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Tresset [83]
3 years ago
10

If a planet's orbital speed is 20 km/s when it's at its average distance from the sun which is most likely orbital speed when it

is nearest the sun?
Physics
1 answer:
Alona [7]3 years ago
8 0

Answer:25km/s

Explanation:

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An airplane flies with a constant speed of 720 km/hr. How long will it take to travel a distance of 1440 km? Please show your wo
choli [55]

Answer:

2 h

Explanation:

Velocity =Distance/time ⇒ time = distance/speed

                                                     = 1440/720

                                                     = 2 h

6 0
3 years ago
A sound-producing object is moving toward an observer. The sound the observer hears will have a frequency ___ that actually bein
Readme [11.4K]
The answer is <span>higher than.
</span><span>A sound-producing object is moving toward an observer. The sound the observer hears will have a frequency higher than that actually being produced by the object.

Why?
</span>As the source of the waves is moving toward the observer, each of the successive wave crest<span> is emitted from a position closer to the observer than the previous wave.
Thus each wave takes slightly less time to reach the observer than the previous wave. So, the time between the arrival of successive wave crests at the observer is reduced, increasing the frequency. </span>
5 0
4 years ago
Read 2 more answers
Convert 6.95×105 cal to joules. recall that 1 cal=duncan takes a break from studying and goes to the gym to swim laps. if swimmi
quester [9]
For this problem, let's use the approach of dimensional analysis. This technique is done by cancelling out like units that appear both on the numerator and the denominator side. As a result, this technique will let you know that your final answer conforms to what parameter is asked. In this case, the final answer should be in kJ. We use the conversion: 1000 cal = 4.184 kJ The solution is as follows:

<span>6.95×10</span>⁵<span> cal * 4.184 kJ/1000 cal = 2,907.88 kJ</span>
3 0
4 years ago
Which disadvantage of nuclear power use poses the greatest threat to the environment?
Mekhanik [1.2K]

The correct answer is The storage and management of radioactive wastes

Explanation:

In general, nuclear reactions (changes in the nucleus of an atom such as fission) release a lot of energy including a lot of heat. Moreover, this heat is used by humans to obtain electricity and other types of energy, which is known as a nuclear power. This type of power is considered positive because it does not emit carbon and it is quite efficient.

However, in most cases, it is a threat to the environment and living beings because storing and managing the wastes of this type of power is difficult and expensive. Indeed, dealing with the wastes of nuclear power requires complex infrastructure, and any accident or leaking leads to serious consequences from the death of those exposed to the wastes to permanent loss of diversity or changes in nearby areas.

6 0
3 years ago
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What are the four factors that determine weather?
garik1379 [7]
Solar Radiation, Orbital Distance, Air Pressure, and the Abundance of water.
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