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2 years ago

15

The entire electromagnetic spectrum can be divided into seven bands: radio, microwave, infrared, visible, ultraviolet, X ray, an

d gamma ray (from longest to shortest wavelength). To which of these two bands is Earth's atmosphere the most transparent?

1 answer:

Akimi4 [234]2 years ago

8 0

The answer would be visible and radio

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Differences Between light year and astronomical unit in two points .

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A light year is the distance light travels in a year. ... And an astronomical unit is the average distance between the earth and the sun. So the distance to the sun is by definition one AU. A parsec is the distance at which one astronomical unit subtends an angle of one second of arc.

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A car is moving at a constant speed of 100 miles per hour. how long does it take for the car to travel 200 miles.

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d. 2 hours

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2 years ago

In a closed system, a cart with a mass of 1.5 kg is rolling to the right at 1.4 m/s, while another cart of mass 1.0 kg is rollin

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Answer: The correct option is (c.).

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Mass of the cart A= 1.5 kg

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Mass of the cart B = 1.0 kg

Velocity of Cart B = 1.4 m/s towards left

Momentum (P)= Mass × Velocity

$P_A=1.5 kg\times 1.4 m/s=2.1 kg m/s$

$P_B=1.0 kg\times (-1.4m/s)=-1.4 kg m/s$

(Negative sign means velocity of the cart is in opposite direction of that of the cart A)

Total Momentum = $P_A+P_B=2.10 kg m/s-1.40 kg m/s=0.70 kg m/s$

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