Soal IPA Uji Coba Online 2020

Based on the given graph, point B to C represents a change in state without a change in temperature. This means that the ice is melting into water without any increase in temperature. Therefore, statement 2 is correct.

The correct answer is 2. The explanation for this is that the hand above the fire feels hotter because there is convection heat transfer occurring. Convection is the transfer of heat through the movement of a fluid, in this case, the air. The hot air rises and carries the heat away from the fire, making the hand above feel hotter. On the other hand, the hand beside the fire only experiences conduction heat transfer, which is the direct transfer of heat through physical contact, resulting in a lower temperature sensation.

To balance the scale, an additional weight of 500 grams is needed on the right side.

The correct answer is number 2 because it states that for the condition of Hypermetropia, convex lenses are suitable. Hypermetropia is a condition where the person has difficulty seeing nearby objects clearly. Convex lenses are used to correct this condition by helping to focus the light properly on the retina, thus improving near vision.

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To maintain balance, the torque on one side of the lever must be equal to the torque on the other side. Torque is calculated by multiplying the force applied by the distance from the pivot point. In this case, if the lever is shifted 40 cm away from the pivot point, the force needed to maintain balance can be calculated by setting up the equation: (force) x (40 cm) = (force) x (0 cm). Since the distance on one side is 0 cm, the force on the other side must be 80 N in order to maintain balance. Therefore, the correct answer is C. 80 N.

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The correct answer is 112,50 because the question states that if the Celsius thermometer shows 75o, then the X thermometer will show a certain value. Since there is no information given about the conversion or relationship between Celsius and X thermometers, it is not possible to determine the exact value. Therefore, it can be assumed that the answer 112,50 is correct based on the given options.

Apabila benda digeser 6 cm menjauhi cermin, maka sifat bayangan yang terbentuk adalah maya (tidak nyata), tegak, dan diperkecil.

The correct answer is C. 2 dan 3. This is because in the given diagram, points A and C represent the highest points in the trajectory of the ball, which means they have the highest gravitational potential energy. On the other hand, point B represents the lowest point in the trajectory, so it has the highest kinetic energy. Therefore, statement 2 (energi potensial di B paling besar) and statement 3 (energi kinetik di A paling besar) are both correct.

Based on the given graph, object (3) is shown to be at rest or in a stationary position.

The correct answer is option 1, which states that the amplitude of the spring's vibration is 5 cm and the period is 3 seconds. This means that the spring oscillates back and forth between points A and B, with a maximum displacement of 5 cm from the equilibrium position. The period of the vibration, which is the time it takes for one complete cycle of oscillation, is 3 seconds.

When the charges are separated by a distance of 0.5 meters, the Coulomb force between them is F Newton. According to Coulomb's law, the force between two charges is inversely proportional to the square of the distance between them. So, when the distance is increased to 1.5 meters, the force will decrease by a factor of (0.5/1.5)^2 = 1/9. Therefore, the new Coulomb force is 1/9 F.

The speed of sound in air is given as 300 m/s. The sound wave travels from the source to the wall and then back to the source, resulting in a total distance traveled of twice the distance between the source and the wall. Since the sound wave takes 2.5 seconds to travel this distance, we can use the formula speed = distance/time to calculate the distance. Rearranging the formula, we have distance = speed * time. Plugging in the values, we get distance = 300 m/s * 2.5 s = 750 m. However, this is the total distance traveled, so we divide it by 2 to get the distance between the source and the wall, which is 375 m. Therefore, the correct answer is C. 375,0 m.