![robert7248](/avatars/9793.jpg)
robert7248
27.09.2019 •
Physics
mcq (multiple choic
which one of the following is a non metal!
i. brass
ii. rubber
iti. copper
iv. silicon
Solved
Show answers
More tips
- G Goods and services How to Choose the Right High Chair for Your Baby?...
- S Style and Beauty Learn how to tie a keffiyeh on your head like a pro...
- S Style and Beauty How to braid friendship bracelets?...
- F Food and Cooking Delight for Gourmets: How to Prepare Liver Pate...
- C Computers and Internet How to Learn to Type Fast?...
- H Health and Medicine Angina: Causes, Symptoms, and Treatment...
- D Dating, Love, Relationships How to Overcome Jealousy: Tips and Tricks...
- H Health and Medicine 10 Ways to Cleanse Your Colon and Improve Your Health...
- W Work and Career How to Start Your Own Business: Tips and Recommendations...
- F Food and Cooking How to Make Delicious Cabbage Pies: The Best Recipes!...
Answers on questions: Physics
- P Physics Amass of 30.0 grams hangs at rest from the lower end of a long vertical spring. you add different amounts of additional mass δm to the end of the spring and measure the...
- B Biology Describe how much energy plants on earth generate in one year...
- C Chemistry Water is a pure substance. Which of the following is true about water? a A chemical change is required to separate the elements present in it. b A physical change is required...
- M Mathematics 1 Select the correct answer. Which expression is equivalent to the given expression? (10c6d+5)(2c-5d4) ОА. 200 d OB. 20cd OC. 20 c30020 OD. 20c30d20 Reset Next GV Awnser?...
Ответ:
ii. Rubber
Ответ:
russian is not my first language, so i'm afraid i can't write out an answer in russian, but hopefully you can find a way to do so. here's my best translation of the problem: you're given a plot of a particle's position in one-dimensional space over time, and you're asked to find either the total distance traveled by the particle after 6 seconds had elapsed, or the total displacement of the particle after 6 seconds.
if you want the total distance traveled, you would first need to determine the particle's velocity as a function of time, then integrate that over the 6-second interval. we know the position function is quadratic with roots at 0 and 6, so we have
where
is unknown. because the position is parabolic, there is symmetry about the midpoint at
, and we know that
so that the position function is
which means the velocity is
then the total distance traveled is
so the total distance traveled is 20 m.
on the other hand, if you want to find displacement: the particle starts at
and ends at
, so its displacement is 0.