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
pochemuha
3 years ago
5

What is the change in internal energy if a gas loses 80 joules of heat, and then does 60

Physics
1 answer:
lana66690 [7]3 years ago
3 0

Answer:

-140

Explanation:

A gas loses 80joules of heat.

The gas also does 60 joules of work

Therefore the change in internal energy can be calculated as follows

= -80 + (-60)

= -80-60

= -140

Hence the change in internal energy is -140

You might be interested in
A rock is suspended from a string, and it accelerates downward. Which one of the following statements is correct? Group of answe
Tems11 [23]

Answer:

a. The magnitude of the tension in the string is greater than the magnitude of the weight of the rock.

Explanation:

During the motion of the rock while it is in downward motion we can say

T - mg cos\theta = ma_c

since it is performing circular motion so we will have its acceleration towards its center

T = mgcos\theta + ma_c

a_c = \frac{v^2}{L}

T = mgcos\theta + \frac{mv^2}{L}

So at the lowest point of the path we can say

T = mg + \frac{mv^2}{L}

so correct answer is

a. The magnitude of the tension in the string is greater than the magnitude of the weight of the rock.

4 0
3 years ago
when an incandescent light bulb is turned on, its thin wire filament heats up quickly. as the temperature of this wire filament
Leno4ka [110]

Well, we usually assume that the resistance of a circuit component
is constant and doesn't change.  But the truth is that for anything
that conducts current, its resistance always increases somewhat
when it warms up. 

For things like light bulbs, electric toasters, space heaters, electric
stove burners, the heat coils in a blow-dryer ... anything that's
designed to be really hot when it's doing its job ... the resistance
of those things increases significantly when they come up to their
operating temperatures.
6 0
3 years ago
A machine which has an energy loss of 10% will have efficiency of​
larisa [96]

Answer:

90%

Explanation:

if you lose 10% of a 100 you get 90

6 0
2 years ago
The rate of cooling determines ....... and ......​
PilotLPTM [1.2K]

Answer:

freezing point and melting point

7 0
3 years ago
If an 800 kg roller coaster is at the top of its 50 m high track, it will have a potential energy pf 392,000 J and a kinetic ene
Viefleur [7K]
I just woke him crying crying laughing crying and laughing I’m so mad he got me blocked him lol I got a hold on her phone the answer is 0 m
5 0
3 years ago
Other questions:
  • Paragraph about cell wall
    15·2 answers
  • What is another term means balance in physics?
    15·2 answers
  • A 500 N passenger weighs 24500 N elevator that rises 30 m in exactly 1 minute how much power is needed for the elevators trip
    7·1 answer
  • A complete description of simple harmonic motion must take into account several physical quantities and various mathematical rel
    12·2 answers
  • What determines the strength of the force of gravity: the mass or the volume of an object? why?
    10·2 answers
  • Asteroid Toutatis passed near Earth in 2006 at four times the distance to our Moon. This was the closest approach we will have u
    11·1 answer
  • Which statement is true about nuclear fusion? it is caused by the same process that causes nuclear fission.
    14·2 answers
  • What is the scientific term for this type of wave that was produced by a drum?
    10·1 answer
  • How much sweat (in ml) would you have to evaporate per hour to remove the same amount of heat a 90.0 w light bulb produces? (1w=
    6·1 answer
  • What causes the phenomenon of "red shift" and "blue shift" in astronomy? *
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!