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
Nat2105 [25]
3 years ago
7

What can you observe to know that when clear methane gas is burned it is a chemical change?

Physics
1 answer:
aalyn [17]3 years ago
6 0
<span>4) Formation of a gas

When methane burns, it produces the gases water vapor and carbon dioxide.
</span><span />
You might be interested in
blank refers to the method of spreading fertilizer evenly over the entire field by hand it is done at the blank stage
Andrej [43]

Answer:

Broadcasting is the method, not sure about the stage it is done in

Explanation:

8 0
3 years ago
A radio telescope has a circular collecting dish of diameter 5.0 m. It is used to observe two distant
Likurg_2 [28]
Skskdidododododoorrororo
3 0
2 years ago
A ship leaves the island of Guam and sails a distance 255 km at an angle 49.0 o north of west. Part A: In which direction must i
kiruha [24]

Answer:

Explanation:

We shall represent displacement in vector form .Consider east as x axes and north as Y axes west as - ve x axes and south as - ve Y axes . 255 km can be represented by the following vector

D₁ = - 255 cos 49 i  + 255 sin49 j

= - 167.29 i + 192.45 j

Let D₂ be the further displacement which lands him 125 km east . So the resultant displacement is

D = 125 i

So

D₁ + D₂ = D

- 167.29 i + 192.45 j + D₂ = 125 i

D₂ = 125 i + 167.29 i - 192.45 j

= 292.29 i - 192.45 j

Angle of D₂ with x axes θ

tan θ = -192.45 / 292.29

= - 0.658

θ = 33.33 south of east

Magnitude of D₂

D₂² = ( 192.45)² + ( 292.29)²

D₂ = 350 km approx

Tan

7 0
3 years ago
A sled starts off with an initial velocity of 8 m/s and slows down to 2 m/s after 3 seconds. What was its acceleration?
melomori [17]

Answer:

-2m/s

Explanation:

3 0
2 years ago
The initial kinetic energy imparted to a 0.25 kg bullet is 1066 J. The acceleration of gravity is 9.81 m/s 2 . Neglecting air re
lubasha [3.4K]

Answer:

The range of the bullet is 0.435 kilometers.

Explanation:

According to the problem, maximum height is equal to the range of the bullet. That is:

\Delta x = \Delta y

Where:

\Delta x - Range of the bullet, measured in meters.

\Delta y - Maximum height of the bullet, measured in meters.

By the Principle of Energy Conservation, gravitational potential energy reaches its maximum at the expense of the initial kinetic energy. That is to say:

K_{1} = U_{2}

Where:

K_{1} - Kinetic energy at point 1, measured in joules.

U_{1} - Gravitational potential energy at point 2, measured in joules, and:

U_{2} = m\cdot g \cdot \Delta y

Where:

m - Mass of the bullet, measured in kilograms.

g - Gravitational constant, measured in meters per square second.

The maximum height is now cleared:

K_{1} = m\cdot g \cdot \Delta y

\Delta y = \frac{K_{1}}{m\cdot g}

If K_{1} = 1066\,J, m = 0.25\,kg and g = 9.81\,\frac{m}{s^{2}}, the maximum height is now computed:

\Delta y = \frac{1066\,J}{(0.25\,kg)\cdot \left(9.807\,\frac{m}{s^{2}} \right)}

\Delta y = 434.791\,m

\Delta y = 0.435\,km

Lastly, the range of the bullet is 0.435 kilometers.

3 0
3 years ago
Other questions:
  • Which of the following instruments is not typically an electronic instrument, but could be enhanced with the help of microphones
    7·2 answers
  • A ball has mass of 140g. what is the force to accelerate the ball at 25m/s
    9·2 answers
  • A heat engine operating between energy reservoirs at 20?c and 600?c has 30% of the maximum possible efficiency.
    7·1 answer
  • A chemist has two compounds that do not chemically react. He thinks that by finding the right catalyst, he can get them to react
    15·1 answer
  • Name four factors that affect local, regional climates?
    5·2 answers
  • BRAINLIEST. Agraph is probelow. The graph shows the speed of a car traveling east over a 12 second period. Based on the informat
    6·2 answers
  • A car travels 1000 meters in 5 seconds. What is its average velocity?
    8·2 answers
  • A baseball is thrown off of a building with an initial velocity of 17 m/s and lands 2.3 seconds later. How tall is the building?
    9·1 answer
  • Using energy considerations, calculate the average force a 60.0-kg sprinter exerts backward on the track to accelerate from 2.00
    8·1 answer
  • The wave speed is 37 m/s and the wavelength is 4 m, what is the frequency?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!