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exam help! Hydrostatics 1. Homework Statement A girl of mass 40 kg and volume of 40 liter wants to keep her head of volume 3 liter above water surface as she can't swim . how much air in Kg should she fill in her jacket?? 2. Homework Equations 3. The Attempt at a Solution mass...

i mean to say "what is the condition for a body to move in a straight line" explanation based on circular motion

Homework Statement what is/are for a body to move in a straight line? Homework Equations The Attempt at a Solution

hi neu it is a solid steel

the circle drawn with a pencil will increase coz there is no free space for circle, but for a hole there will be free space

Homework Statement this is a 2 marks question a hole is drilled through a piece of steel what happens to the diameter of the hole as the steel is heated Homework Equations The Attempt at a Solution i guess the diameter of the hole decreases as both the outer as well as inner...

Homework Statement a beaker of boiling water can be picked up with bare fingers without burning if it is grasped only at the thin turned-out rim at the top , why? Homework Equations The Attempt at a Solution

Homework Statement this is a 2 marks question a hole is drilled through a piece of steel what happens to the diameter of the hole as the steel is heated Homework Equations The Attempt at a Solution i guess the diameter of the hole decreases as both the outer as well as...