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3 years ago

Which refers to the distance between two crests or two troughs on a transverse wave? wavelength amplitude frequency hertz

Physics

2 answers:

Alchen [17]3 years ago

8 0

Answer:

Wavelength

Explanation:

KonstantinChe [14]3 years ago

4 0

Answer:

can i have brainest

Explanation:

wavelength

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Why are liquids used in a hydraulic system

faust18 [17]

Liquids are used in a hydraulic system because unlike gases, liquids CAN NOT BE compressed therefore making them the ideal substance for the hydraulic system.

3 0

3 years ago

Am radio signals are broadcast at frequencies between 550 khz and 1600 khz and travel 2.99792 × 108 m/s. What is the shortest am

Rus_ich [418]

Answer:

187.37 m

Explanation:

The wavelength of an electromagnetic wave is given by:

$\lambda=\frac{c}{f}$

where

c is the speed of light

f is the frequency

We see that the wavelength is inversely proportional to the frequency: this means that the shortest am wavelength will occur at the highest am frequency, which is

$f=1600 kHz = 1600 \cdot 10^3 Hz$

And substituting also the speed of light

$c=2.99792 \cdot 10^8 m/s$

We find the wavelength:

$\lambda=\frac{2.99792 \cdot 10^8 m/s}{1600\cdot 10^3 Hz}=187.37 m$

5 0

3 years ago

A 2-kg rock is thrown vertically upward at a speed of 3.2 m/s from the surface of the moon. If it returns to its starting point

worty [1.4K]

Answer:

1.6 m/s2

Explanation:

Let $g_m$ be the gravitational acceleration of the moon. We know that due to the law of energy conservation, kinetic energy (and speed) of the rock when being thrown upwards from the surface and when it returns to the surface is the same. Given that $g_m$ stays constant, we can conclude that the time it takes to reach its highest point, aka 0 velocity, is the same as the time it takes to fall down from that point to the surface, which is half of the total time, or 4 / 2 = 2 seconds.

So essentially it takes 2s to decelerate from 3.2 m/s to 0. We can use this information to calculate $g_m$

$g_m = \frac{\Delta v}{\Delta t} = \frac{0 - 3.2}{2} = \frac{-3.2}{2} = -1.6 m/s^2$

So the gravitational acceleration on the Moon is 1.6 m/s2

8 0

3 years ago

A river flows with a uniform velocity vr. A person in a motorboat travels 1.22 km upstream, at which time she passes a log float

storchak [24]

Answer:

t ’= $\frac{1450}{0.6499 + 2 v_r}$ , v_r = 1 m/s t ’= 547.19 s

Explanation:

This is a relative velocity exercise in a dimesion, since the river and the boat are going in the same direction.

By the time the boat goes up the river

v_b - v_r = d / t

By the time the boat goes down the river

v_b + v_r = d '/ t'

let's subtract the equations

2 v_r = d ’/ t’ - d / t

d ’/ t’ = 2v_r + d / t

$t' = \frac{d'}{ \frac{d}{t}+ 2 v_r }$

In the exercise they tell us

d = 1.22 +1.45 = 2.67 km= 2.67 10³ m

d ’= 1.45 km= 1.45 1.³ m

at time t = 69.1 min (60 s / 1min) = 4146 s

the speed of river is v_r

t ’= $\frac{1.45 \ 10^3}{ \frac{ 2670}{4146} \ + 2 \ v_r}$

t ’= $\frac{1450}{0.6499 + 2 v_r}$

In order to complete the calculation, we must assume a river speed

v_r = 1 m / s

let's calculate

t ’= $\frac{ 1450}{ 0.6499 + 2 \ 1}$

t ’= 547.19 s

8 0

3 years ago

If the temperature of an iron sphere is increased

lesya692 [45]

<h2>Answer: its density will decrease</h2>

By increasing the temperature of the iron sphere, its volume will increase (due to the material of which it is composed), this is a phenomenon known as<em> thermal dilation</em>. However, the mass of the sphere will remain the same.

On the other hand, density $D$ is a characteristic property of substances and materials and is defined as the relationship between the mass $m$ and volume $V$ of a specific substance or material, as shown below:

$D=\frac{m}{V}$

This means <u>density is inversely proportional to volume</u>. Therefore, increasing the temperature of the iron sphere, its volume will be increased and <em><u>its density will be decreased</u></em>.

5 0

3 years ago