Question

please tell the answer of these
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Answer 1

Answer:

Given

Speed = 440 m/s

Frequency = 220 Hz

To Find

Wavelength

Solution

We know that

\red{\sf \longrightarrow \lambda=\dfrac{v}{n}}⟶λ=

n

v

Here

\sf \lambdaλ = Wavelength

\sf vv = Speed

\sf nn = Frequency

Units

\sf \lambdaλ = metre (m)

\sf vv = metre per second (m/s)

\sf nn = Hertz (Hz)

According to the question

We are asked to find wavelength

Therefore

We must find "\sf \lambdaλ "

Given that

Speed = 440 m/s

Frequency = 220 Hz

Hence

\sf vv = 440 m/s

\sf nn = 220 Hz

Substituting the values

We get

\orange{\sf \lambda=\dfrac{440}{220} \ m}λ=

220

440

m

Therefore

\pink{\sf \lambda=2 \ m}λ=2 m

Hence

Wavelength = 2 m

Answer 2

$\fbox\purple{Answer}$

Option D

As per the given pattern in question figure , we can find the similar next position of given dice .

Here 2 and 3 numbers faces are at the same side .

From the two different views of the dice it is clear that ‘6’ lies opposite to ‘5’.