u8ba1\u7b97\u6db2\u4f53\u538b\u5f3a
1\u6807\u51c6\u5927\u6c14\u538b = 76 cmHg\u67f1 = 1.01\u00d7105 Pa = 10.3 m\u6c34\u67f1
\u6d6e\u529b \u2460 F\u6d6e = G \u2013 F
\u2461\u6f02\u6d6e\u3001\u60ac\u6d6e\uff1aF\u6d6e = G
\u2462 F\u6d6e = G\u6392 =\u03c1\u6db2g V\u6392
\u2463\u636e\u6d6e\u6c89\u6761\u4ef6\u5224\u6d6e\u529b\u5927\u5c0f \uff081\uff09\u5224\u65ad\u7269\u4f53\u662f\u5426\u53d7\u6d6e\u529b
\uff082\uff09\u6839\u636e\u7269\u4f53\u6d6e\u6c89\u6761\u4ef6\u5224\u65ad\u7269\u4f53\u5904
\u4e8e\u4ec0\u4e48\u72b6\u6001
\uff083\uff09\u627e\u51fa\u5408\u9002\u7684\u516c\u5f0f\u8ba1\u7b97\u6d6e\u529b
\u7269\u4f53\u6d6e\u6c89\u6761\u4ef6\uff08\u524d\u63d0\uff1a\u7269\u4f53\u6d78\u6ca1\u5728\u6db2\u4f53\u4e2d\u4e14\u53ea\u53d7\u6d6e\u529b\u548c\u91cd\u529b\uff09\uff1a
\u2460F\u6d6e\uff1eG\uff08\u03c1\u6db2\uff1e\u03c1\u7269\uff09\u4e0a\u6d6e\u81f3\u6f02\u6d6e \u2461F\u6d6e =G\uff08\u03c1\u6db2\u3000=\u03c1\u7269\uff09\u60ac\u6d6e
\u2462F\u6d6e \uff1c G\uff08\u03c1\u6db2 \uff1c \u03c1\u7269\uff09\u4e0b\u6c89
\u6760\u6746\u5e73\u8861\u6761\u4ef6 F1 L1 = F2 L 2 \u6760\u6746\u5e73\u8861\u6761\u4ef6\u4e5f\u53eb\u6760\u6746\u539f\u7406
\u6ed1\u8f6e\u7ec4 F = G / n
F =\uff08G\u52a8 + G\u7269\uff09/ n
SF = n SG \u7406\u60f3\u6ed1\u8f6e\u7ec4
\u5ffd\u7565\u8f6e\u8f74\u95f4\u7684\u6469\u64e6
n\uff1a\u4f5c\u7528\u5728\u52a8\u6ed1\u8f6e\u4e0a\u7ef3\u5b50\u80a1\u6570
\u529f W = F S = P t 1J = 1N�6�1m = 1W�6�1s
\u529f\u7387 P = W / t = F\u03c5 1KW = 103 W\uff0c1MW = 103KW
\u6709\u7528\u529f W\u6709\u7528 = G h\uff08\u7ad6\u76f4\u63d0\u5347\uff09= F S\uff08\u6c34\u5e73\u79fb\u52a8\uff09= W\u603b \u2013 W\u989d =\u03b7W\u603b
\u989d\u5916\u529f W\u989d = W\u603b \u2013 W\u6709 = G\u52a8 h\uff08\u5ffd\u7565\u8f6e\u8f74\u95f4\u6469\u64e6\uff09= f L\uff08\u659c\u9762\uff09
\u603b\u529f W\u603b= W\u6709\u7528+ W\u989d = F S = W\u6709\u7528 / \u03b7
\u673a\u68b0\u6548\u7387 \u03b7= W\u6709\u7528 / W\u603b
\u03b7=G /\uff08n F\uff09
= G\u7269 /\uff08G\u7269 + G\u52a8\uff09 \u5b9a\u4e49\u5f0f
\u9002\u7528\u4e8e\u52a8\u6ed1\u8f6e\u3001\u6ed1\u8f6e\u7ec4
