About 0.1 ev is required to break a "hydrogen bond" in a protein molecule. calculate the minimum frequency and maximum wavelength of a photon that can accomplish this. minimum frequency hz maximum wavelength m

Explanation:

The energy of the photon must be equal to 0.1 eV, so let's convert this value into Joules first:

The energy of the photon is related to its frequency by

where h is the Planck constant and f is the frequency. Substituting,

And now we can find the wavelength of the photon, which is given by

where c is the speed of light. Substituting,

whichever one it is, it's definitely not one that you included on the list you provided.

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.