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valkas [14]
3 years ago
14

A spacecraft has a momentum of 20,000 kg-m/s, and a mass of 250 kg. What is the magnitude of its velocity?

Physics
1 answer:
Harlamova29_29 [7]3 years ago
6 0

Answer:

<h2>A. 80 m/s </h2>

Explanation:

The velocity of the spacecraft can be found by using the formula

v =  \frac{p}{m}  \\

p is the momentum

m is the mass

From the question we have

v =  \frac{20000}{250}  =  \frac{2000}{25}  \\

We have the final answer as

<h3>80 m/s</h3>

Hope this helps you

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Yakvenalex [24]

Answer: The observed frequency is 518.6 Hz

Explanation:

By the Doppler Effect, we know that:

f' = ((v + v0)/(v - vs))*f

where f' is the perceived frequency.

v is the velocity of the wave, in this case 330m/s

v0 is the velocity of the receptor, in this case 0m/s

vs is the velocity of the source, in this case -50m/s (the minus sign is because it is coming thowards us)

f is the original frequency, f = 440hz.

then we have:

f' = 440hz*(330m/s)/(330m/s - 50m/s) = 518.6 Hz

7 0
3 years ago
Which of the following people came up with the term “hypnosis”?
vlabodo [156]
James braid came up with the term hypnosis
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3 years ago
The main offenders in terms of greenhouse gas emissions are?
Mandarinka [93]

The main offenders in terms of greenhouse gas emissions are Asia and Oceania.

<h3>Explanation</h3>

Greenhouse gases cause the greenhouse effect. The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide and ozone.

Asia is Earth's largest and most populous continent, located primarily in the Eastern and Northern Hemispheres. Whereas Oceania is a geographic region that includes Australasia, Melanesia, Micronesia and Polynesia.  

Asia includes: Bangladesh, China, India, Indonesia, Iraq, Mongolia, Philippines, Sri Lanka and Vietnam. Asia has three main financial centers: Hong Kong, Tokyo and Singapore.

Oceania countries are: Australia, Fiji, Kiribati, Marshall Islands, Micronesia, Nauru, New Zealand, Palau, Papua New Guinea, Samoa, Solomon Islands, Tonga, Tuvalu and Vanuatu

Currently, most of factories that exist in the world are established within Asian and Oceanian region because they have good supply of cheap labours. For example, China was initially one of the lowest labour cost countries known.  They produce the largest amount of pollutant which contain CO2 that contributed greatly to the greenhouse effects.

Hope it helps

<h3>Learn more</h3>
  1. Learn more about greenhouse  brainly.com/question/10172806
  2. Learn more about greenhouse gas emissions brainly.com/question/9105757
  3. Learn more about Oceania brainly.com/question/2236868

<h3>Answer details</h3>

Grade:  9

Subject:  physics

Chapter:  greenhouse

Keywords:  greenhouse gas emissions, greenhouse, offenders, Asia, Oceania

7 0
3 years ago
Read 2 more answers
A car is moving with speed 60 m/s and acceleration 4 m/s2 at a given instant. (a) using a second-degree taylor polynomial, estim
pantera1 [17]

Answer:

Explanation:

Using second degree taylor polynomials

let S(t) be position function and set S(0)=0

where S(0) is the initial position

Then v(t) = S^i(t) and a(t)=S^{ii}(t)

we have v(0) = 60m/s, a(0) = 4m/s^2

so T_{2}(t) =S(0)+v(0)t+\frac{a(0)}{2} t^2\\\\\\=0+60t+\frac{4}{2} t^2\\\\T_{2}(t)=60t+2t^2\\\\S(1)=T_{2}(1)=60+2=62m

b.) yes

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3 years ago
15. Use the chemical equation below to determine how many moles of ammonia
Anastaziya [24]

Answer:

I'm not really sure but I think it is

four

6 0
3 years ago
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