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elena-s [515]
2 years ago
10

Is science based off observations? Explain how observations are important to your experiment.

Physics
2 answers:
VLD [36.1K]2 years ago
6 0

Answer:

Observation is essential in science. Scientists use observation to collect and record data, which enables them to construct and then test hypotheses and theories. Scientists observe in many ways – with their own senses or with tools such as microscopes, scanners or transmitters to extend their vision or hearing. These tools allow for more precise and accurate observations. Scientists also use equipment to measure things like radiation or pH – phenomena not directly observable.

Explanation:

Eduardwww [97]2 years ago
6 0

Answer:

Scientists use observation to collect and record data, which enables them to construct and then test hypotheses and theories. Scientists observe in many ways – with their own senses or with tools such as microscopes, scanners or transmitters to extend their vision or hearing. These tools allow for more precise and accurate observations. Scientists also use equipment to measure things like radiation or pH – phenomena not directly observable.

Explanation:

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A piston–cylinder assembly fitted with a slowly rotating paddle wheel contains 0.13 kg of air, initially at 300 K. The air under
olganol [36]

Answer:

Explanation:

From the first law of thermodynamics

Q=ΔU+W

Q=heat supplies to the system

ΔU=change in internal energy of the system

W= work done by the gas  by the system

Q =12 KJ

ΔU=U_{2} -U_{1}=(mR/k-1)ΔT

ΔU=\frac{0.3*0.287}{1.4-1}*(460-400)

     =14.924 KJ

Q=ΔU+W

W=-2.924 KJ

W_{net}=W_{air}+W_{paddle}

W_{air}=work done by the air

W_{air}= P(V2-V1)

W_{air}=mRT2-mRT1

W_{air}=mR(T2-T1)=0.138*0.287*(460-300)=

                           =6.33 KJ

W_{net}=W_{air}+W_{paddle}

                      =-2.924-6.33

W_{paddle}=-9.26  KJ                    

7 0
4 years ago
A car moving with an initial speed v collides with a second stationary car that is one-half as massive. After the collision the
Mashutka [201]

Answer:

4v/3

Explanation:

Assume elastic collision by the law of momentum conservation:

m_1v = m_1v_1 + m_2v_2

where v is the original speed of car 1, v1 is the final speed of car 1 and v2 is final speed of car 2. m1 and m2 are masses of car 1 and car 2, respectively

Substitute m_2 = m_1/2 \& v_1 = v/3

m_1v = \frac{m_1v}{3} + \frac{m_1v_2}{2}

Divide both side by m_1, then multiply by 6 we have

6v = 2v + 3v_2

3v_2 = 4v

v_2 = \frac{4v}{3}

So the final speed of the second car is 4/3 of the first car original speed

5 0
3 years ago
Is popcorn a object
dybincka [34]
Yes,it’s an object because it’s solid I think...
4 0
3 years ago
What causes the different colors of visible light in the electromagnetic spectrum?
liraira [26]

Answer:

The color of the light is determined by the frequency of the light wave. Red, is lowest, frequency and violet is the highest.

5 0
4 years ago
How is sound produced ​
Dafna11 [192]

Sounds are created when something vibrates (shakes back and forth), sending waves of vibrations into the ears of the listener. When a bell is struck, the metal vibrates. The vibrations travel through the air as sound waves.

hope this helps

7 0
2 years ago
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