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4 years ago

What is another name for a "causal loop"?

Physics

2 answers:

OleMash [197]4 years ago

8 0

B I believe but hey we also have Google to double check

zvonat [6]4 years ago

4 0

The Bootstrap Paradox.
To quote Doctor Who's explanation of it-

"So there's this man, he has a time machine. Up and down history he goes, zip, zip, zip, zip, zip, getting into scrapes. Another thing he has is a a passion for the works of Ludwig van Beethoven. And one day he thinks, 'What's the point of having a time machine if you don't get to meet your heroes?' So off he goes to 18th century Germany, but he can't find Beethoven anywhere. No one's heard of him. Not even his family have any idea who the time traveller is talking about. Beethoven literally... doesn't exist. This didn't happen by the way. I've met Beethoven. Nice chap, very intense.

Loved an arm wrestle. No, this is called the 'bootstrap paradox'. Google it. The time traveller panics. He can't bear the thought of a world without the music of Beethoven. Luckily he brought all of his Beethoven sheet music for Ludwig to sign. So he copies out all the concertos and the symphonies, and he gets them published. He becomes Beethoven. And history continues with barely a feather ruffled. But my question is this - who put those notes and phrases together? Who really composed Beethoven's 5th?"

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You are riding in a hot air balloon that, relative to the ground, has a velocity of 6.0 m/s due east. You see a hawk moving dire

charle [14.2K]

Answer:Velocity = 6.325m/s

Directional angle= 18.43°

Explanation:

Using Right angle triangle

Let Velocity of ballon&hawk be VHB represent the height of the triangle.

Let Velocity of balloon angle ground be VBG represent adjacent of the triangle.

Let Velocity of hawk and ground BE VHG represent the hypothesis.

Theta = opp/Adj= VHB/VBG

using pythagorean

VHG= SQRT(VHB^2+VBG^2)

VHG= sqrt(2^2+6^2)

VHG= sqrt(4+36)

VHG= 6.325m/s

Tan theta= 2/6

Tan theta =0.3333

Tan^-1 0.3333=18.43°

8 0

3 years ago

Which two particles in an atom are equal in number

Lemur [1.5K]

If you mean in mass, then the mass of one proton is approximately equal to the mass on one neutron. If you mean how many of each, then the number of protons is equal to the number of electrons. If the number of electrons was different from the number of protons, then you'd have an ion. An ion with a positive charge is a cation, and an ion with a negative charge is an anion.

6 0

3 years ago

Name the material used to transfer of charges from one body to other

Eduardwww [97]

Answer:

idk just needs points

Explanation:

i need 20 words so sorry ig

6 0

3 years ago

Blood is accelerated from rest to 30.0 cm/s in a distance of 1.80 cm by the left ventricle of the heart. (a) Make a sketch of th

Mila [183]

Answer:

a. Picture attached

b. V, X

c. $t=0.12 s$

d. It makes sense cosidering that a normal heart beat rate is between 60 and 100 beats per minute (bpm).

Explanation:

First we have to identify the unknown of this problem:

$a: acceleration\\t: time$

Considering the characteristics of the problem and that distance and velocity are specified, the acceleration is constant, for that reason we use the equations of uniformly accelerated motion as follows:

$v=v_{0}+at\\ x=x_{0}+ v_{0}+\frac{1}{2}at^{2}$

If we reorganize the equations, considering that $x_{0}$ and $v_{0}$ are zero because motion starts from rest , we have:

$a=\frac{v}{t} \\x=\frac{1}{2}at^{2} =\frac{1}{2}\frac{v}{t} t^{2}=\frac{1}{2} vt\\t=\frac{2x}{v} \\t=\frac{2*1.80cm}{30.0\frac{cm}{s} } \\t=0.12 s$

Finally, the analysis of the result leaves us to understand why the normal heart beat rate varies between 60 and 100 bpm.

6 0

3 years ago

Which perspective believes that behavior is learned through rewards and punishments

SCORPION-xisa [38]

Behaviorism is the aspect of psychology that believes that behavior is learned through rewards and consequences. There have been many scientific studies conducted on this idea.

8 0

3 years ago