Space-time is kind of a big deal. As we discussed in class, when distorted by matter (massive bodies like planets, moons, etc.), it creates the sense of gravity. Earth's gravititational tug-of-war with the moon in turn is responsible for causing the Earth's tides. Gravity also causes light to bend, streeeeeetching our perception of time.
Don't worry!....both concepts take awhile to get one's head around. Here's your assignment:
Watch the video (to the right) about space-time AND watch the full animation about tides (http://www.onr.navy.mil/focus/ocean/motion/tides1.htm) -- the total viewing time is less than 5 minutes. Then post a SPECIFIC question you have about EACH concept that you want answered in class.
(That means two questions from everyone. Oh, and by the way, "I don't get space-time?" doesn't count as a good, specific question!) ;)
We'll discuss your questions in class during our next meeting and get to the bottom of these topics.
Regarding the first video, what if the "giant weight at the center" was moved to the far side? Would the smaller object simply have to travel more distance around the object, or would it roll towards the object and spin in a smaller circle, such as when the object is nearer in the center of the room?
ReplyDeleteThe oceanography website proclaims that the Sun and Moon pull on the Earth, but is the gravitational pull from other nearby planets strong enough to impact the tides on Earth? The moon orbits around Earth and Earth around the Sun... is this orbit relationship necessary to effect the tides or could say.. Mars.. impact Earth's tides?
For the video- why does space and time contract or expand in the presence of matter?
ReplyDeleteFor the animation- Why does the moon have such a great effect on our planet if we have a larger mass? Wouldn't the extent of our differences in size prevent the moon from inflicting any power on Earth?
Animation: why can the moon create tides on the farthest side away from the earth that are equal to the tides created on the earth's side that is closest to the moon?
ReplyDeleteMovie: Why is it that because you could see stars through the sun's eclipse, the theory of space-time was proven? The stars didn't actually move did they?
Video: How can you measure how much an object's mass (bending the space and time's interwoven fabric) can effect another object's trajectory?
ReplyDeleteAnimation: Why does it take the earth 50 min. to catch up with the orbiting moon?
Video: Is light affected by gravity the same way that a ball is affected by gravity?
ReplyDeleteAnimation: When is a tide at its highest, day or night? Why.
Video: Why do they refer to it as a "fabric"? What do they mean by fabric? (Obviously not literally fabric...)
ReplyDeleteAnimation: Does the time of day effect how strong the moon (or sun) pulls the tide?
Video Question: How does time warp? Also does space and time exist inside a black hole?
ReplyDeleteAnimation Question: What is the difference between a regular tide and a neap tide?
1: I always thought that gravity was a force, but Neil Tyson from the video said that it is not a force, but a fabric. Is gravity a force, a fabric, or both?
ReplyDelete2: the moon is so much smaller than the sun that the gravitational from the moon should balance out with that of the sun even though the moon is much closer. Why doesn't it?
Video Question: When the ball speeds across the Trampoline of Gravity, why is it drawn to the ball at the center, despite going at such a high speed?
ReplyDeleteAnimation question: If gravity is always pulling towards the moon, what causes the tide on the opposite side of the earth?
1) How does space and time work on objects such as planes or submarines?
ReplyDelete2) Does the moon's gravitational pull also attribute to floods and or hurricanes?
Video: I understand that space and time are in fact one relative concept, however, i was confused as to what it means to BEND space-time. In other words, what is the literal equivalent of the ball creating a dent in the weave of space and time?
ReplyDeleteAnimation: Why are the tide's equal on 2 sides of the earth? The tide opposite of the side pulling towards the moon was just as high as the tide being pulled by the moon.
Video: How is space-time relativity different than general relativity?
ReplyDeleteAnimation: If when at a 90 degree angle, the sun and moon's pulls work against each other, why aren't the tides' difference more prominent instead of being less as they are in neap tides?
Video: When I typically think of gravity, I envision it as a constant accelerator that increases an object's speed and pulls it downwards as it falls towards the ground. However, this video (as I guess it's supposed to) completely distorts my original view of gravity. A question that I have after watching this video is: why do we not bounce around and feel lightweight on the Earth as one does on the Moon? And also, in the demonstration where the ball travels towards the weight at the center, would there ever be an external force that would cause it to not travel directly towards the center? Furthermore, would the ball ever hit the weight at the center?
ReplyDeleteAnimation: I understand that both the Sun and the Moon play a role in the Earth's tides, but do other planets affect them as well? In particular, planets that are closer to the Earth than the Sun such as Venus or Mars (directly on opposite sides of the Earth), or even Mercury?
for the animated video on the marine website: how come the water isn't highest on one side when the sun and moon are lined up? shouldn't their combined gravitational pull cause a surge on that side, instead of a balance between both sides(the right and left)? (i hope you can understand my question, it's a little confusing!)
ReplyDeletevideo: what factors go in to determining which mass an object will orbit around? bigger mass or closer distance? for example, the earth is closer, but the sun has a much larger mass. how come the moon doesn't get sucked into the sun's gravitational pull when it gets close?
Space-Time. Wow.
ReplyDelete1) In the video, Exactly how does "space-time" cause light to bend, and how does it affect our perception of time?
