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- Question
Heat energy is transferred by conduction whenever molecules
Options- A. collide each other
- B. means of photons
- C. particles replaces there places
- D. All of the above
- Correct Answer
- collide each other
ExplanationHeat energy can be transferred by three major methods. They are
1. Conduction,
2. Convection and
3. Radiation.
Conduction is the movement of heat through a substance by the collision of molecules
Convection occurs when particles with a lot of heat energy in a liquid or gas move and take the place of particles with less heat energy.
Radiation is the transfer of energy by means of photons in electromagnetic waves governed by the same laws. It occurs through a vacuum or any transparent medium.
- 1. What is a property of most metals?
Options- A. Conductivity
- B. Malleability
- C. Luster
- D. All of the above Discuss
- 2. Sound waves cannot travel through
Options- A. Gas
- B. Liquid
- C. Vacuum
- D. Solid Discuss
- 3. Which statement best describes an igneous intrusion?
Options- A. Igneous intrusion for when ice crystals splash into lava
- B. Magma is injected into surrounding rock forming an igneous intrusive
- C. Magma is exported to an open area and forms iron
- D. Magma explodes to the surface and forms a smooth outer layer of rock Discuss
- 4. The p wave of a normal Electrocardiogram indicates
Options- A. atrial depolarization
- B. Ventricular repolarization
- C. atrial repolarization
- D. Ventricular depolarization Discuss
- 5. Which planet has the lowest density?
Options- A. Earth
- B. Jupiter
- C. Saturn
- D. Neptune Discuss
- 6. Which resource is both renewable and inexpensive?
Options- A. Sunlight
- B. Coal
- C. Gold
- D. Minerals Discuss
- 7. What is another name for energy of motion?
Options- A. Motional energy
- B. Potential energy
- C. Kinetic energy
- D. Rotational energy Discuss
- 8. Materials that allow electricity to flow are called
Options- A. Insulators
- B. Conductors
- C. Electron flows
- D. Stimulators Discuss
- 9. Which of the following is a compound machine?
Options- A. Screw
- B. Knife
- C. Bicycle
- D. Ramp Discuss
- 10. The mass defect is the result of what action occurring?
Options- A. mass being converted to energy when protons and neutrons bind together in a nucleus
- B. protons and electrons being attracted to each other
- C. energy being converted into moles of atoms when neutrons break apart protons
- D. mass being converted to energy when protons and neutrons break apart in a nucleus Discuss
Physics problems
Search Results
Correct Answer: All of the above
Explanation:
We know that most of the metals are goof conductors of electricity and heat. Metals are very strong but they are malleable i.e, they can be bent into a shape. These are shiny when they are cut or polished.
Hence, metals are malleable, conductors and luster. All the above are properties of the metals.
Correct Answer: Vacuum
Explanation:
Sound waves cannot travel through a Vacuum.
A vacuum is an area without any air, like space. So sound cannot travel through space because there is no matter for the vibrations to work in.
Correct Answer: Magma is injected into surrounding rock forming an igneous intrusive
Explanation:
Magma is injected into surrounding rock forming an igneous intrusive.
Actually it is a plutonic formation in which magma present beneath Earth surface deforms the shape of rocks present above it
Correct Answer: atrial depolarization
Explanation:
The P wave in the ECG represents atrial depolarization, which results in atrial contraction, or atrial systole.
The P wave is a summation wave generated by the depolarization front as it transits the atria.
Correct Answer: Saturn
Explanation:
Saturn, the solar system's second largest planet that takes the prize for least dense. It's less dense than water, which has led many people to postulate that it would float.
However, even if it somehow found its way to a body of water large and deep enough to contain it, Saturn would break apart and its rocky core would sink.
Correct Answer: Sunlight
Explanation:
A resource is a source or supply from which a benefit is produced. Resources can be broadly classified upon their availability they are renewable and non renewable resources.
Renewable Resources :: A resource that can be replenished after use are known as Renewable resources.
Examples :: Sunlight, Water, biomass,...
Non renewable Resources :: A resource that, once used, is no longer available are known as Non renewable Resources.
Example :: Coal, fossil fuels, natural gas,...
Sunlight is the both renewable and inexpensive resource from the given options.
Correct Answer: Kinetic energy
Explanation:
Every object has two typea of energies. They are ::
Potential energy
Kinetic energy
If the object is in motion, then it has Kinetic energy (KE). Potential energy (PE) is energy that is "stored" because of the position and/or arrangement of the object.
Hence, another name for energy of motion is called Kinetic energy.
Correct Answer: Conductors
Correct Answer: Bicycle
Explanation:
Bicycle is a compound machine in the above given options. A compound machine is a machine that is formed by two or more simple machines.
Correct Answer: mass being converted to energy when protons and neutrons bind together in a nucleus
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