Dale's latest activity
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Dale replied to the thread High School Does acceleration affect impact energy vs constant velocity?.The principle that you would use here is Newton’s 2nd law: $$\Sigma \vec F =m\vec a$$ where ##\Sigma \vec F## is the net force, and... -
Dale reacted to oz93666's post in the thread Undergrad Using the "triple point of water" to produce ice -- How does that work? with
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I think what they were doing was subjecting water to high vacum , this would first de gas the water and then cause it to boil , even... -
Dale reacted to jeffinbath's post in the thread Undergrad Using the "triple point of water" to produce ice -- How does that work? with
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The video stated that at the surface, water was de-aerated and ice was formed using the triple point of water principle. It even showed... -
Dale replied to the thread Undergrad Relational event horizons?.The thing is that the event horizon is a lightlike surface. That means that in any local inertial frame the event horizon moves outward... -
Dale replied to the thread Undergrad Relational event horizons?.I am not completely sure about what intuition you want to address here. Is it this: In local inertial coordinates the speed of light is... -
Dale replied to the thread Graduate Hypothesis testing: Defining H0, HA hypotheses so that ( H_A)_A' makes sense.With frequentist statistics you cannot speak of the probability of hypotheses, so you can only calculate ##P(D|H_0)##. With Bayesian... -
Dale replied to the thread Graduate Hypothesis testing: Defining H0, HA hypotheses so that ( H_A)_A' makes sense.Ah, I see your question and my confusion. Let’s say that you are doing a placebo controlled randomized test for a medicine to reduce... -
Dale reacted to WWGD's post in the thread Graduate Hypothesis testing: Defining H0, HA hypotheses so that ( H_A)_A' makes sense with
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Well, at least in the Frequentist set up , we don't get to actually accept, just conclude we don't have enough evidence to reject or not... -
Dale replied to the thread High School Does acceleration affect impact energy vs constant velocity?.Or if the distance moved at the point of application of the external force is small, then the additional energy would be negligible. -
Dale reacted to PeroK's post in the thread High School Does acceleration affect impact energy vs constant velocity? with
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It depends whether the force producing the acceleration is maintained throughout the collision. For example, if you have a vertical... -
Dale replied to the thread Undergrad Synchronizing clocks in an inertial frame if light is anisotropic.That is a matter of definitions. Some authors make that requirement, other authors do not.