3 years ago

How do changes in light wavelengths support the big bang theory?

2 answers:

5 0

Lights from other galaxies shifts toward the red end of the spectrum, which shows that the galaxies are moving away from the earth. (A)

likoan [24]3 years ago

5 0

Answer: A

Explanation:

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A ball is thrown straight upward. When it has reached the highest point in its motion, and is momentarily stopped, its accelerat

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Increased .....................

7 0

3 years ago

A plane wave with a wavelength of 500 nm is incident normally ona single slit with a width of 5.0 × 10–6 m.Consider waves that r

kaheart [24]

To solve this exercise it is necessary to use the concepts related to Difference in Phase.

The Difference in phase is given by

$\Phi = \frac{2\pi \delta}{\lambda}$

Where

$\delta =$ Horizontal distance between two points

$\lambda =$ Wavelength

From our values we have,

$\lambda = 500nm = 5*10^{-6}m$

$\theta = 1\°$

The horizontal distance between this two points would be given for

$\delta = dsin\theta$

Therefore using the equation we have

$\Phi = \frac{2\pi \delta}{\lambda}$

$\Phi = \frac{2\pi(dsin\theta)}{\lambda}$

$\Phi = \frac{2\pi(5*!0^{-6}sin(1))}{500*10^{-9}}$

$\Phi= 1.096 rad \approx = 1.1 rad$

Therefore the correct answer is C.

6 0

3 years ago

A 100 mH inductor whose windings have a resistance of 6.0 Ω is connected across a 12 Vbattery having an internal resistance of 3

Alexus [3.1K]

Answer:

The store energy in the inductor is 0.088 J

Explanation:

Given that,

Inductor = 100 mH

Resistance = 6.0 Ω

Voltage = 12 V

Internal resistance = 3.0 Ω

We need to calculate the current

Using ohm's law

$V = IR$

$I=\dfrac{V}{R+r}$

Put the value into the formula

$I=\dfrac{12}{6.0+3.0}$

$I=1.33\ A$

We need to calculate the store energy in the inductor

$U=\dfrac{1}{2}LI^2$

$U=\dfrac{1}{2}\times100\times10^{-3}\times(1.33)^2$

$U=0.088\ J$

Hence, The store energy in the inductor is 0.088 J

7 0

3 years ago

Different between current and electrons?

BlackZzzverrR [31]

Answer:

Simply,

electrons are "PARTICLES" orbiting the atoms, where, current is the FLOW of some (free-to-move-around) electrons in a wire...

3 0

3 years ago

a star has a distance of 30 parsecs and a apparent magnitude of 3 --what would its absolute magnitude be?

Alborosie

The absolute magnitude of the star would be +5.

8 0

1 year ago