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hram777 [196]
3 years ago
7

Quentin made a table to summarize uses of electromagnetic waves. Which should he write in the “Use” section for X-rays? music br

oadcasts luggage inspections night-vision goggles digital photographs
Physics
2 answers:
Sliva [168]3 years ago
8 0
'Luggage inspection' is the answer
MissTica3 years ago
6 0

luggage inspections

Explanation:

X-rays are electromagnetic waves with very short wavelength (0.01 to 10 nanometers) and very high frequency.

X-rays main property is that they are able to pass through many materials but they are reflected back by metals. For this reason, they can be used for luggage inspections: in fact, the X-rays are able to pass through the luggage, but they are reflected back if they met metals along their path, so they can be used to identify metal objects inside the luggages at the airport, for example.

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The distance from earth to mars ranges between 780,000,000 km and 380,000,000 km depending on the time of the year. The speed of
ivann1987 [24]

Answer:

The minimum time, t = 21.11 m

Explanation:

Given,

The maximum distance between the Earth and Mars, d = 780,000,000 km

The maximum distance between the Earth and Mars, d = 780,000,000 km

The speed of the light, c = 300,000 km/s

The distance and speed of the object is related using the formula,

                           v = d / t

                            t = d / v

The minimum time it takes for data transmission is when the distance between the Mars and the Earth is at minimum.

Therefore,

                            t = 380,000,000 km / 300,000 km/s

                              = 1266.67 s

                              = 21.11 minutes

Hence, the minimum time it takes for data transmitted by the Mars Surveyor to reach earth, t = 21.11 minutes

6 0
3 years ago
A source emits sound with a frequency of 860 Hz. It is moving at 20.0 m/s toward a stationary reflecting wall. If the speed of s
Galina-37 [17]

Answer:

f_o=860\ Hz

Explanation:

Given:

  • original frequency of sound wave, f=860\ Hz
  • speed of the sound source, v_s=20\ m.s^{-1}
  • original speed of sound wave from the source, s=343\ m.s^{-1}

<u>According to the Doppler's effect:</u>

\frac{f_s}{f_o} =\frac{s+v_s}{s-v_o}

The sound is reflected from the wall and the source is moving towards the wall and observer is also riding the same source.

The velocity of the observer, v_o=-20\ m.s^{-1}

\frac{860}{f_o} =\frac{s+20}{s-(-20)}

f_o=860\ Hz

3 0
3 years ago
Read 2 more answers
Contrast the force of gravity between these pairs of objects a 1 kg mass and a 2 kg mass that are 1 m apart and two 2 kg masses
Yuki888 [10]

Solution

Force between pair of objects of masses 1kg and 2kg that are 1m apart is given as

F=G\times \frac{1\times 2}{1^2}

here G is gravitational constant

G=6.674\times10^{-11}Nm^2kg^{-2}

therefore,

F=6.674\times10^{-11}Nm^2kg^{-2}\times 2

F=13.348\times10^{-11}Nm^2kg^{-2}

similarly Force between pair of objects of masses 2kg each that are 1m apart is given as

F'=G\times \frac{2\times 2}{1^2}

F'=6.674\times10^{-11}Nm^2kg^{-2}\times 4

F'=2\times 13.348\times10^{-11}Nm^2kg^{-2}

or F'=2F

it means  Force between pair of objects of masses 2kg each that are 1m apart is equal to twice the Force between pair of objects of masses 1kg and 2kg that are 1m

7 0
3 years ago
Study the image below. What interaction causes the water to spread as they pass through the rock opening?
Kamila [148]
I think is diffracton.
7 0
3 years ago
Read 2 more answers
What state of matter is it that it starts at a liquid then loses energy during the change of state
miv72 [106K]
Well, if the substance started as a liquid, lost energy, and changed state, then it's in the SOLID state right now.
4 0
3 years ago
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