Answer: Option C View the video for explanation

Answer: Option A View the video for explanation

Answer: Option D View the video for explanation

Answer: Option A Many have the misconception that as the astronaut and camera are floating and weightless, there is no gravitational force acting on them. Actually both are inside the gravitational field of the Earth, and there is gravitational field strength, hence there is gravitational force acting on them towards the Earth. But as together with the station, they are all ‘free falling’, hence no normal contact force on the astronaut and camera, hence give the feeling of we

Answer: Option A

Liquid pressure P = pgh P is pressure in pascal (Pa) p is the density of the liquid (kg/m3) g is gravitational field strength (10 N/kg) h...

C is the heat capacity of a body. It is the amount of internal energy transferred to a body per unit change in temperature. (Or for 1...

Answer: Option D Note that the reading shown on the detector (536 counts per second) includes the sum of count rate from the...

Answer: Option B We usually encounter decay graph of the unstable radiaoactive substance. But this graph is the mass-time graph of the...

Answer: Option D We always use FLHR to find the force on the wire. But magnetic forces is a action-reaction pair. So when the force...

Answer: Option C This is a heating curve. So the specific latent heat of fusion here refers to the melting process, which occurs from...

Answer: Option A The direction of the magnetic field is downwards in the diagram. You can think of a North Pole of a magnet that is at...

Answer: Option D Refer to the video for the explanation

Answer: Option A For such questions, always locate accurately the position of the image of the O. Then draw the ray from the image to the...

Answer: Option D The most common mistake is to equate total energy at X equals to total energy at Y. At Y, there is no way to know the...

Answer: Option B To solve this question, you need to apply your FLHR. From the image, you will be able to know the orientation of the...

Answer: Option A Once the water wave is produced, frequency of the wave remains constant even when it travels from deep to shallow or...

Answer: Option B Refer to the video explanation

Answer: Option D For total internal reflection TIR to occur, two conditions must be present: 1. light must be travelling from a optically...

Answer: Option B Using conservation of energy (COE), the total energy of the car at X = total energy at Y. At X, the car only has...