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Bess [88]
3 years ago
15

Is the angular acceleration of the second, minute, and hour hands the same? Pick the most accurate response. No. The hour hand h

as the largest angular acceleration. Need to know the length of each hand is to answer. Yes. The angular acceleration of each hand is zero. Yes. Each hand has the same non-zero angular acceleration. No. The minute hand has the largest angular acceleration No. The second hand has the largest angular acceleration.
Physics
1 answer:
trapecia [35]3 years ago
6 0

Answer:

No the second hand has the largest angular acceleration

Explanation:

angular velocity ω as the rate of change of an angle. In symbols, this is

ω=

Δθ / Δt

ω=Δθ / Δt, where an angular rotation Δθ takes place in a time Δt. The greater the rotation angle in a given amount of time, the greater the angular velocity. The units for angular velocity are radians per second (rad/s).

The second moves more faster than the minute and hour hand , which makes it have the highest angular velocity.

The angular acceleration is a = v / t

Where v = ωr

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A particle with charge 7.76×10^(−8)C is moving in a region where there is a uniform 0.700 T magnetic field in the +x-direction.
kodGreya [7K]

Answer:

The  z-component of the force is  \= F_z  =  0.00141 \ N    

Explanation:

From the question we are told that

          The charge on the particle is q =  7.76 *0^{-8} \  C    

           The magnitude of the magnetic field is  B =  0.700\r i \ T

            The  velocity of the particle toward the x-direction is  v_x  =  -1.68*10^{4}\r  i  \ m/s

           The  velocity of the particle toward the y-direction is

v_y  =  -2.61*10^{4}\ \r j  \ m/s

           The  velocity of the particle toward the z-direction is

v_y  =  -5.85*10^{4}\ \r k  \ m/s

Generally the force on this particle is mathematically represented as

          \= F  =  q (\= v   X  \= B )

So  we have    

          \= F  =  q ( v_x \r  i + v_y \r  j  +  v_z \r k  )  \ \ X \ (  \= B i)

         \= F  = q (v_y B(-\r  k) + v_z B\r j)      

  substituting values

       \= F  = (7.7 *10^{-8})([ (-2.61*10^{4}) (0.700)](-\r  z) + [(5.58*10^{4}) (0.700)]\r y)    

      \= F=  0.00303\ \r j +0.00141\ \r k                  

So the z-component of the force is  \= F_z  =  0.00141 \ N    

Note :  The  cross-multiplication template of unit vectors is  shown on the first uploaded image  ( From Wikibooks ).

7 0
4 years ago
Two long parallel wires carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the
zzz [600]

The magnetic field midway between the two wires is 5.0*10^{-7} T.

It is given that Two long parallel wires carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m.

We need to determine the magnetic field midway between the two wires.

A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials.

A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field.

Magnetic field is a place in space near a magnet or an electric current where a physical field is created from a moving electric charge that creates force on another moving electric charge.

B=B1+B2

=\frac{4\pi *10^{-7}*20 }{2\pi R1} +\frac{4\pi *10^{-7}*5 }{2\pi R2}

= \frac{4\pi *10^{-7}*20 }{2\pi *0.10} +\frac{4\pi *10^{-7}*5 }{2\pi *0.10}

= 5.0*10^{-7} T

Hence, the magnetic field midway between the two wires is 5.0*10^{-7} T

Learn more about magnetic field click here, brainly.com/question/14848188

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The ball is going Zero miles right before the player kicks it.
 
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Rina8888 [55]

Answer:

Explanation:

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B. Thermal energy is the energy that warms the earths surface.
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