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OverLord2011 [107]
3 years ago
6

Scientific laws and theories cannot change. They are absolute fact. True or false?

Physics
1 answer:
VladimirAG [237]3 years ago
3 0
The answer would be False, because theories change all the time.
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An object is moving east, and its velocity changes from 66 mvs to 26 mvs in 10 seconds. Which describes the
STALIN [3.7K]

Answer:

negative acceleration of 4m/s²

Explanation:

Given parameters:

Initial velocity  = 66m/s

Final velocity = 26m/s

Time taken = 10s

Unknown:

Description of the acceleration  = ?

Solution:

Acceleration is the rate of change of velocity with time.

It is mathematically expressed as;

    acceleration  = \frac{v - u}{t}

v is the final velocity

u is the initial velocity

t is the time taken

  Now insert the parameters and solve;

    Acceleration  = \frac{26 - 66}{10}   = -4m/s²

So, we see a negative acceleration of 4m/s²

6 0
3 years ago
When a burning stick of increase is moved fast in a circle a circle of red light is seen.​
anzhelika [568]

Answer:

The impression of the image on the retina lasts for about 1/16th of a second after the removal of the object. If a burning stick of incense is revolved at a rate of more than sixteen revolutions per second, we see a circle of red light due to persistence of vision.

Explanation:

7 0
3 years ago
Which scenario describes a systematic error?
Tamiku [17]

Answer:

The answer is C, a thermometer reads 0.1 degree higher than it should.

8 0
4 years ago
Elizabeth had heart surgery to repair the pacemaker of her heart. Into which structure did the surgeon need access?
blsea [12.9K]

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SA Node is where the surgeon needed access

4 0
3 years ago
Two acrobats flying through the air grab and hold onto each other in midair as part of a circus act.One acrobat has a mass of 60
earnstyle [38]

Answer:

1.36m/s

Explanation:

We are given that

Mass of one acrobat,m_1=60 kg

Mass of another acrobat,m_2=50 kg

v_2=-3 m/s

v_1=5 m/s

We have to find their  velocity immediately after they grab  onto each other.

The collision between two acrobat is inelastic

According to law of conservation of momentum

m_1v_1+m_2v_2=(m_1+m_2)V

Substitute the values

60\times 5+50(-3)=(60+50)V

300-150=110V

V=\frac{300-150}{110}=1.36m/s

4 0
3 years ago
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