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
adelina 88 [10]
3 years ago
7

Find the change in internal energy, AU, if Q = 2.5 Joules and W = -30.5 Joules. *

Physics
1 answer:
Lena [83]3 years ago
4 0

Answer:

33 J

Explanation:

Using first law of thermodynamics

Q= W + U

2.5 = -30.5 + U

U = 2.5 + 30.5

U = 33 J

You might be interested in
Which combination of elements below will bond ionically and in the same
Zinaida [17]
Sodium and chlorine
3 0
3 years ago
Which of the following is NOT an indicator of a physical change?
S_A_V [24]

Answer:

1.  C.  The change is easily reversible

2. A.  a physical change

Explanation:

Happy Holidays

8 0
2 years ago
A 850-kg sports car accelerates from rest to 95 km/h in 6.8 s .
swat32

From the calculations, the power expended is 43650 W.

<h3>What is the power expended?</h3>

Now we can find the acceleration from;

v = u + at

u = 0 m/s

v =  95 km/h or 26.4 m/s

t =  6.8 s

a = ?

Now

v = at

a = v/t

a = 26.4 m/s/ 6.8 s

a = 3.88 m/s^2

Force = ma = 850-kg * 3.88 m/s^2 = 3298 N

The distance covered is obtained from;

v^2 = u^2 + 2as

v^2 = 2as

s = v^2/2a

s = (26.4)^2/2 * 3.88

s = 696.96/7.76

s = 90 m

Now;

Work = Fs

Work =  3298 N * 90 m = 296820 J

Power =  296820 J/ 6.8 s

= 43650 W

Learn more about power expended:brainly.com/question/11579192

#SPJ1

5 0
2 years ago
Two 800 cm^3 containers hold identical amounts of a monatomic gas at 20°C. Container A is rigid. Container B has a 100 cm^2 pis
Vikki [24]

Answer:

1) Final Temperature of the gas in A will be GREATER than the temperature in B

2) Diagram of both processes on a single PV has been uploaded below

3) The Initial  pressures in containers A and B is 3039.87 J/liters

4) the final volume of container B is 923.36 cm³

Explanation:

Given that;

Temperature = 20°C = 293 K

mass of piston = 10 kg

Area = 100cm³

Volume V = 800 cm³ = 0.8 L

ideal gas constant R = 8.3 J/K·mol

1)

Final Temperature of the gas in A will b GREATER than the temperature in B

2)

Diagram of both processes on a single PV has been uploaded below,

3)

Initial  pressures in containers A and B

PV = nRT

P = RT/V

we substitute

P = (8.3 × 293) /  0.8

P = 2431.9 / 0.8

P = 3039.87 J/liters

Therefore, The Initial  pressures in containers A and B is 3039.87 J/liters

4)

Given that;

power = 25 W

time t = 15s

the final volume of container B = ?

we know that;

work done = power × time

work done = 25 × 15 = 375

Also work done = P( V₂ - V₁ )

so we substitute

375 = 3039.87 ( V₂ - 0.8 )

( V₂ - 0.8 ) = 375 / 3039.87

V₂ - 0.8 = 0.12336

V₂ = 0.12336 + 0.8

V₂ = 0.92336 Litres

V₂ = 923.36 cm³

Therefore, the final volume of container B is 923.36 cm³

7 0
2 years ago
Why is damage from sound waves is an issue on the launchpad but not in the air
elixir [45]
Because it is if you know you know and it is also helping the sentwcnde and air and confiscation
6 0
2 years ago
Other questions:
  • What is the kinetic energy of an automobile with a mass of 1252 kg traveling at a speed of 12 m/s?
    14·1 answer
  • Review Conceptual Example 16 as background for this problem. The water skier there has a mass of 73 kg. Find the magnitude of th
    7·1 answer
  • A square coil of wire with side 8.0 cm and 50 turns sits in a uniform magnetic field that is perpendicular to the plane of the c
    15·1 answer
  • What kind of wave is each of the following? The sound of one whale calling another whale under water. A pulse sent down a stretc
    7·1 answer
  • A flat plate maintained at a temperature of 80°C experiences a flow of atmospheric air at 0°C. If the temperature gradient at th
    13·1 answer
  • Name the following ionic bonds.
    14·2 answers
  • how do i find out the maximum speed and things? also, if you can give the answer and tell me why that would be amazing!!
    8·1 answer
  • According to Newton's law of motion, when we shake a mango tree, mangoes fall down explain.​
    15·1 answer
  • Jenny puts a book on her desk. Jenny’s book has an area of 200 cm2.It exerts a pressure of 0.05 N/cm2 on the desk. What is the w
    7·1 answer
  • If the coefficient of kinetic friction between tires and dry pavement is 0.93. What is the shortest distance in which you can st
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!