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densk [106]
3 years ago
9

At which point is cool air circulating beneath warm air?

Physics
2 answers:
stepan [7]3 years ago
5 0

Answer:

1

Explanation:

Sveta_85 [38]3 years ago
5 0

Answer:

The answer is A

Explanation:

I took the quiz

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Two clay balls collide head-on in a perfectly inelastic collision. The first ball has a mass of 0.500 kg and an initial velocity
mrs_skeptik [129]

Answer:

v'=1.667\ m.s^{-1}  in the direction of the first body

Explanation:

Given:

  • mass of the first ball, m_1=0.5\ kg
  • velocity of the first ball, v_1=4\ m.s^{-1}
  • mass of the second ball, m_2=0.25\ kg
  • velocity of the second ball, v_2=3\ m.s^{-1}

<u>Now for the head-on inelastic collision:</u>

m_1.v_1-m_2.v_2=(m_1+m_2)v'

(since the bodies combine after an inelastic collision.)

0.5\times 4-0.25\times 3=(0.5+0.25)\times v'

v'=1.667\ m.s^{-1} in the direction of the first body. (Since the net result is positive as assumed in the equation for the first body)

4 0
3 years ago
Read 2 more answers
In which situation is no work being done? A. a person carrying a box from one place to another B. a person picking up a box from
tatiyna

Answer:

The answer is A

Explanation:

Being the force is acting upwards and displacement takes place horizontally

3 0
3 years ago
A laboratory dish, 20 cm in diameter, is half filled with water. One at a time, 0.49 μL drops of oil from a micropipette are dro
irakobra [83]

Explanation:

Formula for path difference is as follows.

             x = 2tn

and,     refractive index (n) = \frac{\lambda}{2t}

Thickness is calculated as follows.

           Thickness (t) = \frac{volume}{area}

       Area = \pi r^{2}

                = \pi \times (\frac{d}{2})^{2}

                = \frac{0.49 \times 10^{-6}}{3.14 \times 0.01 m}

                = 1.56 \times 10^{-8} m

Now, the refractive index will be calculated as follows.

For drop,      n = \frac{\lambda}{2t}

For B drop,    n = \frac{\lambda}{26t}

So,     n = \frac{640 \times 10^{-9}}{26 \times 1.56 \times 10^{-8}}

            = \frac{640 \times 10^{-9}}{40.56 \times 10^{-8}}

            = 1.5

Thus, we can conclude that index of refraction of the oil is 1.5.

6 0
3 years ago
What is an advantage of using pesticides?
svetlana [45]

Answer:

they help farmers produce more with less land

pesticides ensure bountiful harvesting

they help keep food affordable

8 0
3 years ago
Use a tick (V) for the correct statement and a cross (X) for the
victus00 [196]

Answer:

A is ✓,B is ×,C is ✓,D is ✓ and E is ×

6 0
3 years ago
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