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enot [183]
3 years ago
11

Which of the following is not a subatomic particle?

Physics
1 answer:
Fynjy0 [20]3 years ago
7 0
D. Nucleus because it is not a part of the group.
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You are given the speed of a wave and it's period. What kind of information can you also find out about this wave?
ozzi
Its frequency because you already found out its speed & period 
5 0
3 years ago
Light traveling from water to a gemstone strikes the surface at an angle of 80.0º and has an angle of refraction of 15.2º . (a)
7nadin3 [17]

Answer:

a

The the speed of light in the gemstone is  v= 0.599*10^8 m/s

b

The unreasonable thing about this is that the speed of ligth in the gemstone is too low

the speed is 19% of the speed of light  which is very low

c

One main unreasonable or inconsistent factor is that the assumption that the  differnce between the angle of incidence and angle of refraction is  very large

Explanation:

  From the question we are told that

       The  angle of incidence  i = 80^o

        The angle of refraction  r = 15.2^o

From Snell's law we have ,

      n_1 sin \theta_1 = n_2 sin \theta_2

    Where n_1 is the refractive index of the first medium (water) with a constant value  of  n_1 = 1..333

                n_2  is the refractive index of the second medium (gem stone)

                 \theta_1 is the angle between  the beam and perpendicular surface of the first medium

               \theta_2  is the angle  between the beam an the perpendicular surface of the second medium

      Making  the n_2 the subject of the formula

                       n_2 = n_1 \frac{sin \theta_1}{sin \theta_2}

                           = (1.333)(\frac{sin (80.0)}{sin  15.2} )

                           = 5.007

 Generally refractive index of a material  is mathematically represented

                      n = \frac{c}{v}

 Where c is the speed light

               v is the speed of light  observed in a medium

 Making v the subject

            v = \frac{c}{n}

 substituting value for gem stone

          v  =  \frac{3.0*10^8}{5.007}

              v= 0.599*10^8 m/s

     

               

7 0
3 years ago
Please help me with physics ks3!! Sound waves and hearding (pic incl)
Nina [5.8K]
Your answers for a), b), and c) are correct.  Good work !

d). The high noise levels in Technology and PE are more of
a concern to the teachers than to the students because the
students are only in there for 1 or 2 periods a day, but the
Technology and PE teachers are in there ALL day.

e).  Mr. Jones can't hear as high frequency as Jenny can because
he is much older than Jenny is.  Sadly, even without damage due to
loud noise, the ability to hear high frequencies does decrease with age.

f).  The wooden surfaces in the gym cause the gym to be louder
than it would be if it had carpet on the floor.  Carpet ... and soft
walls and ceilings ... absorb a lot of the sound that hits them. 
But hard surfaces don't absorb much of the sound that hits them,
so it just keeps bouncing around until it finally fades away. 

You can see this easily ... just go into the gym at your school, clap
your hands once, and notice how long you keep hearing the sound
after you clap. 
7 0
3 years ago
Read 2 more answers
What is apparent magnitude and what can affect it?
Montano1993 [528]
Apparent magnitude means how bright a star APPEARS to us on Earth. It can be affected by ...

... how bright the star really is
... how far the star is from us
... how much gas and dust is between us
... how much of the star's total output is in visible light
8 0
3 years ago
7) The acceleration due to gravity near the surface of Mars is about one-third of the value
Doss [256]

Answer:

C) three times slow than on earth

8 0
3 years ago
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