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pogonyaev
2 years ago
8

What is the SI unit for intensity?

Physics
1 answer:
Allisa [31]2 years ago
8 0

Answer:

The SI unit of intensity is the watt per square meter/metre (W/m^2.)

Explanation:

Intensity is equal to the power transferred per unit area. Since power is measured in watts (W) and 1 W = 1 J/s, then intensity can be viewed as how fast energy goes through a certain area.

In physics, intensity is often used when studying light, sound, or other phenomena that involve waves or energy transfer. (With waves, the power value is taken as the average power transfer over the wave's period.)

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sleet_krkn [62]

speed of the car is given on the road

v = 22 m/s

reaction time is given as

t = 0.50 s

now we can find the distance that it will move during this reaction time

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so the distance that it will move before stop is given by

v_f^2 - v_i^2 = 2 a d

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d = 24.2 m

so the total distance that it require to stop is given as

d = 24.2 + 11 = 35.2 m

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3 0
3 years ago
A 40-cm-long tube has a 40-cm-long insert that can be pulled in and out. A vibrating tuning fork is held next to the tube. As th
Umnica [9.8K]

Answer:

The frequency of the tuning is 1.065 kHz

Explanation:

Given that,

Length of tube = 40 cm

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Using formula for length

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\Delta L=74.7-58.6

\Delta L=16.1\ m

For an open-open tube,

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\lambda=2\times16.1

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Using formula of frequency

f=\dfrac{v}{\lambda}

Put the value into the formula

f=\dfrac{343}{32.2\times10^{-2}}

f=1065.2\ Hz

f=1.065\ kHz

Hence, The frequency of the tuning is 1.065 kHz

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