A hot air balloon is filled with 1.31 × 106 L of an ideal gas on a cool morning (11 °C). The air is heated to 129 °C. What is the volume of the air in the balloon after it is heated? Assume that none of the gas escapes from the balloon.
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(V1/T1) = (V2/T2)
Remember T must be in kelvin
I have that equation but I don't know how to use it.
You can't assign V1, V2, T1, and T2 or is it some other problem?
I figured it out
A hot air balloon is shown. The canvas balloon is labeled "Envelope". The flame below the opening of the envelope is labeled "Heat". Beneath the flame is a large open container labeled "Basket". A person is inside of the basket.
When the air under the envelope is heated, the balloon lifts. Which of the following statements is true? (1 point)
Hot air balloons use radiation to rise.
Hot air balloons use conduction to rise.
Hot air balloons use convection to rise.
Hot air balloons use air resistance to rise.
2. Darrel conducted an experiment with the following procedure:
Fill two cups with ice water.
Place an uninflated balloon snuggly onto your left index finger.
Blow a little air into an identical balloon, and place it onto your right index finger.
Place both fingers into the cups of ice water.
Darrel noticed that his right finger felt warmer in the ice water than did his left finger. Which of the following does the experiment show?
(1 point)
Air is a good radiator of heat.
Air is a good insulator of heat.
Air is a good conductor of heat.
Air is a good convector of heat.
3. Three metal spoons are on a table. They are each at room temperature. If the three spoons touch, (1 point)
heat will flow among all three spoons.
heat will flow between two spoons.
no heat will flow among the spoons.
heat will flow from the spoons to the air.
4. The Hoover Dam is a hydroelectric power plant that converts the energy of falling water into electricity. Which of the following determines the amount of potential energy of the water stored in the reservoir of the dam? Choose all that apply. (2 points)
the electric potential energy of the water
the weight of the water
the height of the water
the temperature of the water
5. Use the image below to answer the following question.
An image shows a basketball along its path after striking the ground and rebounding twice. The ball bounces at a lower height after the second rebound compared to the first rebound.
Which of the following energy changes occurs as a ball bounces?
(1 point)
potential to chemical
magnetic to kinetic
thermal to mechanical
kinetic to potential
6. Which energy transformation takes place when a firecracker explodes? (1 point)
gravitational potential to mechanical and electromagnetic
nuclear to kinetic and chemical
mechanical to electromagnetic and electrical
chemical to thermal and electromagnetic
7. How can a cyclist minimize friction as he or she rides? (1 point)
by increasing the weight of the bike
by increasing the tread on his or her tires
by decreasing the air resistance
by decreasing aerodynamic design
8. How are temperature and thermal energy related? (1 point)
Temperature and thermal energy both measure the total kinetic energy in an object.
Temperature is one factor that determines the thermal energy of an object.
Thermal energy does not transfer from one object to another.
Two objects with different amounts of thermal energy also have different temperatures.
9. Object A has a higher temperature than Object B. Which statement must be true? (1 point)
Object A is a better insulator than Object B.
Object B is a better conductor than Object A.
Heat will travel from Object A to Object B.
Heat will travel from Object B to Object A.
10. When a positively charged object moves in the same direction as the electric field, the electric potential energy of the object (1 point)
becomes zero.
increases.
decreases.
stays the same.