Which letter would be compression of a longitudinal wave?

How is energy wasted by the radio

Rama09 [41]

Chemical and kinetic energy...

6 0

2 years ago

34000×0.4 ---------------- 0.02×200 In scientific notation

VashaNatasha [74]

Answer:

the simplified expression is written as 3.4 x 10³

Explanation:

Given expression;

$\frac{34000\times 0.4}{0.02 \times 200}$

in scientific notation, the expression is simplified as;

$\frac{34000\times 0.4}{0.02 \times 200} = \frac{13600}{4} = 3400 = 3.4 \times 10^3$

Therefore, in scientific notation, the simplified expression is written as 3.4 x 10³

4 0

2 years ago

true or false refraction occurs when the amplitude of a wave changes as it goes from one medium to aother

KiRa [710]

The answer here is true

4 0

2 years ago

If a material were being designed to demonstrate no thermal expansions, how would the energy plot look like?

bixtya [17]

The characteristics of thermal expansion allow finding that the response for a material without thermal expansion is

The length variation is zero

In the graph the line is horizontal so there is no change in length with temperature

Thermal expansion is the macroscopic sum of the changes in the length of the bonds when the energy (temperature) changes, it can be written

ΔL = α L₀ ΔT

Where ΔL is the change in length, α the coefficient of linear expansion, L₀ the initial length and ΔT the change in body temperature

In this case, a material is being designed that the thermal expansion is very small, for this the material must be made up of several compounds where some of them present a contraction with temperature, some examples: water at low temperature, liquefied gases , ceramic tile, quartz, etc.

The thermal expansion measurement processes control the body temperature and measure the change in length, in this case the change in length must be zero, in the attachment we can see a graph of a composite material with these characteristics, an example of this type of material is Invar an alloy of nickel and iron α = 3.7 10⁻⁶ ºC⁻¹

In conclusion, using the characteristics of thermal expansion we can find that the response of material without thermal expansion is