80. A person is standing in front of a big plane mirror. The distance between the mirror and his image is 5 m.
If the person moves 2 m towards the plane mirror, what would be the distance between the person and
his image ?
81. The rear view mirror of a car is a plane mirror. The driver can see the image of a bus parked behind his car
in the rear view mirror. If the driver reverses his car at a speed of 0.75 m/s, at which speed the image of
bus will appear to approach the car driver?
Answers
Explanation:
All secondary storage devices which are capable of storing high volume data is referred to secondary memory. It's slower than primary memory. However, it can save a substantial amount of data, in the range of gigabytes to terabytes. This memory is also called backup storage or mass storage media
Explanation:
80. A person is standing in front of a big plane mirror. The distance between the mirror and his image is 5 m.
If the person moves 2 m towards the plane mirror, what would be the distance between the person and
his image ?
81. The rear view mirror of a car is a plane mirror. The driver can see the image of a bus parked behind his car
in the rear view mirror. If the driver reverses his car at a speed of 0.75 m/s, at which speed the image of
bus will appear to approach the car driver
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