Frequency and wavelength of a wave are: A.)not related
B.)inversly related
C.)directly related
D.)depend on waves velocity

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

answera compound;

according to jean piaget, in what stage of cognitive development are children able to understand conservation task?

b. preoperational

just took it

80cm/s.

24cm/s.

53.3cm/s.