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
bezimeni [28]
3 years ago
7

As the captain of the scientific team sent to Planet Physics, one of your tasks is to measure g. You have a long, thin wire labe

led 1.01g/m and a 1.30kg weight. You have your accurate space cadet chronometer but, unfortunately, you seem to have forgotten a meter stick. Undeterred, you first find the midpoint of the wire by folding it in half. You then attach one end of the wire to the wall of your laboratory, stretch it horizontally to pass over a pulley at the midpoint of the wire, then tie the 1.30kg weight to the end hanging over the pulley. By vibrating the wire, and measuring time with your chronometer, you find that the wire's second harmonic frequency is 200Hz . Next, with the 1.30kg weight still tied to one end of the wire, you attach the other end to the ceiling to make a pendulum. You find that the pendulum requires 316s to complete 100 oscillations. Pulling out your trusty calculator, you get to work. What value of g will you report back to headquarters?
Physics
1 answer:
spin [16.1K]3 years ago
6 0

Answer:

1.19 m/s²

Explanation:

The frequency of the wave generated in the string in the first experiment is f = n/2l√T/μ were T = tension in string = mg were m = 1.30 kg weight = 1300 g , μ = mass per unit length of string = 1.01 g/m. l = length of string to pulley = l₀/2 were l₀ = lent of string. Since f is the second harmonic, n = 2, so

f = 2/2(l₀/2)√mg/μ = 2(√mg/μ)/l₀    (1)

Also, for the second experiment, the period of the wave in the string is T = 2π√l₀/g. From (1) l₀ = 2(√mg/μ)/f and from (2) l₀ = T²g/4π²

Equating (1) and (2) we ave

2(√mg/μ)/f = T²g/4π²

Making g subject of the formula

g = 2π√(2√(m/μ)/f)/T

The period T = 316 s/100 = 3.16 s

Substituting the other values into , we have

g = 2π√(2√(1300 g/1.01 g/m)/200 Hz)/3.16

g = 2π√(2 × 35.877/200 Hz)/3.16

g = 2π√(71.753/200 Hz)/3.16

g = 2π√(0.358)/3.16

g = 2π × 0.599/3.16

g = 1.19 m/s²

You might be interested in
types of plate boundaries where two plates separate or move apart?? does anyone know please help ??????
Shtirlitz [24]
Erosion i belive it is called
7 0
3 years ago
Read 2 more answers
Which of the following diagrams shows the path of deep water currents in the ocean?
Whitepunk [10]
I hope this helps. ^-^

6 0
3 years ago
Which would most likely cause specular reflection? O a pathway with rough rocks a shiny, smooth leaf a small patch of soil a rou
andrew11 [14]

Answer:

a shiny smooth leaf

Explanation:

A shiny smooth leaf will cause specular reflection. Other choices will cause diffused reflection from the surface.

A specular reflection is similar to how a mirror or smooth surface reflects. The incident light is given off as a single ordered reflection from the surface of a body.

For this to occur, the surface incident must be smooth and without rough patterns on it.

A path way with rough rocks, small patch of soil and rough logs will give off diffused reflection

8 0
2 years ago
Read 2 more answers
A small grinding wheel has a moment of inertia of 4.0*10-5kgm2. What net torque must be applied to the wheel for its angular acc
kvv77 [185]

Hi there!

We can use the rotational equivalent of Newton's Second Law:

\huge\boxed{\Sigma \tau = I \alpha}

Στ = Net Torque (Nm)

I = Moment of inertia (kgm²)

α = Angular acceleration (rad/sec²)

We can plug in the given values to solve.

\Sigma \tau = (4 * 10^{-5})(150) = \boxed{0.006 Nm}

4 0
2 years ago
Explain what is happening to the skater and why it is happening. (with friction)
Svetlanka [38]

Answer:

the skater is falling bc of gravity and kinetic energy

Explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • Describe the action and reaction force pairs involved when an object falls toward earth
    15·1 answer
  • A gang of robbers is escaping across city roofs at night. They come to the edge of one building and need to drop down to their g
    5·1 answer
  • URGENT!!! PLEASE HELP!!!!<br> In what kind of ecosystem can the population of a Leopard be found?
    13·1 answer
  • During the power stroke energy released by combustion generates the force that:_______.
    7·1 answer
  • A copper part is heated. Does its mass, volume and density change?
    9·2 answers
  • Identify whether the following statements describe a change in acceleration. Explain your response answer them all plz
    7·2 answers
  • An object weighs 250N and has a mass of 75 kg. what is the gravity on this planet?
    10·1 answer
  • What are some of the main types of force? Explain.
    6·2 answers
  • What is the mass of a 200 kg object on Venus?
    13·2 answers
  • On an ice skating rink, a girl of mass 50 kg stands stationary, face to face with a boy of mass 80 kg. The children push off of
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!