Jawapan Buku Teks Fizik Tingkatan 4 Kssm Aktiviti 13 Here

Objective: To determine the specific latent heat of fusion of ice.

Inference: Heat is absorbed by the ice to change its phase from solid to liquid without a change in temperature.

Hypothesis: The higher the mass of ice melted, the more heat is absorbed. The specific latent heat of fusion of ice is constant (approximately 334 J/g).

Variables:

Apparatus / Materials:

Procedure (Summary):

Data & Results (Example): | Heating time, ( t ) (s) | Energy supplied, ( E ) (J) | Mass of ice melted, ( m ) (kg) | |---------------------------|-----------------------------|----------------------------------| | 180 | 18,000 | 0.054 | | 240 | 24,000 | 0.072 | | 300 | 30,000 | 0.090 |

Calculation (for one trial): Using ( E = m l_f ) [ l_f = \fracEm = \frac18,000 \text J0.054 \text kg = 333,333 \text J/kg \approx 3.33 \times 10^5 \text J/kg ]

Analysis: A graph of ( E ) (J) against ( m ) (kg) is plotted. The gradient of the graph equals ( l_f ). The calculated average value is close to the accepted theoretical value of ( 3.34 \times 10^5 ) J/kg.

Discussion:

Conclusion: The specific latent heat of fusion of ice is ( 3.34 \times 10^5 ) J/kg. The hypothesis is accepted. jawapan buku teks fizik tingkatan 4 kssm aktiviti 13

Soalan 1:
Apakah yang dimaksudkan dengan "bahaya sinaran mengion"?

Jawapan:
Sinaran mengion (seperti Sinar-X dan Sinar Gama) mempunyai tenaga yang sangat tinggi sehingga boleh mengeluarkan elektron daripada atom atau molekul. Ini boleh merosakkan DNA sel hidup, menyebabkan mutasi, kanser, atau kematian sel. Oleh itu, pendedahan perlu dikawal selia dengan ketat.

Soalan 2:
Mengapakah kita dinasihatkan menggunakan pelindung matahari (sunscreen) ketika berada di pantai?

Jawapan:
Pelindung matahari mengandungi bahan yang menyerap atau memantulkan sinar Ultralembayung (UV) daripada matahari. Sinaran UV boleh menyebabkan kulit terbakar, penuaan pramatang, dan meningkatkan risiko kanser kulit. Pelindung matahari melindungi lapisan epidermis daripada kerosakan langsung akibat UV-B.

Jika anda mahu, saya boleh:

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Since I do not have the direct physical page in front of me, this write-up is based on the standard Activity 13 topic in the KSSM syllabus: Specific Latent Heat (Haba Pendam Tentu). Most Form 4 Activity 13 experiments involve melting ice or boiling water to determine specific latent heat.

If your Activity 13 is different, please refer to the note at the bottom.

Tujuan: Mengkaji hubungan antara kelajuan zarah dengan frekuensi perlanggaran.

Jawapan / Perbincangan: