1.The space probe Voyager 2 fl
1.The space probe Voyager 2 flew past Neptune in 1989 at a speedof 38,000 miles/hr. Then, fuel almost entirely depleted, it headedout of the Solar System towards the emptiness of interstellar space(no gravity or friction). It is still trillions of miles away fromthe nearest star. Will Voyager 2 ever stop, and in any case, whatwill happen to it in, let’s say, the next few weeks? Explain.
2.The present understanding is that the magnetism of the atom,and even of a bar magnet and the Earth, are all generated byelectric current loops.
3.A rose looks red because the rose:
(A)is transparent to red light only
(B)reflects red light only
(C)absorbs red light only
4.You measure light from a distant galaxy and discover that thelight has a Doppler red-shift. In which direction is the galaxymoving, relative to you?
5.The galactic red-shifts, the CMB (Cosmic MicrowaveBackground), and the fact that the universe is 25% Helium are allimportant bits of evidence showing that something major happened atthe beginning of time. What is this big event called?
1) It will not stop even it doesnt have fuel to propel itselfanymore. It can be easily understood through the Newton First Lawof Motion, As the probe is already in motion and is not beingstopped by any significant forces, so the state of object (i.e.being into motion) will reamin unaffected and it will keep movingin straight line.
2) It is TRUE.
For atoms== Spinning electron i.e. current loop
For bar magnet== again lots of atoms with spining electronaligned in a specific manner to create dipoles
For earth== it is believed there is spining of ions in core ofearth giving rise to magnetic field.
3) Rose looks red because it reflects the same . B is thecorrect option.
4) Red shift is observed when galaxies are moving away fromus.
5) The big event is famously known as THE BIG BANG, a violateexplosion of an extremely hot tiny point like structure which isbelieved to be starting point of everything we see in the cosmostoday.
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