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tensa zangetsu [6.8K]
3 years ago
9

Name some devices we use to make measurements

Physics
1 answer:
NikAS [45]3 years ago
4 0

Answer:

Explanation:

Ruler. A steel ruler aids the measurement and layout of straight lines. The ruler, also called "straightedge" or "straight-edged ruler," is a long, thin strip of wood, metal or plastic marked with increments of measurement.

Measuring Tape. The modern measuring tape's roughly palm-sized casing contains a coiled strip of metal marked with increments of measurement. The metal strip, called "tape," attaches to a spring which automatically retracts the tape into the casing following use.

Walking Tape Measure. The walking tape measure, also called "surveyor's measure," records the distance traveled by a wheel. An operator pushes the measure's wheel, similar to a bicycle wheel, by a handle as an attached ticker box displays feet or meters in the same format as a car's odometer.

Laser Measure. The laser measure offers point and shoot distance measurement. In its most basic form, a laser measure is a hand-held electronic device with a digital display.

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Answer:

  v_average = 15 m / s

Explanation:

The average speed can be found in two ways,

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* taking the velocities in each time interval and then finding the weighted average by the time fraction

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Let's apply this last equation

               

Total time is

               t = t₁ + t₂

               t = 10 + 10 = 20   min

              v_average = 10/20 10 + 10/20 20

              v_average = 10/2 + 20/2

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4 years ago
What visible wavelengths of light are strongly reflected from a 390-nm-thick soap bubble?
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Answer:

So visible wavelength which is possible here is

416 nm and 693.3 nm

Explanation:

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2\mu t + \frac{\lambda}{2} = N\lambda

now for visible wavelength we have

for N = 1

2\mu t = \frac{\lambda}{2}

\lambda = 4\mu t

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for N = 2

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\lambda = \frac{4(\frac{4}{3})(390 nm)}{3}

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for N = 3

\lambda = \frac{4\mu t}{5}

\lambda = \frac{4(\frac{4}{3})(390 nm)}{5}

\lambda = 416 nm

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Answer:

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=3\4

3\4=0.75m

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Explanation:

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