Posted by Phillip on Tuesday, December 16, 2008 at 12:15am.
find volume of metal first
Buoyant force in water = 14 N = weight of water displaced in 1 g gravitational field
mass of water displaced = 14 N/9.8 m/s^2 = 1.43 kg of water displaced
the density of water = 1,000 kg/m^3
so
volume of metal = 1.43*10^-3 m^3
Buoyant force in unknown = 50 - 41 = 9 N
so mass of unknown displace = 9/9.8 = .918 kg
so the density of unknown = .918kg/1.43*10^-3 = 642 kg/m^3
or 64.2% of the water density
I'm confused about the "1 g gravitational field". What's the 1 g referring to and why is it 1 g?
g is the acceleration of gravity which is about 9.8 m/s^2 on the surface of earth.
Since the weights were given in Newtons, a unit of force, not mass, I used weight in Newtons = mass in kilograms * acceleration in meters / second squared to find the mass in kilograms.
where did you got the buoyant force in water?
Related Questions
8th science - An object that weighs 3N displaces 280 mL of water which weighs 2....
Chemistry - An unknown metal, heated to an unknown temperature until a liquid is...
physics - A block of wood weighs 40 N in air and 30 N in water. What is the ...
physics - A block of wood weighs 40 N in air and 30 N in water. What is the ...
8th grade science - an object that weighs 3N displaces 90mL of water which ...
physics - A piece of metal with a mass of 1.9 kg, specific heat of 200...
college Chemistry - 1. If 25 grams of Iron (III) hydroxide is dissolved in a ...
Chemistry - A 108g piece of unknown metal is heated to 100 degrees C in boiling ...
Physics - Explain why objects experience a buoyant force when immersed in a ...
Physics - An object weighing 400.0g in air is immersed in water after being tied...
For Further Reading
