Heat and Transfer

Temperature equal to 30 ° C

• 25° R

• 24° R

• 30° R

• 35° R

• 40° R

The tool used to measure temperature is

• sense of hand

• tongue

• thermometer

• barometer

• hydrometer

Two bars of K and L are of the same type. At a temperature of 20°C, the lengths are 4 m and 6 m, respectively. When heated to a temperature of 50°C, it turns out that the K stem length to 4.15 m. If iron L is heated to 60°C, then the length becomes...

• 6,10

• 6,20

• 6,25

• 6,30

• 6,45

A child has a body surface area of ​​14,000 cm² and its emissivity 0.85. The child's skin temperature is 37 ° C. If standing in a room temperature of 20 ° C, then the amount of heat lost from that person per

minutes is ....

• 1,00 kkal

• 1,80 kkal

• 2,30 kkal

• 2,80 kkal

• 4,30 kkal

If 75 g of water at 0 ° C are mixed with 50 g of water that is temperature 100 ° C, then the final temperature of the mixture of the two waters is...

• 25° C

• 40° C

• 60° C

• 65° C

• 75° C

Two similar black bodies are at 327 ° C and 27 ° C, espectively. If these two objects emit energy in the form of radiation then the ratio of the amount of energy emitted per second is ....

• 1 : 4

• 4 : 1

• 1 : 16

• 16 : 1

• 8 : 3

The transfer of energy by the sun's rays is called...

• conduction

• radiation

• isolation

• convection

• indirect

If a substance has a high specific heat, then that substance...

• temperature rises slowly when heated

• quickly rises in temperature when heated

• slow to boil

• quickly boil

• melts fast

The amount of heat emitted by an object whose temperature is greater than 0 K, is directly proportional to...

• the temperature

• to the rank of two of the temperature

• ambient temperature

• the object's mass

• The surface area of ​​the object

Heat required for raise the temperature of the dependent object on ...

• mass of object, initial temperature, temperature end

• mass of object and object type

• types of objects and temperature rise

• mass of object, object type and temperature rise

• The temperature rise and long warming up