Me fast

1.) which statement is true about this magnet and nails?

a.) both the magnet and the nails are temporary magnets.

b.) the nails are temporary magnets.

c.) both the magnet and the nails are permanent magnets.

d.) the nails are permanent magnets.

mark as brainiliest !

Which of the statements about waves is true? a. in longitudinal waves, particles move perpendicular to the direction the wave is traveling.b. both transverse and longitudinal waves can travel through water c. electromagnetic waves are a type of longitudinal waves.d. in a transverse wave, particles move parallel to the direction the wave is traveling.

How much work is done lifting a 9.10 kg box straight up onto a shelf that is 1.80 m high?

Automobile fuel efficiency is often measured in miles that the car can be driven per gallon of fuel (mpg). heavier cars tend to have lower fuel efficiencies (lower mpg ratings). which variable (weight or fuel efficiency) is most naturally considered the explanatory (predictor) variable in this context?