0
What else can I help you with?
When does an observer at a railroad crossing hear the lowest frequency of a trains whistle?
An observer at a railroad crossing hears the lowest frequency of a train's whistle when the train is approaching. As the train moves towards the observer, the sound waves are compressed, resulting in a higher perceived frequency.
Describe your motion as seen from a reference point on the train then describe it from a reference point on the ground?
If you are *not* dealing with special relativity and its effects, then the answer becomes far more simple. If you are not moving and are standing on the ground, then you see a train moving past you a fast speed. In this case, the reference "frame" (not necessarily a point) is you and the object being described is the train. If you flipped the roles, then it would be someone on the train watching you as the train moves. However, since it is from the train's perspective, it does not appear that the train is moving, but rather that you are moving away from the train, along with the rest of the world that passes the train by. This is described as the train being the reference frame and you would be the object described by the train. This is, again, just Galilean relativity. Special relativity puts a few twists on it and has some additional effects.
how would an observer on train a witch is moving at nearly the speed of light view o'clock on train be which is moving at the same speed and in the same direction?
The observer on train B will see clock A ticking slower than their own clock due to time dilation effects at high speeds. This is a consequence of special relativity, where time is experienced differently for two observers moving relative to each other at near light speeds.
When does an observer at the crossing hear the lowest frequency of the trains whistle?
The observer at the crossing hears the lowest frequency of the train’s whistle when the train is moving away from them. This is due to the Doppler effect, where the pitch of the sound decreases as the source moves away from the observer.
How would the boy standing on hears the sound by a man in a moving train blows the train's horn. the train is moving away from a boy standing on the ground.?
The boy standing on the ground would hear the sound as the train’s horn is being blown, but the pitch would gradually decrease as the train moves away from him. This is due to the Doppler effect, where the frequency of the sound waves decreases as the source of the sound moves away from the observer.
Why does one train seem to move when other train is already moving?
Relative motion. To talk about a train moving at a certain speed usually means that the train is moving at a certain speed relative to a stationary observer (relative to the ground). This however also means that a passenger traveling in said train would experience the ground (and every other stationary object) as the moving object. This is why a stationary train may seem to be moving to passengers of an already moving train.
How fast can a man on a train run?
the answer is relative.. if you are standing on the same train, for you the man will be running as fast as it would do on the ground. If you are standing on the ground, then his speed relative to you will be the composition of the train speed + his speed. to make it more interesting.. think now that the train it's running with a speed that approach the speed of light relative to you.
Does the Doppler Effect mean that an observer ahead of a train hears the train at a higher frequency sound than an observer behind the train?
Yes that is the case.
Why does a train slow its speed while crossing a bridge?
If you've stood beside the tracks when a train is passing at speed, you might have felt the ground shake with the weight of the train. The faster it goes, the more the ground shakes. To save the bridge from being shook up that much, the train slows down.
A fly flying in a train which is moving at a speed of suppose 90 kmph moves inside with ease so is the fly also moving at 90 kmhr or is it stationary?
To a person inside the train the fly is just flying around as flies ordinarily do. To an observer outside of the train the fly is moving at 90kmh relative to the ground, with slight variations due to its flying movement. To someone observing from space, you would have to account for the earth's movement as well. The fly's movement will depend on the reference frame of the observer.
When does an observer at a railroad crossing hear the lowest frequency of a trains whistle?
An observer at a railroad crossing hears the lowest frequency of a train's whistle when the train is approaching. As the train moves towards the observer, the sound waves are compressed, resulting in a higher perceived frequency.
Describe your motion as seen from a reference point on the train then describe it from a reference point on the ground?
If you are *not* dealing with special relativity and its effects, then the answer becomes far more simple. If you are not moving and are standing on the ground, then you see a train moving past you a fast speed. In this case, the reference "frame" (not necessarily a point) is you and the object being described is the train. If you flipped the roles, then it would be someone on the train watching you as the train moves. However, since it is from the train's perspective, it does not appear that the train is moving, but rather that you are moving away from the train, along with the rest of the world that passes the train by. This is described as the train being the reference frame and you would be the object described by the train. This is, again, just Galilean relativity. Special relativity puts a few twists on it and has some additional effects.
how would an observer on train a witch is moving at nearly the speed of light view o'clock on train be which is moving at the same speed and in the same direction?
The observer on train B will see clock A ticking slower than their own clock due to time dilation effects at high speeds. This is a consequence of special relativity, where time is experienced differently for two observers moving relative to each other at near light speeds.
When does an observer at the crossing hear the lowest frequency of the trains whistle?
The observer at the crossing hears the lowest frequency of the train’s whistle when the train is moving away from them. This is due to the Doppler effect, where the pitch of the sound decreases as the source moves away from the observer.
How would the boy standing on hears the sound by a man in a moving train blows the train's horn. the train is moving away from a boy standing on the ground.?
The boy standing on the ground would hear the sound as the train’s horn is being blown, but the pitch would gradually decrease as the train moves away from him. This is due to the Doppler effect, where the frequency of the sound waves decreases as the source of the sound moves away from the observer.
How does a bouncing ping-pong on a train explain the concept of relativity?
When a ping-pong ball bounces on a moving train, its motion appears different to an observer on the train and to an observer standing still outside. This illustrates how motion is relative and depends on the observer's frame of reference. Similarly, in the theory of relativity, the laws of physics are the same for all observers, regardless of their relative motion.
What happens when a person jumping out of a moving train?
If a person jumps out of a moving train, they are at risk of serious injury or death. The impact with the ground can cause severe trauma, and the speed of the train can make it difficult to land safely. It is never safe to jump out of a moving train.
