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Sever21 [200]
2 years ago
7

Diagram the cross section of a graduated cylinder, illustrating how to read the meniscus.

Physics
2 answers:
denis-greek [22]2 years ago
7 0

Answer:

Explanation:

While taking the reading from a test tube( or cross section of a graduated cylinder) we note the value at lower meniscus. We should also keep in mind at the time of reading, our hand should be stable(to minimize human error) and at this stable condition lower meniscus would the the right reading.

Gre4nikov [31]2 years ago
3 0
<span>When taking the reading you must see where the lower meniscus lies . The value at which the lower meniscus lies is your reading .</span>
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How dose the speed of the sound differ in water, iron, and Helium?
stepladder [879]

Answer:

             air       water      iron        helium

v(m/s)   280     2200      17780     39682

Explanation:

The speed of a wave depends on the physical properties of the medium where it travels, in the case of a longitudinal wave such as sound, it depends on the resistance to deformation (volume modulus and the density of the medium

         v = \sqrt{ \frac{B}{ \rho } }

in the mentioned materials they are constant  

             air       water      iron        helium

B           1 10⁵    2.2 10⁹    140 10⁹   0.05 10⁹

ρ           1.28     997        7874       1.26

v(m/s)   280     2200      17780     39682

4 0
2 years ago
A lens for a spotlight is coated so that it does not transmit yellow light. if the light sources is white, what color is the spo
CaHeK987 [17]
White light is consists of red,blue and green lights yellow lights are consists of red and green lights so when the white light falls on the lens the light that passes through is blue  
3 0
3 years ago
If you add a battery to a series circuit what will happen to the current in the circuit
Evgen [1.6K]

If there wasn't any battery before, then there was no current
in the circuit before, and there IS one now.  That's just about
the greatest change possible.

If there WAS a battery there before and you added another one
in series with it, then there are a few different possibilities for the
effect on the current in the circuit:

-- If the new battery has the same voltage as the original one,
AND you connect the new one so that they're both in the same
direction, then the current in the circuit will become double the
original current (twice as much as it was before).

-- If the new battery has the same voltage as the original one, AND
you connect the new one so that they're in opposite directions, then
the two batteries cancel each other, the total voltage becomes zero,
and the current in the circuit completely disappears.

-- If the voltage of the two batteries is different AND you connect
the new one so that they're both in the same direction, then the
current in the circuit increases, by a factor of

         (sum of the two battery voltages)
divided by
         (voltage of the original battery alone).

-- If the voltage of the two batteries is different AND you
connect the new one so that they're in opposite directions,
then the current in the circuit decreases, by a factor of

           (difference of the two battery voltages)
divided by
            (voltage of the original battery alone)

and the current flows in the direction of whichever battery has
the greater voltage.  If the new battery has greater voltage than
the original one alone, then the current reverses, and flows in
the opposite direction.

I think that covers all the possibilities.
4 0
3 years ago
Consider a grill with the lid closed to be a closed system. The propane provides chemical energy. The propane is ignited to prod
katrin [286]

'A' and 'C' talk about energy being created and destroyed.  That can't happen.

'D' trailed off in the middle, and we don't know WHAT it was talking about.

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6 0
3 years ago
A ball is thrown off the top of a building and lands on the ground below.
natita [175]

Answer:

Mass and velocity.

Explanation:

Kinetic energy <u>is the energy that an object has due to its movement</u>, mathematically it is represented as follows:

K=\frac{1}{2} mv^2

where m is the mass of the object, and v is its velocity at a given point in time.

So we can see that to find the kinetic energy just before the ball hits the gound, we need the quantities:

  • mass of the ball
  • velocity of the ball before it hits the ground

With the knowledge of these two quantities the kinetic energy of the ball  before touching the gound can be determined.

4 0
3 years ago
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