1. What is the unit of Distance?
2. What is speedometer and Odometer?
3. Make a Distance time graph showing uniform and non-uniform motion?
4. A spaceship travels 36000 km in one hour. Express its speed in km/s.
5. What is Simple pendulum? Define Time period?
6. Mention Law of Reflection with proper diagram?
7.Write three applications of Concave mirror? Draw Concave mirror?
Answers
Answer:
1. unit of length refers to any arbitrarily chosen and accepted reference standard for measurement of length. The most common units in modern use are the metric units, used in every country globally. In the United States the U.S. customary units are also in use.
2.speedometer, instrument that indicates the speed of a vehicle, usually combined with a device known as an odometer that records the distance traveled.
3.Non-uniform motion refers to the motion where the body covers unequal distances in equal intervals of time . The graph is a curve shown in the attachment. Uniform motion refers to the motion where the body covers equal distances in equal intervals of time . The graph is a straight line .
4.Spaceship speed is 36000 km/h
So, in 1 hour spaceship travel 36000 km
Or we can say that in 60×60 second spaceship travel 36000 km
Therefore in 1 sec spaceship travel
=
= 10 km/s
5.The time period of a simple pendulum: It is defined as the time taken by the pendulum to finish one full oscillation and is denoted by “T”. The amplitude of simple pendulum: It is defined as the distance travelled by the pendulum from the equilibrium position to one side.
6.In the diagram, the ray of light approaching the mirror is known as the incident ray (labeled I in the diagram). ... The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection
7.Some of the most important and common applications of the concave mirror are described below.
Used in shaving mirrors. ...
Concave mirror uses in the ophthalmoscope. ...
Uses of concave mirror in astronomical telescopes. ...
Concave mirrors used in headlights. ...
Used in solar furnaces.
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Answer:
The SI unit for distance is the meter (m).
speedometer, instrument that indicates the speed of a vehicle, usually combined with a device known as an odometer that records the distance traveled.
Non-uniform motion refers to the motion where the body covers unequal distances in equal intervals of time . The graph is a curve shown in the attachment. Uniform motion refers to the motion where the body covers equal distances in equal intervals of time . The graph is a straight line .
Spaceship speed is 36000 km/h
So, in 1 hour spaceship travel 36000 km
Or we can say that in 60×60 second spaceship travel 36000 km
Therefore in 1 sec spaceship travel
=
= 10 km/s
The time period of a simple pendulum: It is defined as the time taken by the pendulum to finish one full oscillation and is denoted by “T”. The amplitude of simple pendulum: It is defined as the distance travelled by the pendulum from the equilibrium position to one side.
In the diagram, the ray of light approaching the mirror is known as the incident ray (labeled I in the diagram). ... The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection.
Used in shaving mirrors. ...
Concave mirror uses in the ophthalmoscope.
Uses of concave mirror in astronomical telescopes.
Concave mirrors used in headlights.
Used in solar furnaces
hope it helps you
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