![mooredollie](/avatars/46675.jpg)
mooredollie
27.02.2020 •
Biology
A record turntable is rotating at 33 rev/min. A watermelon seed is on the turntable 7.8 cm from the axis of rotation. (a) Calculate the acceleration of the seed, assuming that it does not slip. (b) What is the minimum value of the coefficient of static friction between the seed and the turntable if the seed is not to slip
Solved
Show answers
More tips
- S Style and Beauty How to Choose the Perfect Hair Straightener?...
- F Family and Home Why Having Pets at Home is Good for Your Health...
- H Health and Medicine How to perform artificial respiration?...
- H Health and Medicine 10 Tips for Avoiding Vitamin Deficiency...
- F Food and Cooking How to Properly Cook Buckwheat?...
- F Food and Cooking How Many Grams Are In a Tablespoon?...
- L Leisure and Entertainment Carving: History and Techniques for Creating Vegetable and Fruit Decorations...
- P Photography and Videography How to Choose the Perfect Photo Paper for Your Images?...
- H Health and Medicine What vaccines do children need?...
- H Health and Medicine Reasons for the Appearance of Warts: Everything You Need to Know...
Answers on questions: Biology
- B Biology PLEASE HELP IM REALLY BEGGING I NEED THIS SO BAD PLEASEEEE...
- B Biology During a weber test the arm of a tuning fork was placed on the patient s forehead. She was able to hear the tone in the left ear, but not in the right ear. Explain what...
- B Biology I don t understand because am Mexican ayuda no le entiendo....
- B Biology Which extra-embryonic membrane is formed from the trophoblast after implantation?...
- B Biology Mitchell records the amount of time a toy car takes to travel down a ramp one time for each of four slope angles. His lab partner Sarah suggests that he run the same set...
- B Biology A blood test can be used to determine whether a person has Ebola. People with Ebola have large numbers of specific plasma cells and a specific antibody in their blood....
- B Biology What are the jobs or the nasal cavity? Select all that apply?...
- B Biology No words,I just need help ♀️ ofc...
- B Biology Which statements about nuclear fusion are false? select the two correct answers. (1 point) A) nuclear fusion releases large amounts of energy B) the fuel for nuclear fusion...
- B Biology Which of the following reactions in glycolysis requires ATP as a substrate?A) HexokinaseB) Glyceraldehyde-3-phosphate dehydrogenaseC) Pyruvate kinaseD) AldolaseE) Phosphoglycerate...
Ответ:
Given data:
● Angular velocity of the turntable ω = 33 rev/min
Therefore,
ω = 33 rev/min
ω = 33rev/min × 2π rad/rev × 1 min/60 sec = 3.45 rad/s
● The distance of the watermelon seed from the axis of rotation r = 7.8 cm = 0.078 m
● μs = the coefficient of static friction
Section a:
The seed is undergoes circular motion and it is been effected by centripetal acceleration.
ac = rω^2
ac = 0.078 × 3.45^2
ac = 0.9284 m/s^2
Therefore,
the centripetal acceleration of the seed is 9.274 m/s^2
Section b:
If the seed is observed not to slip at the course of the circular motion, then the supplied frictional force given by the seed and surface of turntable would at least be equivalent to the centripetal force working on the seed.
Centripetal Force = Frictional Force
mrω^2 = μsmg
μs = rω^2 /g
μs = 0.078 × 3.45^2
9.81
μs = 0.09464
Thus,
the coefficient of static friction is 0.09464.
Ответ:
The correct answer is option b, 0.3m/s
Step by Step solution:
The relation between speed, wavelength and frequency of a wave is given by the following equation:
Speed = Wavelength x Frequency
Substituting the values in above equation we get –
= 3 x 0.1
= 0.3 m/s