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Sophie [7]
3 years ago
6

Which forms first: protoplanets or planetesimals?

Physics
1 answer:
kenny6666 [7]3 years ago
6 0
A planetesimal is small bodies from which a planet originated in the early stages of formation of the solar system. Protoplanets are when planetesimals join together through collisions and through the force of gravity to form larger bodies.

Therefore, planetesimals are formed first.
You might be interested in
you ride a bike for 2 hours at 25 km/hr then 3 hours at 34 km/hr. what is your average velocity (in km/hr)?
mamaluj [8]
<h3>Answer:</h3>

30.4 km/hr

<h3>Explanation:</h3>

<u>We are given</u>;

  • Speed in the first 2 hours as 25 km/hr
  • Speed in the next 3 hours as 34 km/hr

We are required to determine the average velocity in km/hr

  • To get the average velocity we divide total distance by total time.
  • Thus, we need to determine the total distance

Distance = Speed × time

Distance covered in the first 2 hours;

               = 25 km/hr × 2 hours

               = 50 km

Distance in the next 3 hours

                = 34 km/hr × 3 hours

                = 102 km

Therefore, total distance = 50 km + 102 km

                                        = 152 km

Total time = 2 hrs + 3 hrs

                = 5 hours

Therefore;

Average speed = 152 km ÷ 5 hours

                          = 30.4 km/hr

Thus, the average speed is 30.4 km/hr

4 0
3 years ago
HELPPPPPPPP!!!!! PLZZZ
Gennadij [26K]

Answer:

1- 31.25

2-?

3-?

Explanation:

6 0
3 years ago
Read 2 more answers
Help please! Thanks so much!
qaws [65]
You pretty much just have to convert and be mindful of significant figures.

5 km = 3 miles
0.3 cm = 0.12 in
4 0
3 years ago
A sample from of water is heated with 5000 J of energy and its temperature goes up by 6 K. What is the mass of the sample?
Dima020 [189]

Answer:

mass= 0.1993 kg

Explanation:

Using the formula c = Q / (mΔT)

8 0
2 years ago
Mrs. Fatima has a a small sports car that she uses to drop her kids off from school that has a mass of 5000 kg. Mr. Zaid drives
sertanlavr [38]

\textbf{Use equation of momentum}

p=mv

\text{momentum\ =\ mass x velocity}

\textbf{Substitute in the values}

5000 \times 75 = 375,000 \text{\ kg\ km/hr}

4200 \times 75 = 315,000 \text{\ kg\ km/hr}

\textbf{The\ small\ sports\ car\ will\ have\ the\ most\ momentum.}

4 0
2 years ago
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