Which of these has components that can have a varying ratio?

Neil A. Armstrong was the first person to walk on the moon. The distance between the earth and the moon is 3.85 × 108 m. Find th

Veseljchak [2.6K]

Answer:

a) Find the time it took for his voice to reach the earth via radio waves.

1.28s

b) Determine the minimum time that will be required for a message from Mars to reach the earth via radio waves.

186.6s

Explanation:

The electromagnetic spectrum is the distribution of radiation due to the different frequencies at which it radiates and its different intensities. That radiation is formed by electromagnetic waves, which are transverse waves formed by an electric field and a magnetic field perpendicular to it.

The distribution of the radiation in the electromagnetic spectrum is given in frequency, in the following order from the highest to the lower frequencies:

X-rays

Ultraviolet rays

Visible region

Infrared

Microwave

Radio waves

Light propagates as electromagnetic wave in vacuum with a speed of $3x10^{8}m/s$ . Therefore, radio waves will have the same speed in vacuum.

<em>a) Find the time it took for his voice to reach the earth via radio waves.</em>

Then, to know the time that it took for Neil A. Armstrong's voice to reach the Earth via radio waves from the Moon, the next equation can be used:

$c = \frac{d}{t}$ (1)

Where v is the speed of light, d is the distance and t is the time.

Notice that t can be isolated from equation 1.

$t = \frac{d}{c}$ (2)

$t = \frac{3.85x10^{8} m}{3x10^{8}m/s}$

$t = 1.28s$

Hence, it took 1.28 seconds for his voice to reach the Earth via radio waves from the Moon.

<em>(b) Determine the minimum time that will be required for a message from Mars to reach the earth via radio waves.</em>

For this part, the same approach described above will be used.

For this case, $d = 5.60x10^{10}m$

$t = \frac{d}{c}$

$t = \frac{5.60x10^{10}m}{3x10^{8}m/s}$

$t = 186.6s$

Hence, the minimum time that will be required for a message from Mars to reach the earth via radio waves is 186.6 seconds.

6 0

3 years ago

An ideal toroidal solenoid (Figure 1) has inner radius r1 = 15.1 cm and outer radius r2 = 18.3 cm. The solenoid has 180 turns an

Gemiola [76]

The solution for the three questions is mathematically given as

Parts A and C are both zeros.

Part B B = 0.001855Tesla

<h3>What is the magnitude of the magnetic field at 12.6 cm from the center of the torus?</h3>

Parts A and C are both zeros.

For component A, the magnetic field is zero since 12.6 cm is still inside the toroidal solenoid. Part C has no magnetic field since it is 20.7 cm outside of the toroidal solenoid.

Generally, the equation for magnetic field is mathematically given as

B = (mu_0*N*I)/(2*pi*r)

Therefore

B = ((4*pi*10^{-7})*180*8.40)/(2*pi*0.163)

B = 0.001855Tesla

In conclusion, the magnitude of the magnetic field at 16.3 cm from the center of the torus is

B = 0.001855Tesla

Read more about the magnetic field

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8 0

2 years ago

Read 2 more answers

Sunspots are _______ and _________ than the gases surrounding them.

Scrat [10]

The answer is B. darker; cooler
the dark spots give off less energy then the rest of the sun.

Hope this helps

3 0

4 years ago

Read 2 more answers

A bucket filled woth water seems light while it sinks into water.Also show their relation using formula

slavikrds [6]

Answer: This phenomenon happens due to upthrust exerted by water.

Explanation:

We know that,

Liquid Pressure is directly proportional to the height of the vertical column in the liquid.(P∝h)

When a bucket filled water is sunk into the water container, there occur difference in the pressure in top and bottom of the water container. Due to this, water exerts an upward force on the bucket filled with water. This is called Uprthrust.

Upthrust on the bucket makes the bucket filled with water lose some of it's weight and causes apparent loss in weight.

Hence, the bucket filled with water seems light while it sinks into water.

6 0

3 years ago

Pelicans tuck their wings and free-fall straight down whei} diving for fish. Suppose a pelican starts its dive from q height of

Dominik [7]

Answer:

3.3 m

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.81 m/s²

$v^2-u^2=2as\\\Rightarrow v=\sqrt{2as+u^2}\\\Rightarrow v=\sqrt{2\times 9.81\times 16+0^2}\\\Rightarrow v=17.72\ m/s$

$v=u+at\\\Rightarrow 17.72=0+9.81\times t\\\Rightarrow \frac{17.72}{9.81}=t\\\Rightarrow t=1.81 \s$

The fish needs to see the pelican before 0.2 seconds in order to escape so the time pelican has is 1.81-0.2=1.61 seconds

In that time the pelican would have traveled

$s=ut+\frac{1}{2}at^2\\\Rightarrow s=0\times 1.61+\frac{1}{2}\times 9.81\times 1.61^2\\\Rightarrow s=12.71\ m$

So, the pelican would be 16-12.71 = 3.3 m above the water.

6 0

3 years ago