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1. A quantity of water with a mass of 0.5 kg was heated so that it gained a quantity of heat at a rate of 4200 j per minute. If the specific heat of the water is 4200 j/kg.k, then the time required to raise the temperature of this quantity of water from 25°© to 85°© is equal to ....
   • أ. 3 minutes
   • ب. 6 minutes
   • ج. 1 minute
   • د. 0.5 minutes
2. n insulated aluminum container with a mass of 20 grams containing 150 grams of water at a temperature of 20°©. A metal piece with a mass of 96 grams and a temperature of 100°© was dropped into the water. If the final temperature of the system is 25°© and the specific heat of the water and aluminum are respectively 4200 j/kg.k /900 j/kg.k The specific heat of the metal piece is equal to .... j/kg.k
   • أ. 450
   • ب. 720
   • ج. 960
   • د. 1440
3. If the amount of heat gained by a body doubles, its specific heat will be ....
   • أ. Remains constant
   • ب. Decreases by a quarter
   • ج. Decreases by half
   • د. Increases by double
4. When you put ice cubes in your hand, they flow ...
   • أ. Heat from your hand to the ice
   • ب. Cold from your hand to the ice
   • ج. Cold from the ice to your hand
   • د. Heat from the ice to your hand
5. Which pair of the following physical quantities is measured in the same unit ...
   • أ. Amount of heat and internal energy
   • ب. Internal energy and temperature
   • ج. Specific heat and temperature
   • د. Amount of heat and temperature
6. A body with a mass of 150 grams gained an amount of heat of 8073 J, so its temperature rose from 30°© to 90°© Using the table opposite, what is the material of the body .... Material heat Aluminum 897 Copper 385 Iron 450 Lead 130
   • أ. Aluminum
   • ب. Copper
   • ج. Iron
   • د. Lead
7. A body with a temperature of 220k was changed to -3c, then the average kinetic energy of the body's particles is .....
   • أ. Increases
   • ب. Does not change
   • ج. The answer cannot be determined
   • د. Decreases
8. Which of the following happens to a piece of iron with a temperature of -10°c when placed in an insulated container containing water with a temperature of 10°c .....
   • أ. The speed of iron molecules increases
   • ب. The specific heat of iron decreases
   • ج. The density increases Iron
   • د. The internal energy of the piece of iron decreases
9. The suitable aquatic environment for coral reefs to flourish is ....
   • أ. Warm surface
   • ب. Warm deep
   • ج. Cold deep
   • د. Cold surface
10. The internal energy of a quantity of water with a mass of 1 kg is greater at a temperature of .....
    • أ. 340° K
    • ب. 40° C
    • ج. 300°K
    • د. 4°C
11. The amount of heat required to raise the temperature of 1 kg of a substance by one degree Celsius ……
    • أ. Specific heat of the substance of the body
    • ب. Internal energy of a body
    • ج. Amount of heat
    • د. Temperature
12. A body with a mass of 2 kg and a temperature of 27°C and the specific heat of its substance 2×10³ j/kg.k gained an amount of heat of 10⁴j then the body temperature .....
    • أ. Increases by 2.5 K
    • ب. Increases to 325 K
    • ج. Decreases to 100 K
    • د. Increases to 235 K
13. Which of the following has the mass unit that has the ability to store thermal energy for a longer period immediately after sunset ...
    • أ. Oceans
    • ب. Mountain rocks
    • ج. Coastal sand
    • د. Atmospheric air
14. Which of the following does a high value cause the water temperature not to change at a rapid rate in large bodies of water ....
    • أ. Water specific heat
    • ب. Water salinity
    • ج. Water density
    • د. pH value of water
15. The thermal energy that is transferred from hot bodies to cold bodies is called
    • أ. Amount of heat
    • ب. Internal energy
    • ج. Temperature
    • د. Specific heat
16. Two equal masses of water and oil at the same temperature are placed in two identical containers. If the two containers are placed together on the surface of an electric heater and the temperature of the oil reaches T within a time of t0, then the temperature of the water reaches T within a time of .....
    • أ. Greater than t0
    • ب. Less than t0
    • ج. Equal to t0
    • د. The answer cannot be determined
17. A piece of aluminum with a mass of 0.3 kg changed its temperature from 20°© to 253 K. If the specific heat of aluminum is 897 J/kg.k, then the piece of aluminum has .....
    • أ. Lost an amount of heat of 10764 J
    • ب. Lost an amount of heat of 62700.3 J
    • ج. Gained an amount of heat of 62700.3 J
    • د. Gained an amount of heat of 10764 J
18. The internal energy of a body is equal to ....
    • أ. The sum of the kinetic energy of the body's molecules and their potential energy
    • ب. The difference between the kinetic energy of the body's molecules and their potential energy
    • ج. The average potential energy of the body's molecules
    • د. The average kinetic energy of the body's molecules
19. Two bodies 1, 2 of the same material and their masses m1, m2 respectively, if each of the two bodies gains an amount of heat of Q and the temperature of the two bodies rises by 5°© / 10°© respectively, then the ratio between the masses of the two bodies m1/m2 is equal to ....
    • أ. 2/1
    • ب. 4/1
    • ج. 1/1
    • د. 1/2
20. The opposite table records the values of the specific heat of some materials. The following are the masses of these materials. Which of these masses requires the least amount of thermal energy to change its temperature by 2k? Substance specific heat Copper 385 Iron 450 Aluminum 897 Water 4200
    • أ. 100 grams of aluminum
    • ب. 50 grams of water
    • ج. 200 grams of iron
    • د. 250 grams of copper
21. If you know that the boiling point of ethyl alcohol is 78°© on the Celsius scale, calculate its boiling point on the Kelvin scale
    • أ. 351 K
    • ب. 195 K
    • ج. 531 K
    • د. 135 K
22. Assuming that the specific heat of water is low, what is the effect of this on marine organisms?
    • أ. If the specific heat of water is low, it will lead to rapid fluctuations in temperature, which negatively affects marine organisms and their ability to survive.
    • ب. If the specific heat of water is low, it will lead to rapid fluctuations in density, which negatively affects marine organisms and their ability to survive.
    • ج. If the specific heat of water is low, it will lead to rapid fluctuations in density, which postively affects marine organisms and their ability to survive.
    • د. If the specific heat of water is low, it will lead to rapid fluctuations in temperature, which postively affects marine organisms and their ability to survive.
23. The specific heat of water is a crucial factor in the sustainability of marine life
    • أ. True
    • ب. False
24. Large bodies of water work to moderate the temperature of the surrounding areas
    • أ. True
    • ب. False