Latihan Un IPA 2018 K

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 can lead to more pollution in rivers and other water bodies due to factors such as industrial waste, agricultural runoff, and improper waste management. As a result, the quality of water in rivers is likely to deteriorate, leading to an increase in water pollution.

The correct answer is "disaring oleh rambut hidung, diatur suhu dan kelembabannya". This is because when air enters the nasal cavity, it is filtered by the hairs in the nose, which trap large particles and prevent them from entering further into the respiratory system. Additionally, the air is also regulated in terms of temperature and humidity to ensure that it is at the optimal conditions for the respiratory system to function properly.

The work done on an object is equal to the force applied to the object multiplied by the distance the object moves in the direction of the force. In this case, there are two forces acting on the car, 300 N and 200 N. The car moves 10 m in the direction of the forces. To calculate the total work done on the car, we can add the work done by each force. The work done by the 300 N force is 300 N * 10 m = 3000 J. The work done by the 200 N force is 200 N * 10 m = 2000 J. Adding these two values together, we get a total work done of 3000 J + 2000 J = 5000 J. Therefore, the correct answer is 5,000 J.

When the population of rabbits decreases due to hunting for "rabbit satay", it will have a negative impact on the balance of the ecosystem. This is because rabbits are prey for wolves, and if the rabbit population declines, the wolf population will also decrease. As a result, the population of snakes, which are predators of rabbits, will also decrease. Therefore, the correct answer is "serigala menurun, populasi ular menurun" which means "wolf population decreases, snake population decreases".

The correct answer is (3) dan (4). The given observations indicate the chemical properties of the substances. The ability to conduct electricity and high flexibility are physical properties, while rusting and decay are chemical processes that indicate the reactivity of the substances. Therefore, (3) dan (4) are the correct options.

The correct answer is (3,5) (6,4) dan (1,2). This answer correctly matches the physical properties described in the question. The properties of kecap, asap, and batu are that their shape and volume change, the distance between molecules is very far apart, and the molecules move freely within their groups. These properties are represented by the statement (3,5) (6,4) dan (1,2).

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, c is the specific heat capacity, and ΔT is the change in temperature. In this case, the heat energy required to heat the water from 300C to 1000C can be calculated as Q = (4 kg)(4200 J/kg°C)(1000C - 300C). Solving for Q, we get Q = 4,200,000 J. The power of the water heater is given as 700 W, which means it can provide 700 J of heat energy per second. Therefore, the time required to heat the water can be calculated as 4,200,000 J / 700 J/s = 1680 seconds.

Fragmentasi adalah proses reproduksi aseksual di mana organisme terbagi menjadi beberapa bagian yang kemudian tumbuh menjadi organisme baru yang lengkap. Dalam konteks cacing Planaria, mereka dapat membelah tubuh mereka menjadi dua atau lebih bagian yang kemudian dapat tumbuh menjadi individu baru yang lengkap. Oleh karena itu, fragmentasi adalah cara reproduksi aseksual yang dilakukan oleh cacing Planaria.

The parts of the stem indicated by the letters P and Q serve the function of protecting the inner parts of the stem and storing food reserves.

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

Based on the circuit diagram, the current flowing through the battery pole can be calculated using Ohm's Law, which states that current (I) is equal to voltage (V) divided by resistance (R). In this case, the voltage is 3 volts and the resistance is 4 ohms. Therefore, the current flowing through the battery pole is 0.75 A.

When a rough-haired black rabbit (HhKk) is crossed with a smooth-haired white rabbit (hhkk), the offspring will inherit one allele for hair texture from each parent. The possible combinations are Hhkk and hhKk, resulting in 25% of the offspring having smooth black fur.

Based on the given options, the mass of object X is 0.55 kg.

The correct answer is 2 and 3. This means that the correct pair of fundamental quantities, SI units, and measuring instruments is indicated by option 2 and 3 in the given table. However, without the actual table or any context provided, it is difficult to provide a specific explanation for this answer.

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The correct answer is "memerlukan nutrisi". This is because the organism shown in the picture is a living organism, and all living organisms require nutrients to survive and carry out their life processes. Nutrients provide energy and building blocks for growth, development, and maintenance of the organism's body. Therefore, the characteristic of needing nutrients is a fundamental aspect of living organisms.

The correct answer is 1 and 3 because in the given image, the parts labeled 1 and 3 are the ones responsible for reabsorption and augmentation in the kidney.

Gambar menunjukkan organisme yang termasuk kelompok Mollusca adalah yang ditunjukkan oleh nomor 1 dan 2.

Based on the measurements and the density table of metals, the metal M is most likely zinc.

When the hanging rope is shifted 10 cm away from the load, the lever will become unbalanced. To restore balance, the effort force (kuasa) needs to be increased. Therefore, the correct answer is 40 N, as it is the only option that represents an increase in force.

