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Alexxandr [17]
2 years ago
7

If my indicater shows a oh of 12 would it be acidic ,alkalinic or nuetral​

Physics
1 answer:
AleksandrR [38]2 years ago
7 0

Explanation:

I m in debt in a country of a person trained and experienced and professional career of ur face except that's a nice weekend her to play with hf I m in English language learners are very much I love it and I m in a Haystack of a sqaure is a song called and said know if u r my name on my dic is used for u class of her send you an email doesn't matter if you do u know if I m in English dictionary is used to post again and I am from completed my homework Yara tune bhagat singh said on ur Wall Street no no I don't have any questions please contact us ☺️ and

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A string is stretched between a fixed support and a pulley a distance 111 cm apart. The tension on the string is controlled by a
kvv77 [185]

Answer:

88.8 m/s= Speed of wave propagation in the required mode.(3 loops)

Explanation:

When there are 3 loops.  

the total length = L = 3 λ /2

⇒ λ  = 2 L / 3 = 2 ( 1.11 ) / 3 = 0.74 m

Velocity = v = f λ = (120)(0.74) = 88.8 m/s

3 0
3 years ago
The electric motor of a model train accelerates the train from rest to 0.685 m/s in 21.5 ms. The total mass of the train is 875
Natali [406]

Answer:

P=9.58 W

Explanation:

According to Newton's second law, and assuming friction force as zero:

F_m=m.a\\F_m=0.875kg*a

The acceleration is given by:

a=\frac{\Delta v}{t}\\a=\frac{0.685m/s}{21.5*10^{-3}s}\\\\a=31.9m/s^2

So the force exerted  by the motor is:

F_m=0.875kg*31.9m/s^2\\F_m=27.9N

The work done by the motor is given by:

W_m=F_m*d\\\\d=\frac{1}{2}*a*t^2\\d=\frac{1}{2}*31.9m/s^2*(21.5*10^{-3}s)^2\\\\d=7.37*10^{-3}m

W_m=27.9N*7.37*10^{-3}m\\W_m=0.206J

And finally, the power is given by:

P=\frac{W_m}{t}\\P=\frac{0.206J}{21.5*10^{-3}s}\\\\P=9.58W

8 0
3 years ago
Please answer ASAP!!!!
RoseWind [281]
The answer is Ultraviolet
6 0
3 years ago
The valence electrons of metals are weakly attracted to the parent nuclei, so the electrons break free and float. The moving ele
siniylev [52]

The valence electrons of metals are weakly attracted to the parent nuclei, so the electrons break free and float. The moving electrons form a electron <u>negative</u> blanket that binds the atomic <u>positive</u> nuclei together, forming a metallic bond.

So the answers are <u>{ Negative }</u> and <u>{ Positive }.</u>  

Please vote Brainliest (:

5 0
3 years ago
Read 2 more answers
A hot brass plate is having its upper surface cooled by impinging jet of air at temperature of 15°c and convection heat transfer
Elodia [21]
200 degrees because I need the points
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3 years ago
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