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Zinaida [17]
3 years ago
15

Which characteristics can be used to differentiate star systems? Select three options

Physics
2 answers:
Veseljchak [2.6K]3 years ago
7 0

Answer: 1,3, and 4 on EDGE science just did the assignment

Explanation:

Lady bird [3.3K]3 years ago
5 0

Answer:

Explanation:

the answer is a,c,d because the stars are characterized by the color temperature, size, composition, and brightness

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I think its the last one, a student slips on the ice in front of school and sprains his ankle.  An example of a natural fiber could be cotton B.
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A cook removes a one-gallon pot of hot soup from a stove and places it in an ice-water bath to cool. which is the best cooling p
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I thank it is #2 or #1 hop this helps;)

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3 years ago
An airplane pilot wishes to fly due west. A wind of 80.0 km/h (about 50 mi/h) is blowing toward the south. (a) If the airspeed o
Vesnalui [34]

Answer:

a) 75.5 degree relative to the North in north-west direction

b) 309.84 km/h

Explanation:

a)If the pilot wants to fly due west while there's wind of 80km/h due south. The north-component of the airplane velocity relative to the air must be equal to the wind speed to the south, 80km/h in order to counter balance it

So the pilot should head to the West-North direction at an angle of

cos(\alpha) = 80/320 = 0.25

\alpha = cos^{-1}(0.25) = 1.32 rad = 180\frac{1.32}{\pi} = 75.5^0 relative to the North-bound.

b) As the North component of the airplane velocity cancel out the wind south-bound speed. The speed of the plane over the ground would be the West component of the airplane velocity, which is

320sin(\alpha) = 320sin(75.5^0) = 309.84 km/h

7 0
3 years ago
Read 2 more answers
Ultrasound with a frequency of 4.257 MHz can be used to produce images of the human body. If the speed of sound in the body is t
shutvik [7]

Answer:

2.49 * 10^(-4) m

Explanation:

Parameters given:

Frequency, f = 4.257 MHz = 4.257 * 10^6 Hz

Speed of sound in the body, v = 1.06 km/ = 1060 m/s

The speed of a wave is given as the product of its wavelength and frequency:

v = λf

Where λ = wavelength

This implies that:

λ = v/f

λ = (1060) / (4.257 * 10^6)

λ = 2.49 * 10^(-4) m

The wavelength of the sound in the body is 2.49 * 10^(-4) m.

4 0
3 years ago
We only see objects because they absorb light. <br> True or False?
Alenkasestr [34]

Answer:

true

Explanation:

i think it's true because I took a quiz on this

3 0
3 years ago
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