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Phoenix [80]
3 years ago
12

A man travels 8,000 meters in 20 mins how fast is he going

Physics
1 answer:
Elden [556K]3 years ago
5 0
Speed = 8000m/20min = 400m/min

Convert meters/min to meters/second.
60seconds in 1minute:
400m/60sec = 6.67m/s

Speed is: 6.67m/s
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During which step of the scientific method does a scientist make an educated
lawyer [7]

Answer:

form a hypothesis

Explanation:

8 0
3 years ago
Two large metal plates of area 0.7 m2 face each other. They are 5.1 cm apart and have equal but opposite charges on their inner
german

Explanation:

The given data is as follows.

    Area (A) = 0.7 m^{2}.

  Electric field between the plates, (E) = 55 N/C

Since, electric field is related to surface charge density as follows.

          \sigma = \frac{Q}{A}

Also,    E = \frac{\sigma}{\epsilon_{o}}

or,        \sigma = \epsilon_{o} E

Therefore, charge will be calculated as follows.

          Q = \sigma \times A = \epsilon_{o} E \times A

             = 8.854 \times 10^{-12} \times 55 \times 0.7

             = 3.41 \times 10^{-10} C

             = 341 pC

Thus, we can conclude that magnitude of the charge on each plate is 341 pC.

8 0
4 years ago
Is there any change in mass of substance after it changes its state? Explain with an example​
Flura [38]

Answer:

No

Explanation:

When a substance changes its state , there will not be any change in the mass of substance . For example , if we change 100 grams of water (liquid) to ice(solid) , the mass of ice will be same i.e., 100 grams . This shows there is no change in the mass even if a substance changes its state.

MARK ME AS BRAINLIST

3 0
2 years ago
A copper sphere was moving at 25 m/s when it hit another object. this caused all of the ke to be converted into thermal energy f
muminat

ΔT= 81°C  was the increase in temperature.

<h3>steps</h3>

As evidenced by energy conservation

To increase its temperature, all of its kinetic energy will be converted to thermal energy.

\frac{1}{2}mv ^{2} = msΔT

then divide both sides by the object's mass.

\frac{1}{2} v^{2} =sΔT

therefore, a temperature shift is described as

ΔT= V^{2} /2s

ΔT= 25^{2}/ 2 x 387

ΔT= 81°C

ΔT= 81°C  was the increase in temperature.

learn more about increase in temperature here

<u>brainly.com/question/14319779</u>

#SPJ4

3 0
1 year ago
Which of the following is not an air pollutant?
Lelu [443]
Answer: 1. Carbon dioxide is not an air pollutant

Explanation: it can be toxic and or safe
7 0
2 years ago
Read 2 more answers
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