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Stels [109]
3 years ago
15

The light bulb converts electrical energy into light and ____. A) chemical B) electromagnetic C) heat D) nuclear

Physics
2 answers:
morpeh [17]3 years ago
7 0
The light bulb converts electrical energy into light and heat. 


Good luck! (:
FinnZ [79.3K]3 years ago
5 0
The correct answer will be C
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If a sound waves frequency is 100Hz. what is its period
agasfer [191]

Period = (1/frequency) .

If frequency is 100 per second, then

     Period = (1) / (100 per second)  =  0.01 second .

4 0
3 years ago
A 49.3 g ball of copper has a net charge of 2.0 µc. what fraction of the copper's electrons has been removed? (each copper atom
Serggg [28]
First, find how many copper atoms make up the ball: 
 moles of atoms = (49.3 g) / (63.5 g per mol of atoms) = 0.<span>77638</span><span>mol 
</span> # of atoms = (0.77638 mol) (6.02 × 10^23 atoms per mol) = 4.6738*10^23<span> atoms </span>

<span> There is normally one electron for every proton in copper. This means there are normally 29 electrons per atom:
</span> normal # electrons = (4.6738 × 10^23 atoms) (29 electrons per atom) = <span> <span>1.3554</span></span><span>× 10^25 electrons 
</span>
<span> Currently, the charge in the ball is 2.0 µC, which means -2.0 µC worth of electrons have been removed.
</span><span> # removed electrons = (-2.0 µC) / (1.602 × 10^-13 µC per electron) = 1.2484 × 10^13 electrons removed
 
</span><span> # removed electrons / normal # electrons = </span>
<span>(1.2484 × 10^13 electrons removed) / (1.3554 × 10^25 electrons) = 9.21 × 10^-13 </span>

<span> That's 1 / 9.21 × 10^13 </span>
7 0
3 years ago
What is the cause of most waves and how can this change waves' characteristics?
Tanzania [10]

There are three main factors that affect wave formation: wind velocity, fetch, and duration.

Waves are most commonly caused by wind. Wind-driven waves, or surface waves, are created by the friction between wind and surface water. As wind blows across the surface of the ocean or a lake, the continual disturbance creates a wave crest.

8 0
2 years ago
Read 2 more answers
A compact disc rotates from rest up to an angular speed of 31.4 rad/s in a time of 0.892 s.
Serggg [28]

Answer:

(a)  α = 35.20 rad/s^2

(b)  θ = 802°

(c)   v = 139.73 cm/s

(d)   a = 156.64 cm/s^2

Explanation:

(a) To find the angular acceleration of the disc you use the following formula:

\alpha=\frac{\omega-\omega_o}{t}         (1)

w: angular speed of the disc = 31.4 rad/s

wo: initial angular speed = 0 rad/s

t: time = 0.892s

You replace the values of the parameters in the equation (1):

\alpha=\frac{31.4rad/s-0rad/s}{0.892s}=35.20\frac{rad}{s^2}

The angular acceleration of the disc, for the given time, is 35.20rad/s^2

(b) To calculate the angle describe by the disc in such a time you use:

\theta=\frac{1}{2}\alpha t^2         (2)

\theta=\frac{1}{2}(35.20rad/s^2)(0.892s)^2=14.00rad

In degrees you have:

\theta=14.00rad*\frac{180\°}{\pi \ rad}=802\°

The angle described by the disc is 802°

(c) To calculate the tangential speed of the microbe for t=0.892s, you use the following formula:

v=\omega r         (3)

w: angular speed for t = 0.892s = 31.4rad/s

r: radius of the disc = 4.45cm

v=(31.4rad/s)(4.45cm)=139.73\frac{cm}{s}

The tangential speed is 139.73 cm/s

(d) The tangential acceleration is calculated by using the following formula:

a=\alpha r

α: angular acceleration for t=0.892s

a=(35.20rad/s^2)(4.45cm)=156.64\frac{cm}{s^2}

The tangential acceleration is 156.64cm/s^2

7 0
3 years ago
Drop a paper a piece of thermocol and a piece of plastic from a height of 10 to 15 feet not the time for each object to hit the
lisov135 [29]

Answer:

Explanation:

According to Newton's law of gravitation , all objects should take same time to fall from same height , but it does not happen when we see a paper , a thermocol and a plastic paper to fall .

It happens due to air resistance . In case of paper , this is most pronounced , so it falls slowest . In case of plastic paper , the resistance is least so it falls fastest .

If we squeeze the piece of paper to make a lump so that it does not remain flat , it will fall the fastest , because in this case the air resistance on it becomes the least .

4 0
2 years ago
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