What is the minimum height of a planar mirror placed in a vertical plane 2m distant that will permit a person 2m tall to see the
1 answer:
Answer:
Height of mirror will be 1 m for complete image of person
Explanation:
We have given distance of person from plane mirror d = 2 m
And height of person = 2 m
We have to find the height of plane mirror which given full image of person
Height of mirror will be equal to half of height of person
So height of mirror
So height of mirror will be 1 m for complete image of person
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Answer:
500Km
Explanation:
This question is an example of speed, distance, time.
The formula for working out the distance is:
To work this out you would need to multiply the speed of 200Km/h by the time of 2.5 hours, this gives you 500 Km. This is because the formula to work out the distance is speed * time.
In adittion, if the train is traveling at 200km per hour then that means that over the course of an hour the distance travelled would be 200Km. So, by multiplying the speed by the time you are working out how far it travelled in that given time.
1) Multiply 200 by 2.5.