Soal Un Smp/Mts IPA 2011/2012 Paket A87

The correct answer is A-B = GLBB dipercepat, C-D = GLBB diperlambat. This means that the motion of the bicycle is initially accelerating (dipercepat) from point A to point B, and then decelerating (diperlambat) from point C to point D. This can be observed from the description given in the question, where the child is sliding forward on the road without pedaling. The initial acceleration could be due to the child pushing off from a stationary position, and the subsequent deceleration could be caused by friction or other external forces acting on the bicycle.

The correct answer is 1 dan 3. This is because in the table, the quantities listed in 1 (mass) and 3 (time) are fundamental quantities in the International System of Units (SI). The corresponding measurement instruments for mass are scales or balances, and for time, it is a clock or stopwatch.

The correct answer is 1 dan 2 because both (1) penguapan saat air dididihkan (evaporation when water is boiled) and (2) pemuaian saat besi dipanaskan (expansion when iron is heated) are examples of physical changes. In both cases, the substances undergo a change in their physical state or size without any chemical reactions taking place.

Dari diagram trafo yang diberikan, tidak dijelaskan berapa jumlah lilitan pada trafo sekunder tersebut. Oleh karena itu, penjelasan tidak tersedia.

The question asks for the type of material based on the measured mass and density. Since the specific material is not mentioned in the question, we can assume that the options provided are the different types of materials that could potentially match the measured mass and density. Therefore, the correct answer would be "Kuningan" as it is the only option provided that could have a matching mass and density.

Based on the given observations, it can be inferred that the chemical properties are represented by pair number 3 and 4. This is because rusting (observation 3) is a chemical reaction that occurs when a metal reacts with oxygen in the presence of moisture, and rotting (observation 4) is also a chemical process that involves the decomposition of organic matter. The other observations, such as conductivity (observation 1) and flexibility (observation 2), are physical properties rather than chemical properties.

HBr is the correct answer because it is a molecule that consists of two atoms, hydrogen (H) and bromine (Br), bonded together. H2, O2, and N2 are not molecules, but rather diatomic elements, meaning they exist as two atoms of the same element bonded together.

The correct answer is 2,0 A. In a series circuit, the total current flowing through the circuit is the same at all points. Therefore, the total current in the circuit is 2,0 A.

The question states that 0.2 kg of air is heated with 42,000 joules of heat. The specific heat capacity of water is given as 4,200 J/kg 0C. To find the final temperature of the water, we can use 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. Rearranging the formula to solve for ΔT, we have ΔT = Q / (mc). Plugging in the values, we get ΔT = 42,000 / (0.2 * 4,200) = 75 0C. Therefore, the final temperature of the water is 75 *C.

Sound is a mechanical wave that requires a medium to travel through. In this scenario, the sound produced by the electric bell was able to travel through the air inside the glass cylinder. However, as the air was gradually pumped out of the cylinder, the medium for sound transmission was removed. Without a medium, such as air, sound cannot propagate and therefore becomes inaudible.

The correct answer is 1 and 2. This is because statement 1 mentions that ultraviolet rays are entering the Earth more, which is a consequence of the thinning ozone layer. Statement 2 states that there is a decrease in plant productivity, which can be attributed to the increased exposure to harmful ultraviolet rays. Therefore, both statements are related to the impacts of the depletion of the ozone layer.

To achieve balance on the see-saw, the heavier child (Anak A) needs to move closer to the fulcrum (titik P). This will create a counterbalance with the lighter child (Anak B) on the other side, allowing the see-saw to be balanced. Moving the fulcrum or the lighter child to different positions will not result in balance.

After the plastic ruler is rubbed with wool, the transfer of electrons occurs from the wool to the plastic ruler, resulting in the plastic ruler acquiring a negative charge.

The correct answer is "Lebih besar dari pada koefisien muai mulut botol kaca" because when the metal bottle cap is tightly closed, it expands due to the increase in temperature when hot water is poured over it. The coefficient of expansion for the metal cap is greater than that of the glass bottle mouth, causing the cap to expand more and become easier to open.

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The kinetic energy of an object is calculated using the formula KE = (1/2)mv^2, where m is the mass of the object and v is its velocity. In this case, the mass of the bullet is given as 10 grams and its velocity is given as 100 m/s. By plugging these values into the formula, we can calculate the kinetic energy. KE = (1/2)(10g)(100 m/s)^2 = (1/2)(0.01 kg)(10000 m^2/s^2) = 500 joule. Therefore, the correct answer is 500 joule, not 50 joule.

Dari gambar, terlihat bahwa bandul bergerak dari titik A ke titik C dalam waktu 0,2 detik. Frekuensi adalah jumlah siklus yang terjadi dalam satu detik. Oleh karena itu, frekuensi ayunan bandul dapat dihitung dengan membagi jumlah siklus dalam waktu 1 detik. Dalam kasus ini, bandul menyelesaikan satu siklus dalam waktu 0,2 detik, sehingga frekuensinya adalah 1/0,2 = 5 siklus/detik atau 5 Hz.

Amplitudo adalah jarak maksimal yang ditempuh oleh bandul dari posisi keseimbangan. Dalam gambar, terlihat bahwa bandul berayun dari posisi keseimbangan (titik B) hingga mencapai titik terjauh (titik A atau C) dengan jarak sekitar 5 cm. Oleh karena itu, amplitudo ayunan bandul adalah 5 cm.

Based on the information given, the power of the electrical device is not provided. Without the power value, it is not possible to calculate the energy used. Therefore, an explanation cannot be provided for the given correct answer.

When an object is placed in front of a concave mirror, the image formed is virtual, upright, and magnified. The distance between the object and the mirror is 6 cm. When the object is moved 1 cm away from the mirror, the image distance will increase. Using the mirror formula (1/f = 1/v - 1/u), where f is the focal length, v is the image distance, and u is the object distance, we can calculate the new image distance. Assuming the focal length is positive for a concave mirror, we can substitute the given values into the formula and solve for v. The calculated value is 9.3 cm, which matches the given answer.

The explanation for the given correct answer is that the process of making magnet PQ results in the properties and pole arrangement remaining the same. This means that the pole arrangement of P being the south pole and Q being the north pole remains unchanged throughout the process.