Question

1.The space probe Voyager 2 flew past Neptune in 1989 at a speed of 38,000 miles/hr. Then, fuel almost entirely depleted, it headed out of the Solar System towards the emptiness of interstellar space (no gravity or friction). It is still trillions of miles away from the nearest star. Will Voyager 2 ever stop, and in any case, what will 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 by electric current loops.

True

False

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 the light has a Doppler red-shift. In which direction is the galaxy moving, relative to you?

5.The galactic red-shifts, the CMB (Cosmic Microwave Background), and the fact that the universe is 25% Helium are all important bits of evidence showing that something major happened at the beginning of time. What is this big event called?

Answer 1

1) It will not stop even it doesnt have fuel to propel itself anymore. It can be easily understood through the Newton First Law of Motion, As the probe is already in motion and is not being stopped by any significant forces, so the state of object (i.e. being into motion) will reamin unaffected and it will keep moving in straight line.

2) It is TRUE.

For atoms== Spinning electron i.e. current loop

For bar magnet== again lots of atoms with spining electron aligned in a specific manner to create dipoles

For earth== it is believed there is spining of ions in core of earth giving rise to magnetic field.

3) Rose looks red because it reflects the same . B is the correct option.

4) Red shift is observed when galaxies are moving away from us.

5) The big event is famously known as THE BIG BANG, a violate explosion of an extremely hot tiny point like structure which is believed to be starting point of everything we see in the cosmos today.

Please let me know if it was helpful. Thank you!