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
Snowcat [4.5K]
2 years ago
14

As human populations grow, it becomes more important to use renewable sources of energy. Which of the following objects uses ene

rgy from a renewable source?
A-a stove that is powered by natural gas

B- a refrigerator that runs on solar power

C- a lantern that burns oil from beneath Earth's surface

D- a toaster that uses electricity from a coal-burning power plant
Chemistry
1 answer:
AleksandrR [38]2 years ago
4 0
B

explanation:
it’s common sense
You might be interested in
A(n) ____________ is a substance in which all the exact combinations of elements are always the same.
sveta [45]
B. compound
source is Glencoe Science book grade 7.
Also I just happening to be learning about this at school
3 0
3 years ago
An iron block of mass 18 kg is heated from 285 K to 318 K. If 267.3 kJ is required, what is the specific heat of iron? A. 450.00
valkas [14]

Answer:

  • <u>Option A. 450.00</u>

Explanation:

<u>1) Data:</u>

a) m = 18 kg

b) T₁ = 285 K

c) T₂ = 318 K

d) Q = 267.3 kJ

e) S = ?

<u>2) Principles and equations</u>

The specific heat of a substance is the amount of heat energy absorbed to increase the temperature of certain amount (gram, kg, or moles, depending on the definition or units) of the substance in 1 ° C or 1 K.

The mathematical relation between the specific heat and the heat energy absorbed is:

  • Q = m × S × ΔT

Where,

  • Q is the heat absorbed,
  • S is the specific heat, and
  • ΔT is the temperature increase (T₂ - T₁)

<u>3) Solution:</u>

<u>a) Substitute the data into the equation:</u>

  • 267.3 kJ = 18 kg × S × (318 K - 285 K)

<u>b) Solve for S and compute:</u>

  • S = 267.3 kJ / (18 kg × 33 K) = 0.45 kJ / (Kg . K)

The options have not units, but I notice that the first answer is 1,000 times the answer I obtained, so I will make a conversion of units.

<u>c) Convert to J /( kg . k):</u>

  • 0.45 kJ / (Kg . K) × 1,000 J / kJ = 450 J / (kg . K)

Now we can see that the option A is is the answer, assuming the units.

6 0
3 years ago
What advice would you give to a person who handles hydrogen and oxygen in their workplace?I think I have an idea of what advice
joja [24]
Regard the principle of utilization of two gas.

Make a consistent control of hardware containing gas.

Make a consistent control of weight diminishing valves giving gas.

No smoking zone.
8 0
3 years ago
If a car travels 400 meters in 20 sec how fast is it going
pochemuha

Answer:

400 meters every 20 seconds

Explanation:

7 0
3 years ago
Read 2 more answers
I'm very confused can someone help me please I would really appreciate it
sasho [114]
1. temperature is dependent
2. energy is independent
3. the graph looks like a line sloping upward
4. the line means that as energy increases the temperature also increases
5. a straight line would mean that as energy increases temperature remains constant
sorry that's all I can do
7 0
3 years ago
Other questions:
  • The interactions between water molecules and other non-water molecules through hydrogen bonding is known as ____________________
    9·1 answer
  • What is the layer of the earths atmosphere that we live in
    5·2 answers
  • Using the following chemical reaction, perform the theoretical stoi
    14·1 answer
  • Gold ions occur in seawater to the extent of1.0.
    11·1 answer
  • Is tar used to manufacture coal tar and coke
    8·1 answer
  • Which of these would produce a soft sound A (a slow vibration) B (a big vibration) C (a fast vibration) or D (a tiny vibration)
    5·1 answer
  • Which of the following industrial processes involves a voltaic cell rather than electrolysis?
    7·2 answers
  • Answering the following questions will help you focus on the outcomes of the experiments.
    14·1 answer
  • Pls help me with this question!!
    5·2 answers
  • Where would you expect to find the 1H NMR signal of (CH3)2Mg relative to the TMS signal? (Hint: Magnesium is less electronegativ
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!