2. Berapakah tenaga haba yang diperlukan untuk meningkatkan suhu sebanyak 10°C bagi jisim 0.2 kg emas?
[Diberi nilai muatan haba tentu emas ialah 300 J kg ? °C-"}​

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.