Question

define voltmater
define radiation
define polythene
define sound wave define
what is atomic number ​

Answer 1

Definition of Voltmeter:-

• Voltmeter, instrument that measures voltages of either direct or alternating electric current on a scale usually graduated in volts, millivolts (0.001 volt), or kilovolts (1,000 volts). ... The potentiometer operates by comparing the voltage to be measured with known voltage; it is used to measure very low voltages.

Definition of Radiation:-

• Radiation is energy that comes from a source and travels through space at the speed of light. This energy has an electric field and a magnetic field associated with it, and has wave-like properties. You could also call radiation “electromagnetic waves”.

Definition of Polythene:-

• A type of very thin plastic material, often used to make bags for food, etc. or to keep things dry.

Definition of Soun wave:-

• A sound wave is the pattern of disturbance caused by the movement of energy traveling through a medium (such as air, water, or any other liquid or solid matter) as it propagates away from the source of the sound. The source is some object that causes a vibration, such as a ringing telephone, or a person's vocal chords.

What is Atomic number ?

• The atomic number or proton number of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus.

Hope it helps you!! :)

have a nice day ahead ✌✌✌✌

Thankew •ᴗ•

Answer 2

Answer:

Here is your answers:

1.voltmeter- an instrument for measuring voltage is called voltmeter.

2.radiation- Radiation is energy that comes from a source and travels through space at the speed of light.

3.polythene- a type of very thin plastic material is called polythene.

4. sound wave- a wave of compression and rarefaction is called sound wave.

5.atomic number- the number of protons that a chemical element has in its centre is called atomic number.