5. Dua buah kereta saling mendekati dengan laju yang sama. Salah satu pesawat membunyikan suara dengan frekuensi tertentu dan masinis yang lain mendengar dengan frekuensi 1,5 kalinya. Jika kecepatan bunyi di udara 340 m/s, maka kecepatan masing-masing adalah ... m/s. d. 68 b. 30 a. 20 e. 80 c. 50

Greenhouse gases are naturally occurring gases that are also produced as a result of human consumption, such as the burning of fossil fuels. They are essential to life in that a gas such as carbon dioxide (Co2) is essential to photosynthesis and the production of oxygen which helps to sustain life. However, the levels of greenhouse gases are far outreaching their natural limits and are having a negative impact on human and animal life.

Answered by Gibbs | 2024-06-10

TRUE
Greenhouse gases , such as carbon dioxide and methane, trap heat in the Earth's atmosphere, a necessary process known as the greenhouse effect. This keeps our planet warm enough to support life. ;

Answered by GuyPearce | 2024-06-18

The statement that greenhouse gases are essential to support life on Earth is true. They regulate the planet's temperature by trapping heat and are critical for processes like photosynthesis. However, human activities are causing their levels to rise, leading to climate change.
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Answered by Gibbs | 2024-09-25

Penyelesaian[tex]f' = f \frac{v_{bunyi} + v_{pengamat}}{v_{bunyi} - v_{sumber}}[/tex][tex]v_{pengamat} = v ~(kereta ~2)[/tex][tex]v_{sumber} = v~ (kereta ~1)[/tex][tex]f' = f \frac{v_{bunyi} + v}{v_{bunyi} - v}[/tex][tex]1,5f = f \frac{v_{bunyi} + v}{v_{bunyi} - v}[/tex][tex]1,5 = \frac{v_{bunyi} + v}{v_{bunyi} - v}[/tex][tex]1,5(v_{bunyi} - v) = v_{bunyi} + v[/tex][tex]1,5v_{bunyi} - 1,5v = v_{bunyi} + v[/tex][tex]1,5v_{bunyi} - v_{bunyi} = v + 1,5v[/tex][tex]0,5v_{bunyi} = 2,5v[/tex][tex]v = \frac{0,5v_{bunyi}}{2,5}[/tex][tex]= \frac{0,5}{2,5} v_{bunyi}[/tex][tex]= 0,2 v_{bunyi}[/tex][tex]= 0,2 \times 340[/tex][tex]= 68 \text{ m/s}[/tex]

Answered by vinganzbeut | 2025-07-20