Check out our guide to the best ways to convert Celsius to Fahrenheit or vice versa. Are you studying clouds in your science class? Get help identifying the different types of clouds with our expert guide. Writing a research paper for school but not sure what to write about? Our guide to research paper topics has over topics in ten categories so you can be sure to find the perfect topic for you.
She has taught English and biology in several countries. Our new student and parent forum, at ExpertHub. See how other students and parents are navigating high school, college, and the college admissions process. Ask questions; get answers. How to Get a Perfect , by a Perfect Scorer. Score on SAT Math. Score on SAT Reading. Score on SAT Writing. What ACT target score should you be aiming for? How to Get a Perfect 4. How to Write an Amazing College Essay. A Comprehensive Guide.
Choose Your Test. What Is the Density of Water? By Temperature and Unit. Calculating the Density of a Regular Object For regular objects those whose faces are standard polygons, such as squares, rectangles, triangles, etc.
Calculating the Density of a Liquid or Irregular Object If the object has an irregular shape and you can't easily calculate its volume, you can find its volume by placing it in a graduated cylinder filled with water and measuring the volume of water it displaces. Calculating the Density of a Liquid With a Hydrometer If you're trying to calculate the density of a liquid, you also can do so by using an instrument known as a hydrometer. Summary: What Is the Density of Water?
Water layers can sometimes be felt when swimming. The relative density of one water mass in relation to another determines whether a layer of water floats or sinks. Density can be determined by measuring the mass and volume of an object. In the Density Bags Activity , density was not calculated. Instead, relative density was determined by observing whether a bag of one liquid floated or sank in another liquid.
A bag of liquid that sank was determined to be more dense than the liquid in the beaker. A bag of liquid that floated was determined to be less dense than the liquid in the beaker.
The motion of any object is due to forces , which are pushes or pulls. Vertical—up-and-down—movement of water masses in the ocean can be explained in terms of two forces.
The gravitational force G of the earth pulls downward and is proportional to the mass of an object. The gravitational force on an object is also called weight. The force due to gravity is greater on objects that are more massive, or weigh more. The buoyant force B of water pushes up. In the third century B. He observed that the volume of water pushed out of a tub, or displaced, by an object was equal to the volume of the object.
The buoyant force of the water is equal to the weight of the water displaced. An object accelerates when the forces on that object are unequal. Although acceleration is commonly used to describe an object that is speeding up, the scientific definition of acceleration means changing speed.
An accelerating object can be speeding up or slowing down. An object will always move in the direction of the greater force. An object may accelerate downwards sink or upwards rise in a body of water. If all of the forces on an object are balanced, there is no acceleration. In this case, the object may not move—like a book sitting on a flat table—or the object may move at a constant speed—like a car traveling at a steady 80 kilometers per hour.
In the water, an object might remain still either at the surface or within the water column. Three cubes of the same size, but with different masses and thus different densities, are placed in three beakers of water Fig. Because the cubes are identical in volume, they displace the same amount of water. Buoyant force is represented in Fig.
These arrows are the same length for each of the cubes, indicating that the strength of the buoyant force acting on each cube is the same. Because the masses of the cubes are not equal, the gravitational force G acting on each cube is different. Gravitational force is represented in Fig. Anne Marie Helmenstine, Ph. Chemistry Expert. Helmenstine holds a Ph. She has taught science courses at the high school, college, and graduate levels.
Facebook Facebook Twitter Twitter. Featured Video. Cite this Article Format. Helmenstine, Anne Marie, Ph. Freezing Point Depression Example Problem. What Are Examples of Hydrogen Bonding? Snowflake Chemistry - Answers to Common Questions. Solidification Definition and Examples in Chemistry. Your Privacy Rights.
0コメント