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Naya [18.7K]
3 years ago
14

How did astronomers precisely determine the length of an Astronomical Unit in the 1960s?

Physics
1 answer:
zaharov [31]3 years ago
5 0

Answer:

Use of telemetry and radar astronomy

Explanation:

An astronomical Unit (AU) is a unit of measuring distances in outer space, which is based on the approximate distance between the earth and the Sun.

After several years of trying to approximate the distance between the Sun and the Earth using several methods based on geometry and some other calculations, advancements in technology made available the presence of special motoring equipment, which can be placed in outer space to remotely monitor and measure the position of the sun.

The use of direct radar measurements to the sun (radar astronomy) have also made the determination of the AU more accurate.

A standard radar pulse of known speed is sent to the Sun, and the time with which it takes to return is measured,  once this is recorded, the distance between the Earth and the Sun can be calculated using

distance = speed X time.

However, most of these means have to be corrected for parallax errors

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3 years ago
As a capacitor is being charged in an RC circuit. the current flowing through a resistor isa) increasingb) decreasingc) constant
Montano1993 [528]
<h2>Answer: decreasing</h2>

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<h2>When a capacitor is being charged in an RC circuit, the current flowing through a resistor <u>decreases</u>.</h2>

And the correct option is b.

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which of the following laboratory tool would be most appropiate for measuring the approximate volume of a liquid?
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7 0
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If you can throw a stone straight up to height h, what’s the maximum horizontal distance you could throw it over level ground?
Mariana [72]
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8 0
3 years ago
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Help please I will mark you the brainly!
Fudgin [204]

D)

Explanation:

Coz the position changes with time but the position change is not constant throughout time So, D) does not have constant velocity

3 0
2 years ago
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