Instead of imaging how the particles will move and guess their motion, there is a technique which can help you to determine that. In...

Answer: Option C View the videos below to learn how to solve it. There are more than one method. Alternatively, you may put values to...

Answer: Option B

Answer: Option C

Answer: Option D

At sea-level, the barometer which Pie is holding reads 760 mm of Hg. When he is at the top of Mount Pie, the same barometer reads 230 mm...

Solutions: Option B You can view the video tutorial here or the written solutions below.

Solutions: Option B Whatever that goes in has to come out. With this basic concept, you will be able to solve this question easily....

Take note that the question is looking for specific latent heat of vaporisation during boiling. Hence information of mass m1 before...

Solutions: Option B As lamp X is thicker and shorter , these two factors make the resistance of X lower than Y . Recall: Length...

Answer: Option A Refer to the video tutorial below for explanation.

The concepts needed to solve such questions Length increases, resistance increases and vice versa. Finding resistors in parallel and in...

Based on individual calculations, the highest effective resistance will only be achieved if the junctions are connected at Q and S.

Solutions: Option B Key concepts: Both balls are free-falling, hence both will experience the same acceleration due to gravity 10 m/s2.

Answer: Option B Since water will naturally reach 40m high from the bottom of the apartment, you only need to pump the water up by a...

Answer: Option D Key concept here is Newton’s 3rd Law. Action equals reaction. Both trolleys are connected by the spring, hence the...

Solutions: Option B Without the current in the river, the time taken for the swimmer to reach Q is 50s. This is based on the vertical...

Solutions: Option B

Answer: Option A