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Q: What object is defined using a directrix and a focus?
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Related questions

What object using a directrix and a focus?

parabola


Using the given equations of parabolas find the focus the directrix and the equation of the axis of symmetry of x2 -8y?

10


Which measure in the metric system is defined by using an object for a referent?

The kilogram is the measure in the metric system that is defined using an object for a referent. It was previously defined by a physical object known as the International Prototype of the Kilogram, but is now defined in terms of a fundamental constant of nature called Planck's constant.


When using a film camera what must you do to bring an object focus?

cows


What should be in place when the first attempt is made to focus on an object on a slide?

Before attempting to focus on an object on a slide, ensure the slide is centered, the objective lens with the lowest magnification is in place, and the stage is at its lowest position. Start by using coarse focus adjustment to bring the object into view, and then switch to fine focus to sharpen the image.


What to do first when using a microscope?

What you do first when you use a microscope you put the slide in. Then you focus the microscope. Then you look at the object you are supposed to or look at the object you want to.


How can you describe an objects position?

An object's position can be described in terms of its distance and direction from a reference point. It can also be described using coordinates in a given coordinate system. Additionally, relative positions can be described using terms like above, below, in front of, or behind another object.


What can the measurement of hotness or coldness of an object be defined by?

The measurement of hotness or coldness of an object can be defined by its temperature, which is a measure of the average kinetic energy of the particles within the object. The higher the temperature, the hotter the object, and the lower the temperature, the colder the object. Temperature is typically measured using a scale such as Celsius or Fahrenheit.


What do you do to get sharper images for photos?

Lack of desired sharpness in photos may be caused by the object being out of focus or movement of either the object or the camera. Using manual focus, a good lens and a tripod are a few ways to get sharper images.


What is the basic requirement for you to see an object using the microscope?

The object must be small enough to fit on the slide and within the focus range of the microscope.


What is an objects location?

An object has to be somewhere, so if it not here it must be there. The place where it is could be defined using a spatial reference frame.


What is coarse used for?

Coarse focus on a microscope is used only when you are using the lowest objective lens. You use it to get the object magnified mostly. The fine focus is then used to adjust the resolution to the viewer's eyesight.