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
suter [353]
3 years ago
9

g 2. In a laboratory experiment on standing waves a string 3.0 ft long is attached to the prong of an electrically driven tuning

fork which vibrates perpendicular to the length of the string at a frequency of 60 Hz. The weight (not mass) of the string is 0.096 lb. a) [5 pts] What tension must the string be under (weights are attached to the other end) if it is to vibrate in four loops
Physics
1 answer:
abruzzese [7]3 years ago
7 0

Answer:

The tension in string will be "3.62 N".

Explanation:

The given values are:

Length of string:

l = 3 ft

or,

 = 0.9144 m

frequency,

f = 60 Hz

Weight,

= 0.096 lb

or,

= 0.0435 kgm/s²

Now,

The mass will be:

= \frac{0.0435}{9.8}

= 0.0044 \ kg

As we know,

⇒  \lambda=\frac{2L}{n}

On substituting the values, we get

⇒     =\frac{2\times 0.9144}{4}

⇒     =0.4572 \ m

or,

⇒  v=f \lambda

⇒      =0.4572\times 60

⇒      =27.432 \ m/s

Now,

⇒  v=\sqrt{\frac{T}{\mu} }

or,

⇒  T=\frac{m}{l}\times v^2

On putting the above given values, we get

⇒      =\frac{0.0044}{0.9144}\times (27.432)^2

⇒      =\frac{752.51\times 0.0044}{0.9144}

⇒      =3.62 \ N

You might be interested in
An object on the moon will weigh 1/6th of what it does on earth but have the same mass. Why is that?
elena55 [62]

Answer:

Because the weight depends of the gravity

Explanation:

This is because weight and mass are different, in order to better understand this problem we will apply an example with real values, which will help us to determine a person's weight.

A man has a mass of 80 [kg] on Earth when measuring his weight he realizes that it is 784.9 [N] and on the moon it is 130.8 [N]

<u>On Earth</u>

<u />

g_{e} = 9.81[m/s^2]\\g_{m} = 1.635[m/s^2]

Where:

g = gravity

<u>Weight on the moon</u>

<u />

Wm = 80 * 1.635

Wm = 130.8[N]

<u>Weight on the earth</u>

<u />

We = 80 * 9.81

We = 784.8[N]

<u />

In this way we can see that the weight depends on the gravity of where the person is located.

8 0
3 years ago
When sinkholes expand, creating isolated towers of rock, what is occurring?
Illusion [34]

Im pretty sure the answer is D, I may be wrong tho

4 0
3 years ago
Read 2 more answers
Juan measured the temperature of salt water. He then added 273 to the measured value. Which conversion is Juan m
lara31 [8.8K]

Degree Celsius to Kelvin

<u>Explanation</u>:

  • Two units of measuring temperature are Degree Celsius and Kelvin.
  • A measured value in degree Celsius can be converted to Kelvin by adding 273 to it. Here, Juan is doing that conversion - degree Celsius to Kelvin.
  • °C + 273 = K
6 0
3 years ago
Which statement about tempture is correct
motikmotik

Answer:

B temperature is an indirect measurement of the heat energy in a substance

Explanation:

The concept of temperature can be easily understood by looking at what happens when two objects are placed in contact with each other. By common experience, we know that the hotter object transfers heat energy to the colder object, until the two objects are in thermal equilibrium (= they have same temperature).

Thinking about the example above, we can say therefore that the temperature is an indirect measurement of the heat energy possessed by an object (or substance).

For a monoatomic gas, for instance, we define its internal energy as

U=\frac{3}{2}nRT

where n is the number of moles, R is the gas constant, and T is the absolute temperature. From the formula, we see that the temperature is related to the internal energy of the gas, so measuring the temperature means indirectly measuring its internal energy.

7 0
3 years ago
Need an explanation please. Brainliest will be awarded.
Maurinko [17]

We're adding two vectors here.  The first is 300 Newtons to the right, which we can write as (300, 0), meaning 300 to the right, 0 up.

The second is 300 at let's say a 45 degree angle down.  For the components we have an isosceles right triangle with hypotenuse 300, so the components are both magnitude 300/√2 = 150√2.  So we can write this vector (150√2, -150√2), the negative sign because it points down in the y direction.

Adding is componentwise.  The resulting force is (300+150√2, -150√2).

That has square magnitude

r² = (300+150√2)² + (-150√2)² = 150² ( (2+√2)² + (√2)² )

= 150²( (6 + 4√2) + 2)

= 300²(2+√2)

so

r = 300 √(2+√2) Newtons

That's the answer; I'm not sure if your class expects a calculator approximation, which is 554.3 Newtons.

7 0
3 years ago
Other questions:
  • Which of the following is a part of a wave?
    15·1 answer
  • What is the net force on this object?
    8·2 answers
  • An elevator moves from rest<br> to 2 m/s over 8 seconds. What<br> is the elevator's acceleration?
    14·1 answer
  • A sailboat starts from rest and accelerates at a rate of 0.21 m/s^2 over a distance of 280 m. find the magnitude of the boat's f
    6·1 answer
  • Matter's resistance to a change in motion is called _____ and is directly proportional to the mass of an object. For an object t
    15·1 answer
  • A series RLC circuit is connected to a 3.80 kHz oscillator with a peak voltage of 3.80 V. It consists of a 3.50 mH inductor, a 2
    8·1 answer
  • The chilled water system for a 27-story building has a pump located at ground level. The lost head in a vertical riser from the
    13·1 answer
  • At exactly the same time, Daisy and Damond both step off a diving platform 5 meters high. Damond jumps up and out from the platf
    11·1 answer
  • PLEASE HELP.
    11·1 answer
  • A 8.37*10^-5 F capacitor has 2.15*10^-4 C of charge on its plates. How much energy is stored on the capacitor
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!