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vazorg [7]
3 years ago
6

1600 AM broadcasts radio waves with wavelengths of about 187.37 m. Convert this to miles.

Physics
1 answer:
nikklg [1K]3 years ago
7 0

Answer:

The wavelength in miles is <u>0.1165 miles</u>.

Explanation:

Given:

Wavelength of the radio wave is 187.37 m.

Now, the wavelength is given in meters.

We need to convert the wavelength from meters to miles.

In order to convert meters to miles, we have to use their conversion factor.

We know that,

1 meter = \frac{1}{1609}\ miles

Therefore, the conversion factor is given as:

CF=\frac{1}{1609}\ miles\ per\ meter

So, the wavelength in miles is given as:

Wavelength=\textrm{Wavelength in meters}\times CF\\\\Wavelength=187.37\ m\times \frac{\frac{1}{1609}\ miles}{1\ m}\\\\Wavelength=\frac{187.37}{1609}\ miles\\\\Wavelength=0.1165\ miles

Hence, the wavelength in miles is 0.1165 miles.

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The most energy-efficient way to send a spacecraft to the Moon is to boost its speed while it is in circular orbit about the Ear
jeyben [28]

Answer:

98.33 %

Explanation:

On an elliptical orbit, angular momentum will be conserved .

Angular momentum = I ω = mvR

So mv₁R₁ = mv₂R₂

= v₁R₁ = v₂R₂

where v₁ is velocity and R₁ radius in low orbit (perigee)and v₂ and R₂ is velocity and radius in high orbit ( apogee ).

Here R₁ = Radius of the earth , R₂ is distance between moon and earth.

R₁ / R₂ = 1/60

v₁ /v₂ = R₂ / R₁  = 60

v₂ / v₁ = 1 / 60

1 - (v₂ / v₁ ) = 1 -( 1 / 60)

(v₁ -v₂)/v₁ = ( 60-1 )/60

(v₁ -v₂)/v₁ x 100 = 5900/60 = 98.33 %

5 0
4 years ago
Label each statement according to whether it refers to AC, DC, both, or neither.a. The current is always constant in these types
umka21 [38]

Answer:

1 DC

2 DC

3 DC

4 AC

5 DC

Explanation:

AC means alternating current this type of current is not constant I.e time varying

This type of current is being supplied from power lines

DC means direct current and flows at a constant direction. This type of current is being supplied from batteries.

7 0
3 years ago
A block moves up a 30 degree incline under the action of three applied forces. F1 is horizontal and of magnitude 40 N. F2 is nor
Alja [10]

Answer

given,

F₁ is horizontal = 40 N

F₂ is normal = 20 N

F₃ is parallel = 30 N

work done by

W₂ = 0 as force is acting perpendicular to the direction of motion.

as the motion moved to 0.8 cm

W₃ = F₃ x d

W₃ = 30 x 0.8

W₃ = 24 J

W₁ = F₁ x d

W₁ = F₁ cos ∅ x d

W₁ = 40 cos 30⁰ x 0.8

W₁ = 27.21 J

4 0
3 years ago
Suppose that the metal cylinder in the last problem has a mass of 0.10 kg and the coefficient of static friction between the sur
andrew11 [14]

Answer:

The speed maximum speed is 0.49ms^{-1}

Explanation:

The centrifugal force always acts on the cylinder and move away the rotating platform from the  rotational axis. so the centripetal force provide by the frictional force:

Therefore

\frac{mv^{2} }{r} =u_{s} mg        

coefficient of static friction: u_{s} =0.12

mass of the cylinder: m=0.10kg\

distance of the cylinder from the turntable: r=0.20m

\frac{mv^{2} }{r} =u_{s} mg

cross multiply to find v

v^{2} =u_{s} rg\\v=\sqrt{u_{s}rg }  \\v=\sqrt{0.12*0.20*9.80}\\ v=0.49m/s

4 0
3 years ago
Read 2 more answers
Observe the figure below. The dashed red line with diamond symbols represents the monthly mean values, centered on the middle of
ddd [48]
You are correct in your thinking 
hope this helps
6 0
3 years ago
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