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• Today, 04:48 PM
you have 2 equations and 2 unknowns. 0.108A+0.353B=382 0.402A+0.158B=566 where, A=units of product A and B=units of product B
3 replies | 45 view(s)
• Yesterday, 01:16 PM
"modelled as that of a particle moving freely under gravity" means you ignore the drag on the particle by the air.
2 replies | 74 view(s)
• 09-21-2018, 08:48 PM
you know the sin, so you know an angle. you know there are 1800 in a triangle. and that two angles are equal. and you know 2 sides.
5 replies | 119 view(s)
• 09-18-2018, 09:45 PM
in a way it is. the length you describe will have the same measurement as the circumference.
5 replies | 149 view(s)
• 09-18-2018, 09:36 PM
distance=2+y2]1/2
4 replies | 138 view(s)
• 09-13-2018, 09:03 PM
pathagorean theorem?
9 replies | 248 view(s)
• 09-11-2018, 05:14 PM
to figure the angle without protractor, use a framing square and find two sides of a rt triangle. Once you know two lengths, you can calculate the...
5 replies | 126 view(s)
• 09-10-2018, 11:09 PM
int(r2-x2)1/2dx, limits x=x, 0 (x is upper limit, 0 is lower limit) =int r(1-x2/r2)1/2dx sub x/r=sin& =r2int cos2&d&, limits &=sin-1(x/r), 0 ??...
1 replies | 94 view(s)
• 09-08-2018, 10:53 PM
you are right, rate of change of angle = pi radians/min. (2 revolutions in 2 min) and also, rate of change in arc length = radius*rate of change in...
2 replies | 130 view(s)
• 09-07-2018, 02:35 PM
My mistake. I changed 'hemipsherical' to 'spherical' in my post. I know. What he needs is a 3-d integration of a partially filled cup. That is...
17 replies | 645 view(s)
• 09-05-2018, 08:01 PM
the eqn gives volume of a spherical cap filled to depth d.
17 replies | 645 view(s)
• 09-05-2018, 12:54 PM
yes, integration is required. the resulting eqn does satisfy 1/2 full and full. pls double check. cap is a hemisphere of radius r; d=depth of...
17 replies | 645 view(s)
• 09-04-2018, 07:43 PM
you multiply the top and bottom by the same number, always (you are multiplying the fraction by 1) 3/8/4, you multiply 8/8; =3/32
12 replies | 343 view(s)
• 09-04-2018, 06:45 PM
for cap of spherical radius r, cap is 1/2 a sphere V=pi/6d2(3r-d); where d=depth of liquid for cylinder of length L and radius r, h is distance...
17 replies | 645 view(s)
• 09-03-2018, 07:45 PM
given the spherical cup volume formula in terms of r, h; and assuming this is correct; to put the formula in terms of a,h, use r2=a2+h2 then for...
17 replies | 645 view(s)
• 09-03-2018, 06:40 PM
others have caught your mistake, i.e. 2-3=1/8 it is sometimes easier to get rid of negative exponents, e.g. (2/x3y2)-3 =(x3y2/2)3 = x9y6/8
12 replies | 343 view(s)
• 09-03-2018, 06:13 PM
it is not easy to see what to do, so draw a picture, (of a field, shading in the amt plowed by each person). then you can see one person plows 1/12...
10 replies | 420 view(s)
• 09-02-2018, 05:54 PM
start with the question. How many sheep in the field are likely to be black, mature, rams? you know first you have 40 rams, (40% of 100). then...
4 replies | 248 view(s)
• 09-02-2018, 05:20 PM
sq roots can be + or -. plug your possible solns back into the initial equations. you will see that -1 is the soln for sqrt x, (and y=4). what...
6 replies | 273 view(s)
• 09-02-2018, 04:49 PM
I was trying help him picture the problem. where a line between the two given pts is the distance between them. then 3/4 the way down that line is...
6 replies | 319 view(s)
• 09-02-2018, 03:34 PM
for all of these except no.2, draw a picture.
5 replies | 257 view(s)
• 09-02-2018, 12:57 PM
I think it means you draw a line from (0,4) to (2,0) then one point you need is at 3/4 this distance.
6 replies | 319 view(s)
• 08-30-2018, 08:18 PM
before answering your question Dr. Peterson; I will attempt to answer the original poster's question. the wt of the chain is the sum of the...
7 replies | 317 view(s)
• 08-29-2018, 04:37 PM
the tension in the chain is 25N. component is 25sin37, and its horizontal is 25cos37.] however, the only direction the chain can transmit force is...
7 replies | 317 view(s)
• 08-29-2018, 10:42 AM
draw a free body diagram. the tension is along the length of the chain. it is true that the wt pulls down, but you are analyzing the tension. That...
7 replies | 317 view(s)
• 08-28-2018, 03:58 PM
I believe you are thinking about it correctly. when you know the slope of the tangent, the normal line will be 900 to that, and is the negative...
6 replies | 224 view(s)
• 08-27-2018, 07:20 PM
did you understand how to get the distance? distance is same for both trains. you know the speed and time of the diesel train, so you can...
4 replies | 266 view(s)
• 08-27-2018, 02:38 PM
good show, Dr Peterson. It occured to me that from here you could rewrite each term as a product, . i.e. x2(x​-1/2 )+ 4x(x​-1/2 ) + 6(x​-1/2 )...
6 replies | 334 view(s)
• 08-24-2018, 08:29 PM
sqrtx=x1/2, cube rt x2=x2/3 you want a common denominator. so you need a common power of x, (and of course common number in front). i.e. change...
15 replies | 626 view(s)
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