The velocity of the source is positive if the source is ______________. Note that this equation may not use the sign convention you are accustomed to. Think about the physical situation before answering.a. traveling in the +x direction
b. traveling toward the listener
c. traveling away from the listener
Answers
Answer: Answer is "B"
Explanation:
A physical situation of this question can be conceived as follows: If a siren is blowing through a certain distance in motion, then the listener find out that the velocity of the sound wave increases as the source of the siren is approaching the listener. The listener hear the maximum sound frequency and velocity of the source as it reaches him. However, the source velocity decreases as the siten moves away from the listener which can be said to be negative. Therefore, the correct answer is that the velocity increases as the source is moving towards the listener which is option "B"
Final answer:
In Physics, a positive velocity of a source usually indicates that the source is moving towards the observer or listener. This is based on the principles of the Doppler effect. The sign convention can change depending on the reference system
Explanation:
In the realm of Physics, particularly in the study of waves and sound, when we say that the velocity of the source is positive, it generally means that the source is traveling towards the listener. This is in line with the convention in Doppler effect, a phenomenon observed whenever the source of waves is moving with respect to the observer. Given this, the correct answer to your question would be (b) traveling toward the listener.
However, be mindful that the sign convention may vary depending on the context or the reference system being used. Still, the major principle remains: the perceived frequency is higher if the source is moving towards the observer, associated with a positive velocity; and lower if it's moving away, associated with a negative velocity.
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Related Questions
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According to the law of conservation of energy, the total amount of energy in the universe?A. changes constantly B. remains constant C. increases D. decreases
A bicycle rider travels 50.0 km in 2.5 hours. What is the cyclists speed
Heliocentric means… sun-centered. moon-centered. Earth-centered. galaxy-centered.
What will that action cause her body to do? Why?
Which of Newton’s Laws applies to this situation?
Write a paragraph which incorporates all of the above information.
Answers
Answer:
In order to get back to the ship, the astronaut must throw the belt in the opposite direction the spaceship.
From Newton's third law of motion:
For every action, there is equal and opposite reaction.
In order to throw the belt away, astronaut would apply some force which cause same amount of force acting on her body in the opposite direction which would take her towards the spaceship.
Answers
Answers
Answer:
The centripetal acceleration that the moon experiences will be almost equal to the gravitational force that the Earth does in the moon,
Now, remember these two things:
F = m*a
and Fg = G*M1*M2/r^2
the first equation says that the force applied to something is equal to the mass of the object times the acceleration.
The second equation is for the gravitational force, where G is a constant, M1 and M2 are the masses of both objects, in this case, the Earth and the moon, and r is the distance.
We know that the acceleration in the surface of the Earth is:
a = Fg/M2 = g = G*M1/(RE)^2
now, for the moon we will have:
a = G*M1/(60RE)^2 = (G*M1/(RE)^2) *(1/60^2)
Here the term in the left is equal to g, so we have:
(G*M1/(RE)^2) *(1/60^2) = g*(1/60^2)
So the centripetal acceleration of the moon is 60^2 = 3600 times smaller than g.
Answers
I say oil...................
Answers
The kinetic energy of the object with a mass of 2kg has a linear momentum of 6kgm/s is 9 joules.
What is kinetic energy?
Kinetic energy is the energy obtained when the body is in motion. It is obtained from the product of mass and velocity. The SI unit of Kinetic energy is Joule(J).
K.E = 1/2 (mv²) where m is the mass of the object and its unit is the kilogram. v is the velocity of the object and its unit is m/s. The momentum of the object is obtained from the product of mass and velocity.
From the given,
Mass of the object (m) = 2 kg
Linear momentum of the object = 6 kg.m/s
Linear momentum (p) = m×v (m = mass of the object, v= velocity of the object)
v = p / m
= 6 / 2
= 3 m/s
The velocity of the object = 3 m/s
Kinetic energy = 1/2 (mv²)
K.E = 1/2 (2×3×3)
= 9 joules
Thus the kinetic energy of the object is 9 joules (J).
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b. transferred
c. lost
d. created
Answers
The answer is (b)
That is because energy cannot be created nor destroyed, only conducted.