A cubical copper block has each side 2.0 cm. It is suspended by a string and submerged in oil of density 820 kg / m 3. The tension in the string is (density of copper 8920 kg / m 3, g=10 m / s 2 )

Question

A cubical copper block has each side 2.0 cm. It is suspended by a string and submerged in oil of density 820 kg / m 3. The tension in the string is (density of copper 8920 kg / m 3, g=10 m / s 2 ) (A) 0.648 N (B) 0.712 N (C) 0.066 N (D) 1.37 N

Tardigrade Admin · Accepted Answer

Tension, T=m g- buoyant force =V ρ g-V σ g=V(ρ-σ) g=l3(ρ-σ) g =8 × 10-6(8920-820) × 10 =0.648 N

Q. A cubical copper block has each side $2.0 c m$ . It is suspended by a string and submerged in oil of density $820 k g / m^{3}$ . The tension in the string is (density of copper $8920 k g / m^{3}, g = 10 m / s^{2}$ )

0.648 N

0.712 N

0.066 N

1.37 N

Tension, $T = m g -$ buoyant force
$= V ρ g - Vσ g = V (ρ - σ) g = l^{3} (ρ - σ) g$
$= 8 \times 1 0^{- 6} (8920 - 820) \times 10$
$= 0.648 N$

Q. A cubical copper block has each side 2.0cm. It is suspended by a string and submerged in oil of density 820kg/m3. The tension in the string is (density of copper 8920kg/m3,g=10m/s2 )