An Introduction To Home Gardening""Home Gardening 101: A Beginner's Guide

  • Thread starter Thread starter wegnes
  • Start date Start date
  • Tags Tags
    Home Introduction
Click For Summary

Homework Help Overview

The discussion revolves around a problem involving the temperature change of a can of varnish when moved from a cooler environment to a warmer one. The original poster seeks to determine how much longer they need to wait for the varnish to reach an ideal temperature for use.

Discussion Character

  • Exploratory, Assumption checking, Mathematical reasoning

Approaches and Questions Raised

  • Participants inquire about the level of study of the original poster to gauge the complexity of the expected answer. There are discussions about whether the temperature change can be assumed to be linear or if calculus is necessary. The original poster shares their attempts at calculating the time needed for the varnish to reach the ideal temperature using a proportional reasoning approach and mentions Newton's law of heating and cooling.

Discussion Status

The discussion is ongoing, with participants questioning the assumptions made by the original poster and seeking clarification on their calculations. Some guidance has been offered regarding the application of Newton's law of heating and cooling, but there is no explicit consensus on the correct approach yet.

Contextual Notes

The original poster indicates they are at a precalculus level and expresses uncertainty about their calculations and the application of relevant equations. There is a mention of a potential lack of information provided in the problem statement.

wegnes
Messages
6
Reaction score
0
 
Physics news on Phys.org
a can of varnish that was stored @ 40 deg F was brought in a living room where the temp is controlled at a constant 74 deg F. After 2 hours the Temp of the varnish has risen to 58 deg F. For best results the ideal Temp to use the varnish is 68 deg F. How much longer do we have to wait to use the varnish and get best results?
Please help!
 
Help by telling you the answer? What have you done on this yourself?
 
A few questions for you:

1) What level of study are you at? (This will help the community identify what is likely the desired answer)

2) Were you given any other information in this problem?The reason I ask is that, if one assumes that temperature change in this problem is linear, then the problem is straightforward. If you've learned calculus, this changes things.
 
I am in precalculus, here's what I tried...

BrendanH said:
A few questions for you:

1) What level of study are you at? (This will help the community identify what is likely the desired answer)

2) Were you given any other information in this problem?


The reason I ask is that, if one assumes that temperature change in this problem is linear, then the problem is straightforward. If you've learned calculus, this changes things.


I tried 2 hr/18 degrees x 10 degress = 1.11
 
Regarding the story problem ques:

I am new to this website. I apologize for not showing my work. I have worked on it a lot actually I just don't know if I'm right or not.

I tried...
2 hr/ 18 degrees x 10 degrees = degrees cancel so 1.11 hour

I tried also with the Newtons law of heating and cooling equation: but not sure if the K value I come up with using t= 2 hours and the temp difference 40 to 58 it the one I should use to find the time when the temp changes 10 more degrees.
 
I have no idea what you mean by "I tried...2 hr/ 18 degrees x 10 degrees = degrees cancel so 1.11 hour". Surely you don't mean you just put numbers together randomly!

Newton's law of heating and cooling applies here. Please show us exactly what you did.
 

Similar threads

Working With A Rectangular Garden
  • · Replies 7 ·
Replies
7
Views
2K
Optimal Garden Shape for Minimizing Fencing
  • · Replies 24 ·
Replies
24
Views
5K
Chemical Garden, deeper conceptual explanation
  • · Replies 3 ·
Replies
3
Views
2K
Meteorite - home delivery - and warm
  • · Replies 15 ·
Replies
15
Views
3K
Getting rid of millipedes that are infesting plants in garden
  • · Replies 10 ·
Replies
10
Views
5K
'How Does Your Garden Grow' thread - raised beds
  • · Replies 36 ·
2
Replies
36
Views
3K
Electronics My home solar energy generation and control system
  • · Replies 9 ·
Replies
9
Views
2K
Electro-chemical degradation of stainless steel wire in my garden Slug-o-Cuter?
  • · Replies 5 ·
Replies
5
Views
2K
Lawn/Garden Home project help please - max wind speed to tip over object
  • · Replies 8 ·
Replies
8
Views
4K
Lawn/Garden Cycling water, nutrients in pots, garden beds, containers, hydroponics
  • · Replies 2 ·
Replies
2
Views
3K