Answer:
Explanation:
We are told that the volume of liquid measured is
However, we also know that the beaker is graduated every 1 mL. This means that the sensitivity of the instrument is
This means that we cannot measure the volume of the liquid with a precision better than this value. So, the actual measurement of the liquid volume is
Or, written as interval,
In hotter temperatures, The speed of sound would move slower, since the air particles(The medium for sound to travel) would be more spread out in lower air pressure, for colder temperatures, the particiles are more compact, allowing sound to go farther, faster.
The magnitude of the magnetic field in the region through the current passes is 8×10⁻³ T.
<h3>What is a magnetic field?</h3>
The magnetic field is defined as the field the magnetic materials generate or when an electric charge moves in a field region that generates the magnetic field.
As we know:
F = ilB
F is the magnetic force
i is the current
l is the length
B is the magnitude of the magnetic field
Here F/l = 0.120 N/m
i = 15 A
B = (F/l)(1\i)
B = (0.120)(1/15)
B = 0.120/15
B = 8×10⁻³ T
Thus, the magnitude of the magnetic field in the region through the current passes is 8×10⁻³ T.
Learn more about the magnetic field here:
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Answer:
The diagram shows refraction, and medium 1 is less dense than medium 2.
Explanation:
- Reflection occurs when a light ray hits a surface and bounces back into the same medium
- Refraction occurs when a light ray crosses the interface between two different mediums, changing direction
From the diagram, we clearly see that this is a case of refraction, since the light ray crosses the boundary between two mediums.
The direction of a light ray in refraction is given by Snell's Law:
(1)
where
n1 and n2 are the index of refraction of the two mediums: a higher index of refraction means a higher density for the medium
are the angles of the light ray in medium 1 and medium 2, measured with respect to the normal to the interface
We can rewrite eq. (1) as
From the diagram, we see that
so
and so
which means
so, medium 2 is denser than medium 1, and the correct answer is
The diagram shows refraction, and medium 1 is less dense than medium 2.
Answer:
lifting a bag of groceries.
work is force by distance, if there is no movement there is no work done