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
alexgriva [62]
3 years ago
8

I'm not sure what to use help me please

Physics
1 answer:
DaniilM [7]3 years ago
5 0

Answer:

Mass of the ring is 2.5 kg.

Given:

Moment of inertia of a ring = 0.4 kg.m^{2}

Radius = 40 cm = 0.4 m

To find:

Mass of the ring = ?

Formula used:

I = m r^{2}

Where I = moment of inertia

r = radius of the ring

m = mass of the ring

Solution:

Moment of inertia of a ring is given by,

I = m r^{2}

Where I = moment of inertia

r = radius of the ring

m = mass of the ring

0.4 = m ×0.4×0.4

m = 0.4/(0.4×0.4)

m = 1/0.4

m = 2.5 kg

Mass of the ring is 2.5 kg.

You might be interested in
Which statement accurately describes what happens when water turns to steam in terms of energy?
Fynjy0 [20]
The correct answer is D. The water absorbs energy which causes the water molecules to have more kinetic and potential energy, changing their configuration from a liquid to a gas.
4 0
3 years ago
As seen in the figure, a bullet with mass of 15.0-g is fired vertically and penetrates a block with mass of 2.5-kg and the block
rodikova [14]

Answer:

KE = 2.03 J

Explanation:

After impact, the kinetic energy of the bullet+block will convert to potential energy

½mv² = mgh

v = √(2gh) = √(2(9.81)(0.00500) = 0.0981 m/s

conservation of momentum during the collision

0.015u + 2.50(0) = (2.50 + 0.015)(0.0981)

u = 16.4481 m/s

KE = ½mv² = ½(0.015)16.4481² = 2.0290499...

KE = 2.03 J

4 0
3 years ago
Select the correct answer. A golfer hits a golf ball with a velocity of 36.0 meters/second at an angle of28.0°. If the hang time
lions [1.4K]
Its 83 im pretty sure :)
5 0
3 years ago
A student measures out 5.0 g of magnesium and burns it. After the reaction, the student
kondor19780726 [428]

Answer:

The answer is 2.9. g

Explanation:

7.9 - 5.0 = 2.9

I hope this helps!

4 0
2 years ago
Looking at the same nonmetal group on the periodic table, how does the reactivity of an element in period 2 compare to the react
Dmitry_Shevchenko [17]
The reactivity of a nonmetal element in period 2 would be more violent than an element in period 4, as the size of the element and its ability to gain electrons would decrease as you go down the group in the table. Nonmetals want to form negative ions, as their weak valence shell allows them to gain electrons from other elements.

From the information gathered, the answer is '<span>The period 2 element would be more reactive because the attractive force of protons is stronger when electrons are attracted to a closer electron shell'. </span>
7 0
3 years ago
Read 2 more answers
Other questions:
  • PLEASE HELP IM STUCK ON THIS I STUDIED AND I STILL DONT GET IT I ASKED TEACHERS BUT THEY WONT HELP PLZ HELP
    14·1 answer
  • What happens when the number of protons in an atom changes
    6·1 answer
  • A piece of rope is pulled by two people in a tug-of-war. each exerts a 400-n force. what is the tension in the rope?
    13·2 answers
  • A _______ property of gasoline is that it will _______ in air.
    12·2 answers
  • The average standard rectangular building brick has a mass of 3.10 kg and dimensions of 225 m x 112 m x 75 m. The gravitational
    8·1 answer
  • Two open organ pipes, sounding together, produce a beat frequency of 8.0 Hz . The shorter one is 2.08 m long. How long is the ot
    9·1 answer
  • Please help I don't know what the answer is
    11·1 answer
  • Please help as fast you can
    9·1 answer
  • you want to describe the harmonic motion of a swing. you find out that it takes 2 seconds for the swing to complete one cycle. w
    9·1 answer
  • Question 1 of 7What is the change in internal energy if 90 J of thermal energy is added to asystem, and the system does 30 J of
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!