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Reviewer Science P.E
Energy, Power, Sound
| Question | Answer |
|---|---|
| What is Energy? | Energy is the ability to do work. |
| It is considered a quantitative property that can be transferred from an object to perform work. | Energy. |
| The International System of Units of measurement of Energy is ____. | Joule. |
| The unit of energy is named after ___. | James Prescott Joule. |
| Is a derived unit equal to the energy expended in applying a force of one newton through a distance of one meter. | Joule. |
| Units of Energy | Ergs Calories British Thermal Units Kilowatt-Hours Kilocalories |
| Different Types of Energy | 1.) Kinetic Energy 2.) Potential Energy |
| Is the energy associated with the object's motion. | Kinetic Energy |
| Kinetic Energy is the ___ associated with the constant random bouncing of atoms or molecules. | Energy |
| This is also known as thermal energy. | Kinetic Energy |
| Kinetic Energy depends on the ___ of the object squared. | Velocity |
| ____ must always have zero or positive values. | Kinetic Energy |
| Kinetic Energy is a ___, and it is expressed in Joules. | Kinetic Energy is a scalar quantity, and it is expressed in Joules. |
| What is Potential Energy? | Potential Energy is the energy stored in an object or system of objects. |
| Can transform into a more obvious form of kinetic energy. | Potential Energy |
| Both ___ and ___ form mechanical energy | Both potential energy and kinetic energy form mechanical energy. |
| What is Power? | The physical quality that describes how fast or how slowly work is being performed is called power. |
| Is related to speed. | Power |
| This unit was adapted by ____ to compare the power output steam engines with the power of draft horses. | James Watt |
| What is sound? | A Sound is a vibration that propagates through a medium in the form pf a mechanical wave. |
| Travels fastest in solids, relatively slower in liquids and slowest in gases. | Sound |
| The sound is defined as? | A vibration that propagates as an audible wave of pressure, through a medium such as gas, liquid or solid. |
| What is a Soundwave? | A Soundwave is the pattern of disturbance caused by the energy traveling away from the source of the sound. |
| ____ are longitudinal waves. | Sound waves |
| Nature Of Sound | The sound produced by a guitar is different from the sound produced by a drum. |
| Sound can be characterized by its ____, ____, and ____. | frequency, wavelength, and amplitude. |
| The number of rarefactions and compressions that occur per unit time is known as the ____. | Frequency of a sound wave (Frequency of sound) |
| The distance between the successive compression and rarefaction is known as the ____. | Wavelength of a sound wave (Wavelength of Sound) |
| The ____ is the magnitude of the maximum disturbance in a sound wave. | Amplitude of sound |
| The amplitude is also a measure of ____. | Energy |
| The speed at which sound waves propagate through a medium is known as the ____. | Speed of Sound |
| The ___ of sound is different in different media. | Speed |
| Is highest in solids because the atoms in solid are highly compressed. | Speed of Sound |
| Is similar to the reflection of light. | Reflection of Sound |
| The reflection of sound obeys the following laws of reflection | (a) The angle of incidence is equal to the angle pf reflection. (b) The incident sound, the normal sound and the normal sound all lie in the same plane. |
| When a ____ hits a hard surface, it reflects back to its source. | Sound |
| This reflection of sound is otherwise is called an ___. | Echo |
| What sound is otherwise called an echo? | Reflection of Sound |
Created by:
sleepyheadyuji
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