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Grade 9General Physics

a gold orenament weight 36g in air and 34 g in water. it is suspected to have copper mixed in it. find the mass of Cu in ornament? D of Cu= 8.9g/cm3, D of gold = 19.3 g/cm3

a cubical wooden block of side 20 cm floats partially immerged in water. what mass of lead should be placed over the block so that the block is just immersed. D of Wood = 0.8 g/cm3, D of lead = 14g /cm3, D of water = 1 g /cm3

Girdhar Gopal

10 Years agoGrade 9

1 Answer

Saurabh Koranglekar

6 Years ago

In viewing through a magnifying glass, one usually positions one's eyes very close to the lens. Does angular magnification change if the eye is moved back?

general physics

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moment of inertia of a equilateral triangle about an axis passing through centre and perppendicular to the plane

general physics

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. Because of the rotation of the earth, a plumb bob may not hang exactly along the direction of
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general physics

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The length of a massless rod is measured using vernier callipers having 10 vernier scale divisions and least count of 0.1 mm. Two masses 1.00 ± 0.01 kg and 4.00 ± 0.02 kg are attached to its ends. If reading of vernier scale is 5 divisions coinciding with 1.3 cm, what is the % error in locating centre of mass from lighter mass

general physics

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A block is kept on x-y plane at a point (2m,3m). It is pushed with a force of magnitude 10 Ntowards point (5m,7m). The force can be represented as?

general physics

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Last Activity: 3 Years ago

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