In which type of wave do the particles in a medium move parallel to the direction that the wave moves?

a.
ocean waves

b.
surface waves

c.
transverse waves

d.
longitudinal waves

The density of a substance is 4.0 g/cm3. if a sample of the substance has a volume of 25 cm3 then what is the mass

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain