answer.
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
yan [13]
2 years ago
13

Calculate δe, if q= 0.764 kj and w= -830 j . express your answer using two significant figures.

Mathematics
1 answer:
Deffense [45]2 years ago
8 0
Given:
Q = 0.0764 kJ = 764 J, heat input
W = -830 J, useful work done

From the 1st Law of Thermodynamics, the change in internal energy is
δE = Q - W
     = 764  - (-830)
     =  1594 J = 1.594 kJ

Answer: 1.59 kJ (two sig. fig.)
You might be interested in
Emma is building a wall around her garden. It has taken 45 minutes, and she is 75% dome. What is the total time it will take Emm
rodikova [14]
The answer is 15 minutes
8 0
2 years ago
June has a credit card balance of $4,350 that comes with a 19% APR. She would like to have the balance paid off in the next 8 mo
omeli [17]
It's B on E2020, I just took the test.
3 0
2 years ago
Read 2 more answers
Robert has $50 to spend on his utility bills each month. The basic monthly charge is 23.77 electricity costs 0.1117 for each kil
Lilit [14]

Answer:

<em>The maximum number of kilowatt-hours is 235</em>

Step-by-step explanation:

<u>Inequalities</u>

Robert's monthly utility budget is represented by the inequality:

0.1116x + 23.77 < 50

Where x is the number of kilowatts of electricity used.

We are required to find the maximum number of kilowatts-hours used without going over the monthly budget. Solve the above inequality:

0.1116x + 23.77 < 50

Subtracting 23.77:

0.1116x < 50 - 23.77

0.1116x < 26.23

Dividing by 0.1116:

x < 26.23/0.1116

x < 235

The maximum number of kilowatt-hours is 235

7 0
1 year ago
Two runners are saving money to attend a marathon. The first runner has $112 in savings, received a $45 gift from a friend, and
scoundrel [369]

Answer:

The correct answer is the last option, that is, 112 + 25m + 45 = 50 + 60m

Step-by-step explanation:

We have been given that the first runner has $112 in savings, received a $45 gift from a friend, and will save $25 each month. Therefore, amount of money in the account of first running after m months will be: 112+45+25m

We have been given that the second runner has $50 in savings and will save $60 each month. Therefore, amount of money in the account of second running after m months will be: 50 + 60m

In order for amount of money to be equal in accounts of both the runners, we set up:

112+45+25m=50+60m

Upon rewriting the left hand side using commutative law, we get:

112+25m+45=50+60m

Therefore, we can see that the last option is the correct answer.

7 0
2 years ago
Read 2 more answers
Given: AD ≅ BC and AD ∥ BC Prove: ABCD is a parallelogram. Statements Reasons 1. AD ≅ BC; AD ∥ BC 1. given 2. ∠CAD and ∠ACB are
ira [324]

 Given: AD ≅ BC and AD ∥ BC

Prove: ABCD is a parallelogram.

 Statements                                                                 Reasons

 1. AD ≅ BC; AD ∥ BC                                              1. given

 2. ∠CAD and ∠ACB are alternate interior ∠s          2. definition of alternate                                                                                    interior angles

3. ∠CAD ≅ ∠ACB                                                    3. alternate interior                                                                                          angles are congruent

4. AC ≅ AC                                                              4. reflexive property

 5. △CAD ≅ △ACB                                                  5. SAS congruency                                                                                                   theorem

6. AB ≅ CD                                                            6. Corresponding Parts                                                                                   of Congruent triangles are                                                                               Congruent (CPCTC)

7. ABCD is a parallelogram                                  7. parallelogram side                                                                                         theorem

<span> </span>

5 0
2 years ago
Read 2 more answers
Other questions:
  • A car travels 15 kilometers west in 10 minutes. After reaching the destination, the car travels back to the starting point, agai
    8·2 answers
  • tim drives at an average speed of 80km per hour for 3 hours 45 minutes work out how many kilometres tim drives
    12·1 answer
  • Why do banks charge fees?
    9·1 answer
  • Sole the equation 6n + 9 = -3n - 21 - 6 for n
    8·2 answers
  • Find the coordinates of point B that lies along the directed line segment from A(-5, 2) to C(11, 0) and partitions the segment i
    9·2 answers
  • At a college, 72% of courses have final exams and 46% of courses require research papers. Suppose that 31% of courses have a res
    11·1 answer
  • Determine which of (a)-(d) form a solution to the given system for any choice of the free parameter. (HINT: All parameters of a
    9·2 answers
  • A cheese processing company wants to estimate the mean cholesterol content of all one-ounce servings of a type of cheese. The es
    10·1 answer
  • Caleb’s puppy weighs 2,250 grams. If the puppy weighed 600 grams at his last visit to the veterinarian’s office, what is the per
    14·1 answer
  • L
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!