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3 years ago

What is the advantage of the SI unit over CGS units?

Physics

1 answer:

MatroZZZ [7]3 years ago

8 0

Answer:

The advantage of the SI unit over CGS unit are:

S.I has broader base. It has seven base units and two supplementary units.
S.I is metric.
S.I is coherent.
S.I is rational, i.e. it gives one unit for one physical quantity .e g. for energy of any type i.e, mechanical or heat or electrical.There is only one unit Joule(J) but in M.K.S system unit for mechanical energy is joule.

HOPE IT WILL HELP YOU

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A speaker fixed to a moving platform moves toward a wall, emitting a steady sound with a frequency of 235 Hz. A person on the pl

zysi [14]

Answer: 2.9 m/s

Explanation:

The frequency of the beat is 4 Hz

The relative Doppler frequency is 235 + 4 = 239 Hz

We would be solving this question, using the formula for Doppler's effect

f(d) = f(v+vr)/(v-vs), where

F = 235 Hz

F(d) = 239 Hz

v = 344 m/s and vr = vs

239 = 235 (344 + vr) / (344 - vr)

239 ( 344 - vr) = 235 (344 + vr)

82216 - 239 vr = 80849 + 235 vr

82216 - 80849 = 235 vr + 239 vr

1376 = 474 vr

vr = 1376/474

vr = 2.9 m/s

Thus the speed the platform should move is 2.9 m/s

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3 years ago

Part 1: A rope has one end tied to a vertical support. You hold the other end so that the rope is horizontal. If you move the en

Anit [1.1K]

1) c. 2 m/s

Explanation:

The relationship between frequency, wavelength and speed of a wave is

$v=\lambda f$

where

v is the speed

$\lambda$ is the wavelength

f is the frequency

For the wave in this problem,

f = 4 Hz

$\lambda=0.5 m$

So, the speed is

$v=(0.5 m)(4 Hz)=2 m/s$

2) a. 2.8 m/s

The speed of the wave on a string is given

$v=\sqrt{\frac{T}{\mu}}$

where

T is the tension in the string

$\mu$ is the linear mass density

In this problem, we have:

$T=2 \cdot 4 N=8 N$ (final tension in the rope, which is twice the initial tension)

$\mu = 1 kg/m$ --> mass density of the rope

Substituting into the formula, we find

$v=\sqrt{\frac{8 N}{1 kg/m}}=2.8 m/s$

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3 years ago

An object has 90000 J of kinetic energy and is moving at 12 m/s. what is the objects mass?

Klio2033 [76]

Answer:

1250kg

Explanation:

we can solve this using the formula for the Kinetic Energy

$Kinetic.Energy=\frac{1}{2}*mass*velocity^{2}\\mass=\frac{2*Kinetic.Energy}{velocity^{2}}\\mass=\frac{2*90000}{12^{2}}\\\\mass=1250kg$

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4 years ago

1. The first thing to do in the event of brake failure is to a. use the parking brake to stop your carb. pump the brake pedal ra

mars1129 [50]

Answer:

The correct answers are -

1. b. pump the brake pedal rapidly

2. d. all of the above

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Explanation:

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3 years ago

How does distance between two objects affect their gravitational force?

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Force decreases as distance increases

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