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TiliK225 [7]
1 year ago
9

A book rests on a wooden table is an example of

Physics
1 answer:
kykrilka [37]1 year ago
7 0

Answer:

Static friction

Explanation:

When there is contact between two surfaces and there is no movement, there is static friction. So, if we have a book that rests on a wooden table, we have an example of Static friction, where this force avoids the movement of the book.

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Provide two ways that objects can become charged
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Answer:

friction, conduction and induction

Explanation:

Had it in class I had it correct hope this helps.

8 0
3 years ago
The speed of light is about 3.00 × 10 meters per second. What is the frequency of green light that has a wavelength about 500 na
RideAnS [48]

Answer:

The frequency of the green light is 6x10^{14}Hz

Explanation:

The visible region is part of the electromagnetic spectrum, any radiation of that electromagnetic spectrum has a speed of 3.00x10^{8}m/s in the vacuum.

Green light is part of the visible region. Therefore, the frequency can be determined by the following equation:

c = \lambda \cdot \nu  (1)

Where c is the speed of light, \lambda is the wavelength and \nu is the frequency.  

Notice that since it is electromagnetic radiation, equation 1 can be used. Remember that light propagates in the form of an electromagnetic wave (that is a magnetic field perpendicular to an electric field).

Then, \nu can be isolated from equation 1

\nu = \frac{c}{\lambda}  (2)

Notice that it is necessary to express the wavelength in units of meters.  

\lambda = 500nm . \frac{1m}{1x10^{9}nm} ⇒ 5x10^{-7}m

\nu = \frac{3.00x10^{8}m/s}{5x10^{-7}m}

\nu = 6x10^{14}s^{-1}  

\nu = 6x10^{14}Hz  

Hence, the frequency of the green light is 6x10^{14}Hz

4 0
4 years ago
If a swimmer pushes off a pool wall with a force of 250n, what is her acceleration.
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Her acceleration is

           (250) divided by (the swimmer's mass, in kilograms).

The unit is " meters per second² " .

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3 years ago
Select the statement that best describes how the forces relate. A. All forces begin equally and become varied. B. The object on
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Electromagnetic and Gravitational forces are most alike because their range is not limited. 
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4 years ago
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Answer:

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Heat transfer by convection happens through the air, and there are millions of minuscule air spaces between the fibers. Heat transfer by radiation is also slow since one fiber must radiate its heat to another.

When we give heat then kinetic energy is increase and this heat is transferred from hot metal to cold metal through this free electrons. As in insulator the free electrons are negligible so that the heat is not transferred from hot junction to cold junction due to absence of this free electrons.

Explanation:

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2 years ago
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