![charliesteioff14](/avatars/17120.jpg)
charliesteioff14
09.04.2020 •
Physics
A small ball of mass m = 5 kg is suspended from
a string of length L = 5 m. The ball revolves
with constant speed v in a horizontal circle of
radius r = 2 m. Find an expression for v and a.
Solved
Show answers
More tips
- F Food and Cooking How to Properly Collect Mushrooms? A Comprehensive Guide...
- C Computers and Internet 3D Glasses! What is this thing?...
- C Computers and Internet How to insert videos into LiveJournal?...
- C Computers and Internet How Much Does an iPhone Cost in America?...
- F Family and Home How to Choose the Best Diapers for Your Baby?...
- F Family and Home Parquet or laminate, which is better?...
- L Leisure and Entertainment How to Properly Wind Fishing Line onto a Reel?...
- L Leisure and Entertainment How to Make a Paper Boat in Simple Steps...
- T Travel and tourism Maldives Adventures: What is the Best Season to Visit the Luxurious Beaches?...
- H Health and Medicine Kinesiology: What is it and How Does it Work?...
Answers on questions: Physics
- P Physics Imagine that you have a sample of an unknown element and that you know only the elements mass number without directly measuring the number of protons in the nucleus of...
- P Physics While in the air (neglecting air resistance) the vertical component of a projectile s acceleration -remains constant -increases -decreases...
- P Physics Need help with these 4 ASAP. if u can answer even 1 of them that would be amazing! 1. a) a mass of 5.0kg is at rest at the top of an inclined plane, 5.0m above the ground....
- P Physics Please help me with this question...
- P Physics A jet takes off from Florida and flies 100 miles north and then 400 miles west. Determine the total distance travelled by the jet....
- P Physics You find a person passed out on the beach near the water. You run down and pull them to safety by applying 1,500N of force to drag them along the ground 15m. If it took...
- P Physics How does friction affect energy...
- P Physics Dunno why some of you following me,though i didn t even provided any relevant answers...
- S Spanish ¿cuánto del territorio de costa rica está poblado por bosques?...
- A Advanced Placement (AP) Which theory of dreaming claims that dreams are random by-products of brain processes during sleep? a. wish fulfillment model b. problem solving model c. activation-synthesis...
Ответ:
Explanation:
1. Part A:
Since the points in the scatter plot show a moderated upward trend, you must expect a correlation coefficient close to ± 0.5. A correlation coefficient of 0.01 is too close to 0, which would mean that the points are almost not correlated at all.
The correlation coefficients, r, measure the strength of the correlation of two variables and they can have values from - 1 to 1.
r = - 1 is a perfect negative correlation: the points will adjust perfectly to a line with negative slope.r = + 1 is a perfect positive correlation: the points will ajdust perfectrly to a line with positive slope.r = 0 means that the variables are not correlated at all.Hence, the closer to zero, the worse the correlation is, and that is what r = 0.01 means, but the graph shows other thing.
Therefore, the calculated value of r = 0.01 is not accurate for t his scatter plot.
2. Part B.
A causal relationship means that the expllanatory variable (the independent variable) is the cause of the dependent variable.
Hence, you must find a reasonable variable that can be the cause of the number of strawberries picked.
I could imagine the amount of rainfall the week before of harvest.
Thus, the scenario could be:
Amout of rainfall in mm (x) Number of strawberries picked (y)
100 20
50 40
25 80
12.5 160
6.25 320
The amount of rainfall is the cause of the number of strawberries picked, and you could find a model (function) that relates both variables.