\u4e2d\u8003\u7269\u7406\u6240\u6709\u7684\u516c\u5f0f
\u7279\u70b9\u6216\u539f\u7406 \u4e32\u8054\u7535\u8def \u5e76\u8054\u7535\u8def
\u65f6\u95f4\uff1at t=t1=t2 t=t1=t2
\u7535\u6d41\uff1aI I = I 1= I 2 I = I 1+ I 2
\u7535\u538b\uff1aU U = U 1+ U 2 U = U 1= U 2
\u7535\u8377\u91cf\uff1aQ\u7535 Q\u7535= Q\u75351= Q\u75352 Q\u7535= Q\u75351+ Q\u75352
\u7535\u963b\uff1aR R = R 1= R 2 1/R=1/R1+1/R2 [R=R1R2/(R1+R2)]
\u7535\u529f\uff1aW W = W 1+ W 2 W = W 1+ W 2
\u7535\u529f\u7387\uff1aP P = P 1+ P 2 P = P 1+ P 2
\u7535\u70ed\uff1aQ\u70ed Q\u70ed= Q\u70ed1+ Q\u70ed 2 Q\u70ed= Q\u70ed1+ Q\u70ed 2
\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
\uff08N\uff09 G=mg m\uff1a\u8d28\u91cf
g\uff1a9.8N/kg\u6216\u800510N/kg
\u5bc6\u5ea6\u03c1
\uff08kg/m3\uff09 \u03c1=
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
\uff08w\uff09 P=
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\u6ce2\u901f\uff08\u7535\u78c1\u6ce2\u7684\u6ce2\u901f\u662f\u4e0d\u53d8\u7684\uff0c\u7b49\u4e8e3\u00d7108m/s\uff09
\u03bb\uff1a\u6ce2\u957f \u03bd\uff1a\u9891\u7387
\u4e8c\uff0e\u77e5\u8bc6\u70b9
1\uff0e \u9700\u8981\u8bb0\u4f4f\u7684\u51e0\u4e2a\u6570\u503c\uff1a
a\uff0e\u58f0\u97f3\u5728\u7a7a\u6c14\u4e2d\u7684\u4f20\u64ad\u901f\u5ea6\uff1a340m/s b\u5149\u5728\u771f\u7a7a\u6216\u7a7a\u6c14\u4e2d\u7684\u4f20\u64ad\u901f\u5ea6\uff1a3\u00d7108m/s
c\uff0e\u6c34\u7684\u5bc6\u5ea6\uff1a1.0\u00d7103kg/m3 d\uff0e\u6c34\u7684\u6bd4\u70ed\u5bb9\uff1a4.2\u00d7103J/\uff08kg�6�1\u2103\uff09
e\uff0e\u4e00\u8282\u5e72\u7535\u6c60\u7684\u7535\u538b\uff1a1.5V f\uff0e\u5bb6\u5ead\u7535\u8def\u7684\u7535\u538b\uff1a220V
g\uff0e\u5b89\u5168\u7535\u538b\uff1a\u4e0d\u9ad8\u4e8e36V
2\uff0e \u5bc6\u5ea6\u3001\u6bd4\u70ed\u5bb9\u3001\u70ed\u503c\u5b83\u4eec\u662f\u7269\u8d28\u7684\u7279\u6027\uff0c\u540c\u4e00\u79cd\u7269\u8d28\u8fd9\u4e09\u4e2a\u7269\u7406\u91cf\u7684\u503c\u4e00\u822c\u4e0d\u6539\u53d8\u3002\u4f8b\u5982\uff1a\u4e00\u676f\u6c34\u548c\u4e00\u6876\u6c34\uff0c\u5b83\u4eec\u7684\u7684\u5bc6\u5ea6\u76f8\u540c\uff0c\u6bd4\u70ed\u5bb9\u4e5f\u662f\u76f8\u540c\uff0c
