How can recycling impact the environment?

Select one:
a. It uses less energy to make something from recycled materials than from new materials.
b. It increases the amount of landfill space needed.
c. It uses more natural resources than new materials do.
d. It increases the need for mining, creating jobs.

When doing scientific research ,the sources used should be ?

Acarpenter is driving a 15.0-g steel nail into a board. his 1.00-kg hammer is moving at 8.50 m/s when it strikes the nail. half of the kinetic energy of the hammer is transformed into heat in the nail and does not flow out of the nail. what is the increase in temperature of the nail after the three blows that the carpenter needs to drive the nail in completely? the specific heat of steel is 448 j/kg ∙ k. a) 2.7 k b) 1.8 k c) 7.7 k d) 8.1 k e) 3.6 k

What happens to light when it strikes the inside surface of a smooth, curved mirror?