Wavelength of red light = 650 nm
Here the unit is nanometer, nano means 10⁻⁹
And wavelength of water = 2m
1 nanometer = 10⁹ meter
So, 2 meter = 2 x 10⁹ nm and 650nm = 6.5 x 10⁻⁷ m
now you can see the difference how much wavelength of water is bigger than wavelength of red light.
if we find the difference between them
650 nm= .00000065 m
2m - .00000065m = 1.99999935
so, the water wave is ~1.99999935 meters larger than the red light wave
Answer:
A. Chemical weathering
Explanation:
The major process responsible for the formation of the cave is called chemical weathering.
So what is weathering and what are the types?
- Weathering is the physical disintegration and chemical decomposition of rocks to form sediments and soils.
- Physical weathering is the mechanical breakdown of rocks.
- Chemical weathering is the decomposition of rocks through chemical action.
Limestone is made up of calcium carbonate. It reacts with weak carbonic acid to form a solution which carves out a cave in the rock body.
Answer:
Work, W = 846.72 Joules
Explanation:
Given that,
Mass of the watermelon, m = 4.8 kg
It is dropped from rest from the roof of 18 m building. We need to find the work done by the gravity on the watermelon from the roof to the ground. It is same as gravitational potential energy i.e.
W = mgh
W = 846.72 Joules
So, the work done by the gravity on the watermelon is 846.72 Joules. Hence, this is the required solution.
Answer:
Pi(3.14) radians or 180º degrees
Explanation:
First of all, we need to obtain the wavelength of a wave traveling to the speed of sound and 420 Hz of frequency.
The formula is:
where l = wavelength in meters
With current values:
l = 336 [m/s]/420[1/s] = 0.8 meters
Since a complete cycle (360º or 2pi radians) needs 0.8 meters to complete, 0.4 meters or 40 cm is just half of it, making a 180º degree phase or 3.14 radians.