Height Questions, Etc.
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1) Women in the age group 19 to 22 have an average height of 5 feet. What is this height in meters?
2) Convert 50 KM/ hr to m/s.
3) A car is traveling at 75 MPH and comes to a stop in 600 feet in 2 seconds. What is the car's acceleration in m/s^2? NOTE: m/s^2 means meters per second squared.
4) On Mars, gravity (G) = 3.7 m/s^2. A watermelon weighs 4 KG on earth. What would it weigh on Mars?
5) A ball dropped from a tree. How many feet does it fall in 2 seconds?
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Solution Summary
Height questions for women aged 19-22 are determined.
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Women in the age group 19 to 22 have an average height of 5 feet. What is this height in meters?5
Answer .
As 1 foot=0.3048 meters,
5 feet = 0.3048*5=1.524 meters
Convert 50 KM/ hr to m/s.
Answer .
As 1 hour =3600 seconds, and 1 km=1000 m, we have
50 ...
Education
- BSc , Wuhan Univ. China
- MA, Shandong Univ.
Recent Feedback
- "Your solution, looks excellent. I recognize things from previous chapters. I have seen the standard deviation formula you used to get 5.154. I do understand the Central Limit Theorem needs the sample size (n) to be greater than 30, we have 100. I do understand the sample mean(s) of the population will follow a normal distribution, and that CLT states the sample mean of population is the population (mean), we have 143.74. But when and WHY do we use the standard deviation formula where you got 5.154. WHEN & Why use standard deviation of the sample mean. I don't understand, why don't we simply use the "100" I understand that standard deviation is the square root of variance. I do understand that the variance is the square of the differences of each sample data value minus the mean. But somehow, why not use 100, why use standard deviation of sample mean? Please help explain."
- "excellent work"
- "Thank you so much for all of your help!!! I will be posting another assignment. Please let me know (once posted), if the credits I'm offering is enough or you ! Thanks again!"
- "Thank you"
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