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3 years ago

If the speed of an object is unchanging, then what must be true?

Physics

2 answers:

Kazeer [188]3 years ago

7 0

If the speed of an object is unchanging, then the object is traveling at a <em>constant speed</em>.

"Unchanging" and "constant" mean the same thing.

lutik1710 [3]3 years ago

3 0

Answer:

If the speed of an object is unchanging it means that it's traveling at a constant speed.

If the speed of the object increases or decreases it means that the speed is changing. That's why those options are not valid.

The average speed implies that the speed changes over time, but just the average remains the same. That's why this option is not valid.

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The Morpho rhetenor butterfly is shown above. The name Morpho refers to the butterfly's

balu736 [363]

The name Morpho refers to the butterfly's genus name. The genus name is a taxonomic category that is ranked above the species name and below the family name. The name morpho means changed or modified which applies the the way a lava undergoes metamorphosis and changes into a butterfly. Most morpho butterflies have a colour of metallic, shimmering shades of blue and green.

7 0

4 years ago

Light-rail passenger trains that provide transportation within and between cities speed up and slow down with a nearly constant

ExtremeBDS [4]

Answer:

Final Speed: 26m/s

Explanation:

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3 years ago

In a machining operation that approximates orthogonal cutting, the cutting tool has a rake angle =100 . The chip thickness ratio

Rudik [331]

Answer:

The percentage of the total energy dissipated into shear plane is 89.46%.

Explanation:

Given that,

Rake angle = 10°

Thickness ratio= 0.5

Cutting Force = 400 N

Thrust force = 200 N

Speed =3 m/s

Suppose the shear force is 345.21 N.

We need to calculate the shear plane angle

Using formula shear angle

$\tan\phi=\dfrac{r\cos\alpha}{1-r\sin\alpha}$

Put the value in to the formula

$\tan\phi=\dfrac{0.5\cos10}{1-0.5\sin10}$

$\tan\phi=0.539$

$\phi=\tan^{-1}(0.539)$

$\phi=28.32^{\circ}$

We need to calculate the shear velocity

Using formula of shear velocity

$v_{2}=\dfrac{v\cos\alpha}{\cos(\phi-\alpha)}$

Put the value into the formula

$v_{2}=\dfrac{3\times\cos10}{\cos(28.32-10)}$

$v_{2}=3.11\ m/s$

We need to calculate the percentage of the total energy dissipated into shear plane

Using formula of energy dissipated

$\%d=\dfrac{P_{s}}{P}\times100$

$\%d=\dfrac{F_{s}\times v_{c}}{F_{c}\times v}\times100$

Put the value into the formula

$\%d=\dfrac{345.21\times3.11}{400\times3}\times100$

$d=89.46\%$

Hence, The percentage of the total energy dissipated into shear plane is 89.46%.

6 0

3 years ago

How do you measure the amplitude of a longitudinal wave?

sp2606 [1]

You do it by the pressure difference it causes in the medium. Even in transversal waves, you usually need different units than meters because the wave has electric and magnetic vectors and not really any height to speak of.

you measure the amount of excursion from the equilibrium (no wave) level of whatever parameter is fluctuating.

3 0

4 years ago

On isolated ground receptacles, the metal yoke ____ integrally bonded to the equipment grounding terminal of the receptacle.

Ede4ka [16]

On isolated ground receptacles, the metal yoke is not allowed to be integrally bonded to the equipment grounding terminal of the receptacle.

Any device with two distinct switches or receptacles is a duplex device. It can be shaped to fit a Decora opening or a typical duplex plate opening. It should be noted that they can be combination devices with a switch/outlet, switch/pilot light, etc.

Because of grounding connection removal and receptacle, it is utterly undesirable to connect the two bare equipment grounding conductors together directly.

The equipment grounding conductor associated with those circuits must be connected to the box when circuit conductors are terminated on equipment inside a metal box to prevent unneeded current discharge.

Learn more about grounding conductors here brainly.com/question/14886979

#SPJ4.

4 0

2 years ago