The correct answer is "otot 6 berkontraksi, tulang 3 diam dan tulang 4 dan 5 terangkat". In this situation, the muscles (otot 6) contract, causing the bones 4 and 5 to be lifted, while bone 3 remains still. This suggests that the movement of the joint is primarily controlled by the contraction of muscle 6 and the interaction between bones 3, 4, and 5.

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 "pemalas, suka berbohong, dan suka menghayal". This is because the question is asking for the psychological characteristics of marijuana users. These characteristics, such as laziness, tendency to lie, and excessive daydreaming, are commonly associated with the use of marijuana.

When NaHCO3 (sodium bicarbonate) is dissolved in water and exposed to sunlight, it undergoes a chemical reaction called photosynthesis. During photosynthesis, plants like Hydrilla use sunlight energy to convert carbon dioxide (CO2) and water into glucose and oxygen. Therefore, it can be concluded that Hydrilla performs photosynthesis and the amount of gas (oxygen) produced increases.

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 large fat molecules into smaller droplets, which makes it easier for enzymes to digest and absorb them in the digestive system.

The correct answer is 3 and 4. Based on the given image, the plants indicated by numbers 3 and 4 belong to the group of dicots. This can be determined by observing the characteristics of the plants such as the presence of two cotyledons (seed leaves), net-like veins on the leaves, and flower parts in multiples of four or five. Therefore, the plants indicated by numbers 3 and 4 are dicots.

The correct answer is "mengalirkan darah yang mengandung karbondioksida menuju paru-paru". This is because the arrow in the picture is pointing towards the lungs, indicating that it is the direction in which the blood carrying carbon dioxide is flowing.

The correct answer is 5 Hz dan 200 cm/s. This is because the frequency of a wave refers to the number of complete cycles of the wave that occur in one second, and in this case, the wave has a frequency of 5 Hz. The speed of propagation of a wave refers to how fast the wave is moving through a medium, and in this case, the wave is propagating at a speed of 200 cm/s.

The correct answer is 1, 2, 6, 3, 4, and 5.

The given data mentions that the polluted water contains H2S, NH3, Pb, NPK, and ABS. Eutrophication is the excessive growth of algae in water bodies due to an increase in nutrients, particularly nitrogen and phosphorus. ABS (Alkyl Benzene Sulphonat) and NPK (a combination of nitrogen, phosphorus, and potassium) are both nutrient sources that can contribute to eutrophication. Therefore, ABS and NPK are the likely causes of eutrophication in this scenario.

The correct answer is D because the graph shows a steady decrease in velocity over time, indicating that the trolley is slowing down while moving on a downhill road. This suggests that there is a force acting against the motion of the trolley, which is likely the friction force.

The substances listed in options 2), 4), 1), and 3) are all compounds and mixtures. Kecap and air are examples of mixtures, while tepung terigu and air laut are examples of compounds. Tembaga and arang are elements, not compounds or mixtures.

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

When an object is placed 12 cm away from a convex lens and a real image is formed with a magnification of 2, it means that the image is the same size as the object and is inverted. If the object is then shifted 4 cm away from the lens, the new image formed will still be real, inverted, and the same size as the object. Therefore, the correct answer is "nyata, terbalik, sama besar."

When the charges of both objects are doubled, the force of attraction between them will also double according to Coulomb's law. Additionally, when the distance between the objects is halved, the force of attraction will quadruple. Therefore, the force of attraction between the two objects will be 2N * 2 * 4 = 32N.

The correct answer is C because it is the only option that is listed in the table. The table suggests that there are four options A, B, C, and D, and the correct answer is C.

The correct answer is B because the buoyant force acting on an object submerged in a fluid is equal to the weight of the fluid displaced by the object. In this case, the buoyant force acting on the objects will be greater than their weight if they are placed in the position shown in B. This is because the density of the objects is less than the density of the oil, causing them to float. In positions A, C, and D, the objects will sink because the buoyant force will be less than their weight.

The given answer states that the behavioral effects of using marijuana include being sensitive, easily bored, and rebellious. These behaviors are commonly associated with the use of marijuana, as it can alter a person's mood and perception, leading to changes in behavior such as increased sensitivity, lack of focus, and a tendency to resist authority or rules.

The correct answer is "perisa ayam dan siklamat" because the question asks for the synthetic flavoring and sweetening ingredients in the food composition. "Perisa ayam" refers to the synthetic flavoring for chicken taste, while "siklamat" is a synthetic sweetener. Therefore, these two ingredients are the correct answer.

The graph shows the menstrual cycle of a woman. The statement "ovulasi berlangsung disekitar hari ke 14" (ovulation occurs around day 14) is correct because it aligns with the graph where there is a peak in hormone levels around day 14, indicating ovulation. The other statements do not match the graph or provide incorrect information.