Module 4 Assignment Question and
answers already passed 2025
Although protons repel each other because each one has a positive charge,
protons are stable in a nucleus because of... - correct answer ✔neutrons
getting between protons, separating the protons from each other.
the strong force.
A power plant uses a 1,033 Kelvin boiler and a river at 325 Kelvin for cooling.
What is the heat engine efficiency (in percent) of this power plant? Use exact
numbers; do not estimate. - correct answer ✔69
A heat engine operates by... - correct answer ✔using a temperature
difference between two thermal reservoirs.
transferring energy from a hot reservoir to a cold reservoir.
usually having an efficiency less than the maximum efficiency.
The greater the temperature difference between two heat reservoirs... -
correct answer ✔the more work can be done.
The Sun keeps shining... - correct answer ✔by converting hydrogen to
helium.
by E = mc^2.
This question has multiple answers. Choose all that are correct. The hotter an
object... - correct answer ✔the brighter the object.
the bluer the object.
answers already passed 2025
Although protons repel each other because each one has a positive charge,
protons are stable in a nucleus because of... - correct answer ✔neutrons
getting between protons, separating the protons from each other.
the strong force.
A power plant uses a 1,033 Kelvin boiler and a river at 325 Kelvin for cooling.
What is the heat engine efficiency (in percent) of this power plant? Use exact
numbers; do not estimate. - correct answer ✔69
A heat engine operates by... - correct answer ✔using a temperature
difference between two thermal reservoirs.
transferring energy from a hot reservoir to a cold reservoir.
usually having an efficiency less than the maximum efficiency.
The greater the temperature difference between two heat reservoirs... -
correct answer ✔the more work can be done.
The Sun keeps shining... - correct answer ✔by converting hydrogen to
helium.
by E = mc^2.
This question has multiple answers. Choose all that are correct. The hotter an
object... - correct answer ✔the brighter the object.
the bluer the object.
