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3 years ago

Which is not a correct way to measure wavelength?

Physics

2 answers:

Monica [59]3 years ago

7 0

from rarefaction to rarefaction for a longitudinal wave

Simora [160]3 years ago

6 0

Rarefaction is the correct way

You might be interested in

. The inner and outer surfaces of a 4-m × 7-m brick wall of thickness 30 cm and thermal conductivity 0.69 W/m-K are maintained a

Anni [7]

Answer:

$\frac{dQ}{dt} = 966 W$

Explanation:

As we know that the rate of heat transfer due to temperature difference is given by the formula

$\frac{dQ}{dt} = \frac{KA(\Delta T)}{L}$

here we know that

$K = 0.69 W/m-K$

A = 4 m x 7 m

thickness = 30 cm

temperature difference is given as

$\Delta T = 20 - 5 = 15 ^oC$

now we have

$\frac{dQ}{dt} = \frac{(0.69W/m-K)(28 m^2)(15)}{0.30}$

$\frac{dQ}{dt} = 966 W$

4 0

3 years ago

Two identical balls are thrown vertically upward. The second ball is thrown with an initial speed that is twice that of the firs

9966 [12]

Answer:

The maximum height of ball 2 is 4 times that of ball 1

Explanation:

We can find the maximum height of each ball by using the following suvat equation:

$v^2-u^2=2as$

where

v is the final velocity

u is the initial velocity

$a=g=-9.8 m/s^2$ is the acceleration of gravity (we take upward as positive direction)

s is the displacement

At the maximum height, s = h and v = 0 (the final velocity is zero), so re-arranging the equation:

$h=\frac{-u^2}{2g}$

The first ball is thrown with initial velocity $u_1$ , so it reaches a maximum height of

$h_1 = -\frac{u_1^2}{2g}$ (the quantity will be positive, since g is negative)

The second ball is thrown with initial velocity

$u_2 = u_1$

so it will reach a maximum height of

$h_2 = - \frac{u_2^2}{2g}=-\frac{(2u_1)^2}{2g}=4(-\frac{u_1^2}{2g}) = 4h_1$

So, its maximum height will be 4 times the maximum height reached by ball 1.

8 0

3 years ago

Calculate the total energy of 4.0 kg object moving horizontally at 20 m/s 50 meters above the surface.

Serhud [2]

Answer:

Correct answer: E total = 2,800 J

Explanation:

Given:

m = 4 kg the mass of the object

V = 20 m/s the speed (velocity) of the object

H = 50 m the height of the object above the surface

E total = ? J

The total energy of an object is equal to the sum of potential and kinetic energy

E total = Ep + Ek

Ep = m g H we take g = 10 m/s²

Ep = 4 · 10 · 50 = 2,000 J

Ek = m V² / 2

Ek = 4 · 20² / 2 = 2 · 400 = 800 J

E total = 2,000 + 800 = 2,800 J

E total = 2,800 J

God is with you!!!

4 0

3 years ago

What happens to the standing wave frequencies if you quadruple the tension in the string?

kramer

Answer:

. A standing wave on a string (fixed at both ends) has a fundamental frequency f. If you quadruple the tension in the string, how can you change the length of the string so that the fundamental frequency remains the same? ... double the length.

8 0

3 years ago

What wave makes the particles in a medium move paralell to the direction that the wave travels

Svetllana [295]

Longitudinal and transverse

7 0

4 years ago