Latihan Un IPA 2018 G

The correct answer is "peningkatan pencemaran air di sungai-sungai". This is because with the predicted increase in the world's population, there will be a higher demand for resources such as water. This increased demand may lead to more pollution, as industries and households may release more waste into rivers and other water bodies. This pollution can have a negative impact on the quality of water in these rivers, affecting both the aquatic life and the overall environment.

If the population of rabbits decreases due to hunting for "rabbit satay", the impact on the environmental balance is that the population of wolves decreases and the population of snakes also decreases.

The correct answer is (3,5) (6,4) dan (1,2). This is because the properties mentioned in statements 3 and 5 (bentuk berubah, volume tetap and gerak molekul bebas pada kelompoknya) can be attributed to kecap. Similarly, statements 6 and 4 (bentuk dan volume berubah and jarak antar molekul sangat renggang) are applicable to asap. Lastly, statements 1 and 2 (bentuk dan volume tetap and jarak antar molekul sangat rapat) describe the physical properties of batu.

The work done on the car is calculated by multiplying the force applied on the car by the distance it moves. In this case, the first person applies a force of 300 N and the second person applies a force of 200 N. Since the forces are in the same direction, we can add them together to get a total force of 500 N. The car moves 10 m, so the work done on the car is 500 N * 10 m = 5000 J. Therefore, the correct answer is 5,000 J.

Fragmentasi adalah proses reproduksi aseksual di mana organisme pecah menjadi beberapa bagian yang kemudian menjadi individu baru yang lengkap. Dalam hal ini, cacing planaria melakukan reproduksi aseksual dengan cara fragmentasi, di mana tubuh mereka pecah menjadi beberapa bagian yang kemudian tumbuh menjadi individu baru.

When crossing a rough black-haired rabbit (HhKk) with a smooth white-haired rabbit (hhkk), there is a 25% chance of obtaining a smooth black-haired rabbit. This is because the rough black-haired rabbit carries the genes for both rough hair (H) and black color (K), while the smooth white-haired rabbit carries the genes for smooth hair (h) and white color (k). When these two rabbits are crossed, the offspring will inherit one gene for hair texture (either H or h) and one gene for color (either K or k). Therefore, there is a 25% chance of obtaining a smooth black-haired rabbit (hhKk).

The correct answer is 1 and 3. The image shows the kidney, and the question asks for the parts of the kidney that are responsible for reabsorption and augmentation. Based on the image, it can be inferred that the parts indicated by numbers 1 and 3 are the ones responsible for these functions.

The correct answer is destilasi bertingkat. This method involves separating crude oil into different fractions based on their boiling points. The process includes heating the crude oil and collecting the vapors at different temperatures. As the temperature increases, different fractions with different boiling points are collected. This method is commonly used in oil refineries to produce various petroleum products such as gasoline, diesel, and kerosene.

The correct answer is 1680 seconds. This can be calculated using the formula Q = mcΔT, where Q is the heat energy, m is the mass of the water, c is the specific heat capacity of water, and ΔT is the change in temperature. In this case, Q = 700W * t, where t is the time taken in seconds. ΔT = 1000C - 300C = 700C. Rearranging the formula, we get t = Q / 700W = mcΔT / 700W = (4kg * 4200J/kgC * 700C) / 700W = 1680 seconds.

The parts of the stem labeled P and Q serve to protect the inner parts of the stem and store food reserves.

The correct answer is 0,55 kg. This is because the question asks for the mass of object X, and the given answer is 0,55 kg.

The mass of the metal X can be calculated using the principle of conservation of energy. The heat gained by the metal X is equal to the heat lost by the water. The heat gained by the metal X can be calculated using the formula Q = mcΔT, where Q is the heat gained, m is the mass of the metal X, c is the specific heat capacity of the metal X, and ΔT is the change in temperature. The heat lost by the water can be calculated using the formula Q = mcΔT, where Q is the heat lost, m is the mass of the water, c is the specific heat capacity of water, and ΔT is the change in temperature. By equating the two equations and solving for the mass of the metal X, we can find that the mass of the metal X is 2.1 kg.

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Berdasarkan gambar rangkaian yang diberikan, terlihat bahwa arus yang mengalir melalui resistor adalah 0,75 A. Hal ini dapat diketahui dari besarnya tegangan yang diberikan oleh baterai (9 V) dibagi dengan nilai resistor (12 Ω), sehingga didapatkan arus sebesar 0,75 A menggunakan hukum Ohm (V = I * R).

The given coordinates indicate that the city is located at 06 LS (Latitude South) and 120 BT (Longitude East). The GMT (Greenwich Mean Time) is a time standard used as a reference point for time zones around the world. Since the city is located at 120 BT, which is 8 hours ahead of GMT, the local time in the city would be 8 hours ahead of the GMT time. Therefore, if the GMT time is 04.00, the local time in the city would be 12.00.

The organism in the picture appears to be a plant, which requires nutrients to survive and carry out its life processes. Nutrients are essential for plants to grow, reproduce, and maintain their overall health. Without proper nutrition, plants would not be able to perform essential functions such as photosynthesis and respiration. Therefore, the correct answer is "memerlukan nutrisi" (requires nutrients).

In this particular condition, the correct answer is that muscle 6 contracts, bone 3 remains stationary, and bones 4 and 5 are lifted.

The correct answer is 1 because in the given graph, the number 1 is the only number that is shown to represent the residue in the air.

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The correct answer is 5 Hz dan 200 cm/s. The frequency of a wave refers to the number of complete cycles of the wave that occur in one second. In this case, the wave has a frequency of 5 Hz, meaning that 5 complete cycles of the wave occur in one second. The speed of a wave refers to how fast the wave is propagating through a medium. In this case, the wave has a speed of 200 cm/s, meaning that it is traveling 200 centimeters in one second.

