a = (V - V₀) / t = (14 - 4) / 10 = 10 / 10 = 1 m/s²
Answer:
In an electric bulb the filament gets hot which glows and produces light. This is called lighting effect of electricity.
Explanation:
Answer:
Part a)
Part b)
Part c)
Part d)
Displacement for entire trip = 0
Part e)
Average velocity for entire trip will be zero
Explanation:
Part a)
Displacement after t = 2.4 hours is the straight line distance between initial and final positions
so we have
Part b)
Average velocity is defined as
Part c)
During his return journey the displacement will be same
so average velocity is defined as
Part d)
Displacement for entire trip = 0
as initial and final position will be same
Part e)
Average velocity for entire trip will be zero
Answer: 5 units
Let's begin by stating clear that movement is the change of position of a body at a certain time. So, during this movement, the body will have a trajectory and a displacement, being both different:
The trajectory is the path followed by the body (is a scalar magnitude).
The <u>displacement</u> is the distance in a straight line between the initial and final position (is a vector magnitude).
According to this, in the description of the object (figure attached) placed at 0 on a number line and moving some units to the left and some oter units to the right, we are talking about the path followed by the object, hence its trajectory. So, 13 units is its trajectory.
But, if we talk about displacement, we have to draw a straight line between the initial position of the object (point 0) to its final position (point 5).
Now, being this an unidimensional problem, the displacement vector for this object is 5 units.
Given that,
Speed 1 = 40m/s
Speed 2 = 30m/s
F ( Frequency)= 1000Hz
S ( Speed of sound) = 343 m/s
The wavelength in air of the siren sound is,
Stationary Wavelength λ = S/F= 343/1000= 0.343m
Hence the wavelength in air of the siren sound if the police car were at rest will be 0.343m.
<h3>
What is a simple definition of a wavelength?</h3>
A waveform signal that is carried in space or down a wire seems to have a wavelength, which is the distance between two identical places (adjacent crests) in the consecutive cycles. In wireless systems, this length is often expressed in meters (m), centimeters (cm), or millimeters (mm) (mm).The medium (such as a vacuum, air, or the water) through which a wave travels determines its wavelength. Waves can range from music to light to water to periodic electrical signals in a conductor.
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