1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
zhuklara [117]
3 years ago
7

The waves in a ripple tank are moving toward a barrier gap that is 1/2 the wavelength. A and B are equidistant from the gap. Sel

ect the correct statements about the diffraction that occurs.
1. Both A and B will encounter waves.
2. Only A will encounter waves.
3. Only B will encounter waves.
4. Waves will reach B more quickly than A.
5. Waves will reach A more quickly than B.
6. Waves will reach A and B at the same time.
Physics
2 answers:
kotegsom [21]3 years ago
6 0

Answer:  The correct statements about the diffraction are 1 and 6.

Explanation:    

Diffraction is the spreading of the wave from the gap in the barrier. If the wavelength increases then the diffraction also increases or it decreases with decrease in wavelength.

In the given problem, the waves in a ripple tank are moving toward a barrier gap that is 1/2 the wavelength. A and B are equidistant from the gap.

In the case of the waves in a ripple tank case, the diffraction is observed when the barrier is placed in a ripple tank. The path of water waves are observed when the they encounter the obstacles.  

The waves transmit energy in all direction then the waves will reach A and B at the same time.

Therefore, both A and B will encounter waves. Waves will reach A and B at the same time.

Romashka-Z-Leto [24]3 years ago
3 0
Diffraction is the spreading of a wave from a gap.

The statements that are true about diffraction in the case above are;

<span>1. Both A and B will encounter waves. and
</span><span>6. Waves will reach A and B at the same time.</span>
You might be interested in
For years, the tallest tower in the United States was the Phoenix Shot Tower in Baltimore, Maryland. The shot tower was used fro
serious [3.7K]

Answer:

The answer to your question is:

a) t = 3.81 s

b) vf =  37.4 m/s

Explanation:

Data

height = 71.3 m = 234 feet

t = 0 m/s

vf = ?

vo = 0 m/s

Formula

h = vot + 1/2gt²

vf = vo + gt

Process

a)

               h = vot + 1/2gt²

             71.3 = 0t + 1/2(9.81)t²

             2(71.3) = 9,81t²

              t² = 2(71.3)/9.81

              t² = 14.53

              t = 3.81 s

b)

      vf = 0 + (9.81)(3.81)

      vf = 37.4 m/s

3 0
3 years ago
Two particles, with charges of 20.0 nC and -20.0 nC, are fixed at points with coordinates &lt;0, 4.00 cm&gt; and &lt;0, -4.00 cm
Dmitry [639]

Answer:

Explanation:

Potential energy of the system of charges

=  9 x 10⁹ x [  q₁q₂ / r₁₂ +  q₂q₃ / r₂₃ +  q₁q₃ / r₁₃ ]

here  r₁₂ ,  r₂₃ , r₁₃ are distance between 1 st and 2 nd charge , 2 nd and 3 rd charge and fist and third charge.

r₁₂ = 8 cm , r₂₃ = 4 cm , r₁₃ = 4 cm.

q₁ = 20 x 10⁻⁹ C , q₂ = - 20 x 10⁻⁹ C , q₃ = 10 x 10⁻⁹ C

Potential energy  =  9 x 10⁹ x [ - 400 x 10⁻¹⁸ / .08  +  -200x10⁻¹⁸ / .04 +  200 x 10¹⁸ / .04 ]

= 9 x 10⁹  x  - 400 x 10⁻¹⁸ / .08

= 45 x 10⁻⁶ J .

b)

Potential at the point of fourth charge due to three charges of 20 nC , - 20 nC and 10 nC at the centre

9 x 10⁹ [ 20 x 10⁻⁹ / .05 + - 20 x 10⁻⁹ / .05 + 10 x 10⁻⁹ / .03 ]

= 9 x 10⁹ x 10 x 10⁻⁹ / .03

= 3000 V .

potential energy of fourth particle = charge x potential

= 3000 x 40 x 10⁻⁹ = 12 x 10⁻⁵ J .

kinetic energy at infinity = 12 x 10⁻⁵ J

1/2 m v² = 12 x 10⁻⁵ J

.5 x 2 x 10⁻¹³ x v² = 12 x 10⁻⁵

v² = 12 x 10⁸

v = 3.46 x 10⁴ m/s

= 9 x 10⁹

5 0
3 years ago
Why does helium have more spectral lines than hydrogen?
Lynna [10]

<span>This is because Helium has two valence electrons compared to Hydrogen which has only one. Helium has more energy levels for an electron to jump thus more spectral lines to occur. The spectral lines relating to each change of energy level would be more grouped together and hence the greater chance of them falling in the visible range.</span>

8 0
3 years ago
Three materials, put them in order of what
Grace [21]

Answer:

it's a

Explanation:

hope this helps!!!!!!

4 0
3 years ago
5. If one object has a greater speed than a second object. does the first necessarily have a greater acceleration? Explain, usin
Sveta_85 [38]

Answer:

Explanation:

5. not necessarily so that the first object could have left with initial velocity and the second not, so even if the second has a greater acceleration its velocity is less than that of the first

6. The acceleration of the motorcycle is

     SI System Reductions

     Vo = 80 km / h (1000m / 1km) (1h / 3600s) = 22.2 m / s

     Vf = 90 km / h (1000m / 1km) (1h / 3600s) = 25 m / s

     Vf = Vo + at at = Vf-Vo

     am = (Vf-Vo) / t

     am = (25 -22.2) / t = 2.8 / t

      am= 2.8/t

For the bike we have

      Vf = 10 km / h (1000m / 1km) (1h / 3600s) = 2.78 m / s

      Vo = 0

      ab = (Vf -Vo) / t

      ab = (2.78 -0) / t

      ab = 2.8/t

Since time is the same for both of us, if we round to Significant figures the two accelerations are equal

7. If when an object is slowing or slowing down.

     For example, a car goes north and must stop at the traffic light, the acceleration of the brakes goes south

8. Yes, since an object can go to the left and the acceleration to the right, but the object will lose speed over time

9. in the launch of projectiles the acceleration is negative and the speed after half the path is also negative

10. Car B must be moving to car A, because if they leave together B has more acceleration, bone that travels the distance at the same time

11. When we have friction, the velocity of an object increases by an external force, but the friction also increases the acceleration, but since it is positive, the velocity increases until the acceleration is zero and hence the velocity remains constant.

8 0
3 years ago
Other questions:
  • Determine whether each substance will sink or float in corn syrup, which has a density of 1.36 g/cm3. Write “sink” or “float” in
    11·2 answers
  • The force of gravity is the strongest of the four known force fields. True False
    14·2 answers
  • QUESTION 20
    14·1 answer
  • At high noon, the sun delivers 1150 w to each square meter of a blacktop road. if the hot asphalt loses energy only by radiation
    7·1 answer
  • What is the answer to 17 ‐ 12× ‐ 18 ‐ 5×
    15·1 answer
  • How is wave movement affected by the various mediums it may travel through?
    8·1 answer
  • Where is the near point of an eye for which a contact lens with a power of +2.55 diopters is prescribed?Where is the far point o
    14·1 answer
  • Name some applications of white surfaces.
    9·2 answers
  • Kinetic Energy HELP! Brainly included
    14·1 answer
  • B. A bird in air looks a fish vertically below it inside the water from a distance 5m from surface of water and fish lies at dep
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!