3\uff0e\u5e73\u9762\u955c\u6210\u7684\u7b49\u5927\u7684\u865a\u50cf\uff0c\u50cf\u4e0e\u7269\u4f53 \u5173\u4e8e\u5e73\u9762\u955c\u5bf9\u79f0\u3002
3\uff0e \u58f0\u97f3\u4e0d\u80fd\u5728\u771f\u7a7a\u4e2d\u4f20\u64ad\uff0c\u800c\u5149\u53ef\u4ee5\u5728\u771f\u7a7a\u4e2d\u4f20\u64ad\u3002
4\uff0e \u8d85\u58f0\uff1a\u9891\u7387\u9ad8\u4e8e2000\u7684\u58f0\u97f3\uff0c\u4f8b\uff1a\u8759\u8760\uff0c\u8d85\u58f0\u96f7\u8fbe\uff1b
5\uff0e \u6b21\u58f0\uff1a\u706b\u5c71\u7206\u53d1\uff0c\u5730\u9707\uff0c\u98ce\u7206\uff0c\u6d77\u5578\u7b49\u80fd\u4ea7\u751f\u6b21\u58f0\uff0c\u6838\u7206\u70b8\uff0c\u5bfc\u5f39\u53d1\u5c04\u7b49\u4e5f\u80fd\u4ea7\u751f\u6b21\u58f0\u3002
6\uff0e \u5149\u5728\u540c\u4e00\u79cd\u5747\u5300\u4ecb\u8d28\u4e2d\u6cbf\u76f4\u7ebf\u4f20\u64ad\u3002\u5f71\u5b50\u3001\u5c0f\u5b54\u6210\u50cf\uff0c\u65e5\u98df\uff0c\u6708\u98df\u90fd\u662f\u5149\u6cbf\u76f4\u7ebf\u4f20\u64ad\u5f62\u6210\u7684\u3002
7\uff0e \u5149\u53d1\u751f\u6298\u5c04\u65f6\uff0c\u5728\u7a7a\u6c14\u4e2d\u7684\u89d2\u603b\u662f\u7a0d\u5927\u4e9b\u3002\u770b\u6c34\u4e2d\u7684\u7269\uff0c\u770b\u5230\u7684\u662f\u53d8\u6d45\u7684\u865a\u50cf\u3002
8\uff0e \u51f8\u900f\u955c\u5bf9\u5149\u8d77\u4f1a\u805a\u4f5c\u7528\uff0c\u51f9\u900f\u955c\u5bf9\u5149\u8d77\u53d1\u6563\u4f5c\u7528\u3002
9\uff0e \u51f8\u900f\u955c\u6210\u50cf\u7684\u89c4\u5f8b\uff1a\u7269\u4f53\u57282\u500d\u7126\u8ddd\u4e4b\u5916\u6210\u7f29\u5c0f\u3001\u5012\u7acb\u7684\u5b9e\u50cf\u3002\u57282\u500d\u7126\u8ddd\u4e0e1\u500d\u7126\u8ddd\u4e4b\u95f4\uff0c\u6210\u5012\u7acb\u3001\u653e\u5927\u7684\u5b9e\u50cf\u3002 \u57281\u500d \u7126\u8ddd\u4e4b\u5185 \uff0c\u6210\u6b63\u7acb\uff0c\u653e\u5927\u7684\u865a\u50cf\u3002
10\uff0e\u6ed1\u52a8\u6469\u64e6\u5927\u5c0f\u4e0e\u538b\u529b\u548c\u8868\u9762\u7684\u7c97\u7cd9\u7a0b\u5ea6\u6709\u5173\u3002\u6eda\u52a8\u6469\u64e6\u6bd4\u6ed1\u52a8\u6469\u64e6\u5c0f\u3002
