Explanation:
Convection currents are when hot air rises because of its density to be replaced by the cold, denser air that is falling down from the atmosphere. This cyclical pattern gives rise to distinct weather patterns.
14)
What is the main method of heat transfer from the core to the crust of Earth?
Explanation:_The_amount_of_heat_that_needs_to_be_added_is_15,200_calories.'>Explanation:_The_amount_of_heat_required_is_2000_calories'>Explanation:_The_amount_is_110_cal'>Explanation:_Convection'>Explanation:
Convection currents raise the less dense hot material from the center to the cool crust and material from the cool (dense) crust settles down to the core to be heated again.
15) The specific heat of iron is 0.11
. A cafeteria fork made of iron has a mass of 20 grams. How much heat energy is needed to raise the temperature of this fork from 25°C to 75°C?
Explanation:
The amount is 110 cal. To calculate, multiply the specific heat of the substance (.11) by the mass (20 g) by the number of degrees you want it to increase (50°C). The product is 110 calories.
16) Raising 100 grams of water from 40 to 60 °C (the specific heat capacity of water is 1
) requires the addition of
Explanation:
The amount of heat required is 2000 calories. Specific heat x mass x change in temp. (1)x(100)x(20) = 2000 calories
17)
If 200 grams of water is to be heated from 24.0° C to 100.0° C to make a cup of tea, how much heat must be added?
Explanation:
The amount of heat that needs to be added is 15,200 calories. The equation is
heat = (1)(200)(76) which is 15200 calories.
18) When ironing clothes, the primary method of heat transfer is
Explanation:
conduction is when heat is transferred directly from one solid to another through the collision of molecules.
19)
Consider the heating curve of a substance. At what location does melting occur?
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