Two students are share how to calculate the kinetic and potential energy when the skateboard is halfway down the ramp. In the space below, explain which method is correct and why. Method A “The kinetic energy is half the skater’s original potential energy because they are halfway down the ramp.” Potential energy = mass • acceleration due to gravity • height Kinetic energy (halfway down) = potential energy/2 Method B “The kinetic energy is twice the skater’s original potential energy because they are halfway down the ramp.” Kinetic energy = ½ • velocity/2 Kinetic energy = 2 • (½ • mass • velocity)

1/0.14nm = 10^10/1.4 a lot

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.

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