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
zzz [600]
2 years ago
12

When fireworks explode, sound and light are produced. These are examples of

Physics
1 answer:
ki77a [65]2 years ago
6 0

Answer: Macroscoptic Output

Explanation:

Answers to the rest:

1. B) macroscopic outputs.

2.A) a microscopic change creating a macroscopic output

3.B) Because the energy levels of the electrons in different metals are usually not the same, different metals usually emit different colors of visible light.

4.A) Heat is applied to a solid, causing its molecules to move quickly.

5.A) strontium, sodium, copper, potassium

You might be interested in
The weight (W) of an object is the product of its mass (m) in kilograms and g, the acceleration due to gravity in meters/second2
Nookie1986 [14]
The weights in newtowns for the given masses are

<span> masses        22.1,                 33.5,             41.3,           59.2,            78
 weights        216.58N           328.3N       404.74N      580.16N     764.4N

e.g,   for m=22.1kg, W=22.1kgx9.8N/kg =216.58N</span>
7 0
3 years ago
I NEED HELP WITH THIS QUESTION ASAP PLEASE!
daser333 [38]
Wood isn’t a medium. Pls give brainliest
8 0
3 years ago
A spring scale has a spring with a force constant of 250 N/m and a weighing pan with a mass of 0.075 kg. During one weighing, th
mr Goodwill [35]

elasticity stretches and can also return to it's normal size ..

8 0
2 years ago
Over a time interval of 1.99 years, the velocity of a planet orbiting a distant star reverses direction, changing from +20.7 km/
madam [21]

Answer:

(a) - 42700 m/s

(b) - 6.8 x 10^-4 m/s^2

Explanation:

initial velocity of star, u = 20.7 km/s

Final velocity of star, v = - 22 km/s

time, t = 1.99 years

Convert velocities into m/s and time into second

So, u = 20700 m / s

v = - 22000 m/s

t = 1.99 x 365.25 x 24 x 3600 = 62799624 second

(a) Change in planet's velocity = final velocity - initial velocity

  = - 22000 - 20700 = - 42700 m/s

(b) Accelerate is defined as the rate of change of velocity.

Acceleration = change in velocity / time

                     = ( - 42700 ) / (62799624) = - 6.8 x 10^-4 m/s^2

8 0
3 years ago
A sound source is located somewhere along the x-axis. Experiments show that the same wave front simultaneously reaches listeners
galina1969 [7]

Answer:

Explanation:

As the source is situated on x - axis , it must be situated in between the two listeners .

So the x coordinate of source is

(-7 + 3 )/2

= - 2 m

The equation of the wave- front will be that o a circle having centre at (-2,0)

and radius = distance between -2 and 3 , that is 5 m

equation of circle

=( x+2 )² + y² = 25

It cuts y axis when x = 0

Putting x = 0

4 + y² = 25

y² = 21

y = + √21 , or - √21

7 0
3 years ago
Other questions:
  • Let at time t1 means?
    6·1 answer
  • A ball is thrown vertically upward with a speed v. an identical second ball is thrown upward with a speed 2v. how many times hig
    14·1 answer
  • A photon has an energy of 5.53 × 10–17 j. what is its frequency in s–1 (h = 6.63 × 10–34 j • s)?
    6·2 answers
  • True or false Sound waves do not require a medium in which to travel
    9·2 answers
  • Which two statements about an electric motor are true?
    8·2 answers
  • The early workers in spectroscopy (Fraunhofer with the solar spectrum, Bunsen and Kirchhoff with laboratory spectra) discovered
    7·1 answer
  • If a vibrating string is made shorter (i.e., by holding your finger on it), what effect does
    11·1 answer
  • What is the acceleration of a 32-kg object if a 6.75-N force is applied to it?
    9·1 answer
  • Ignoring air resistance, if a 20 kg ball and a 400 kg crate were both dropped from the
    6·1 answer
  • A worker pushes horizontally on a large crate with a force of 265.0 N and the crate moved 4.3 m. How much work was done?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!