What is the speed of hair growth in m/s?

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In summary, the question is asking for the speed of hair growth in meters per second, with a given rate of 5mm per week. After converting the units and calculating, the answer is 8 x 10-9 m/s. However, none of the multiple choice options match this answer, with the closest being 5 x 10-9 m/s. It appears there may be an error with the test or a misunderstanding of the question.
  • #1
BogMonkey
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I'm looking at a multiple choice test here and here's one of the questions
Q.) Your hair grows 5mm per week. What is its speed in m/s?

I calculating everything to appropriate units and got
time = 604800 seconds
length = 0.005 metres
then to get the rate of metres per second I divided 0.005m / 604800s and got
8 x 10-9 m/s
None of the multiple choices match that answer though. The closest answer is 5 x 10-9 m/s
I assume I did something wrong here but I can't see what.
 
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  • #2
Your answer looks good to me. The creator of the test must have made an error, or you have read the question incorrectly.
 
  • #3
Thanks.
 

FAQ: What is the speed of hair growth in m/s?

What is the formula for calculating meters per second?

The formula for calculating meters per second is distance divided by time, or m/s = d/t. This formula is used to determine the speed or velocity of an object.

How do you convert from kilometers per hour to meters per second?

To convert from kilometers per hour (km/h) to meters per second (m/s), you can use the following formula: m/s = (km/h * 1000) / 3600. This is because 1 kilometer is equal to 1000 meters, and 1 hour is equal to 3600 seconds.

Why is it important to calculate meters per second?

Calculating meters per second is important because it allows us to measure and understand the speed or velocity of an object. This is crucial in various scientific fields such as physics, engineering, and sports.

What are the units for meters per second?

The units for meters per second are meters (distance) per second (time). This is a standard unit for measuring speed or velocity in the metric system.

Can meters per second be negative?

Yes, meters per second can be negative. A negative value indicates that the object is moving in the opposite direction of the chosen reference point. For example, if a car is moving west with a velocity of -10 m/s, it means that it is moving 10 meters per second towards the east.

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