School Olympiads - National Science Olympiad (NSO)

Analytical Physical & Biological Sciences question bank (Advanced Physics, Chemistry & Biology)

Practice 39 free School Olympiads - National Science Olympiad (NSO) Advanced Physics, Chemistry & Biology - Analytical Physical & Biological Sciences questions with answers and step-by-step solutions.

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Q1.

Physics (Buoyancy & Archimedes): A solid metallic cube of edge 10 cm and density $2700\text{ kg/m}^3$ is completely submerged in water (density $1000\text{ kg/m}^3$) in 'NSO Physics: Mechanics, Optics, Electricity, Magnetism and Gravitation Challenges'. What is the buoyant force acting on it? ($g = 9.8\text{ m/s}^2$)

(A)

$9.8\text{ N}$ ($F_b = \rho_w V g = 1000 \times 10^{-3} \times 9.8 = 9.8\text{ N}$) (NSO Physics: Mechanics, Optics, Electricity, Magnetism and Gravitation Challenges)

(B)

$26.46\text{{ N}}$

(C)

$19.6\text{{ N}}$

(D)

$98\text{{ N}}$

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Q2.

Biology (Genetics): In a Mendelian dihybrid cross between heterozygous pea plants ($RrYy \times RrYy$) in 'NSO Physics: Mechanics, Optics, Electricity, Magnetism and Gravitation Challenges', what is the expected phenotypic ratio of offspring?

(A)

$9 : 3 : 3 : 1$ (NSO Physics: Mechanics, Optics, Electricity, Magnetism and Gravitation Challenges)

(B)

$3 : 1$ (Monohybrid ratio)

(C)

$1 : 2 : 1$

(D)

$1 : 1 : 1 : 1$

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