Kuis Forum Diskusi Fisika Smp ( Tahap 1 )

Explanation
The correct answer is 1,225 Kg because it is the only value that matches the measurement obtained from the experiment. The other values, 1,045 Kg and 1,045 Kg, do not match the measurement. Therefore, the correct answer is 1,225 Kg.

Explanation
The answer 2,00 gram/cm3 is the correct answer because it represents the density of the irregularly shaped stone. Density is defined as the mass of an object divided by its volume, and it is usually measured in grams per cubic centimeter (g/cm3). In this case, the stone has a density of 2,00 gram/cm3, meaning that for every cubic centimeter of the stone, it has a mass of 2,00 grams.

Explanation
The correct answer suggests that the purpose of the telephone cable installation is to ensure that it does not get disconnected during the night. This implies that the installation is designed to withstand any potential disruptions or interruptions that may occur during nighttime, ensuring uninterrupted communication.

Explanation
The graph shows the heating process of 2 kg of water. To find the heat required for the process from point A to point C, we need to calculate the area under the graph between these two points. The area under the graph represents the heat absorbed by the water. From the graph, we can see that the area between A and C is a triangle with a base of 2 kg and a height of 479 °C. Therefore, the heat required for the process A-C is (1/2) x base x height = (1/2) x 2 kg x 479 °C x 4200 J/kg°C = 958,000 J.

Explanation
Peristiwa gerak lurus berubah beraturan diperlambat terjadi pada gerak batu yang dilempar ke atas dan mobil yang di rem. Ketika batu dilempar ke atas, gerakannya akan berubah dari kecepatan positif menjadi kecepatan negatif saat ketinggian mencapai maksimum. Sedangkan ketika mobil di rem, gerakannya akan melambat dan akhirnya berhenti.

Explanation
The correct answer is "Gerak - listrik - cahaya - kalor". In this scenario, the lamp lights up due to the conversion of mechanical energy (gerak) into electrical energy (listrik). The electrical energy is then converted into light energy (cahaya) by the lamp. Finally, some of the electrical energy is also converted into heat energy (kalor) as a byproduct of the lamp's operation.

Explanation
Rian mendorong motornya dengan gaya 400 N dan motornya bergeser sejauh 5 meter. Usaha dapat dihitung dengan rumus usaha = gaya x jarak. Dalam hal ini, usaha yang dilakukan Rian adalah 400 N x 5 m = 2000 Joule.

Explanation
The tools that are considered as levers are those that can be used to exert force or lift objects by applying a downward force on one end. In this case, the tools numbered 1, 3, 5, 7, and 8 can all be used as levers.

Explanation
Based on the given information, the graph depicts a pattern of vibrating strings that form transverse waves. It is mentioned that points A and B are separated by a distance of 60 cm. The speed of a wave is calculated by dividing the distance traveled by the time taken. Since the time is not given, we can assume that the time taken is the same for both points A and B. Therefore, the speed of the wave can be calculated by dividing the distance of 60 cm by the time taken. Since the distance is given in centimeters and the speed is asked in centimeters per second, the correct answer is 15 cm/s.