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
marin [14]
3 years ago
7

Calculate the change in total internal energy for a system that releases 2.59 × 104 kJ of heat and does 6.46 × 104 kJ of work on

the surroundings. Enter your answer in scientific notation.
Physics
1 answer:
mrs_skeptik [129]3 years ago
8 0

Answer:

See explanation below

Explanation:

The equation to use for this is the following:

dU = q + w

As the heat is being release, this value is negative, and same here happens with the work done, because it's in the surroundings.

Therefore the change in the energy would be:

dU = -2.59x10^4 - 6.46^4

dU = -9.05x10^4 kJ

You might be interested in
To measure the strength of an earthquake, you can use either a _____ scale or _____ scale.
allsm [11]
To measure the strength of an earthquake, you can use either a Richter scale or Mercalli scale. Richter scale uses the amplitued of the wave and the distance from the source. Mercalli scale uses observations of people and is not considered to be scientific as Richter scale.
8 0
4 years ago
Read 2 more answers
You are asked to design a retroreflector using two mirrors that will reflect a laser beam by 180 degrees independent of the inci
prisoha [69]

Answer:

Consider the diagram. We are effectively being asked to prove that $\alpha=i_1$, for any value of $i_1$. Now, from trigonometry,

Explanation:

3 0
4 years ago
What's an acrostic poem for climate each line has to be written in a full sentence?
Mrac [35]
Acrostic poem is a poem where the initials of the main word is given a respective sentence starting with that initial.
C- Can you see any changes happened in our surrounding?
L- Let me open your eyes and wake up to the reality.
I- Ignoring the unprecedented changes in our environment is worsening.
M- Making a move? Let's start it now.
A- Another day might not come.
T- Take this opportunity to show to world that we care.
E- Even to smallest thing that we can share.
3 0
3 years ago
A student standing on a stationary skateboard tosses a textbook with a mass of mb = 1.25 kg to a friend standing in front of him
juin [17]

Answer:

The velocity of the student has after throwing the book is 0.0345 m/s.

Explanation:

Given that,

Mass of book =1.25 kg

Combined mass = 112 kg

Velocity of book = 3.61 m/s

Angle = 31°

We need to calculate the magnitude of the velocity of the student has after throwing the book

Using conservation of momentum along horizontal  direction

m_{b}v_{b}\cos\theta= m_{c}v_{c}

v_{s}=\dfrac{m_{b}v_{b}\cos\theta}{m_{c}}

Put the value into the formula

v_{c}=\dfrac{1.25\times3.61\times\cos31}{112}

v_{c}=0.0345\ m/s

Hence, The velocity of the student has after throwing the book is 0.0345 m/s.

3 0
3 years ago
2. What is one way that science helps shape society?
zhuklara [117]

Answer:Science is valued by society because the application of scientific knowledge helps to satisfy many basic human needs and improve living standards. Finding a cure for cancer and a clean form of energy are just two topical examples.

Explanation:

4 0
3 years ago
Other questions:
  • Suppose that you wanted to close a door by throwing a ball at the door. one ball will bounce off the door in a perfectly elastic
    7·1 answer
  • How do you the average speed
    15·1 answer
  • The number of waves produced in a given time is the ____ of the wave
    9·1 answer
  • List in order from smallest to largest the grain sizes used to describe detrital rocks.
    11·2 answers
  • Astronaut Mark Kelly and his crew traveled to the International Space Station in the space shuttle. The shuttle burned off all r
    13·2 answers
  • Technician A says that the freezing point of a substance is the temperature at which the substance changes state from a solid to
    10·1 answer
  • What happens when you drop a penny from a height of 20 meters
    14·1 answer
  • a_______ is a region where the magnetic fields of a large number of atoms are lined up parallel to a magnets field.
    8·2 answers
  • Which statement describes how nuclear power generation systems work?
    11·1 answer
  • How long must a pendulum be to have a period of 4.6 5 on Neptune, where g = 11.15 m/s?​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!