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
Gnesinka [82]
3 years ago
12

(3 points) A disk is spinning freely with angular speed 6.0 rad/s when a second identical disk, initially not spinning, is dropp

ed on it so that their axes coincide. In a short time the two disks are co-rotating. a) Sketch the initial situation and the consequential situation. b) What is the angular speed of the new system? c) If a third such disk is dropped on the first two, find the final angular speed of the system.

Physics
1 answer:
olga_2 [115]3 years ago
8 0

Answer:

a) The sketch is attached.

b) The angular speed of the new system is 3 rad/s

c) The angular speed of the new system is 2 rad/s

Explanation:

b) The angular speed of the system is:

I_{i} w_{i} =I_{f} w_{f}

Where

Ii = I

If = I + I

wi = 6 rad/s

Replacing:

I*6=(I+I)w_{f} \\w_{f} =\frac{6I}{2I} =3rad/s

c) If a third disk is dropped, the angular speed is:

I*6=(I+I+I)w_{f} \\w_{f} =\frac{6I}{3I} =2rad/s

You might be interested in
Consider a space shuttle which has a mass of about 1.0 x 105 kg and circles the Earth at an altitude of about 200.0 km. Calculat
kodGreya [7K]

Answer:

1.6675×10^-16N

Explanation:

The force of gravity that the space shuttle experiences is expressed as;

g = GM/r²

G is the gravitational constant

M is the mass = 1.0 x 10^5 kg

r is the altitude = 200km = 200,000m

Substitute into the formula

g = 6.67×10^-11 × 1.0×10^5/(2×10^5)²

g = 6.67×10^-6/4×10^10

g = 1.6675×10^{-6-10}

g = 1.6675×10^-16N

Hence the force of gravity experienced by the shuttle is 1.6675×10^-16N

7 0
3 years ago
Why does lightning follow a jagged path
soldier1979 [14.2K]

Answer:

To find the quickest path to the ground

Explanation:

3 0
3 years ago
Read 2 more answers
Quantum mechanics applies to A) subatomic, atomic, nanometer-size, and micrometer-size systems. B) nanometer, micrometer, and ki
Leto [7]

Answer: D) subatomic, atomic, and nanometer-size systems.

Explanation: Quantum mechanics applies to subatomic, atomic, and nanometer-size systems.

8 0
3 years ago
Differents between foundamental quantity and derived quantities
Alborosie

Answer:

fundamental quantity can simply be defined as an independent quantity while derived quantity is dependent i.e. the derive their quantities from the fundamental

6 0
3 years ago
You put two ice cubes in a glass and fill the glass to the rim with water. As the ice melts, the water level
omeli [17]

You put two ice cubes in a glass and fill the glass to the rim with water. As the ice melts, the water level remains the same.

Answer: Option D

<u>Explanation:</u>

As the ice is already in the water, and that has melted, there is no addition of volume into the glass. The water spills out if extra volume is added to the container. Hence, as there is no more volume added, there should be no change seen in the level of water.

The water level stays the same. This is because either it is a solid or liquid, the volume remains same. The volume of ice before melting is same as the volume of water, when melted into.

4 0
3 years ago
Other questions:
  • Which statement correctly compares sound and light waves?
    14·2 answers
  • Nuclear fusion ________.
    10·1 answer
  • If a gas has a gage pressure of 156 kPa, it is absolute pressure is approximately
    13·1 answer
  • A steel ball rolls with a constant velocity on a tabletop 0.950 m high it rolls off and hit the ground 0.352 m from the edge of
    9·1 answer
  • Describe the electron transfers that occur in the formation of calcium fluoride from elemental calcium and elemental fluorine.
    9·1 answer
  • Find the work done by a force of 20 lbs acting in the direction north 50 degrees west in moving an object 4 feet due west?
    12·1 answer
  • A block sliding on ground where μk = .193 experiences a 14.7 N friction force. What is the mass of the block
    10·2 answers
  • What are two factors<br> affecting friction? How do<br> they affect friction?<br> ch
    6·1 answer
  • Part A
    15·1 answer
  • The ball is in contact with the bat for 0.001s use the equation in the box to caluclate the force exerted by the bat on the ball
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!