2) Why is it that when the moon and sun are on the same side of Earth, high tides are on both sides of earth (the side with Sun&Moon, side without any), and not only on the side with the sun and moon?
VIDEO: Since gravity naturally goes towards a center mass or center location, is it physically possible to change the specific direction in which the gravitational force is pulling?
ReplyDeleteANIMATION: In the animation we see that the moon and sun can alter high and low tides, does this mean that weather and natural disasters are affected by the sun, the moon and earth?
Video: Can you further explain what Neil deGrasse Tyson was saying about gravity not being a force but a fabric?
ReplyDeleteAnimation: How does the moon have such an influence on earths tides even though it it very small compared to us?
In the video- What factor does gravity play on light compared to a stick.
ReplyDeleteIn the Animation- Why does the moon and the sun only have an effect of water rather than on dirt, etc.
VIDEO: I don't fully understand Einstein's statement that "Not even light can escape the effects of gravity." I don't quite what he means and when the video went on to give an example, I still could not understand.
ReplyDeleteANIMATION: Why does the closer moon make a bigger impact on the tides than the distant sun? The sun is significantly larger than the moon, so why would the moon have control over low and high tides?
Video - Since light is affected by gravity is this the reason why we can see stars even though they are millions of years old? Why can we see these stars even though they have exploded or where there millions of years ago and are actually "Dead'?
ReplyDeleteAnimation - How come when the moon and sun and Earth are aligned they create the biggest tides/waves? Would this also be why there are tsunamis and floods?
Video: How does gravity have an effect on light? Is it a completely different effect than on an object?
ReplyDeleteAnimation: Does the moon have an effect on anything else besides tides?
1. If gravity is not a "force" but "fabric" is it tangible to us and we just don't realize, or is it not.
ReplyDelete2. Does the moon have effects on all moving water on earth?
Video: How do you visualize the space time continuum?
ReplyDeleteAnimation: If the moon during when it is about 180 degrees to the sun (opposite side of Earth and/or eclipsed to the sun) why does high tide occur almost equally on one side of Earth where the moon is "present" and the other where it is not present?
VIDEO: How is gravity not a force but a fabric?..unless I understood that wrong! haha
ReplyDeleteANIMATION: How do we tell the difference between the "nead" tides and normal tides?
Video: How do space and time curve?
ReplyDeleteAnimation: Why does the tide change with the moon?
Video: At around 2:38 the man states that gravity is not a force but instead of a fabric- how does that work? Is gravity a constant accelerator but when looking at the universe as a whole it has a different role or way to be understood?
ReplyDeleteAnimation: With both the sun and the moon being so far away from Earth, how does their gravitational pull affect it? When neap tides happen, why is that the gap between low and high tides is smaller if both forces are working against each other?
NUMBER 1: How does gravity or speed have influence on time, in relation to space time? I remember hearing that people travelling in a space shuttle, will experience less time than someone moving at a slower speed. Is this true?
ReplyDeleteNUMBER 2: I understand how the tide follows the gravity of nearby bodies of large mass, but why does it seem to do this on the opposite side as well?
1.) In the video to the right, when the person gets inside the ball and the ball is launched, why does the ball with the person in it have its trajectory only curve a little and it does not go straight at the brown ball since it has gravity within it?
ReplyDelete2.) In the animation, why does the moon have more influence on the water than the sun? Is it their because of its size or the size its gravity field?
1) Space-Time: I am having trouble with the statement that "gravity is not really a force, it's a fabric, it's a shape of space and time" because I've always been taught and thought of gravity as the thing that forces us humans to stay standing on the ground, or the thing that forces whatever is thrown up to come back down again. Is this concept of gravity as a fabric and the concept of space-time limited to space? Other than in class experiments like the one we had in class today, I don't see smaller objects orbiting around more massive objects when thrown near them.
ReplyDelete2) Tides: Why is it that the Moon creates high tide bulges of water on the side of the planet it's nearest to and on the opposite side of the planet, rather than the bulge just getting smaller as the distance from the moon increases? Also, I understand what happens to make spring and neap tides, but WHY are the end results what they are?
Space-time: For the video when the woman gets on the gravity ride, wouldn't she move further out because her weight adds more mass to the object she's in?
ReplyDeleteTides: How does the moon affect the creation of a tsunami, and which tide would create the tsunami?
space-time: Why is it that light cannot escape the effects of gravity? Since light travels fast, wouldn't light move quickly being able to avoid bending?
ReplyDeleteanimation: How are tides affected by the rotation of the earth around the sun and the moon around the earth?
Video: When we look down are we technically looking into the past because the further away an object is the greater the difference in time?
ReplyDeleteAnimation: If the sun was close enough to have a greater gravitational pull on the earth would humans be yanked off first or would the planet and humans be sucked in at the same time?
Video- In the video, the man states that gravity is in fact not a force. I'm extremely confused about this statement, because I thought that gravity was indeed a force. How is gravity not necessarily considered to be a force?
ReplyDeleteAnimation: Im slightly confused with the different types of tides. What is the difference between mixed tides and neap tides? Does one tide cause the other tide to take place? Are they at all similar?