Choose all the answers that apply.
The sun _____.
a. creates energy from fission reactions
b. creates energy through fusion reactions
c. transfers heat through radiation
d. is made of hydrogen and helium
e. uses its own mass to create energy
Help asap plz! Actual answers plz!
Describe an example of an action and reaction. Identify the forces and their directions.
Answer:
An example of action is there is a fire and reaction is you running
Explanation:
If all three metals were exposed to extremely high temperatures, which would be the last to melt? (copper, gold, mercury)
Answer:
mercury
Explanation:
From these three metals, mercury would melt the fastest. Its kinda like water, it changes states quickly unlike gold and copper
A student used a portable electric drill to remove screws from a broken wooden table. He noticed that the screws holding the table together were warm to the touch after being removed from the wood. Which statement best explains this phenomenon?
A:Electrical energy from the drill was converted into chemical energy due to conductivity.
B:The process of removing the screw concentrated the thermal energy that was already present in the wood
Answer:
A.
Electricity can travel through metal, such as the screws, creating a conductor.
What is the largest contributor to the greenhouse effect?
Answer:
burning of fossil fuels
Explanation: