As the train blows its whistle towards you, the wavelength is shorter than the sound of the whistle at rest.
<h3>What is wavelength?</h3>
Wavelength is the distance traveled by a wave in a given period of time.
Relationship between wavelength, speed and frequency of sound
v = fλ
where;
- v is the speed of the sound
- f is the frequency of the sound
- λ is the wavelength of the sound
As the frequency of the sound increases, the wavelength of the sound decreases.
Thus, as the train blows its whistle towards you, the wavelength is shorter than the sound of the whistle at rest.
Learn more about wavelength here: brainly.com/question/10728818
Answer:
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"a virus infection"
Explanation:
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Answer:
The magnetic field is 1.23 T in upward.
Explanation:
Given that,
Mass = 0.2
Length = 0.8 m
Current = 2 A
We need to calculate the magnetic field
If the net force on the rod is zero so the magnetic field is equal to the weight.
Using formula of magnetic force
Put the value into the formula
For direction, using right hand rule
In right hand rule, Thumb represents the force, forefinger represents the magnetic field and the middle finger represents the current.
So,
The direction of the magnetic field is upward.
Hence, The magnetic field is 1.23 T in upward.
Answer:
the mass of the cart is held constant.
Explanation:
This can be solved by referring to the Newton's Second Law of Motion. Newton's Second Law of motion states that whenever an unbalanced force is applied to a body, it produces an acceleration in the body, in the direction of force. Thus, both the force and the acceleration are directly proportional to each other. And the mass is kept constant during this process. As the formula derived by Newton's Second Law suggests that:
F = ma
It is clear from this equation that if the force and acceleration are variables, then the mass must be a constant.
<u>Hence, the mass of the cart is held constant.</u>
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Explanation:
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