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BvU's latest activity
BvU
replied to the thread
Comp Sci
IEEE-754 Precision Format
.
Yes, see #8: the hex representation of the smallest number > 2 is 40000001 I have muddied the waters by a practical interpretation --...
Friday, 2:29 AM
BvU
replied to the thread
Comp Sci
IEEE-754 Precision Format
.
The question is then: does the problem statement in #1 include this rounding (which is demonstrated in practice in the last block in #8...
Friday, 2:15 AM
BvU
reacted to
pbuk's post
in the thread
Comp Sci
IEEE-754 Precision Format
with
Like
.
@BvU you are confusing rounding epsilon with interval epsilon. @arhzz given that 2 is twice the size of 1 it should be obvious that...
Friday, 2:05 AM
BvU
replied to the thread
X and Y coordinates of an oscillating object on a spring.
.
So: no! Spring not stretched in the ##y## direction at ##t=0## doesn't mean never stretched. ##\dot y \ne 0## at t=0 means it does gets...
Thursday, 5:26 AM
BvU
replied to the thread
X and Y coordinates of an oscillating object on a spring.
.
In first instance this is math. You have two seond order differential equations, so four initial conditions. For example ##x, \dot x, y...
Thursday, 5:20 AM
BvU
replied to the thread
Comp Sci
IEEE-754 Precision Format
.
I have shown that it is not the right answer (for my compiler). But probably the intended answer for a) is 2**(-23) Up to you :smile: !
Wednesday, 5:03 PM
BvU
replied to the thread
Comp Sci
IEEE-754 Precision Format
.
So far I have done some trials starting with real*4 Y = 2.0 which is stored as 40000000 (in hexadecimal). Adding 2**(-23) (decimal...
Wednesday, 4:23 PM
BvU
replied to the thread
Comp Sci
IEEE-754 Precision Format
.
Oops, messed up. Back later.
Wednesday, 1:05 PM
BvU
replied to the thread
A
Circuit ODE with multiple short voltage impulses
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:welcome: The response of the system is simply a summation of the responses to the pulses from the past: ##V_0## at ##\tau_0##, so...
Wednesday, 1:04 PM
BvU
replied to the thread
Comp Sci
IEEE-754 Precision Format
.
I thought. But it's more complicated. Trial and error, at least for me now. I figured the ##\varepsilon## for your part a) would be...
Wednesday, 12:20 PM
BvU
replied to the thread
Comp Sci
IEEE-754 Precision Format
.
The key is in "real*4 2.0 is hexadecimal 40000000"
Wednesday, 10:53 AM
BvU
replied to the thread
Comp Sci
IEEE-754 Precision Format
.
It means you have to reconsider your answer for a). real*4 2.0 is hexadecimal 40000000 2-23 = 1.1920929E-07 is hexadecimal 34000000 and...
Wednesday, 7:01 AM
BvU
replied to the thread
Comp Sci
IEEE-754 Precision Format
.
And please use a decimal point, not a decimal comma ... :rolleyes: What do you think of this: [edit] And I did ##\qquad##Y = 2 + ε...
Tuesday, 5:18 PM
BvU
replied to the thread
Universal gravitation’s problem -- Balancing gravitational forces from 2 masses
.
With a small sketch things become easier: In number 1 you have $$ F={G\,m_1m_2\over L^2} $$so in number 2 you want $$ {G\,m_1m_3\over...
Tuesday, 7:10 AM
BvU
reacted to
renormalize's post
in the thread
I
Video: 'How electricity actually works'
with
Like
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Thank you for the diagram. You may have a misconception regarding the EM Poynting power flow. While it's true that there is some small...
Tuesday, 3:13 AM
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