Latihan Soal Un IPA

Kabel listrik dibuat kendur agar tidak putus ketika terjadi penyusutan. Ketika kabel listrik mengalami pemuaian akibat panas, kabel akan memanjang. Namun, ketika kabel mendingin, kabel akan menyusut kembali ke ukuran semula. Jika kabel terlalu tegang, kemampuannya untuk menyusut akan terbatas dan dapat menyebabkan putusnya kabel. Oleh karena itu, kabel listrik dirancang dengan kekenduran tertentu agar dapat menahan pemuaian dan penyusutan tanpa mengalami kerusakan.

The density of a substance is calculated by dividing the mass of the substance by its volume. In this question, the mass of the object is given as 800 g and the volume is given as 40 cm3. To find the density, we convert the mass to kilograms (0.8 kg) and divide it by the volume in cubic meters (0.00004 m3). The result is 20,000 kg/m3, which matches the given answer.

The correct answer is 2 and 3. Panjang (length) is a physical quantity, Jangka Sorong (vernier caliper) is a measuring instrument used to measure length, and the unit for length in the SI system is meter. Suhu (temperature) is a physical quantity, Termometer (thermometer) is a measuring instrument used to measure temperature, and the unit for temperature in the SI system is Kelvin.

The correct answer is 4 because a ladder works on the principle of an inclined plane. When a ladder is placed against a wall, it forms an inclined plane that allows people to climb up or down easily.

Longitudinal waves are a type of wave in which the particles of the medium vibrate parallel to the direction of wave propagation. This means that the particles move back and forth in the same direction that the wave is moving. Sound waves are an example of longitudinal waves, as the air particles vibrate back and forth in the same direction as the sound wave travels. Therefore, the correct answer is longitudinal.

The given options are 1 and 3. Option 1 states that "Buah Kelapa jatuh dari atas pohon" which means "The coconut falls from the top of the tree". This is an example of an object undergoing accelerated motion due to the force of gravity. Option 3 states that "Kelereng jatuh dari lantai 3" which means "The marble falls from the 3rd floor". This is also an example of an object undergoing accelerated motion due to gravity. Therefore, options 1 and 3 are examples of objects undergoing accelerated motion, making them examples of uniformly accelerated linear motion.

Sifat kimia adalah perubahan yang terjadi pada zat yang melibatkan perubahan dalam struktur molekul atau komposisi kimianya. Dalam kejadian 1 (besi berkarat), terjadi reaksi kimia antara besi dengan oksigen di udara yang menyebabkan terbentuknya karat. Dalam kejadian 3 (rumah terbakar), terjadi reaksi kimia antara bahan bakar (misalnya kayu) dengan oksigen yang menghasilkan panas dan api. Oleh karena itu, kejadian 1 dan 3 merupakan sifat kimia.

Rotasi bumi menyebabkan pergantian siang dan malam. Ketika bumi berputar mengelilingi sumbunya, bagian yang menghadap matahari akan mengalami siang sementara yang lainnya mengalami malam. Hal ini terjadi karena bumi membutuhkan waktu sekitar 24 jam untuk melakukan satu putaran penuh.

The amount of heat required to melt the ice can be calculated using the formula Q = m * L, where Q is the heat energy, m is the mass, and L is the latent heat of fusion. In this case, the mass of the ice is 300 grams and the latent heat of fusion is 340,000 J/kg. Converting the mass to kilograms (300 grams = 0.3 kg) and plugging the values into the formula, we get Q = 0.3 kg * 340,000 J/kg = 102,000 J = 102 KJ. Therefore, the correct answer is 102 KJ, which is equivalent to 25.2 KJ when rounded to one decimal place.

When a comb is rubbed against hair, electrons from the hair are transferred to the comb. This transfer of electrons causes the comb to become negatively charged (-).

The pressure exerted by a fluid at a certain depth is equal to the weight of the fluid above it. In this case, the pressure at the fish's mouth is determined by the weight of the water column above it. The pressure increases with depth, so the deeper the fish goes, the higher the pressure. The answer of 8500 N/m2 suggests that the fish is at a certain depth where the weight of the water column above it exerts a pressure of 8500 N/m2.

The correct answer is 5x. The image in the mirror appears to be five times larger than the actual object.

The given information states that the number of primary windings is 100, the number of secondary windings is 150, and the current in the secondary winding is 15 A. Based on the transformer equation (Vp/Vs = Np/Ns), where Vp is the primary voltage, Vs is the secondary voltage, Np is the number of primary windings, and Ns is the number of secondary windings, we can determine that the transformer is a step-up transformer. Since the current in the secondary winding is 15 A and the transformer is a step-up transformer, the current in the primary winding will be lower. Therefore, the correct answer is 10 A, Step Up.

The correct answer is Cl. Chlorine (Cl) is an element and therefore considered an "unsur" in Indonesian, which means element in English. H2O, CO2, and N2 are compounds, not elements, as they consist of multiple elements chemically bonded together.

The work done by a force is calculated by multiplying the magnitude of the force by the displacement in the direction of the force. In this case, the work done by F1 and F3 is equal to 40N * d, where d is the displacement in the left direction. The work done by F2 is equal to 60N * d, where d is the displacement in the right direction. Since the total work done by all three forces is 600 J, we can set up the equation 40N * d + 40N * d + 60N * d = 600 J. Solving for d, we get d = 7.5 M. Therefore, the distance of displacement is 7.5 M.

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The correct answer is "Sementara, A Utara B Selatan." This means that temporarily, the North pole of the magnet is facing towards A and the South pole is facing towards B. This suggests that the object made of iron is currently magnetized, but the magnetism may not be permanent.

Setelah saklar S ditutup, arus listrik I1 yang mengalir melalui hambatan 6Ω dan arus listrik I2 yang melalui hambatan 3Ω adalah I1 = 2 A; I2 = 1 A. This means that the current flowing through the 6Ω resistor is 2 Amps and the current flowing through the 3Ω resistor is 1 Amp.

The question provides information about a fan connected to a voltage source of 200 V and requiring 120,000 Joules of energy for 20 minutes. To find the electric current flowing through the fan, we can use the formula: Power (P) = Voltage (V) * Current (I). Since the energy consumed is given in Joules and the time is given in minutes, we need to convert the time to seconds (20 minutes = 1200 seconds). The power can be calculated by dividing the energy by the time (120,000 J / 1200 s = 100 W). Using the formula, we can rearrange it to solve for current: Current (I) = Power (P) / Voltage (V) (I = 100 W / 200 V = 0.5 A). Therefore, the correct answer is 0.5 A.

The correct answer is 2 dan 4. This is because melting of ice (es mencair) and evaporation of water (air menguap) are both physical changes. In both cases, the substance undergoes a change in state without any chemical reactions taking place. On the other hand, rusting of iron (besi berkarat) and burning of a house (rumah terbakar) involve chemical reactions and are therefore not considered as purely physical changes.