Pub Date : 2019-05-01DOI: 10.1201/9780429506437-15
M. McCluskey
B is the magnetic field, v is the velocity of the particle and q is the charge of the particle The .symbol means “cross product”—use right hand rule. Magnitude equation for magnetic force: sin qvB F To get just the magnitude, use just the numerical values for q, v and B, and then multiply by the sin of the angle between v and B. Current carrying wire: sin BIl F , where B is magnetic field, I is current, l is the length of the wire and sin θ is the angle between B and I.
B是磁场，v是粒子的速度，q是粒子的电荷，.符号表示“叉乘”，用右手定则。磁力的大小方程:sin qvB F要得到大小，只需使用q, v和B的数值，然后乘以v和B之间夹角的sin。载电流导线:sin BIl F，其中B是磁场，I是电流，l是导线的长度，sin θ是B和I之间的夹角。
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Pub Date : 2019-05-01DOI: 10.1201/9780429506437-11
M. McCluskey
Negative Expansion Coe cient of Water (4A20.30) -a 2 liter ask of colored water with a glass tube inserted through the stopper is kept in a bath of ice water until the temperature of the water in the ask has fallen to 0° C. The water level in the vertical tube is noted, and the ask and tube are removed from the ice bath. As the temperature of the ask water rises above 0° C, the water level in the tube drops until the water has warmed to about 4° C, the temperature of maximum density, then begins to rise. Demonstrates why ice oats, and always forms at the top surface of the water.
{"title":"Thermodynamics","authors":"M. McCluskey","doi":"10.1201/9780429506437-11","DOIUrl":"https://doi.org/10.1201/9780429506437-11","url":null,"abstract":"Negative Expansion Coe cient of Water (4A20.30) -a 2 liter ask of colored water with a glass tube inserted through the stopper is kept in a bath of ice water until the temperature of the water in the ask has fallen to 0° C. The water level in the vertical tube is noted, and the ask and tube are removed from the ice bath. As the temperature of the ask water rises above 0° C, the water level in the tube drops until the water has warmed to about 4° C, the temperature of maximum density, then begins to rise. Demonstrates why ice oats, and always forms at the top surface of the water.","PeriodicalId":415009,"journal":{"name":"No-Frills Physics","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128438973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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