ก.เส้นรอบวงของโลกในหน่วย km
เส้นรอบวง =
![physics_html_m46858d65[5]](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgHS8pJAXcF10-gqw-ajuJJNqxw75fk4dley5ltMWRwm3bAWAT0dWmi_3-Fk0-u7kyOAZyosdzC7cbqQoZdOBHKqnV7SM7ZE_lmU_56BmAVDJ-NraOV9bROMZJCJ52blu1LH17AqFYx5L0/?imgmax=800 "physics_html_m46858d65[5]"){kind=small}
=![physics_html_75ff3ab0[5]](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh3JAZcjvFX4C90TD_wvQYo7wyEnEUZmAg-HlqjvR1g4scf2mMldF-dL-gIDatqgv6xVHAn3bTbrjDfhtkgvxYcP8uqb7VH-h6wRa1_C9zzHagWt-GW3U-ZSAr0h4ygPZFbDkIPSPYQnbU/?imgmax=800 "physics_html_75ff3ab0[5]"){kind=small}
(6.37x106) = 40023890 = 4x107 m = 4x104 km
ตอบ 4x104 km
ข.พื้นที่ผิวของโลกในหน่วย km2พื้นที่ผิววงกลม =
![physics_html_m5f123969[5]](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjyLDslMS76A51TEnjWKzNmR3NCsFh1_-6kVYo9mBelL6B40H1W24aPdzwEDHxryN3USdgzKuUkhmc-TZOfIrZpz7PzSUtxdTJAkxkIKzIaEZ4aZfp0JJnha_NWBsYxq_4kkurNZm3Wf0c/?imgmax=800 "physics_html_m5f123969[5]"){kind=small}
=![physics_html_75905c8c[5]](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjndAueImFD07NMGAb0s-1XJdM-0pAapX3CF-PnyHLRFtMc3QkXmYZC3AKSDuZzTojpFbxFHgVOnV2tbJzKzqJjPeMegS5ni4Gch8F_r_bmsTKPFbsEgGh22jZD8vx8VM5CjlcZd2PTfvc/?imgmax=800 "physics_html_75905c8c[5]"){kind=small}
(6.37x106)2 = 5.09x1014 m2 = 5.09x108 km2
ตอบ 5.09x108 km2
เฉลยแบบฝึกหัดฟิสิกส์ม.4 (สสวท), คีย์ฟิสิกส์, วิธีทำฟิสิกส์ ม.4
=(6.37x106) = 40023890 = 4x107 m = 4x104 km=(6.37x106)2 = 5.09x1014 m2 = 5.09x108 km2
