Trivia Trivia Trivia!!! 8)

Trivia Trivia Trivia!!! 8)

Posted: Sat Aug 30, 2008 7:51 am

I know many smart people goes at this site so here are some questions to be answered. No making jokes about the your answer.

1. Why do all freely falling objects have the same acceleration?




2. If you stepped into a hole bored completely through Earth and made no attempt to grab the edges at either end, what kind of motion would you experience?



3. Halfway to the center of the Earth, would gravity pull on you more strongly or less strongly than at the surface of Earth?



4. We know that the moon and the sun produce our ocean tides. And we know the moon plays the greater role because it is closer. Does it closeness mean it pulls with more gravitational force than the sun on Earth’s oceans?



5. Our sun is not massive enough to become a black hole. But if it were, and if it collapsed from its present size to become a black hole, would Earth be drawn into it?



6. There are usually alternate explanations for things. Is the following explanation valid? Satellites remain in orbit instead of falling to Earth because they are beyond the main pull of Earth’s gravity.



7. Satellites in close circular orbit fall about 5 m during each second of orbit. How can this be if the satellite does not get closer to Earth?



8. Does time dilation mean that time really passes more slowly in moving systems or that it only seems to pass more slowly?


9. If you were moving in a spaceship at a high speed relative to Earth, would you notice a difference in you pulse rate? In the pulse rate of the people back on Earth?



10. Will observers A and B agree on measurements of time if A moves at half the speed of light relative to B? If both A and B move together at 0.5c relative to Earth?



11. Here’s a simple arithmetic question: If a spaceship travels foe one hour and emits a flash every 6 min, how many flashes will be emitted?



12. A spaceship sends equally spaced flashes while approaching a receiver at constant speed. Will the flashes equally spaced when they encounter the receiver?



13. World population grows each year. Does this mean the mass of Earth increased each year?



14. Does you brain contain atoms that were once part of Albert Einstein?



15. Which has the greater density- 1 kg of water or 10 kg of water?



16. Which has the greater density- 5 kg of lead or 10 kg of aluminum?



17. Which has the greater density- 1 g of uranium or the planet Earth?




18. The density of Earth is 19.3 g/cm3. What is its specific gravity?



19. If a force of 10 N stretches a certain spring 4 cm, how much stretch will occur for an applied force of 15 N?



20. If an athlete were somehow scaled up proportionally to twice size, would he be stronger or weaker?



21. Is there more pressure at the bottom of a bathtub of water 30 cm deep or at the bottom of a pitcher of water 35 cm?



22. A brick mason wishes to mark the back of a building at the exact height of bricks already laid at the front of the building. How can he measure the same height using only a garden hose and water?



23. A stone is thrown into a deep lake. As it sinks deeper and deeper into the water, does the buoyant force on it increase, decrease, or remain unchanged?



24. We know that a fish makes itself more dense, it will sink; if it makes itself less dense, it will rise. In terms of buoyant force, why is this so?



25. The volume of a submerged object is equal to the _________ of liquid displaced.



26. The weight of a floating object is equal to the __________ of liquid.



27. About how many kilograms of air occupy a classroom that has a 200-square meter floor area and a 4-m-high ceiling.




28. Why doesn’t the pressure of the atmosphere break windows?



29. If you squeeze a balloon to one-third its volume, by how much will the pressure inside increase?



30. Is there a buoyant force acting on you? If there is, why are you not buoyed up by this force?

31. Two balloons are inflated to the same size, one with air one with helium. Which balloon experiences the greater buoyant force. Why dose the air-filled balloon sink and the helium-filled balloon float?



32. Which has a greater specific heat capacity- water or sand?



33. Suppose you use a flame to add a certain quantity of heat to 1 liter of water, and the water temperature rises by 2 degrees Celsius. If you add the same quantity of heat to 2 liters of water, by how much will its temperature rise?



34. Why is it advisable to allow telephone lines to sag when stringing them between poles in summer?



35. If you hold apiece of metal bar against a piece of ice, the end in your hand will soon become cold. Does this cold flow from the ice to your hand?


