1. Which of the following prevents sound to travel through empty space or vacuum?
A. gravity
B. heat transfer
C. lack of medium to transmit the vibration
D. sound waves
2. Heat transfers _________.
A. depend on the temperature of the object.
B. from a colder object to warmer one.
C. from a warmer object to a colder one.
D. if there is electrical energy
3. Which of the following materials will give heat?
A. burning firewood C. melted ice
B. guitar string D. snow
4. An egg will be cooked in boiling water because heat transfers in __________.
A. gas C. solids
B. liquids D. waves
5. It is a form of energy that can be seen by the naked eye and travels faster than sound waves.
A. sound C. mechanical
B. heat D. light
Answers
Answer:
1. C (sound can't travel without medium)
2. C ( heat always transfers from a hot body to a cold body(when there is temperature difference),and thus stop tranferring at the moment when the temperature of both the bodies become same)
3. A (burning is a combustion process,thus releases heat)
4. B (the heat transfers from the boiling water to egg)
5. D ( light energy has the highest velocity,hence travels faster than anything else)
Hope you are satisfied with these answers...
✧Question:-
1. Which of the following prevents sound to travel through empty space or vacuum?
A. gravity
B. heat transfer
C. lack of medium to transmit the vibration
D. sound waves
2. Heat transfers _________.
A. depend on the temperature of the object.
B. from a colder object to warmer one.
C. from a warmer object to a colder one.
D. if there is electrical energy
3. Which of the following materials will give heat?
A. burning firewood
B. guitar string
C. melted ice
D. snow
4. An egg will be cooked in boiling water because heat transfers in __________.
A. gas
B. liquids
C. solids
D. waves
5. It is a form of energy that can be seen by the naked eye and travels faster than sound waves.
A. sound
B. heat
C. mechanical
D. light
✧Answer:-
1. Which of the following prevents sound to travel through empty space or vacuum?
A. gravity
B. heat transfer
C. lack of medium to transmit the vibration
D. sound waves
option c, lack of medium to transmit the vibration
space is a vacuume- there are no particles of matter like atoms like atoms or molecules, to help produce sound and sound needs a medium to travel.
2. Heat transfers _________.
A. depend on the temperature of the object.
B. from a colder object to warmer one.
C. from a warmer object to a colder one.
D. if there is electrical energy
option c, from a warmer object to a colder one.
as heat always flows from an object of an higher temperature to an lower temperature. this is how we can say weather an object is hot or cold, by touching it.
3. Which of the following materials will give heat?
A. burning firewood
B. guitar string
C. melted ice
D. snow
option a, burning firewood
it is obvious that burning firewood will give heat, as when fire burns it gives heat and light energy. so we feel the warmth.
4. An egg will be cooked in boiling water because heat transfers in __________.
A. gas
B. liquid
C. solids
D. waves
option b, liquids
water is an liquid, boiling water is also a liquid. so egg can be cooked in boiling water, in which heat transfers in liquids.
5. It is a form of energy that can be seen by the naked eye and travels faster than sound waves.
A. sound
B. heat
C. mechanical
D. light
option d, light
option d, lightbecause we can see due to light, we can see light, not sound, heat and mechanical energy.