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Alex17521 [72]
4 years ago
13

Which has frequency below the audible range? (a) Ultrasonic (b) Supersonic (c) Infrasonic (d) All of these

Physics
1 answer:
EastWind [94]4 years ago
8 0

Answer:

option (c)

Explanation:

The frequency ranges for infrasonic is below 20 Hz.

The frequency ranges for audible is 20 Hz to 20000 Hz.

The frequency ranges for ultrasonic is above 20000 Hz.

So, infrasonic have frequency below the audible range. We cannot hear this frequency.

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Complete the statements using data from Table A of your Student Guide. The speed of the cart after 8 seconds of Low fan speed is
finlep [7]

Answer:

The speed of the cart after 8 seconds of Low fan speed is  72.0 cm/s

The speed of the cart after 3 seconds of Medium fan speed is   36.0 cm/s

The speed of the cart after 6 seconds of High fan speed is  96.0 cm/s

Explanation:

took the test on edgenuity

4 0
3 years ago
Read 2 more answers
The potential in a region between x = 0 and x = 6.00 m is V = a + bx, where a = 10.6 V and b = -4.90 V/m. (a) Determine the pote
cestrela7 [59]

Answer:

a) 10.6V

b) E = 4.9V/m, +x direction

c) E = 4.9V/m, +x direction

Explanation:

You have the following function:

V=a+bx  (1)

for the potential in a region between x=0 and x=6.00 m

a = 10.6 V

b = -4.90V/m

V=10.6V-4.90\frac{V}{m}x

a) for x=0 you obtain for V:

V=10.6V-4.90\frac{V}{m}(0m)=10.6V

b) The relation between the potential difference and the electric field can be written as:

E=-\frac{dV}{dx}=-b=-(-4.9V/m)=4.9V/m  (2)

the direction is +x

c) The electric field is the same for any value of x between x=0 and x=6m.

Hence,

E = 4.9V/m, +x direction

6 0
4 years ago
If the size of the charge value is tripled for both of twopoint charges maintained at a constant separation, the mutual forcebet
ch4aika [34]

Answer:

a) 9.0

Explanation:

The force between two point charges, obeys Coulomb's Law, which can be written as follows:

F =\frac{k*q1*q2}{(r12)^{2} }

As it  can be seen, if the separation between the charges remains the same, the new value of the force will be directly proportional to the product of the charges.

If both charges are tripled, the mutual force between them will be changed in a factor equal to 3.0*3.0 = 9.0

8 0
3 years ago
A train travels 69 kilometers in 3 hours, and then 51 kilometers in 2 hours. What is its average speed? Your Answer: Question 14
tamaranim1 [39]
Average speed = (total distance covered) / (time to cover the distance)

Total distance = 69 km + 51 km = 120 km

Total time = 3 hrs + 2 hrs = 5 hrs

Average speed = (120 km) / (5 hrs) = 24 km/hr 
5 0
3 years ago
it is possible to tell if objects in space are moving closer to us or farther away based on which of the following?
valkas [14]
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7 0
4 years ago
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