Friday
December 13, 2013

# Posts by alexus

Total # Posts: 35

physics
Jackie exerts a 43 N horizontal force as she pulls a sled that weighs 140 N across a cement sidewalk at a constant speed. What is the coefficient of kinetic friction between the sidewalk and the sled?

Physics
A baseball goes from zero to 40 m/s in 0.159 s. What is its average acceleration? Answer in units of m/s 2

Physics
A car traveling in a straight line has a velocity of 6.03 m/s at some instant. After 6.89 s, its velocity is 10.6 m/s. What is its average acceleration in this time interval? Answer in units of m/s 2

Physics
A car travels in a straight line for 4.8 h at a constant speed of 63 km/h . What is its acceleration? Answer in units of m/s 2

US History and Constition
What is the purpose of the Monroe Doctrine ?

math
1) A light bulb producing company states that its lights will last an average of 1200 hours with a standard deviation of 200 hours. A sample of 100 light bulbs from the company were tested and the researcher found that the average life of each light bulb was 1050 hours. At a 9...

US History and Constition
1. Eli Whitney intended his cotton gin to help eliminate slave labor. Why did it increase it?

US History and Constition
1. Eli Whitney intended his cotton gin to help eliminate slave labor. Why did it increase it? 2. What is the purpose of the Monroe Doctrine in a paragraph of at least 5 sentences? 3. By 1828 presidential electors were chosen by popular vote in every state except: _____________...

Probability and Statistics
For questions 6 - 10 use the chi-squared distribution to test the hypothesis. 6) A restaurant owner wants to see if the business is good enough for him to purchase a restaurant. He asks the present owner for a breakdown of how many customers that come in for lunch each day and...

Probability and Statistics
For questions 1- 5 use confidence intervals to test the hypothesis. 1) A light bulb producing company states that its lights will last an average of 1200 hours with a standard deviation of 200 hours. A sample of 100 light bulbs from the company were tested and the researcher ...

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