NaOH + FeCl3* Na Cl + Fe 10H)3<br> balanced

Which term describes the movement of an object under the influence of gravity without air resistance

Ainat [17]

The term that describes the movement of an object under the influence of gravity without air resistance is free fall

5 0

3 years ago

Describe the difference between red light and blue light.

Anettt [7]

Answer:

Red light has longer wavelength, while blue light has higher frequency

Explanation:

Red light and blue light corresponds to two different portion of the visible part of the electromagnetic spectrum.

The two colors have different wavelengths - more precisely:

Blue: 450 - 500 nm

Red: 620 - 750 nm

So, we see that red light has a longer wavelength than blue light.

Moreover, the frequency of an electromagnetic wave, f, is inversely proportional to the wavelength, $\lambda$ :

$f=\frac{c}{\lambda}$

where c is the speed of light. This means that blue light, which has a shorter wavelength, has a higher frequency than red light.

8 0

3 years ago

Two charge spears are 20 cm apart and extract an attractive force of 8x10^-9 N on each other. Which will be the force of attract

Talja [164]

Answer:

3.2 × 10⁻⁸ N.

Explanation:

By Coulomb's Law, the magnitude of the electromagnetic force between two point charges is inversely proportional to the square of their separation, $r$ . In other words,

$\displaystyle \frac{F_1}{F_2} = {\left(\frac{r_2}{r_1}\right)}^{2}$ .

Initial electromagnetic force $F_1 = 8\times 10^{-9}\;\text{N}$ ;
Initial Separation $r_1 = 20\;\text{cm}$ ;
Final Separation $r_2 = 10\;\text{cm}$ .

Final electromagnetic force:

$\displaystyle F_2 = F_1 \cdot \left(\frac{r_2}{r_1}\right)^{2} = 8\times 10^{-9}\times \left( \frac{20}{10}\right)^{2} = 3.2\times 10^{-8}\;\text{N}$ .

4 0

4 years ago

A lumberjack (mass = 103 kg) is standing at rest on one end of a floating log (mass = 277 kg) that is also at rest. The lumberja

Lorico [155]

Answer:

Explanation:

Given

mass of lumber jack $m_L=1000 kg$

mass of floating log $m_f=277 kg$

velocity of lumber jack =3.74 m/s (w.r.t. shore)

conserving momentum

Initial momentum=Final momentum

$0=m_L\times 3.74+m_f\times v$

$v=-\frac{1000\times 3.74}{277}$

$v=-13.501 m/s$

(b)For second Log

Conserving Momentum

Initial momentum of log and Lumber jack=Final momentum of log and lumberjack

$m_L\times 3.74=(m_L+m_f)u$

u is final velocity of lumberjack and log

$u=\frac{m_L}{m_L+m_f}\times 3.74$

$u=\frac{1000}{1000+277}=2.92 m/s$

5 0

4 years ago

What is the density of a block with a mass of 36 g and a volume of 9 cm3?.

pshichka [43]

Density= how much mass is in a certain volume
Therefore, you do (mass/volume).
density of the block is
36g/9cm3
or
4g/cm3
Meaning that there is 4 grams of mass in each cm3.

3 0

4 years ago

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NaOH + FeCl3* Na Cl + Fe 10H)3 balanced