3¿Un cable de 20 cm de largo es colocado de forma perpendicular a la dirección de un campo magnético de 0.7 T de intensidad y cuando pasa una corriente desconocida por él, sufre una fuerza de 2.5 N. Calcula el valor de la corriente que pasa por dicho cable?  ​

25) a student takes four samples of a white crystalline solid and places each in a well plate. on top of each sample, she carefully places 20 drops of clear mystery liquids a, b, c and d. her results for each well are: liquid a: the solid dissolves quickly. liquid b: the solid appears unchanged. liquid c: a brownish colored liquid is produced. liquid d: fizzing occurs and the well becomes warmer. in which well does a physical change occur?

Why did rutherford say that bombarding atoms with particles was like "playing with marbles" what

Number and variety of living organisms includes genetic, species, and ecological types