2 years ago

Witch device uses AC current to operate

Physics

1 answer:

ololo11 [35]2 years ago

7 0

Answer:

Depending on the locomotive, it can use steam, batteries or a diesel engine.

A car uses a DC battery to start it and an internal combustion engine to run it (unless it is an electric car, then it uses DC batteries.

A portable media player can use either a/c or a battery.

A flashlight uses DC batteries.

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Alja [10]

The answer is increase

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2 years ago

A tray is moved horizontally back and forth in simple harmonic motion at a frequency of f = 2.07 Hz. On this tray is an empty cu

Anettt [7]

Answer:

Explanation:

Given

Frequency of SHM is $f=2.07\ Hz$

Amplitude of SHM is $A=3.13\ cm$

Cup begins to slip when it overcomes the friction force

Friction force $F_s=\mu mg$

Applied force $F=ma$

$ma=\mu mg$

$a=\mu g$

and maximum acceleration during SHM is

$a=A\omega ^2$

$a=A(2\pi f)^2$

$a=3.13\times 10^{-2}\times (2\pi 2.07)^2$

$a=5.296\ m/s^2$

$\mu =\frac{a}{g}$

$\mu =\frac{5.296}{9.8}=0.54$

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3 years ago

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A man attempts to push a 19.8 kg crate across a warehouse floor. He slowly increases the force until the crate starts to move at

VARVARA [1.3K]

Answer:

μ = 0.18

Explanation:

Let's use Newton's second Law, the coordinate system is horizontal and vertical

Before starting to move the box

Y axis

N-W = 0

N = W = mg

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F -fr = 0

F = fr

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fr = μ N

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F = μ m g

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calculate

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2 years ago

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Work can be defined as the energy transferred from a body to its sorroundings, the energy spent to move a body, or the energy you need to alter a charged particle, so no energy, no work; thus, the statement is true.

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2 years ago

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The correct answer would be 5 hope this helps.

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2 years ago

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