11\uff0e\u538b\u5f3a\u662f\u6bd4\u8f83\u538b\u529b\u4f5c\u7528\u6548\u679c\u7684\u7269\u7406\u91cf\uff0c\u538b\u529b\u4f5c\u7528\u6548\u679c\u4e0e\u538b\u529b\u7684\u5927\u5c0f\u548c\u53d7\u529b\u9762\u79ef\u6709\u5173\u3002
12\uff0e\u8f93\u9001\u7535\u538b\u65f6\uff0c\u8981\u91c7\u7528\u9ad8\u538b\u8f93\u9001\u7535\u3002\u539f\u56e0\u662f\uff1a\u53ef\u4ee5\u51cf\u5c11\u7535\u80fd\u5728\u8f93\u9001\u7ebf\u8def\u4e0a\u7684\u635f\u5931\u3002
13\uff0e\u7535\u52a8\u673a\u7684\u539f\u7406\uff1a\u901a\u7535\u7ebf\u5708\u5728\u78c1\u573a\u4e2d\u53d7\u529b\u800c\u8f6c\u52a8\u3002\u662f\u7535\u80fd\u8f6c\u5316\u4e3a\u673a\u68b0\u80fd \u3002
14\uff0e\u53d1\u7535\u673a\u7684\u539f\u7406\uff1a\u7535\u78c1\u611f\u5e94\u73b0\u8c61\u3002\u673a\u68b0\u80fd\u8f6c\u5316\u4e3a\u7535\u80fd\u3002\u8bdd\u7b52\uff0c\u53d8\u538b\u5668\u662f\u5229\u7528\u7535\u78c1\u611f\u5e94\u539f\u7406\u3002
15\uff0e\u5149\u7ea4\u662f\u4f20\u8f93\u5149\u7684\u4ecb\u8d28\u3002
16\uff0e\u78c1\u611f\u5e94\u7ebf\u662f\u4ece\u78c1\u4f53\u7684N\u6781\u53d1\u51fa\uff0c\u6700\u540e\u56de\u5230S\u6781 \u56de\u7b54\u8005\uff1a \u70ed\u5fc3\u7f51\u53cb | 2011-6-5 19:57
\u521d\u4e2d\u7269\u7406\u6982\u5ff5\u6c47\u603b
\u7269\u7406\u91cf\u540d\u79f0 \u7269\u7406\u91cf\u7b26\u53f7 \u5355\u4f4d\u540d\u79f0 \u5355\u4f4d\u7b26\u53f7 \u516c\u5f0f
\u8d28\u91cf m \u5343\u514b kg m=\u03c1v
\u6e29\u5ea6 t \u6444\u6c0f\u5ea6 \u00b0C
\u901f\u5ea6 v \u7c73\uff0f\u79d2 m/s v=s/t
\u5bc6\u5ea6 p \u5343\u514b\uff0f\u7c73�0�6 kg/m�0�6 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 \u03a9 R=U/I
\u7535\u529f W \u7126\u8033\uff08\u7126\uff09 J W=UI t
\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\u25b3t
\u6bd4\u70ed c \u7126\u6bcf\u5343\u514b\u6444\u6c0f\u5ea6 J/(kg�6�1\u00b0C) c\uff1dQ/m\u25b3t
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\u771f\u7a7a\u4e2d\u5149\u901f 3\u00d710^8\u7c73\uff0f\u79d2
g 9.8\u725b\u987f\uff0f\u5343\u514b
15\u00b0C\u7a7a\u6c14\u4e2d\u58f0\u901f 340\u7c73\uff0f\u79d2
\u5b89\u5168\u7535\u538b \u4e0d\u9ad8\u4e8e36\u4f0f
-------------------------------------------
