SPARKLING SUMMER WORKSHEETS
PHYSICS - 5
1. What is the fastest moving living being of the animal kingdom ?
2. What is the largest earth quake and what is its magnitude ?
3. What are the waves which the blue whales used to communicate in water ?
4. How old is the Sun and what are its major components ?
5. Do you know, how the distance between the astronomical bodies are measured ?
6. What is the material used to make permanant magnets ?
7. What is the galaxy that can be seen with the naked eye from the earth.
8. People are asked to stay away from the fast moving objects like trains. Why ?
9. Who used the first magnetic compass for navigation ?
10. What is the most abundant element in the Earth’s atmosphere ?
11. LASER stands for ?
12. SONAR stands for ?
13. Can you guess the speed of solar system through the space ?
14. Do you know how much amount of g force acts on your body when you sneeze ?
15. Do you know, how to calculate the weight of a body ?
16. Do you know how many times a light ray can travel round the world in one second ?
17. Do you know what is the speed of electric currents that send messages via the nerves to the brain and
from brain to the nerves ?
18. Do you know where the world’s biggest light bulb sits ?
19. Which country has the highest number of time zones and how many ?
20. What are the phrases A.M and P.M stand for ?
Answers
Answer:1.The speed of time.Ans :If you traveled at the speed of light, time would stop. According to Einstein’s Theory of Special Rela-tivity, the faster you go, the slower time passes for you relative to your surroundings. Seriously—if youzip around in a Ferrari for an hour, you’ll have aged ever-so-slightly less than if you had just chilled athome on the computer. The extra nanoseconds you get out of it might not be worth the price of gas,but hey, it’s an option. Now, before you whip up a get-immortal-quick scheme, note that moving atthe speed of light isn’t actually possible, unless you happen to be made of light. Technically speaking,moving that fast would require an infinite amount of energy (and frankly, not even a Chihuahua has thatmuch energy).2.Spot that star.Ans :Our sun bends light. Affected by gravity, the path of a beam of light is not entirely straight. So if abeam of light from a distant star passes close to our sun, it will actually bend slightly around it.The effect on an observer—like us—is that we see stars in different spots than they are actuallylocated.3.Where’s the mass hiding?Ans :The amount of total mass in the universe is vastly greater than the mass we can actually account for.Physicists developed an explanation for this, and the leading theory right now is that dark matter—amysterious substance that emits no light—accounts for the missing mass. Dark matter and dark en-ergy account for approximately 95% of the mass in the universe.4.Understanding cosmic expansion.Ans :Here’s where things get a little trippy. Before it was a TV show, the Big Bang Theory was an impor-tant explanation for the origin of our universe. Basically, the universe started as an explosion. Debris(planets, stars, etc) was flung around in all directions, driven by the enormous energy of the blast.Because all of this debris is so heavy, we would expect this explosion to slow down after a while. Here’sthe catch: it hasn’t slowed down at all. In fact, the universe is expanding faster over time. This as crazyas if you threw a baseball that kept getting faster and faster, never falling back to the ground. Theprevailing explanation for this is that force exerted by dark matter and energy is propelling cosmicexpansion.5.So many hydrogen atoms.Ans :The most abundant atom in the universe is the hydrogen atom. Nearly 74% of the atoms in the MilkyWay galaxy are hydrogen atoms.
6. Say what now? Ans : Electrons behave differently when it’s being observed. That’s right, The mere act of observation can completely change the outcome of an event! In the famous Double Slit Experiment, researches proved that hen a camera observes electrons, they act as particles. However, when the no equipment is used to observe the electrons, they act as waves and particles simultaneously. There’s enormous disagreement and lack of certainty as to why this occurs. 7. Feather vs. bowling ball. Ans : All objects fall at the same speed. You would be forgiven for assuming that heavier objects fall faster than lighter ones—it sounds like common sense, and besides, a bowling ball drops more quickly than a feather. But really the force of gravity pulls the objects toward the center of the earth at precisely the same speed. It’s air resistance that accounts for the feather’s slower flight. This means that if you repeated the feather vs. bowling ball experiment on the moon (which has no atmosphere), they would hit the ground at the exact same time.