Homework due Monday, 2/22/16

1)Explain the difference between a physical property and a chemical property.

2)List 5 examples of physical properties.

3)List 5 examples of chemical properties.

4)What is the difference between a fluid and a liquid?

5)Give an example of a fluid that is NOT a liquid.

6)What is the difference between pressure and force?

7)Draw an example of pressure and force difference and write out the pressure/force equation.

8)If I put a force of 10N onto an area of 2m2, what is the pressure?

9)If I have a pressure of 100N/m2 on an area of 2m2, what is the force I have applied?

Homework due Wednesday, 2/24/16

1)What does the Buoyant Force depend on: mass, volume, force of gravity, density?

2)As we start to lower an object into the water, the Buoyant Force starts to increase. Why is this? You may want to show a picture in your explanation.

3)An object that has a Force of Gravity greater than its Buoyant Force does what when you put it in the water?

4)What will happen to an object when the Force of Gravity is less than the Buoyant Force?

5)If two objects have the same volume but the second one is twice as dense, which one is more likely to float?

6)Regarding the answer to #5, is this because the density changes the Force of Gravity or the Buoyant Force?

7)Why do heavy ships made out of dense steel float?

8)In complete sentences, describe the two ways we can find the Buoyant Force, the first using a ruler and scale, and the second using water and a different type of scale.

Homework due Thursday, 2/25/16

1)A rectangular object is 5 cm long, 2 cm wide, and 3 cm high. Its mass is 120 grams.

  1. Calculate its volume.
  2. Calculate its density in g/cm3.
  3. Will the object sink or float in water? Show your work or explain in words how you know.

2)A cube (all dimensions are equal) has a side length of 4 cm and a mass of 30 grams,

  1. What is its volume?
  2. What is its density?
  3. Will it sink in mercury (density 13.5 g/cm3)?

3)Solid iron has a density of 7.9 g/cm3. Liquid mercury has a density of 13.5 g/cm3. Will iron float or sink in mercury?

4)Why is it incorrect to say that heavy boats sink in water?

5)A rock will sink in water but what about if you place it in a pool of mercury? If the rock’s density is 2.6 g/cm3, will it sink or not?

6)Draw pictures of two ways we can find the Buoyant Force (from the lab).