WorksheetsThermal Energy Transfer in Systems
Total questions: 20
Worksheet time: 19mins
If you place a hot object into cool water, what must happen according to the law of conservation of energy?
The thermal energy of the water and the thermal energy of the metal will remain the same.
The sum of the thermal energy of the water and the thermal energy of the object will increase.
Some of the object's thermal energy is transferred to the water as heat, but a small amount changes to mass.
The thermal energy of the water will increase by the same amount that the thermal of the object decreases.
Sometimes, chefs want to take a pan or pot from the stovetop and put in the oven. Many of these have handles that are damaged by the high temperatures in the oven. Which statement best defines the design problem?
The problem is to design ovens that won't reach high temperatures.
The problem is to design stovetops that won't reach high temperatures.
The problem is to design plastic handles that won't be damaged by high temperatures.
The problem is to design pans that have handles that won't be damaged by high temperatures.
Which of the following is designed to reduce thermal energy flow? Choose all that apply
Mittens
oven mitt
iron frying pan
Polystyrene ice chest
gasoline engine cooling system
Which of the following is designed to allow thermal energy flow? Choose all that apply.
mittens
oven mitt
polystyrene ice chest
iron frying pan
gasoline engine cooling system
Which statement is true about the direction of energy flow for a frying pan?
Thermal energy flows from the stove to the pan to the food.
Thermal energy flows from the pan to the stove.
Thermal energy flows from the stove directly to the food.
Thermal energy flows back and forth from the pan to the stove.
Which statement is true about the direction of energy flow for a glass of ice water?
Thermal energy flows from the room to the glass.
Thermal energy flows from the glass into the room.
Thermal energy flows from the room, into the glass of water, and back out to the room again.
There is no energy flow between the glass of water and the room.
Which is the correct order of the Engineering Design Process?
ask, create improve, plan, imagine
ask, imagine, plan create, improve
create, imagine, ask, plan, improve
plan, create, imagine ask, improve
Which step is not required when solving a design problem?
testing solutions
brainstorming solutions
evaluating and critiquing solutions
alphabetizing or numbering solutions
Which of these energy transfers occurs in a solar panel?
Mechanical energy is transferred to the panel when waves from the sun push against the panel and move it.
Electromagnetic energy is transferred to the panel when light waves from the sun are absorbed by the panel.
Thermal energy is transferred to the panel when it is connected with an electrical source in a complete circuit.
Electrical energy is transferred to the panel when it is connected with an electrical source in a complete circuit.
You want to design a jacket that can be worn in cold and snowy weather. Which set of criteria and constraints is most likely to lead to a successful solution?
minimizes thermal energy transfer and made of a lightweight material
maximizes thermal energy transfer and made of a lightweight material
minimizes thermal energy transfer and made of a material that is not flammable
maximizes thermal energy transfer and made of a material that is not flammable
What property does the material in a device need to maximize thermal energy transfer?
low density
high density
thermal insulator
thermal conductor
A thermos is used to keep liquids, such as soup or water, near a constant temperature for long periods of time. Which statements describes the function of a thermos?
to maximize thermal energy output
to minimize thermal energy transfer
to maximize thermal energy transfer
to minimize the use of environmentally damaging materials
Which is a type of potential energy?
sound energy
motion energy
thermal energy
chemical energy
When a swimmer jumps into a pool and creates a big splash, what is the energy exchange as the swimmer hits the pool water?
Kinetic energy of the swimmer is transformed into potential energy of the pool water.
Kinetic energy of the swimmer is transferred to the pool water.
Potential energy of the swimmer is transferred to the pool water.
Potential energy of the swimmer is transformed into kinetic energy of the pool water.
You have 2 tubs that are filled halfway with water, and their temperatures are measured using the same thermometer and is equal. Bathtub A holds twice the volume as bathtub B. Which bathtub has more thermal energy?
Bathtub A has more thermal energy.
Bathtub B has more thermal energy.
The bathtubs have the same amount of thermal energy.
It would depend on the placement of the thermometer in the bathtub.
Why is the temperature in the city higher than in a rural area?
Sunlight is attracted to taller objects, which makes the city warmer.
There are more people moving around faster there which creates more kinetic energy in the city.
Buildings generate more heat than farmhouses, which makes the surrounding area warmer than the rural area.
There are asphalt streets which trap more heat due to their dark color and composition than grass traps in the rural area.
A measure of an object's average ________ energy is its temperature.
infrared
kinetic
potential
thermal
If more mass of the same type is added to an object, its temperature would ____________.
decrease
increase
stay the same
For a windmill, what type of energy is transferred to the blades to cause them to spin?
grain energy
wind energy
blades
gear and shaft
In a windmill, the grain is crushed into flour using the ______energy of the top wheel, which is moving.
kinetic
elastic
thermal
potential
