Ask question

Ask question

All categories

2 years ago

8

A sound wave has a frequency of 295 Hz and travels the length of a football field, 91.4 m in 0.506 s. What is the period of the

wave?

1 answer:

dem82 [27]2 years ago

7 0

Answer:1/295 seconds

Explanation:

Period=1/frequency

Period=1/295 seconds

You might be interested in

our iclicker operates at a frequency of approximately 900 mhz (900x106 hz). what is the approximate wavelength of the em wave pr

Elena-2011 [213]

wavelength of the EM wave produced by your iclicker is 0.33 m.

<h3>What makes an EM wave?</h3>

When an electric field (illustrated in red arrows) combines with a magnetic field, electromagnetic waves are generated (which is shown in blue arrows). An electromagnetic wave's magnetic and electric fields are perpendicular to each other and to the wave's direction.
A changing magnetic field causes a changing electric field, and vice versa—the two are inextricably related. Electromagnetic waves are created by changing fields. Electromagnetic waves, unlike mechanical waves, do not require a medium to propagate.

The clicker emits EM (electromagnetic) wave which travels at the speed of light, that is

v = 3 x 10⁸ m/s

The frequency is

f = 900mHz = 9 x 10⁸ Hz

velocity = frequency * wavelength, the wavelength, λ, is given by

fλ = v

λ = v/f

= (3 x 10⁸ m/s) / (9 x 10⁸ 1/s)

= 1/3 m = 0.333 m

To learn more about electromagnetic waves refer,

brainly.com/question/25847009

#SPJ1

6 0

10 months ago

Which one of the following is not an example of the wedge? <br> ax <br> chisel <br> nut <br> nail

Shkiper50 [21]

NUT...............................

6 0

3 years ago

Read 2 more answers

How much heat is needed to raise the temperature of 8g of water by 15oC?

Murrr4er [49]

<h2>Answer: 502.08 J</h2>

Explanation:

The heat (thermal energy) needed in to raise the temperature in a process can be found using the following equation:

$Q=m.C.\Delta T$ (1)

Where:

$Q$ is the heat

$m=8 g$ is the mass of the element (<u>water</u> in this case)

$C$ is the specific heat capacity of the material. In the case of water is $C=4.184\frac{J}{g\°C}$

$\Delta T=15\°C$ is the variation in temperature <u>(which is increased in this case)</u>

Knowing this, let's rewrite (1) with these values:

$Q=(8 g)(4.184\frac{J}{g\°C})(15\°C)$ (2)

Finally:

$Q=502.08 J$

5 0

3 years ago

A wire of Nichrome (a nickelâ€“ chromiumâ€“ iron alloy commonly used in heating elements) is 1.0 m long and 1.0 mmÂ² in cross-se

Lyrx [107]

Answer:

The conductivity of Nichrome is $2\times 10^6\ S/m$ .

Explanation:

Given:

Potential difference (V) = 2.0 V

Current flowing (I) = 4.0 A

Length of wire (L) = 1.0 m

Area of cross section of wire (A) = 1.0 mm² = 1 × 10⁻⁶ m² [1 mm² = 10⁻⁶ m²]

We know, from Ohm's law, that the ratio of voltage and current is always a constant and equal to the resistance of the resistor. Therefore, the resistance of the nichrome wire is given as:

$R=\frac{V}{A}=\frac{2.0}{4.0}=0.5\ \Omega$

Now, resistance of the nichrome wire in terms of its resistivity, length and area of cross section is given as:

$R=\rho\frac{L}{A}$

Where, $\rho\to resistivity\ of\ Nichrome$

Now, plug in all the values given and solve for $\rho$ . This gives,

$0.5\ \Omega=\rho\frac{1.0\ m}{1\times 10^{-6}\ m^2}\\\\\rho=\frac{0.5\times 1\times 10^{-6}}{1.0}=0.5\times 10^{-6}\ \Omega-m$

Now, conductivity of a material is the reciprocal of its resistivity. Therefore, the conductivity of Nichrome is given as:

$\sigma=\frac{1}{\rho}=\frac{1}{0.5\times 10^{-6}}=2\times 10^6\ S/m$

Conductivity is measured in Siemens per meter (S/m)

Therefore, the conductivity of Nichrome is $2\times 10^6\ S/m$ .

7 0

2 years ago

Which force causes a wagon to speed up as it rolls down a hill?

Temka [501]

Gravity is the only one helping it.

7 0

2 years ago

Read 2 more answers