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3 years ago

Longitudinal waves have _____.

Physics

2 answers:

tino4ka555 [31]3 years ago

7 0

<span>Longitudinal waves have _____.

</span>
<span>D. compressions and rarefactions </span>

Yakvenalex [24]3 years ago

6 0

I think its either C or D. I tried, couldn't figure the last part out. Hope this helped though!! Have a great day! :D

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Once potential energy is lost on a roller coaster it cannot be gained all the way back true or false

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Answer:

true

Explanation:

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2 years ago

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3 years ago

Read 2 more answers

A 7 kg object attached to a horizontal string moves with constant speed in a circle on a frictionless horizontal surface. The ki

Marizza181 [45]

Answer:

Explanation:

Given

mass of object $m=7 kg$

kinetic Energy $k=36\ J$

Tension in string $T=326\ N$

mass is moving in a horizontal circle so tension is providing the centripetal acceleration

therefore $T=\frac{mv^2}{r}----1$

where r=radius of circle

kinetic energy of particle $k=\frac{1}{2}mv^2----2$

divide 1 and 2 we get

$\frac{T}{k}=\frac{\frac{mv^2}{r}}{\frac{1}{2}mv^2}$

$\frac{T}{k}=\frac{2}{r}$

$r=\frac{2k}{T}=\frac{2\times 36}{326}$

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3 years ago

Two parallel copper rods supply power to a high-energy experiment, carrying the same current in opposite directions. The rods ar

mart [117]

Answer:

the maximum allowable current is 7302.967 amperl

Explanation:

The computation of the maximum allowable current is shown below;

Force F = mean ÷ 4π 2 I_1 I_2 ÷d × ΔL

200 N = (10)^-7 (2I × I) ÷ 0.08 × 1.5

200 = 3.75 × 10^-6 I^2

I = √200 ÷ √ 3.75 × 10^-6

= 7302.967 amperl

Hence, the maximum allowable current is 7302.967 amperl

Basically we applied the above formula

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3 years ago