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
kherson [118]
3 years ago
13

What reaction involves burning?

Physics
1 answer:
Alex_Xolod [135]3 years ago
6 0

Answer:

exothermic

Explanation:

An exothermic reaction is a chemical reaction that releases energy through light or heat. It is the opposite of an endothermic reaction. Expressed in a chemical equation: reactants → products + energy.

You might be interested in
What is strain?
Sholpan [36]

Answer:

C) The ratio of the change in an object's length to its original length when stretched or compressed.

Explanation:

The formula for strain is:

Strain = Change in Length/Origin Length

Hence, it can be described as the percentile of change in the dimension with respect to the original dimension. So, whenever a tensile or a compressive force is applied on a body, its length changes. The ratio of this change to original length is called strain. So, the correct option is:

C) <u>The ratio of the change in an object's length to its original length when stretched or compressed.</u>

3 0
3 years ago
Is hydrogen good conductor or poor conductor
m_a_m_a [10]

Answer:

Good one

Explanation:

Hydrogen has the highest thermal conductivity of any gas.

7 0
2 years ago
Read 2 more answers
A ventilating fan is operated by 0.5hp electric motor. How much work in joules can the fan do in 3 hours? (I need the answer asa
shtirl [24]

Answer:

Power= 0.5hp = 375W

T = 3hrs = 10800s

Power = Work done/ Time

Work = Power * Time = 375 * 10800 = 4050000J

3 0
3 years ago
The smallest detail visible with ground-based solar telescopes is about 1 arc second. How large a region (in km) does this repre
mestny [16]

Answer:

x = 727.5 km

Explanation:

With the conditions given using trigonometry, we can find the tangent

       tan θ = CO / CA

With CO the opposite leg and CE is the adjacent leg which is the distance from the Tierral to Sun

   

        D =150 10⁶ km (1000m / 1 km)

        D = 150 10⁹ m.

We must take the given angle to radians.

       1º  = 3600 arc s  

       π rad = 180º

       θ = 1 arc s (1º / 3600 s arc) (pi rad / 180º) =

       θ = 4.85 10⁻⁶ rad

That angle is extremely small, so we can approximate the tangent to the angle

     

       θ = x / D

       x = θ D

       x = 4.85 10-6  150 109

       x = 727.5 103 m

       x = 727.5 km

4 0
3 years ago
"A light beam incident on a diffraction grating consists of waves with two different wavelengths. The separation of the two firs
Fantom [35]

Answer:

A light beam incident on a diffraction grating consists of waves with two different wavelengths. The separation of the two first order lines is great if

the dispersion is great

6 0
3 years ago
Other questions:
  • If a 990 kg car is on the road and the Ff is 360 n what is the normal force
    5·2 answers
  • Fast Bullets A rifle with that shoots bullets at 420 m/s shoots a bullet at a target 49.8 m away. How high above the target must
    13·1 answer
  • The law of reflection establishes a definite relationship between the angle of incidence of a light ray striking the boundary be
    13·1 answer
  • Tim jogs a distance of 7.2 km to the west. Then he turns south and jogs 1.4 km. West is the resultant if Tim's jog back to the b
    6·1 answer
  • A car radio draws 0.18 A of current in the autos 12-V electrical system. (a) How much electric power does the radio use?
    14·1 answer
  • Which of the following is a chemical reaction? A. A spoon bending B. Wood burning C. Plates being stacked D. A book being opened
    15·2 answers
  • Plz answer this now anyone plz
    6·1 answer
  • When a reaction that occurs when a person experiences very strong emotion especially those associated with a perceived threat is
    15·1 answer
  • When the sun and moon pull at right angles to the earth wat kinda tide can yu expect
    12·1 answer
  • You are traveling at 55 mi/h along the x-axis relative to a straight, level road and pass a car that is traveling at 45 mi/h. Th
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!