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
lys-0071 [83]
3 years ago
9

A speaker vibrates at a frequency of 200 hz. What is it's period ?

Physics
1 answer:
Katen [24]3 years ago
8 0
200 Hz = 200 cycles per sec 

<span>1 cycle, the period = 1/200 = 0.005 seconds, or 5 milli seconds.</span>
You might be interested in
1. In this activity, you will be looking for a relationship between the mass of the cart and the acceleration of the cart.
posledela

Answer:

Mass of cart

Explanation:

7 0
3 years ago
An electron is confined to a one dimensional region, bounded by an infinite potential. If the energy of the electron in its firs
OLga [1]

Answer:

The energy in its ground state is 10 meV.

Explanation:

It is given that,

The energy of the electron in its first excited state is 40 meV.

Energy of the electron in any state is given by :

E=\dfrac{n^2\pi^2h^2}{8mL^2}

For ground state, n = 1

E_1=\dfrac{\pi^2h^2}{8mL^2}.............(1)

For first excited state, n = 2

40=\dfrac{2^2\pi^2h^2}{8mL^2}.............(2)

Dividing equation (1) and (2), we get :

\dfrac{E_1}{40}=\dfrac{1}{4}

E_1=10\ meV

So, the energy in its ground state is 10 meV. Hence, this is the required solution.

4 0
3 years ago
RHOOLIOTTO<br> How much mass would be needed to produce 2.7 x 1016 J?
Radda [10]
E = mc^2
m = e/c^2
m = 2.7*10^16/(300000^2)
m = 300000
8 0
3 years ago
Help plzzzz thank youu
dybincka [34]
The answer is B I hope this helps luv
5 0
3 years ago
Potassium is a crucial element for the healthy operation of the human
Degger [83]

Answer:

1

  The mass of the Potassium-40 is  m_{40}} = 2.88*10^{-6} kg

2

  The Dose per year in Sieverts is   Dose_s = 26.4 *10^{-10}

Explanation:

From the question we are told that

   The isotopes of potassium in the body are Potassium-39, Potassium-40, and Potassium- 41

    Their abundance is 93.26%, 0.012% and 6.728%

   The mass of potassium contained in human body is  m = 3.0 g = \frac{3}{1000} = 0.0003 \ kg per kg of the body

    The mass of the first body is  m_1 = 80 \ kg

Now the mass of  potassium  in this body is mathematically evaluated as

       m_p =  m * m_1

substituting value

       m_p =  80  * 0.0003

      m_p  =0.024 kg

The amount of Potassium-40 present  is mathematically evaluated as

      m_{40}} =0.012% * 0.024

      m_{40}} = \frac{0.012}{100}  * 0.024

      m_{40}} = 2.88*10^{-6} kg

The dose of energy absorbed per year is mathematically represented as

          Dose  = \frac{E}{m_1}

Where E is the energy absorbed which is given as E = 1.10 MeV = 1.10 * 10^6 * 1.602*10^{-19}

    Substituting value

            Dose  = \frac{ 1.10 * 10^6 * 1.602*10^{-19}}{80}

            Dose  = 22*10^{-10} J/kg

The Dose in Sieverts is evaluated as

       Dose_s = REB * Dose

       Dose_s = 1.2 * 22*10^{-10}

       Dose_s = 26.4 *10^{-10}

             

3 0
2 years ago
Other questions:
  • The theory that light exists in quantized "chunks" was proposed in response
    11·2 answers
  • How much work is done if a box weighing 28 newtons is carrird up a ladder for a distance of 2m
    6·1 answer
  • A transformer is to be used to step down voltage from an alternating current source from 220V to 110V. If the primary has 120 tu
    14·1 answer
  • Which statement does NOT explain the concept of the Doppler Effect? A. As an observer moves away from a stationary sound, the so
    6·1 answer
  • Is time a <br><br> vector,<br> scalar,<br> both,<br> neither
    15·1 answer
  • 25000 seconds is how many days?
    9·2 answers
  • Energy conservation
    15·1 answer
  • Describe an experiment to show that air support burning​
    13·1 answer
  • 4. Three methods that people use are:
    11·1 answer
  • Using two boxes, design two solar ovens. Before you build, describe your designs. Discuss elements such as materials, box shape,
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!