36. Wood is a better insulator than glass. Yet fiberglass is commonly used to insulate wooden buildings. Why?



37. You can stick your hand into a hot pizza oven for several seconds without harm, whereas you’d never the metal inside surfaces fro even a second. Why?





38. You can hold your fingers beside the candle flame without harm but not above the flame. Why?




39. If a god absorber of radiant energy were a poor emitter, how would its temperature compare with its surroundings?



40. Is it more efficient to paint a heating radiator black or silver?



41. Since a hot cup of tea loses heat more rapidly than lukewarm cup of tea. Would it be correct to say that a hot cup of tea will cool to room temperature before a lukewarm cup of tea will?



42. Would evaporation be a cooling process if each molecule at the surface of a liquid had the same kinetic energy before and after bumping into other molecules?



43. Since boiling is a cooling process, would it be a great idea to cool your hot and sticky hands by dipping them into boiling water?



44. How much energy is released when a gram of steam at 100 degrees Celsius condenses to water at 100 degrees Celsius?



45. When water in the vapor phase condenses, is the surrounding air warmed or cooled?



46. Which is larger, a Celsius degree or a Kelvin?




47. A chunk of iron has a temperature of 0 degrees Celsius. If a second, identical chunk of iron is twice as hot ( has twice the absolute temperature), what is the temperature in degrees Celsius?



48. If 10 J of energy is added to a system that does no external work, by how much will the internal energy of that system be raised?



49. If 10 J of energy is added to a system that does 4 J of external work, by how much will the internal energy of that system be raised?



50. What is the frequency in vibrations per second of a 100-Hz wave?

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Posted: Sat Aug 30, 2008 2:07 pm

Don't answer any of this. I think this is for school work.
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Posted: Sat Aug 30, 2008 2:27 pm

Oho, how can you ask us to do your homework for you? You can't give us your marks in return.
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Posted: Sun Aug 31, 2008 8:15 am

I have just looked at some questions and trying to answer them. They are only guesses so don't blame me for any outcome of the answers.
34. In winter it will give room to constrict i think.
38. hot air rises so the heat is up not sideways maybe.
cbf giving my opinion of anymore >.>
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Posted: Sun Aug 31, 2008 9:00 am

Why do all freely falling objects have the same acceleration?
A. because weight and size doesn’t affect acceleration..i believe that it was tested by a famous scientist on leaning tower of Pisa..I don’t know if he’s Galileo or other guy




2. If you stepped into a hole bored completely through Earth and made no attempt to grab the edges at either end, what kind of motion would you experience?
A. Falling motion


3. Halfway to the center of the Earth, would gravity pull on you more strongly or less strongly than at the surface of Earth?
A. Maybe stronger because earth gravitational pull is weaker if the object is farther from earth just like the satellites that orbits the earth


4. We know that the moon and the sun produce our ocean tides. And we know the moon plays the greater role because it is closer. Does it closeness mean it pulls with more gravitational force than the sun on Earth’s oceans?
A. Yes


5. Our sun is not massive enough to become a black hole. But if it were, and if it collapsed from its present size to become a black hole, would Earth be drawn into it?
A. No because by that time I believe that Earth would have been obliterated before the sun becomes a blackhole since that will take a very long time..but if earth will still exist at that time the answer is yes


6. There are usually alternate explanations for things. Is the following explanation valid? Satellites remain in orbit instead of falling to Earth because they are beyond the main pull of Earth’s gravity.
A. Maybe…



7. Satellites in close circular orbit fall about 5 m during each second of orbit. How can this be if the satellite does not get closer to Earth?
A. because the orbit of satellites are fixed..


8. Does time dilation mean that time really passes more slowly in moving systems or that it only seems to pass more slowly?
A. IIRC the answer is yes..time passes more slowly in moving sysrems..in fact if your travelling at near the speed of light, 1 hour on Earth would be like 30 yours on your journey.. I got this after reading a book that discuss Einstein’s work.



