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tankabanditka [31]
1 year ago
9

4. If a 75 kg astronaut moves from Earth to Mars, how much weight did he lose?

Physics
1 answer:
zalisa [80]1 year ago
5 0
He doesn't lose weight he stays the same weight it's just gravity that changes
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A wave has a velocity of 24 m/s and a period of 3.0 s. Calculate the wavelength of the wave.
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Velocity (unit:m/s) of the wave is given with the formula:

v=f∧,

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f=1/T , where T is the period of the wave.

In our case: f=1/3

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3 years ago
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A diffraction grating with 600 lines/mmlines/mm is illuminated with light of wavelength 510 nmnm. A very wide viewing screen is
Ksenya-84 [330]

Answer:

A.2.95 m

B.7

Explanation:

We are given that

Diffraction grating=600 lines/mm

d=\frac{1 mm}{600}=\frac{1\times 10^{-3} m}{600}=1.67\times 10^{-6} m

Wavelength of light,\lambda=510 nm=510\times 10^{-9} m

l=4.6 m

A.We have to find the distance between the two m=1 bright fringes

sin\theta=\frac{m\lambda}{d}

For first bright fringe, =1

sin\theta=\frac{1\times 510\times 10^{-9}}{1.67\times 10^{-6}}=0.305

\theta=sin^{-1}(0.305)=17.76^{\circ}

The distance between two m=1 fringes

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Hence, the distance between two m=1 fringes=2.95 m

B.For maximum number of fringes,

sin\theta=1

sin\theta=\frac{m\lambda}{d}

Substitute the values

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m=\frac{1.67\times 10^{-6}}{510\times 10^{-9}}=3.3\approx 3

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Burka [1]
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