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3 years ago

A wave has a wavelength of 8 mm and a frequency of 4 hertz. What is its speed?

Physics

2 answers:

BigorU [14]3 years ago

4 0

Wave speed = wavelength* frequency
(M/s). (M). (Hz)

8mm-0.008m

0.008m*4Hz=
Wave speed = 0.032m/s

Valentin [98]3 years ago

3 0

Remember that the speed of a wave is the product of both the wavelength and the frequency of the wave.

First convert the units to m and then multiply the values to calculate its propagation or wave speed.

C = lambda • frequency.

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How is momentum conserved is a Newton's cradle when one steel ball hits the other

Vikentia [17]

Answer:

Newton's Cradle experiment perfectly demonstrates the law of conservation of momentum which states that in a closed system, momentum before the collision is equal to momentum after the collision of the system.

As the first ball swings in the air, it gains momentum. When it strikes the second ball, it loses momentum and second ball gains equal amount of momentum. The second ball transfers the momentum to third, then fourth and till the last. The last ball when gains the same momentum swings up in the air. This continues. This experiment is done in drag free condition. This means there is no loss of momentum or opposing forces present.

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3 years ago

PLZ ANSWER ASAP!!!!!!!

jenyasd209 [6]

Explanation:

It is given that,

Mass of platinum bar, m = 750 g

Length of the bar, l = 5 cm

Breadth of the bar, b = 4 cm

Width of the bar, h = 1.5 cm

Volume of the bar, $V=l\times b\times h$

$V=5\times 4\times 1.5=30\ cm^3$

We need to find the density of the platinum bar. The density of any substance is given by :

$d=\dfrac{m}{V}$

$d=\dfrac{750\ g}{30\ cm^3}$

$d=25\ g/cm^3$

So, the density of the platinum bar $25\ g/cm^3$ . Hence, this is the required solution.

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3 years ago

In the same year, the average finishing time for U.S. women was 4 hours and 41 minutes. What was the average female speed in mil

Nana76 [90]

We have that for the Question "In the same year, the average finishing time for U.S. women was 4 hours and 41 minutes. What was the average female speed in miles per hour?" it can be said that

The average female speed in miles per hour

$V_a=\frac{D}{4.683hours}$

From the question we are told

In the same year, the average finishing time for U.S. women was 4 hours and 41 minutes. What was the average female speed in miles per hour?

<h3>Average speed </h3>

This is defined as the collective mean of different travel intervals

Generally the equation for Speed is mathematically given as

V=\frac{Distance}{Time}

Therefore

For 4 hours and 41 minutes=4.683hours

This travels time was obtained over a series of distance

Hence

Distance D

The average female speed in miles per hour

$V_a=\frac{D}{4.683hours}$

For more information on speed visit

brainly.com/question/7359669

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2 years ago

A solar cell has an open circuit voltage value of 0.60 V with a reverse saturation current density of Jo = 3.9 × 10−9 A/m2 . The

xenn [34]

Answer:

Explanation:

given data

ocv=0.6 V

Vmax= 0.52 v

J₀= 3.9*10⁻⁹

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3 years ago

Where can I download high school textbooks online?

MArishka [77]

probrably at the schools website but i dont know what school you go to so i would need more info

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