4. if the wavelength of a wave = 1.5 x 10-8 m. find the frequency and energy of this wave.

Frequency=2.0 × 10^16 Hz

Energy = 1.325 × 10^-17 Joules

The relationship between frequency and wavelength is given by;

c = fλ, where c is the speed of the wave, f is the frequency and λ is the wavelength.

Given;

wavelength,λ = 1.5 x 10^-8 m

speed of the wave = 2.998 × 10^8 m/s

Rearranging the formula we can get the frequency

f = c/λ

Therefore;

f = (2.998 × 10^8 m/s) ÷ (1.5 x 10^-8 m)

 = 1.9987 × 10^16 Hz

 = 2.0 × 10^16 Hz

Thus, the frequency of the wave is  2.0 × 10^16 Hz

To calculate the energy of the wave we use the formula;

E = hf

where, h is the plank's constant, 6.626 × 10^-34 J-s

Therefore;

E = (6.626 × 10^-34 J-s) × (2.0 × 10^16 Hz)

 = 1.325 × 10^-17 Joules

Hence, the energy of the wave is 1.325 × 10^-17 Joules

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them