11. Here’s a simple arithmetic question: If a spaceship travels foe one hour and emits a flash every 6 min, how many flashes will be emitted?
A. ten flashes



12. A spaceship sends equally spaced flashes while approaching a receiver at constant speed. Will the flashes equally spaced when they encounter the receiver?
A. Yes


13. World population grows each year. Does this mean the mass of Earth increased each year?
A. maybe yes



15. Which has the greater density- 1 kg of water or 10 kg of water?
A. they are equally dense





17. Which has the greater density- 1 g of uranium or the planet Earth?
A. uranium





35. If you hold apiece of metal bar against a piece of ice, the end in your hand will soon become cold. Does this cold flow from the ice to your hand?
A. the cold flow from the ice to the metal bar to your hand


36. Wood is a better insulator than glass. Yet fiberglass is commonly used to insulate wooden buildings. Why?
A. because wood is flammable?


37. You can stick your hand into a hot pizza oven for several seconds without harm, whereas you’d never the metal inside surfaces fro even a second. Why?
A. because metals are the best conductors of heat




41. Since a hot cup of tea loses heat more rapidly than lukewarm cup of tea. Would it be correct to say that a hot cup of tea will cool to room temperature before a lukewarm cup of tea will?
A. NO





i tried to answer most of it...but i just can't..i'm just 14 yrs old.what can you expect? haha..is this your homework?
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Posted: Sun Aug 31, 2008 9:55 am

Trivia, or schoolwork?

I obey the mods. I shall not answer.
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Posted: Sun Aug 31, 2008 11:33 am

@rambol
ur such an obedient guy..^^
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Posted: Sun Aug 31, 2008 12:30 pm

1. Why do all freely falling objects have the same acceleration?

free fall neglect air resistance and weight


2. If you stepped into a hole bored completely through Earth and made no attempt to grab the edges at either end, what kind of motion would you experience?

free fall


3. Halfway to the center of the Earth, would gravity pull on you more strongly or less strongly than at the surface of Earth?

stronger, because the distance is shorter (applying the LUG)

4. We know that the moon and the sun produce our ocean tides. And we know the moon plays the greater role because it is closer. Does it closeness mean it pulls with more gravitational force than the sun on Earth’s oceans?

depending on the area of the moon

5. Our sun is not massive enough to become a black hole. But if it were, and if it collapsed from its present size to become a black hole, would Earth be drawn into it?

yes, even light can escape a black hole

6. There are usually alternate explanations for things. Is the following explanation valid? Satellites remain in orbit instead of falling to Earth because they are beyond the main pull of Earth’s gravity.

if they are beyond the pull, then the satellites will not revolve but instead float in space

7. Satellites in close circular orbit fall about 5 m during each second of orbit. How can this be if the satellite does not get closer to Earth?

dunno

8. Does time dilation mean that time really passes more slowly in moving systems or that it only seems to pass more slowly?

dunno
9. If you were moving in a spaceship at a high speed relative to Earth, would you notice a difference in you pulse rate? In the pulse rate of the people back on Earth?



10. Will observers A and B agree on measurements of time if A moves at half the speed of light relative to B? If both A and B move together at 0.5c relative to Earth?



11. Here’s a simple arithmetic question: If a spaceship travels foe one hour and emits a flash every 6 min, how many flashes will be emitted?

10... duh?

12. A spaceship sends equally spaced flashes while approaching a receiver at constant speed. Will the flashes equally spaced when they encounter the receiver?

yes, they will be compressed, using the Doppler effect


13. World population grows each year. Does this mean the mass of Earth increased each year?

not really, the mass of the population is negligible compared to the earth's mass

14. Does you brain contain atoms that were once part of Albert Einstein?
no, but the air you breathe contains the air einstein breathed


15. Which has the greater density- 1 kg of water or 10 kg of water?

they have the same density

16. Which has the greater density- 5 kg of lead or 10 kg of aluminum?

lead

17. Which has the greater density- 1 g of uranium or the planet Earth?


depends

18. The density of Earth is 19.3 g/cm3. What is its specific gravity?

dunno

19. If a force of 10 N stretches a certain spring 4 cm, how much stretch will occur for an applied force of 15 N?

6 cm

20. If an athlete were somehow scaled up proportionally to twice size, would he be stronger or weaker?

dunno

21. Is there more pressure at the bottom of a bathtub of water 30 cm deep or at the bottom of a pitcher of water 35 cm?

pitcher

22. A brick mason wishes to mark the back of a building at the exact height of bricks already laid at the front of the building. How can he measure the same height using only a garden hose and water?

dunno


23. A stone is thrown into a deep lake. As it sinks deeper and deeper into the water, does the buoyant force on it increase, decrease, or remain unchanged?



