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Vlad1618 [11]
3 years ago
13

Scientific knowledge is both long lasting and open to change. In your own words, explain why scientific knowledge should be re-e

xamined and re-tested from time to time. Include two examples that will support your response.
Physics
1 answer:
Novay_Z [31]3 years ago
8 0
Scientific knowledge<span> is </span>both<span> durable and robust, but scientific knowledge is also </span>open<span> to </span>change. Because of the fact that it is<span> often examined and </span>re-examined by new investigations, scientific knowledge can change.N<span>ew discoveries are being made all the time.</span>
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Answer:

chromatography

Explanation:

Chromatography is one of the powerful technique that is used to separate the mixed components of liquid or the gas mixtures.

In this technique the separation of the mixture by passing the mixture in some solution or some suspension through the medium where the components are made to move at some different rates.

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Which factor causes the two balls to reach the ground at the same time
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A racing car travels with a constant tangential speed of 80.8 m/s around a circular track of radius 602 m. (a) Find the magnitud
KatRina [158]

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10.84 m/s2 radially inward

Explanation:

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6 0
4 years ago
A man works on a striaght road from his home to market 2.5km away dwith a speed of 5km/h.Finding the market closed, he instantly
umka21 [38]

Answer:

5.625km/h

Explanation:

We are given that

Distance between home and market, d=2.5 km

Speed, v1=5km/h

Speed, v2=7.5 km/h

We have to find the average speed of the man over the interval of time 0 to 40min.

Time,t=\frac{distance}{speed}

Using the formula

t_1=\frac{2.5}{5}=0.5 h=0.5\times 60=30 min

1 hour =60 min

t_2=\frac{2.5}{7.5}=\frac{1}{3}hour=\frac{60}{3}=20min

Distance traveled by man in 10 min with speed 7.5 km/h=\frac{2.5}{20}\times 10=2.5/2km

Therefore,

Total distance covered=2.5+2.5/2=3.75 km

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Average speed=\frac{3.75}{2/3}=5.625km/h

7 0
3 years ago
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