Transcript Slide 1
3-1 • If a fluid flows from a fire hydrant to a fire. Where is the high pressure located? How do you know? 5 pts 3-1 • Where is atmospheric pressure least? – At the ocean – where an airplane cruises – In a mountainside city – at the outer edge of the atmosphere 5 pts 3-2 The buoyant force acting on the duck is _________________. The weight of the displaced water is ____________. 35N 30 N 10 pts 3-2 • An object does this when its weight is the same as its buoyant force. 10 pts 3-1 • Define water pressure 5 pts 3-1 • A camera sitting on your desk has an area of .73 m2 and weighs 5.5N. What is the pressure exerted by the camera on your desk? 15 pts 3-2 Will an object with a density of 1.1 g/mL float or sink in fresh water? Why? 5 pts 3-1 • What is the SI unit for pressure called? 5 pts 3-1 • Fish consume oxygen gas in the water and expel carbon dioxide out their mouth. This carbon dioxide comes out in the form of a bubble. Explain why the bubble is round. 15 pts 3-2 Aluminum has a density of 2.7 g/cm3. If a block of aluminum is cut in half, what will be the density of each piece of aluminum? Why? 15 pts 3-1 • Which of the following statements best describes why rain drops fall to the ground from a cloud? – A fluid can flow and take the shape of its’ container. – Air is about 1,000 times less dense than water. – Fluids flow from low to high pressure 10 pts 3-2 • The amount of matter in a given volume, or mass per unit volume. 5 pts 3-2 After a ship wreck, buried treasure sank to the bottom of the ocean. Explain why it sank according to buoyant force. 10 pts 3-1 • Fluids have characteristic properties that allow you to identify them. List three properties of fluids. 5 pts 3-2 You are asked to find the identity of an unknown substance. You are given the objects weight, mass, density and volume. Which piece of information would best be used to help you identify the substance? 10 pts 3-1 • Scientifically, explain why things are sucked into a tornado. 10 pts 3-2 • Which of the following would affect the level at which a row boat floats in a body of water? Give all correct answers: – depth of the water – number of people in the canoe – shape of the canoe – density of the canoe’s material 10 pts 3-2 • You are given a solid ball of clay. You are instructed to make the clay float. You must use all of the clay. What do you do? 5 pts 3-2 • This explains why a rock that displaces 5N of water has a buoyant force of 5N. – Pascal’s Principle – Bernoulli’s Principle – Newton’s Principle – Archimedes’ Principle 10 pts 3-2 • What substance is less dense than air? How do you know? 5 pts 3-2 Emily and her partner are performing a science lab. They are given the density of 6 different objects. How do you know which objects will sink or float in water? 10 pts 3-2 • An object with a weight of 75 N and a buoyant force of 75N will ______________. 5 pts 3-1 • Explain why your ears pop when you go up in an air plane. Be specific. 10 pts 3-2 • An object that has a greater weight than its’ buoyant force will__________________. 5 pts 3-1 • Define a fluid 5 pts 3-1 What type(s) of pressure are acting on the characters in the scene below? 10 pts 3-1 • The amount of force on a given area. 5 pts 3-1 • The upward force that fluids exert on all matter. 5 pts 3-2 • What is the density of water? 5 pts 3-1 • Explain how water pressure changes as depth changes. 5 pts 3-2 Calculate the density of an object that has a mass of 73g and a volume of 24 cm3. 15 pts 3-2 • A carton of ice cream weighs 18N. It displaces a volume of water that weighs 13N. What is the buoyant force on the object? 15 pts 3-1 Explain the exchange in pressure that occurs when you breathe. 15 pts