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3 years ago

What is the speed of a wave with a wavelength of 3 m and a frequency of .1Hz?

2 answers:

6 0

We know,
Speed = Frequency * Wavelength
Speed = 3 * 0.1 m/s [hertz = 1/sec.]
So, your final answer is 0.3 m/s

Hope this helps!!

Akimi4 [234]3 years ago

6 0

The correct answer to the question is 0.3 m/s i.e the speed of the wave is 0.3 m/s.

CALCULATION:

As per the question, the wavelength of the wave is given as $\lambda=\ 3\ m.$

The frequency of the wave f = 0.1 Hz.

We are asked to calculate the speed [ V ] of the wave .

The relation among speed, frequency and wavelength of a wave is given as -

speed = frequency × wavelength

⇒ V = f × $\lambda$

= 3m × 0.1 Hz

= 0.3 m/s. [ans]

Hence, the speed of the wave will be 0.3 m/s.

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Light traveling through plate glass (n = 1.52) approaches the surface, i.e. the air-glass interface. What minimum incident angle

Ilia_Sergeevich [38]

Answer:

41°

Explanation:

refractive index of glass, n = 1.52

For total internal reflection, the angle of refraction in rarer medium is 90°.

r = 90°

Let the angle of refraction in denser medium, that means in glass is i.

By use of Snell's law

refractive index of rarer medium with respect to denser medium, that means refractive index of air with respect to glass = 1 / n

And

$\frac{1}{n}=\frac{Sin i}{Sin r}$

$\frac{1}{1.52}=\frac{Sin i}{Sin 90}$

$0.658= Sin i$

i = 41°

Thus, the angle of incidence should be 41°.

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3 years ago

What resource could run out thousands of years from now energy resourses

Sever21 [200]

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3 years ago

Imagine a third particle, which we will call a cyberon. It has three times the mass of an electron (3m). It has a positive charg

GalinKa [24]

Answer:

Explanation:

Let the potential difference between plate be V .

Electrical energy lost for cyberon = V x 3e

Kinetic energy lost by cyberon = kinetic energy gain by it

V x 3e = 1/2 x 3m x vc²

For electron , the above equation becomes

V x e = 1/2 x m x ve²

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3 years ago

A man pushes a 34 kg lawn mower using a handle inclined 45.0 ∘ from the horizontal. He pushes with 75 N directed along the handl

tresset_1 [31]

Answer:

333 N

Explanation:

The weight of an object is given by:

$W=mg$

where

m is the mass of the object

g is the acceleration of gravity

For the mower in the problem,

m = 34 kg

Also

$g=9.8 m/s^2$

So, the weight of the mower is

$W=(34)(9.8)=333 N$

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3 years ago

A student is doing an investigation into the masses of different materials of different densities.

Dmitrij [34]

Answer:

0.0118125 (kg)

Explanation:

mass = density x volume

First, find the volume of the cube as you're already given the density. You're also given the length of the cube, 1.5 cm. You need to convert this to m since the density's unit is kg/m^2

1.5cm x (1m/100cm) = 0.015m

Since Volume = (length)^3,

Volume of the cube = (0.015)^3

Volume of the cube = 3.375*10^-6

So mass of the cube = (3500)(3.375*10^-6) = 0.0118125 (kg)

5 0

3 years ago