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3 years ago

To impress his friends while riding on a carnival

Physics

1 answer:

s344n2d4d5 [400]3 years ago

8 0

Answer:

B. decreases while his angular speed remains unchanged.

Explanation:

His angular speed will always be the same as the wheel's angular speed, which remains constant as it's in uniform motion. As for linear speed, which is defined as the product of angular speed and distance r to the center of rotation, and his distance to center is decreasing, his linear speed must be decreasing as well.

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What property of sound enables us to distinguish one sound source from another?

PtichkaEL [24]

The pitch of a sound enables us to distinguish this.

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3 years ago

005 (part 1 of 2) 10.0 points

Anton [14]

A constant speed motion is one in which equal distances are covered in equal times

The bird travels a cumulative distance of 7. $\overline 3$ km

The reason the above value is correct is as follows:

The known parameters are;

Speed of the runner, $v_r$ = 2.1 km/hr

The location where the bird begins to fly to the finish line = When the runner is 4.4 km from the finish line

The speed of the bird, $v_b$ = 10.5 km/hr = 5 times the runners speed

The bird reaches the finish line, turns, and returns back to the runner

Required:

The find cumulative distance traveled by the bird

Solution:

The distance the bird travels is five times the distance the runner travels, therefore,

Let x represent the distance the runner ravels before the bird returns, we have;

The distance the bird travels = 4.4 + 4.4 - x = 8.8 - x

The distance the runner travels = x

The time the runner runs x km = The time the bird flies (8.8 - 4) km

$From \ velocity = \dfrac{Distance }{Time}$ , we have;

$Time= \dfrac{Distance }{Velocity}$

Given the time taken by the runner is equal to the time taken by bird, while running, we have;

$Time= \dfrac{x}{2.1} = \dfrac{8.8 - x}{10.5}$

Therefore;

10.5·x = 2.1·(8.8 - x) = 2.1×8.8 - 2.1·x

10.5·x + 2.1·x = 2.1×8.8 = 18.84

12.6·x = 18.84

$x = \dfrac{18.84}{12.6} =\dfrac{22}{15} = 1.4 \overline 6$

$The \ distance \ the \ bird \ travels = 8.8 - \dfrac{22}{15} \approx \dfrac{22}{3} = 7. \overline 3$

The cumulative distance the bird travels is 7. $\overline 3$ km

Learn more about constant speed motion here:

brainly.com/question/12684433

3 0

1 year ago

As it travels through a crystal, a light wave is described by the function E(x,t)=Acos[(1.57×107)x−(2.93×1015)t]. In this expres

Drupady [299]

Answer:

Speed, $v=1.86\times 10^8\ m/s$

Explanation:

It is given that,

A light wave is described by the following function as :

$E(x,t)=A\ cos[(1.57\times 10^7)x-(2.93\times 10^{15})t]$ .....(1)

The general equation of wave is given by :

$E=Acos(kx-\omega t)$ ........(2)

On comparing equation (1) and (2)

$k=(1.57\times 10^7)$

$\dfrac{2\pi}{\lambda}=(1.57\times 10^7)$

$\lambda=\dfrac{2\pi}{(1.57\times 10^7)}$

Wavelength, $\lambda=4.002\times 10^{-7}\ m$

$\omega=(2.93\times 10^{15})$

$\dfrac{2\pi}{T}=(2.93\times 10^{15})$

$\dfrac{1}{T}=\dfrac{(2.93\times 10^{15})}{2\pi}$

Frequency, $f=4.66\times 10^{14}\ Hz$

Let v is the speed of the light wave. It is given by :

$v=f\times \lambda$

$v=4.66\times 10^{14}\ Hz\times 4.002\times 10^{-7}\ m$

$v=1.86\times 10^8\ m/s$

So, the speed of the light wave is $1.86\times 10^8\ m/s$ . Hence, this is the required solution.

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3 years ago

Which statements describe the Gironde ecosystem

Alchen [17]

Answer:

Gironde Ecosystem is an important biological and cultural area.

Explanation:

6 0

2 years ago

a kid on a playground swing makes 6 complete to-and-from swings each 30 seconds (a) the frequency of the swinging is? (b) the pe

Mariana [72]

The frequency is how many per second:

(6 swings)/(30 sec) = (6/30) swing/sec = 0.2 per sec = 0.2 Hz .

The period is how long each one takes, or seconds per swing.
It's exactly the flip of frequency.
So we could just take the frequency, flip it, and find 1 / 0.2 ,
but let's do it the long way:

(30 sec) / (6 swings) = (30/6) sec/swing = 5 seconds .

4 0

3 years ago

Read 2 more answers