4 years ago

Which are examples of convection currents ? Select three options.

2 answers:

6 0

Answer: A hot air balloon rising and falling in the atmosphere, a radiator that emits warm air and draws in cool air, and rice moving in a pot of water that is being heated. :)

Ksivusya [100]4 years ago

5 0

Answer:

c e and d

Explanation:

i did the test

You might be interested in

Avogadro‘s number was calculated by determining The number of atoms in

Lady_Fox [76]

Answer:

12 grams of the isotope carbon-12.

Explanation:

hope it helps you and give me a brainliest

7 0

2 years ago

A book has a mass of 5 lb what is the mass of the book kg

OverLord2011 [107]

The mass of the Book is 2.27 kg.

6 0

3 years ago

a races car travels on a circular track at an average rate of 125mi/h the radius of fhe track is 0.320 miles what is that centri

Sholpan [36]

390.625
I hope this helps

6 0

3 years ago

Why does light refract when it encounters the glass in a lens?

Ber [7]

The answer is C, because it hits a dense medium, which causes it to bounce off.

Hope I helped. :)

8 0

3 years ago

Read 2 more answers

A pipe that is open at both ends has a fundamental frequency of 320 Hz when the speed of sound in air is 331 m/s.

fenix001 [56]

Question

What is the length of the pipe?

Answer:

(a) 0.52m

(b) f2=640 Hz and f3=960 Hz

Explanation:

For an open pipe, the velocity is given by

$v=\frac {2Lf}{n}$

Making L the subject then

$L=\frac {nV}{2f}$

Where f is the frequency, L is the length, n is harmonic number, v is velocity

Substituting 1 for n, 320 Hz for f and 331 m/s for v then

$L=\frac {1*331}{2*320}=0.5171875\approx 0.52m$

(b)

The next two harmonics is given by

f2=2fi

f3=3fi

f2=3*320=640 Hz

f3=3*320=960 Hz

Alternatively, $f2=2\times \frac {v}{2L}$ and $f3=3\times \frac {v}{2L}$

$f2=2\times \frac {331}{2*0.52}=636.5 Hz\\f3=3\times \frac {331}{2*0.52}=954.8 Hz$

(c)

When v=367 m/s then

$f1= \frac {v}{2L}\\f1= \frac {367}{2*0.52}=352.9 Hz$

5 0

3 years ago