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Kazeer [188]
3 years ago
6

I need help someone answer, thanks!

Physics
2 answers:
Sonja [21]3 years ago
5 0

Answer:

The third one.

Explanation:

fhfztdgjkhhi

alisha [4.7K]3 years ago
3 0

Answer:

3rd one

Explanation:

Because the drum vibrates in a way that produces <u>compression waves. </u> The other options provide other waves, or no waves at all.

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What is the difference between sounds that have the same pitch and loudness?
eduard
Sounds that have the same pitch and loudness can be differentiated by intensity and tone.
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3 years ago
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A laser beam strikes a plane's surface with an angle of52.
Vadim26 [7]

Answer:

Angle between incident ray and reflected ray will be 104°

Explanation:

We have given angle of incidence = 52 °

From law of reflection angle of incidence will be equal to angle of reflection

So angle of reflection will be also 52°

We have to find the angle between incident ray and reflected ray

As the incidence angle and reflected angle both is from normal of the surface and opposite to each other

So angle between incident ray and reflected ray will be 52°+52° = 104°

7 0
4 years ago
Refer to the figure for this question: Four particles form a square. the charges are q1=q4=Q and q2=q3=q. (Part A) What is Q/q i
nikitadnepr [17]
Draw a vector diagram. The net force on particle 1 = F12 + F13 + F14 These forces have to be added as vectors. 
We will resolve our forces along the direction 1-4 F12 (tot) = -kQq / a^2 in the direction of particle 4 F12 = -kQq *sin (45) / a^2 F12 = -kQq /( a^2 * sqrt(2) ) 
By symetry this is the same as F13 F13 = -kQq /( a^2 * sqrt(2) ) 
F14 = -kQQ / (Sqrt(2)*a) ^ 2 
For net force on particle 1 : 
F12+F13+F14 = 0 -2kQq /( a^2 * sqrt(2) ) + -kQQ / (Sqrt(2)*a) ^ 2 = 0 
Some simple manipulation should give you : 
Q/q = -2 sqrt(2) 
4 0
3 years ago
Read 2 more answers
1. An electron (Q=16x10^-20 C, m=1x10^-30 kg) moving at half a megameter per second up the page enters a region with a uniform m
jek_recluse [69]

Explanation:

It is given that,

Charge on electron, q=16\times 10^{-20}\ C

Mass of the electron, m=9.1\times 10^{-31}\ kg  

Speed of the electron, v=0.5\ Mm/s=0.5\times 10^6\ m/s            

Magnetic field, B = 1 T (directed out of the page)

Let F is the magnetic force acting on the electron. It is given by :

F=qvB\ sin\theta

Here, \theta=90^{\circ}

F=qvB    

F=16\times 10^{-20}\ C\times 0.5\times 10^6\ m/s\times 1\ T  

F=8\times 10^{-14}\ N

Using the right hand rule, the direction of magnetic force is upward to the plane of the paper. Also, the electron will follow the circular path.  It is given by :

r=\dfrac{mv}{qB}

r=\dfrac{9.1\times 10^{-31}\ kg\times 0.5\times 10^6\ m/s}{16\times 10^{-20}\ C\times 1\ T}

r=2.84\times 10^{-6}\ m

Hence, this is the required solution.                                    

7 0
3 years ago
Based on Newton’s First Law, what would you expect to happen to a block that is pushed across ice and begins moving (You may ass
Montano1993 [528]
An unbalanced force.
Newton's first law states that an object in motion will stay in motion until a unbalanced force acts upon it.
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3 years ago
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