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4 years ago

14

A dog begins walking at a speed of 6 kilometers per hour. After 1 hour, the dog is walking at a speed of 4 kilometers per hour.

Which is this an example of?

1 answer:

ExtremeBDS [4]4 years ago

4 0

This is an example of Negative Acceleration because its speed is decreased.

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Why do bases make good household cleaners? a. They are not irritants c. They have low pH's b. They are not corrosive d. They rea

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D. they react with oils and fats

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3 years ago

hi :) is it true that zero acceleration means the object can be moving at constant velocity or at rest?

nirvana33 [79]

Answer:

No

Explanation:

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3 years ago

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Toby's Trucking Company determined that on an annual basis, the distance traveled per truck is normally distributed, with a mean

Reptile [31]

Answer: 56994 miles

Explanation:

Given : Toby's Trucking Company determined that on an annual basis, the distance traveled per truck is normally distributed with

$\mu=50,000\text{ miles}$

Standard deviation : $\sigma=12,000\text{ miles}$

Let a be the distance traveled by at least 72% of the trucks.

Let X be the random variable that represents the distance traveled by a truck

Then $P(x\geq a)=0.72$

The critical value corresponds to p-value 0.72 : $z=0.5828415$

Also, $z=\dfrac{x-\mu}{\sigma}$

$\Rightarrow\ 0.5828415=\dfrac{a-50000}{12000}\\\\\Rightarrow\ a=12000(0.5828415)+50000=56994.098\approx56994$

Hence, 56994 miles will be traveled by at least (equal to and more than) 72% of the trucks .

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3 years ago

If you drop a bowling ball, a tennis ball, and a feather from the top of a tall building at the same time, which one will hit th

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They hit at the same time. Everything falls at the same rate.

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3 years ago

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Light from a laser strikes a diffraction grating that has 5500 lines per centimeter. The central and first-order maxima are sepa

WINSTONCH [101]

.Answer:

491.4 nm

Explanation:

The distance between central and first maxima is,

$y=0.455m$

And the distance between screen abnd grating is,

$L=1.62 m$

Now the angle can be find as,

$tan\theta=\frac{y}{L} \\\theta=tan^{-1}(\frac{0.455}{1.62}) \\\theta=15.68^{\circ}$

Now the grating distance is,

$d=\frac{1}{5500} cm\\d=1.82\times 10^{-6}m$

Now with m=1 condition will become,

$\lambda=dsin\theta$

So,

$\lambda=1.82\times 10^{-6}m\times sin(15.68^{\circ})\\\lambda=1.82\times 10^{-6}m\times 0.270\\\lambda=491.4\times 10^{-9}m\\\lambda=491.4 nm$

Therefore the wavelength of laser light is 491.4 nm.

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3 years ago