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
Elis [28]
3 years ago
12

Following a collision between a large spacecraft and an asteroid, a copper disk of radius 28.0 m and thickness 1.20 m, at a temp

erature of 850°C, is floating in space, rotating about its axis with an angular speed of 20.0 rad/s. As the disk radiates infrared light, its temperature falls to 20.0°C. No external torque acts on the disk.
A) Find the change in kinetic energy of the disk.
B) Find the change in internal energy of the disk.
C) Find the amount of energy it radiates.

Physics
1 answer:
coldgirl [10]3 years ago
3 0

Answer:

A. 9.31 x10^10J

B. -8.47x10 ^ 12J

C. 8.38x 10^12J

Explanation:

See attached file pls

You might be interested in
The maximum force that a grocery bag can withstand without ripping is 250 n. Suppose that the bag is filled with 20 kg of grocer
zhannawk [14.2K]

Answer:

Groceries stay in the bag.

Explanation:

Given:

Maximum force = 250 N

Bag filled with = 20 kg

Lifted acceleration = 5.0\ m/s^2

Solution:

We need to calculate the exerted force on the grocery bag by using Newton's second law.

F = ma

Where:

F = Exerted force on the object.

m = Mass of the object in kg

a = Acceleration of the object in m/s^2

Now, we substitute m = 20 kg and a = 5.0\ m/s^2 in Newton's second law,

F = 20\times 5.0

F = 100\ m/s^2

Since, the exerted force on the bag is less than 250 N, the groceries will stay in the bag.

3 0
3 years ago
A ball is at rest at the top of a hill until a boy kicked it with his foot. What is the force that causes motion in this scenari
vazorg [7]
The boy’s foot causes the motion. His foot is the one that causes the ball to roll down the hill.
3 0
2 years ago
The diagram shows the scales used for recording
padilas [110]

Answer: 212

Explanation:

3 0
3 years ago
A space walking astronaut has become detached from her spaceship.shes floating in space while holding a wrench she is thinking a
victus00 [196]

Answer:

Newton's third law of motion states that for every action, there is equal and opposite reaction.

While space walking, when the astronaut gets detached from the space ship, she floats in space holding a wrench. In order to get back to the spaceship, she should throw the wrench in the opposite direction of the spaceship. This action would  cause a reaction on her own body and she would be pushed away from the wrench and towards the spaceship. Thus, she can return back to the spaceship in this way.

4 0
3 years ago
A person covers a distance of 320 miles in a travel time of 8 hours. What is the speed for this trip?
goldfiish [28.3K]
Take 320 and divide by 8
320/8 = 40 mi/hr or A
8 0
3 years ago
Read 2 more answers
Other questions:
  • What is the name for the area of dust and debris which orbited the young sun and eventually became planets and moons?
    10·2 answers
  • What are 3 ways you can save energy on earth day or any day?
    5·1 answer
  • The flow rate over Niagara falls is 84,760 cfs (cubic feet per second), and the drop from top to bottom is 167 feet. If this flo
    7·1 answer
  • If an object has 100 J of PE, how much work can it do (with that PE)?
    15·1 answer
  • Which is NOT a way to stay safe from static electricity?
    10·2 answers
  • A spring stretches 2 cm when a 10 N weight hangs on it. How far will it stretch with a weight of 20 N ?
    15·1 answer
  • How many milliliters are in 3.2 L? (1000 mL = 1L)
    14·2 answers
  • The graph of an object's position over time is a horizontal line and y is not equal to 0. What must be true abou
    13·1 answer
  • A plane that is 2000m in the air of the potential energy of the plane is 86000 J what is the mass of the plane
    5·1 answer
  • Which example is a simple machine?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!