Answer:
option (B) is correct.
Explanation:
frequency is directly proportional to the speed of wave and inversely proportional to the wavelength.
For string
frequency , f = v/λ
for tube
frequency ∝ 1 / λ
So, we can say that the frequency is inversely proportional to the wavelength.
thus, the higher the mode means shorter the wavelength.
Answer:
Explanation:
<u>Work
</u>
The work done by an external force F when moving an object by a distance X parallel to its direction is
The second Newton's law gives us the net force acting on an object of mass m which is being moved at an acceleration a:
Replacing the last equation into the first equation
And solving for a
There seems to be some kind of mistake in the data provided, we'll use it anyway
It's a very small value as compared to the dimensions of the rest of the problem.
Answer:
green light have high energy
Explanation:
We have given the wavelength of the red light
Speed of the light
The energy of the signal is given by
The frequency of the green light is given by:
So energy
So green light have high energy
It belongs in the digestive system
Answer:
Explanation:
We are asked to find the cyclist's initial velocity. We are given the acceleration, final velocity, and time, so we will use the following kinematic equation.
The cyclist is acceleration at 1.2 meters per second squared. After 10 seconds, the velocity is 16 meters per second.
- = 16 m/s
- a= 1.2 m/s²
- t= 10 s
Substitute the values into the formula.
Multiply.
We are solving for the initial velocity, so we must isolate the variable . Subtract 12 meters per second from both sides of the equation.
The cyclist's initial velocity is <u>4 meters per second.</u>