People use hot air balloons to rise high above the ground and be pushed by air currents from one place to another. The diagram shows a hot air balloon.
A type of chemical reaction, called combustion, takes place between propane and oxygen in the burners.
a. Describe a likely result of this chemical reaction that allows a hot air balloon to rise.
b. Describe a design feature the distance a hot air balloon can travel. Explain your reasoning.
Fueled by propane cylinders, gas jets produce the hot air that fills the envelope (similar to ones you might use on a portable camping stove).
WorkingSince heated air rises, hot air balloons are functional. with the rest. As though it were floating in water, the balloon rises as a result of this. The balloon naturally starts to slowly deflate if the air is allowed to cool.The molecules in the air start to migrate and spread out as the air within the balloon is heated, which results in a decrease in the air's density. The heated air is pushed below the cooler, surrounding air. the warm air is pushed upward as a result of this.For more information on hot air balloon kindly visit to
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Which statement describes convection of thermal energy?
A. a pot sitting on a stovetop burner
B. toaster coils heating a slice of bread
C. sunlight warming the asphalt of a road
D. steam rising from a boiling pot
Answer: its D. (i think)
Explanation:
Convection is single or multiphase fluid flow that occurs spontaneously due to the combined effects of material property
The table shows the masses and speeds of four different carts.
Which cart has the least kinetic energy?
A. cart d
B. cart b
C. cart c
d. cart d
Match the terms and the definitions Lesson 3.04 Question 6 options:
1.
The earth is in a position so that the North Pole is tilted most directly toward the sun.
2.
The tilt and revolution of the earth as it moves around the sun cause
3.
This is the day of the year with the least amount of daylight, which is due to the tilt of the earth's axis.
4.
Days and nights are equal length, and the noon sun is directly overhead.
Equinoxes
Winter Solstice
Summer Solstice
seasons
Answer:
1- Summer Solstice
2- Seasons
3- Winter Solstice
4- Equinoxes
The table shows the same data about how the temperature of each pizza changed over 15 minutes.
Which statement is correct?
A) Thermal energy (heat) was transferred faster out of the pizza on the bottom.
B) Thermal energy (heat) was transferred faster out of the pizza on the top.
C) Thermal energy (heat) was transferred out of both pizzas at the same rate.