An ice cube has a temperature of -15.0°C The total thermal energy needed to raise the temperature of this ice cube to 0.0°C
and completely melt the ice cube is 5848 J
specific heat capacity of ice = 2100 J/kg ^*C
specific latent heat of fusion of ice = 334 000 J/kg

Calculate the mass of the ice cube.
(5 marks)

scientific laws are the result of testing theories and proving them to be facts.

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

you'd use the equation that establishes a relationship between  energy  and  wavelength, which looks like this

e=h⋅cλ, where

λ  - the wavelength of the photon; c  - the speed of light, usually given as  3⋅108m/s; h  -  planck's constant, equal to  6.626⋅10−34j s

plug the value you were given for the energy of the photon in the above equation to get the wavelength

e=h⋅cλ⇒λ=h⋅ce

λ=6.626⋅10−34js⋅3⋅108ms−1.257⋅10−24j=1.581⋅10−1m