24. We know that a fish makes itself more dense, it will sink; if it makes itself less dense, it will rise. In terms of buoyant force, why is this so?



25. The volume of a submerged object is equal to the _________ of liquid displaced.

volume


26. The weight of a floating object is equal to the __________ of liquid.



27. About how many kilograms of air occupy a classroom that has a 200-square meter floor area and a 4-m-high ceiling.




28. Why doesn’t the pressure of the atmosphere break windows?

because the pressure inside is equal to the pressure outside

29. If you squeeze a balloon to one-third its volume, by how much will the pressure inside increase?

3 times

30. Is there a buoyant force acting on you? If there is, why are you not buoyed up by this force?

31. Two balloons are inflated to the same size, one with air one with helium. Which balloon experiences the greater buoyant force. Why dose the air-filled balloon sink and the helium-filled balloon float?



32. Which has a greater specific heat capacity- water or sand?

water has the greatest specific heat

33. Suppose you use a flame to add a certain quantity of heat to 1 liter of water, and the water temperature rises by 2 degrees Celsius. If you add the same quantity of heat to 2 liters of water, by how much will its temperature rise?

1 degree celsius

34. Why is it advisable to allow telephone lines to sag when stringing them between poles in summer?



35. If you hold apiece of metal bar against a piece of ice, the end in your hand will soon become cold. Does this cold flow from the ice to your hand?

no, it's heat flow from hand to ice
36. Wood is a better insulator than glass. Yet fiberglass is commonly used to insulate wooden buildings. Why?

fiber glass is plastic I guess

37. You can stick your hand into a hot pizza oven for several seconds without harm, whereas you’d never the metal inside surfaces fro even a second. Why?

metals are good heat conductors



38. You can hold your fingers beside the candle flame without harm but not above the flame. Why?

most heat goes upward


39. If a god absorber of radiant energy were a poor emitter, how would its temperature compare with its surroundings?

hotter

40. Is it more efficient to paint a heating radiator black or silver?

silver, to reflect heat, black would absorb heat

41. Since a hot cup of tea loses heat more rapidly than lukewarm cup of tea. Would it be correct to say that a hot cup of tea will cool to room temperature before a lukewarm cup of tea will?

no

42. Would evaporation be a cooling process if each molecule at the surface of a liquid had the same kinetic energy before and after bumping into other molecules?

yes

43. Since boiling is a cooling process, would it be a great idea to cool your hot and sticky hands by dipping them into boiling water?

no, do that if your hand is hotter than the boiling water

44. How much energy is released when a gram of steam at 100 degrees Celsius condenses to water at 100 degrees Celsius?



45. When water in the vapor phase condenses, is the surrounding air warmed or cooled?

warmed

46. Which is larger, a Celsius degree or a Kelvin?


celsius

47. A chunk of iron has a temperature of 0 degrees Celsius. If a second, identical chunk of iron is twice as hot ( has twice the absolute temperature), what is the temperature in degrees Celsius?
0 degree celsius = 273 degrees kelvin
273 x 2 = 546 degree kelvin, 546 - 273 = 273 celsius
273 degrees celsius

48. If 10 J of energy is added to a system that does no external work, by how much will the internal energy of that system be raised?



49. If 10 J of energy is added to a system that does 4 J of external work, by how much will the internal energy of that system be raised?



50. What is the frequency in vibrations per second of a 100-Hz wave?

100
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Posted: Sun Aug 31, 2008 1:07 pm



Better you ask me questions than answer such a long list of questions.

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Posted: Sun Aug 31, 2008 1:33 pm

*chuckles at some answers*
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Posted: Sun Aug 31, 2008 6:13 pm

sorry! I didn't know it wasn't allowed here. Me finished anyway; just seeking opinions cuz i think my teacher only wants to get our opinions on these questions. cheese sticks ang hirap!

OT: pano nga pala ung shields under the pix?

tnx for your reps

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