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3 years ago

What is scientific inquiry? Who can use it and what does it involve?

1 answer:

muminat3 years ago

8 0

A scientific inquiry is a form of studies that scientist use to help form an answer. A scientific inquiry involves asking questions, making hypotheses, making observations, analyzing, and testing the object.

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A radio wave has a frequency of 4.40 × 108 hz. what is the energy (in j) of one photon of this radiation? enter your answer in s

LiRa [457]

The energy of a single photon is given by
$E=hf$
where
$h=6.6 \cdot 10^{-34} Js$ is the Planck constant
f is the frequency of the wave (of the photon)

In our problem, the radio wave has a frequency of $f=4.40 \cdot 10^8 Hz$ , so if we put this value into the previous formula, we can find the energy of a single photon of this electromagnetic wave:
$E=hf=(6.6 \cdot 10^{-34} Js)(4.40 \cdot 10^8 Hz)=2.9 \cdot 10^{-25} J$

7 0

3 years ago

The force between two charges when they are 2 cm apart is

mixer [17]

Answer:

$q_1=9.9998\mu C$ and $q_2=0.0002\mu C$

$q_1=0.00016\mu C$ and $q_2=9.99984\mu C$

Explanation:

We are given that

Force between two charges=0.036 N= $36\times 10^{-3}N$

Distance between two charges, r=2cm= $2\times 10^{-2}$ m

1m=100cm

Sum of two charges= $10\mu C$

Let one charge= $q_1=q\mu C=q\times 10^{-6}C$

$q_2=(10-q)\times 10^{-6} C$

We know that

Electric force between two charges

$F=\frac{kq_1q_2}{r^2}$

Where $k=\frac{1}{4\pi \epsilon_0}=9\times 10^{9}$

Using the formula

$36\times 10^{-3}=9\times 10^{9}\times \frac{q\times 10^{-6}\times(10-q)\times 10^{-6}}{(2\times 10^{-2})^2}$

$\frac{144\times 10^{-7}}{9\times 10^{9}\times 10^{-12}}=q(10-q)$

$0.0016=10q-q^2$

$q^2-10q+0.0016=0$

$10000q^2-100000q+16=0$

$q=\frac{100000\pm\sqrt{(100000)^2-4\times 10000\times 16}}{2\times 10000}$

Using the formula

$x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

$q=9.999$ and $q=0.00016$

$q_2=10-9.9998=0.0002$

$q_2=10-0.00016=9.99984$

Hence, two charges are

$q_1=9.9998\mu C$ and $q_2=0.0002\mu C$

$q_1=0.00016\mu C$ and $q_2=9.99984\mu C$

5 0

3 years ago

Imagine pulling clothes out of a dryer as soon as they are dry. It is possible to grab a dry shirt right away, but the zipper on

gayaneshka [121]

Even though all materials are at the same temperature when they come out of the dryer, some like the zipper are far better conductors of heat and can burn you. Cloth is not a good conductor of heat.

5 0

3 years ago

A device that has the capacity to receive and store electrical energy is a(n)

Scilla [17]

Capacitor is, I think.

4 0

3 years ago

What would be the Elastic Potential Energy (EPE) stored in a spring with a constant k = 200 N/m that is pulled to stretch 0.45m?

harkovskaia [24]

Answer:

During the summer, oxygen is supplied by surface winds. M/NPT 16 to 26 0.14 to 0.45 m 1/ 77.80 $ 28 Phone: 418 81-1 Fax: 418 81-2882 SZ5-2025 SZ22-200 SZ2-250 SZ24-00 12.5 x 60 12.5 x 60 12.5 x 60 8 x 10 10 x 15 10 x 20 15 x HI-950 can take measures between 0.1 C to 999.9 C/ F. K, J & T-type: The HI-9551

(Hope this is what you're asking for)

Hope this helps Have a good day

3 0

3 years ago