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3 years ago

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In these formulas, it is useful to understand which variables are parameters that specify the nature of the wave. The variables

E0E0E_0 and B0B0B_0 are the __________ of the electric and magnetic fields. Choose the best answer to fill in the blank.

1 answer:

Juli2301 [7.4K]3 years ago

7 0

They made me do it I don’t even know what to say I’m so sorry

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A fisherman's scale stretches 3.7 cm when a 3.5 kg fish hangs from it. (a) what is the spring constant? n/m (b) what will be the

Karo-lina-s [1.5K]

(a) the weight of the fish is:
$W=mg=(3.5 kg)(9.81 m/s^2)=34.3 N$
and this is the force that stretches the spring by $x=3.7 cm=0.037 m$ . So, we can use Hook's law to find the constant of the spring:
$k= \frac{F}{x}= \frac{34.3 N}{0.037 m}=927.0 N/m$

(b) The fish is pulled down by 2.8 cm = 0.028 m more, so now the total stretch of the spring is
$x'=3.7 cm+2.8 cm=6.5 cm$
But this is also the amplitude of the new oscillation, because this is the maximum extension the spring can get, so A=6.5 cm.

The angular frequency of oscillation is given by:
$\omega= \sqrt{ \frac{k}{m} }= \sqrt{ \frac{927.0 N/m}{3.5 kg} }=16.3 Hz$
and so the frequency is given by
$f= \frac{\omega}{2 \pi} = \frac{16.3 Hz}{2 \pi}=2.6 Hz$

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3 years ago

100 POINTSSSS PLEASE HELP

lara31 [8.8K]

Wood, wind, sunshine,geothermal energy, biomass and water

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3 years ago

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Momentum of the 2 kg mass moving with velocity 10 m/s is *

gulaghasi [49]

20 kg*m/s because there is 2 kg mass and 10 m/s so you can multiply.

8 0

3 years ago

When forming a bond, an atom that has 3 electrons in its second shell and a filled first shell will?

Butoxors [25]

Macromolecule polymers are assembled by the connecting of monomers. An -OH group is detached from one monomer and a hydrogen atom is detached from an additional in a procedure named dehydration synthesis in the monomers bond. For every subunit supplementary to a macromolecule in which one water molecule is detached. Macromolecule polymers are broken down by breaking bonds among subunits. This procedure is named hydrolysis and is the opposite of dehydration. During hydrolysis the hydrogen atom is supplementary to one monomer and a hydroxyl cluster to the other and by breaking the covalent bond in the middle of the monomers.

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3 years ago

A 360-nm thick oil film floats on the surface of a pool of water. the indices of refraction of the oil and the water are 1.5 and

jenyasd209 [6]

The correct answer is 432, and 720.
The thickness of a film is t= 360nm
the refractive index of oil n₀t = (m +1/2) λ
For m =0
λ = 4n₀t
= 4(1.50)(360)
= 2160nm
for m = 1
λ = 4n₀t
= 4(1.50)(360)/3
= 720nm
m = 2
λ = 4n₀t/5 = 4(1.50)(360)/5
= 432nm
The wavelength which are most strongly reflected are
432nm, 720nm.

7 0

3 years ago