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
KiRa [710]
3 years ago
6

True or false A clue that a chemical change had occurred is that heat is given off.

Physics
2 answers:
maxonik [38]3 years ago
8 0
True


A chemical change has probably occurred if bubbles are released, there is a change of color, or an odor is produced. Other clues include the release of heat, light, or loud sounds.
oksian1 [2.3K]3 years ago
4 0

Answer:

true

Explanation:

You might be interested in
*NEED THIS ANSWERED ASAP*
Musya8 [376]

Answer:

When the velocity is set to a constant value, the displacement increases with time but the acceleration remains zero

Explanation:

plato

4 0
2 years ago
If a machine has an efficiency of 94% and you apply 574J of work, how much work do you get out of the machine
Mariana [72]
<h3>Answer:</h3>

539.56 Joules

<h3>Explanation:</h3>
  • Efficiency of a machine is the ratio of work output to work input expressed as a percentage.
  • Efficiency = (work output/work input) × 100%
  • Efficiency of a machine is not 100% because so energy is lost due to friction of the moving parts and also as heat.

In this case;

Efficiency = 94%

Work input = 574 Joules

Therefore, Assuming work output is x

94% = (x/574 J) × 100%

0.94 = (x/574 J)

<h3>x = 539.56 J</h3>

Thus, you get work of 539.56 J from the machine

7 0
3 years ago
Which of the following is NOT a natural source of light?
mixas84 [53]

Answer:

neon light

all the others are natural phenomenon

5 0
2 years ago
Read 2 more answers
The former soviet union launched the first artificial earth satellite. What is the name of this satelitte?
faltersainse [42]

Answer:

Sputnik I.

Explanation:

The Soviet Union (former) launched the first artificial earth satellite called Sputnik I on October 4, 1957.

It had a diameter of 58 cm and it weighed 83.6 kg. It had an orbital period of 5880 seconds around the earth. It orbited the 11 weeks (officially 3 weeks but then, its battery died and it orbited for 8 weeks before falling back into the earth's atmosphere).

7 0
3 years ago
Economic growth can be illustrated by: a. ​ an inward shift of the production possibilities curve. b. ​ a movement along the pro
erastovalidia [21]

Answer:

Economic growth can be illustrated by:

d.  an outward shift of the production possibilities curve.

Explanation:

Economic growth is the process of increasing the economy's ability to produce goods and services. It is achieved by increasing the quantity or quality of resources.

Production Possibilities refers to the ability of a country to produce goods or services given the limited resources and technology.  It is therefore possible to increase production of both goods at the same time as long as resources allow it.

The Production Possibilities Curve, also known as the production possibilities frontier, is a graph that shows the maximum number of possible units a company can produce if it only produces two products using all of its resources efficiently. Firstly, and most commonly, growth is defined as an increase in the output that an economy produces over a period of time, the minimum being two consecutive quarters. An increase in an economy's productive potential can be shown by an outward shift in the economy's production possibility frontier (PPF).

Each point on the curve shows how much of each good will be produced when resources shift from making more of one good and less of the other. The curve measures the trade-off between producing one good versus another.PPC or production possibility curve is a curve whose basic purpose is to show the different possible combinations of two goods that can be produced within the given available resource.

The two main characteristics of PPC are: slopes downwards to the right: PPC slopes downwards from left to right. It is because in a situation of fuller utilization of the given resources, production of both the goods cannot be increased simultaneously.

6 0
3 years ago
Other questions:
  • Why are objects that fall near Earth's surface rarely in free fall?
    11·1 answer
  • Compare and contrast how observations and results can be used to support a conclusion to an experiment.
    12·1 answer
  • Which of the following waves have the highest energy? A. Gamma Waves B. Microwaves C. Radio Waves D. Visible Light
    12·2 answers
  • Green light shines through a 100-mm-diameter hole and is observed on a screen. If the hole diameter is increased by 20%, does th
    10·1 answer
  • The behaviors that light exhibits are reflection, refraction, diffraction, polarization, and dispersion. Answer
    11·1 answer
  • A 0.400 kg bead slides on a straight frictionless wire and moves with a velocity of 3.50 cm/s to the right, as shown below. The
    11·1 answer
  • What is the dependent variable in an experiment testing the effects of pH on growth of a seed?
    11·1 answer
  • The angle between reflected ray and the normal line is
    11·1 answer
  • A 0.75 kg rock is projected from the edge of the top of a building with an initial velocity of 11.9 m/s at an angle 59◦ above th
    7·1 answer
  • Match the words in the left-hand column to the appropriate blank in the sentences in the right-hand column. Use each word only o
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!