Physics, 09.12.2020 18:00 boportsmouth7908

Un pedazo de hielo el hielo s a -10°C se encuentra en un recipiente cerrado de material aislante sin aire y se enciende un bombillo adentro del recipiente a cierta distancia del hielo, se puede afirmar que la temperatura del hielo (A) aumenta, porque se transfiere calor por radiación (B) aumenta, porque se transfiere calor por convección (C) aumenta, porque se transfiere calor por conducción(contacto) (D) no cambia, porque no hay contacto entre el bombillo y el hielo.

Answers: 1

Show answers

Another question on Physics

Physics, 21.06.2019 16:00

As shown in fig. p3.64, a closed, rigid tank fitted with a fine-wire electric resistor is filled with refrigerant 22, initially at 2108c, a quality of 80%, and a volume of 0.01 m3. a 12-volt battery provides a 5-amp current to the resistor for 5 minutes. if the final temperature of the refrigerant is 408c, determine the heat transfer, in kj, from the refrigerant.

Answers: 1

Answer

Physics, 21.06.2019 17:20

Your 249 ml cup of coffee is too hot to drink when served at 82 degree celsius. what is the mass of an ice cube taken from a -21 degree celsius freezer, that will cool your coffee to a pleasant 54 degree celsius. specific heat of the water is 4190 j/kg c, specific heat of ice is 2090 j/kg c, heat of fusion of ice is 3.33 x 10^5 j/kg

Answers: 3

Answer

Physics, 22.06.2019 19:00

The friction of the water on a boat produces an acceleration of -10. m/s2. if the boat is traveling at 30. m/s and the motor is shut off, how long it take the boat to slow down to 5.0 m/s?

Answers: 1

Answer

Physics, 22.06.2019 19:40

Currents in dc transmission lines can be 100 a or higher. some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers. for a line that has current 150 a and a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? express your answer in teslas and as a percentage of the earth’s magnetic field, which is 0.50 g. is this value cause for worry?

Answers: 1

Answer

You know the right answer?

Un pedazo de hielo el hielo s a -10°C se encuentra en un recipiente cerrado de material aislante sin...

Questions