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b \u6bd4\u8f83\u901a\u8fc7\u76f8\u7b49\u8def\u7a0b\u6240\u9700\u7684\u65f6\u95f4\u3002
\u2461\u516c\u5f0f\uff1a v=s/t
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\u91cd\u529b\u548c\u8d28\u91cf\u5173\u7cfb\uff1aG=mg m=G/g
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最初是在18世纪，苏格兰的物理学家兼化学家J.布莱克发明质量雷同的差别物质，上升到雷同温度所需的热量差别，而提出了比热容的见解。险些任何物质皆可丈量比热容，如化学元素、化合物、合金、溶液，以及复合质料。 汗青上，曾以水的比热来定义热量，将1克水升高1度所需的热量定义为1卡路里。设有一质量为m的物体，在某一进程中吸取（或放出）热量ΔQ时，温度升高（或低落）ΔT，则ΔQ/ΔT称为物体在此进程中的热容量（简称热容），用C表现，即C=ΔQ/ΔT。用热容除以质量，即得比热容c=C/m=ΔQ/mΔT。对付微小进程的热容和比热容，分别有C=dQ/dT，c=1/m*dQ/dT。因此，在物体温度由T1变革到T2的有限进程中，吸取（或放出）的热量Q=∫（T2,T1）CdT=m∫（T2,T1）cdT。一样平常环境下，热容与比热容均为温度的函数，但在温度变革范畴不太大时，可雷同地看为常量。于是有Q=C(T2-T1）=mc(T2-T1）。如令温度变化量ΔT=T2-T1，则有Q=cmΔT。这是中学中用比热容来谋略热量的根本公式。
最初是在18世纪，苏格兰的物理学家兼化学家J.布莱克发现质量相同的不同物质，上升到相同温度所需的热量不同，而提出了比热容的概念。几乎任何物质皆可测量比热容，如化学元素、化合物、合金、溶液，以及复合材料。历史上，曾以水的比热来定义热量，将1克水升高1度所需的热量定义为1卡路里。设有一质量为m的物体，在某一过程中吸收（或放出）热量ΔQ时，温度升高（或降低）ΔT，则ΔQ/ΔT称为物体在此过程中的热容量（简称热容），用C表示，即C=ΔQ/ΔT。用热容除以质量，即得比热容c=C/m=ΔQ/mΔT。对于微小过程的热容和比热容，分别有C=dQ/dT，c=1/m*dQ/dT。因此，在物体温度由T1变化到T2的有限过程中，吸收（或放出）的热量Q=∫（T2,T1）CdT=m∫（T2,T1）cdT。一般情况下，热容与比热容均为温度的函数，但在温度变化范围不太大时，可近似地看为常量。于是有Q=C(T2-T1）=mc(T2-T1）。如令温度改变量ΔT=T2-T1，则有Q=cmΔT。
这是中学中用比热容来计算热量的基本公式。在英文中，比热容被称为：Specific Heat Capacity(SHC）。用比热容计算热能的公式为：Energy=Mass×Specific Heat Capacity×Temperature change可简写为：Energy=SHC×Mass×Temp Ch，Q=cmΔT。与比热相关的热量计算公式：Q=cmΔT 即Q吸（放）=cm(T初-T末） 其中c为比热，m为质量，Q为能量热量。吸热时为Q=cmΔT升（用实际升高温度减物体初温），放热时为Q=cmΔT降（用实际初温减降后温度）。或者Q=cmΔT=cm(T末-T初），Q>0时为吸热，Q<0时为放热。（涉及到物态变化时的热量计算不能直接用Q=cmΔT，因为不同物质的比热容一般不同，发生物态变化后，物质的比热容变化了。）
表示差量，比方说原先某液体的质量为m，增加了一些后，质量变为m'，那么增加的质量称为三角形m(手机打不出三角，抱歉，其实这个三角读法与数学中b^2-4ac改变的读音相同。额、谐音“蛋塔”)
C乙＞C甲 简单点说就是控制变量，唯一变的是水的末温，水温度升的越高，说明吸收热量越多。也就是乙放出热量多，如果你会点比热容知识的话，现在就应该知道了。可以用Q=cm t（t前的符号打不出来）来推算。用比热容谋略热能的公式为：Energy=Mass×SpecificHeatCapacity×Temperaturechange可简写为：Energy=SHC×Mass×TempCh，Q=cmΔT。与比热相干的热量谋略公式：Q=cmΔT即Q吸（放）=cm(T初-T末）此中c为比热，m为质量，Q为能量热量。吸热时为Q=cmΔT升（用实际升高温度减物体初温），放热时为Q=cmΔT降（用实际初温减降后温度）。大概Q=cmΔT=cm(T末-T初），Q0时为吸热，Q0时为放热。
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