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Nastasia [14]
2 years ago
8

Can someone help me with this? (The answer marked in red text is a incorrect answer)

Physics
1 answer:
Tju [1.3M]2 years ago
3 0

Answer:

the answer is A

Explanation:

because I just know

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7. Calculations.
kotykmax [81]

Answer:

5 ms-2

Explanation:

F = ma

F = 100N

m = 20kg ( you should make sure the unit is kg before you answer the question)

100 = 20a

a = 100÷ 20

a = 5 ms-2

4 0
3 years ago
A sound wave with a frequency of 400 Hz is moving through a solid object. If the wavelength of the sound wave is 8 m, what is th
Paraphin [41]

Answer:

v = 3200 m/s

Explanation:

As we know that the frequency of the sound wave is given as

f = 400 Hz

wavelength of the sound wave is given as

\lambda = 8 m

so now we have

speed = wavelength \times frequency

so we will have

v = (8m) \times (400 Hz)

v = 3200 m/s

4 0
3 years ago
Help on matching please, struggling on it. Even just 1 or 2 would help
n200080 [17]

Answer:

7. free fall -- h. 9.8m/s^2

3. Velocity -- x. 60 km/hr west

6. Acceleration -- d. change in velocity/time

8. Centrifugal --  s. towards the centre

13. Work done --w. Force * displacement

5. Uniform circular motion --j. spin cycle in washer

18. Power -- r. kW an hour

7. g -- a. 10N

hope this helps

6 0
2 years ago
a sample of a gaseous substance changes into liquid. This process is called (blank) and it takes place when heat is (blank) a ga
Delicious77 [7]
Process is called condensation and it happens when heat is removed from gaseous system.
8 0
3 years ago
The green bars are called "error bars." They indicate the range of uncertainty that scientists have about the data on the graph.
vovangra [49]

This graph shows data up to about 2010. So it couldn't have been drawn before 2010. OF COURSE the data from only 10 years earlier was more reliable than the data that was 120 years old ! It wasn't even measured the same way back then as it is now.

4 0
3 years ago
Read 2 more answers
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