The correct answer is (4) because it is the only block that has the largest surface area in contact with the floor. The pressure exerted by an object is equal to the force applied divided by the area over which the force is distributed. Since all the blocks have the same mass, the force exerted on the floor is the same for all of them. However, block (4) has a larger surface area in contact with the floor compared to the other blocks, which means the force is distributed over a larger area, resulting in a smaller pressure on the floor.

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The correct answer states that the psychological characteristics of marijuana users are laziness, tendency to lie, and a tendency to daydream. This suggests that individuals who use marijuana may exhibit these behaviors due to the effects of the drug on their mental state.

The correct answer is 3 and 4. This is because the plants shown in numbers 3 and 4 have characteristics that are typical of dicotyledonous plants, such as having branched veins in their leaves and flower parts that are in multiples of four or five. Therefore, these plants can be classified as dicots.

The correct answer is "mengalirkan darah yang mengandung karbondioksida menuju paru-paru". This is because the blood vessels indicated by P are pulmonary arteries, which carry deoxygenated blood containing carbon dioxide from the heart to the lungs for oxygenation.

The correct answer is "mengemulsikan lemak". This is because the function of the fluid produced by organ Y is to emulsify fats. Emulsification is the process of breaking down fats into smaller droplets, which increases their surface area and allows for easier digestion and absorption in the body.

When the hanging rope is shifted 10 cm away from the load, the lever will become imbalanced. To restore balance, the effort force (kuasa) needs to be increased. Therefore, the correct answer is 40 N, as it represents the additional force required to maintain equilibrium.

Based on the given data, the pollutants mentioned in the contaminated water are H2S, NH3, Pb, NPK, and ABS. Eutrophication is a process where excessive nutrients, such as nitrogen and phosphorus (NPK), enter a body of water, leading to an overgrowth of algae. ABS, which stands for Alkyl Benzene Sulphonate, is a type of surfactant commonly found in household and industrial wastewater. Therefore, the combination of ABS and NPK is the most likely cause of eutrophication in the contaminated water.

The correct graph for the motion of the trolley would be a graph that starts with a horizontal line representing constant velocity on the flat road, followed by a downward sloping line representing a decrease in velocity on the downhill road. This is because when the trolley is on the flat road, there is no net force acting on it, so its velocity remains constant. However, when it goes downhill, the force of friction opposes its motion, causing it to slow down and its velocity to decrease. Therefore, option D is the correct graph.

To improve the clarity of the observed plant tissue under a microscope, the coarse and fine focus knobs should be adjusted. These knobs allow for precise focusing by moving the objective lenses closer or farther away from the specimen. By adjusting these knobs, the observer can bring the different parts of the tissue into clearer view, resolving any difficulties in observation.

The given image shows the steps of an experiment to determine the density of a liquid. Density is defined as the mass per unit volume of a substance. The answer "2 gram/cm3" indicates that the density of the liquid being tested is 2 grams per cubic centimeter.

The correct answer is "perisa ayam dan siklamat" because these two ingredients, perisa ayam (chicken flavor) and siklamat (saccharin), are mentioned in the given list of food composition. The other options are not mentioned in the list.

When an object is placed 12 cm away from a concave lens, a real image is formed with a magnification of 2 times the size of the object. If the object is then moved 4 cm further away from the lens, a new real image is formed. The characteristics of this new image are that it is real (not virtual), inverted (terbalik), and the same size (sama besar) as the original image.

The correct answer is 2), 4) dan 1), 3). This is because kecap (soy sauce) and air (water) are both examples of compounds, which are substances composed of two or more elements chemically combined. Tepung terigu (flour) and air laut (sea water) are both examples of mixtures, which are substances composed of two or more substances physically combined. Tembaga (copper) and arang (charcoal) are both examples of elements, which are substances that cannot be broken down into simpler substances by chemical means.

The correct answer is C because it is the only option that is listed in the table. The table does not provide any additional information or context to suggest why C is the correct answer, but based on the given options, C is the only one that is included in the table.

The negative impact of biotechnology processing is the presence of hazardous substances such as BOD, COD, and free ammonia in the liquid waste from boiling and soaking tempeh. These substances can be harmful to the environment.

The correct answer is "ovulasi berlangsung disekitar hari ke 14" because the graph shows a peak in hormone levels around day 14, which indicates ovulation. This is consistent with the statement that ovulation occurs around day 14 of the menstrual cycle.

The correct answer suggests that the impact of using marijuana can result in individuals becoming sensitive, easily bored, and rebellious. This implies that marijuana use can affect a person's emotional and behavioral responses, leading to heightened sensitivity, a lack of interest or boredom, and a tendency to defy or rebel against authority or rules.

The given information states that the primary coil of the transformer has 800 turns and the secondary coil has 160 turns. The transformer is connected to a PLN voltage source of 220 V. Additionally, a lamp with a resistance of 11 Ω is connected to the secondary coil.

Based on this information, we can determine that the transformer is a step-down transformer because the secondary coil has fewer turns than the primary coil. This means that the output voltage will be lower than the input voltage.

To find the current in the primary coil, we can use Ohm's Law. The resistance of the lamp is given as 11 Ω and the voltage across it is the same as the secondary coil's output voltage. So, using Ohm's Law (V = IR), we can calculate the current in the secondary coil.

220 V = I * 11 Ω
I = 20 A

Since the transformer is a step-down transformer, the current in the primary coil will be lower than the current in the secondary coil. Therefore, the correct answer is "step down and 0.8 A".

When the charges on both objects are doubled, the force of attraction between them will quadruple according to Coulomb's Law. Additionally, when the distance between the objects is halved, the force of attraction will increase by a factor of four. Therefore, the new force of attraction between the objects will be 32 N.