Two resistances of 5.0 Ω and 7.0 Ω are connected in series and the combination is connected in parallel with a resistance of 36.0 Ω. The equivalent resistance of the combination of three resistors is 

Shown in the figure are two hollow cubes C₁ and C₂ of negligible mass partially filled (depicted by darkened area) with liquids of densities ρ₁ and ρ₂, respectively, floating in water (density ρ_w). The relationship between ρ₁, ρ₂ and ρ_w is 

An astronaut whose weight on the Earth is 600 N experiences weightless- ness on International Space Station orbiting around the Earth. It means that

Which of the following statements give characteristics of contact forces?

1. It appears between an object when it is in contact with some other object

2. It satisfies the third law of motion

3. It may appear between a pair of solid and fluid

Select the answer using the code given below: