# physics

in air an object weighs 15N when immersed in water it weighs 12N when immersed in another liquid weighs 13N. Determine the density of the object and that of the other liqui

1. 👍
2. 👎
3. 👁
1. a. M1*g = 15.
M1 = 15/g = 15/9.8 = 1.53 kg = mass of object in air.
M2 = 12/9.8 = 1.22 kg = mass of object immersed.
M1-M2 = 1.53-1.22 = 0.31 kg lost by object = mass of water displaced.

Dw = 1g/cm^3. = density of water.
Vw * Dw = 310.
Vw*1 = 310
Vw = 310 cm^3 = vol. of water displaced = vol. of object.
Vo*Do = 1530 g.
310*Do = 1530
Do = 4.94 g/cm^3 = density of object.

b. M = 13/g = 13/9.8 = 1.33 kg. = mass of object immersed.
1.53-1.33 = 0.20 kg lost by object = mass of liquid displaced.
V*D = 200 g.
310D = 200
D = 0.645 g/cm^3. = density of liquid.

1. 👍
2. 👎

## Similar Questions

1. ### Physics

An object weighs 15N in air and 13N when submerged in water. What is the density of the object.

2. ### physics

An object weighing 325 N in air is immersed in water after being tied to a string connected to a balance. The scale now reads 250 N. Immersed in oil, the object weighs 275 N. (a) Find the density of the object. (b) Find the

3. ### pharmaceutical calculations

1. A chemical crystal weighs 3.630 grams in air and 1.820 grams when immersed in an oil. If the specific gravity of the oil is 0.837, what is the specific gravity of the chemical? 2. A piece of wax weighs 42.65 grams in air, and a

4. ### Science- physics

An iron anchor weighs 250 pounds in air and has a weight density of 480 lbs/ft3. If it is immersed in sea water that has a weight density of 64 lbs/ft3, how much force would be required to lift it while immersed? I know the answer

1. ### physics

A solid aluminum ingot weighs 89 N in air. What is its volume? The ingot is suspended from a rope and totally immersed in water. What is the tension in the rope?

2. ### physics

A rock is suspended by a light string. When the rock is in air, the tension in the string is 38.2 N. When the rock is totally immersed in water, the tension is 28.9 N. When the rock is totally immersed in an unknown liquid, the

3. ### Physics- formula help

How do you calculate air resistance on an object if you have how much the object weighs and the acceleration?

4. ### Physics

A solid of density 5000 kg/m^3 weighs 0.5 kgf in air.It is completely immersed in water of density 1000 kg/m^3. Calculate the apparent weight of the solid in water.

1. ### physics

an object displaces 2.3×〖10〗^(-3) m^3 of water when totally immersed into it. What is the buoyant force exerted by water? What is the density of the object if its mass is 26kg?of what material is the object made of?

2. ### C++

Write a program that asks the user to enter an object's mass, and then calculates and displays its weight. If the object weighs more than 1,000 Newtons, display a message indicating that it is too heavy. If the object weighs less

3. ### Physics

A metal block of density 900kg/m3 weighs 60N in air . Find its weight when immersed in paraffin wax of density 800kg/m3

4. ### science

calculate the density of a solid which weighs 15N in air and 12N in water