Points and brainliest
assignment: waves math exploration
each problem is worth 2 points.
1. what is the wave speed of a wave that has a frequency of 100 hz and a wavelength of 0.30 m?
2. what is the wave speed of a wave that has a frequency of 50 hz and a wavelength of 0.10 m?
3. what is the frequency of a wave that has a wave speed of 20 m/s and a wavelength of 0.50 m?
4. what is the frequency of a wave that has a wave speed of 80 m/s and a wavelength of 0.20 m?
5. what is the wavelength of a sound wave that has a speed of 340 m/s and a frequency of 440 hz?

All of these problems are solved with the same formula:

Wave Speed = (frequency)x(wavelength) .

For each problem, substitute the two numbers that you KNOW into this formula, and solve it for the missing number.

This explanation is way more useful and helpful to you than a list of the answers.

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.