With 1-4. urgent need on physics questions. 100% correct answers

1).  Speed of any wave = (wavelength) x (frequency) .  I got 4.5 m/s in my head, but you need to check this.

2).  and  3).  are marked correctly

4).  Transverse waves have crests and troughs.  But sound waves are longitudinal waves, so they don't have any.  The wavelength of a sound wave is the distance between consecutive centers of compression (or rarefaction).

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.