What is the Doppler effect and why is it important?

What is the Doppler effect and why is it important? The Doppler effect is important in astronomy because it enables the velocity of light-emitting objects in space, such as stars or galaxies, to be worked out. What are two everyday applications of the Doppler effect? The Doppler effect has several real-world applications. For example, besides […]

What is a high pitch or low pitch?

What is a high pitch or low pitch? A high pitch sound corresponds to a high frequency sound wave and a low pitch sound corresponds to a low frequency sound wave. Amazingly, many people, especially those who have been musically trained, are capable of detecting a difference in frequency between two separate sounds that is […]

Is phenolphthalein pink in acid?

Is phenolphthalein pink in acid? Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions. What is a scale used to describe how acidic or basic a solution is? pH. This is the scale used to describe how acidic or basic […]

Is gravitational force equal to weight?

Is gravitational force equal to weight? The gravitational force on Earth is equal to the force the Earth exerts on you. At rest, on or near the surface of the Earth, the gravitational force equals your weight. What two factors does gravitational force depend on? When dealing with the force of gravity between two objects, […]

What is the relation between current and resistance?

What is the relation between current and resistance? The relationship between current, voltage and resistance is expressed by Ohm’s Law. This states that the current flowing in a circuit is directly proportional to the applied voltage and inversely proportional to the resistance of the circuit, provided the temperature remains constant. What is a specific resistance? […]

Can you cheat on Penn Foster?

Can you cheat on Penn Foster? Without limiting the foregoing, you are expressly prohibited from using Content to cheat on Penn Foster educational tests or assignments, to assist or facilitate cheating by others, or to compromise the integrity of Penn Foster educational programs and Penn Foster students’ educational experience in any way. Can you claim […]

How do you graph pictures after dilation?

How do you graph pictures after dilation? The scale factor, r, determines how much bigger or smaller the dilated image will be compared to the preimage. In order to graph a dilation, use the center of dilation and the scale factor. Find the distance between a point on the preimage and the center of dilation. […]

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