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
Elina [12.6K]
3 years ago
15

Hi! Can you guys help me on my Re-do test I don’t want to fail. Ten points plus Brainliest if all are correct. Thanks!

Physics
2 answers:
rewona [7]3 years ago
3 0

WARNING !!! i don’t know for sure but i tried my best.

1. False

2. True

3. Yes

4. Yes

5. Yes

Nataly_w [17]3 years ago
3 0
1 false
2true
3yes
4tes
5yes
You might be interested in
One kg of air contained in a piston-cylinder assembly undergoes a process from an initial state whereT1=300K,v1=0.8m3/kg, to a f
lutik1710 [3]

Answer:

1. Yes, it can occur adiabatically.

2. The work required is: 86.4kJ

Explanation:

1. The internal energy of a gas is just function of its temperature, and the temperature changes between the states, so, the internal energy must change, but how could it be possible without heat transfer? This process may occur adiabatically due to the energy balance:

U_{2}-U_{1}=W

This balance tell us that the internal energy changes may occur due to work that, in this case, si done over the system.

2. An internal energy change of a gas may be calculated as:

du=C_{v}dT

Assuming C_{v} constant,

U_{2}-U_{1}=W=m*C_{v}(T_{2}-T_{1})

W=0.72*1*(420-300)=86.4kJ

8 0
3 years ago
The Statue of Liberty is made of Copper that has turned on Says has WAGNE Bongo Wantse
Semenov [28]

Complete Question:

The Statue of Liberty is made of copper that has turned green because it has undergone a change. What can be said about this change?

Group of answer choices.

A. The change is a physical change because the copper in the statue is still there.

B. The change is a physical change because a new chemical is formed on the outside of the statue.

C. The change is not a physical change because the color of the statue has changed.

D. The change is not a physical change because a new chemical is formed on the outside of the statue.

Answer:

D. The change is not a physical change because a new chemical is formed on the outside of the statue.

Explanation:

A physical change can be defined as a type of change that only affects the physical form of a chemical substance (matter) without having any effect on its chemical properties. Thus, a physical change would only affect the physical appearance and properties of a chemical substance (matter) but not its chemical properties.

This ultimately implies that, a physical change result in a change of matter from one form or phase (liquid, solid or gas) to another without a corresponding change in chemical composition.

Additionally, a physical change is a type of change that involves an increase or decrease in the volume of a physical object (object). Also, this change can be reversed to the original state under certain conditions.

Since the Statue of Liberty which is made of copper turned green, the change is not a physical change because a new chemical is formed on the outside of the statue.

5 0
3 years ago
This person does work to stretch the rubber band. When will the potential energy be the greatest?
antiseptic1488 [7]

the rubber band will be at its greatest when its fully stretched out

7 0
3 years ago
Why steel is more elastic than rubble
Monica [59]
Steel is more elastic than rubber<span> because </span>steel<span> comes back to its original shape faster </span>than rubber<span> when the deforming forces are removed,  hope it helps :)</span>
3 0
3 years ago
according to newton's second law of motion of the net force acting on the object increases while the mass of the object remains
Licemer1 [7]

Answer:

The Acceleration will increase

Explanation:

Newton's Second Law of motion: It states that the rate of change of momentum is directly proportional to the applied force and takes places along the direction of the force.

It can be expressed mathematically as,

F ∝ m(v-u)/t

Where (v-u)/t = a

F  = kma.

F = force, m = mass of the body, a = acceleration, k = constant of proportionality which tend to unity for a unit force, a unit mass, and a unit acceleration.

Therefore,

F = ma.

From the equation above,

If the net force acting on a body increase, while the mass of the body remains constant, the acceleration will also increase.

4 0
3 years ago
Other questions:
  • A group of marine scientists introduced a species of fish into an artificial habitat and wanted to determine whether it will gro
    9·2 answers
  • What is the electric force between a glass ball that has +2.5 x 10^-6 C of charge and a rubber ball that has -5.0 x 10^-6 C of c
    10·1 answer
  • You can see a clock in a spaceship moving past you at 90 percent of the speed of light. according to you, how much time would pa
    7·1 answer
  • What is the answer to this question?
    11·1 answer
  • 8. The moon has about 1/6th the gravity of the Earth. How would the potential energy of an object be different on the moon if it
    15·1 answer
  • 1.A car goes off a cliff horizontally at 49 m/s and falls for 5 seconds
    12·1 answer
  • List four methods that can be used to separate mixtures and give an example of each method?
    6·1 answer
  • Getyour pointsssssssssssssssssssssss
    9·2 answers
  • What is the frequency of a wave that has a period of 5 seconds
    13·2 answers
  • Tuning an Instrument. A musician tunes the C-string of her instrumeut to a fundamental frequency of 65.4 Hz. The vibrating porti
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!