SC-1398
Radiation
Lower Sec Science · Secondary 2 · Hard · Radiation
A student compares how quickly three metal blocks lose heat by radiation. All blocks are the same size and material.
- Block X: shiny white surface at "70 "
- Block Y: dull black surface at "70 "
- Block Z: dull black surface at "40 "
Which statement is correct about the thermal energy emitted per second?
- Block X: shiny white surface at "70 "
- Block Y: dull black surface at "70 "
- Block Z: dull black surface at "40 "
Which statement is correct about the thermal energy emitted per second?
- Block X emits less than Y; block Z emits less than Y.
- Block X emits more than Y; block Z emits more than Y.
- Block X emits less than Y; block Z emits more than Y.
- Block X emits more than Y; block Z emits less than Y.
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