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
LekaFEV [45]
3 years ago
9

Which of the following systems reflects a decrease in entropy? A. burning match B. freezing water C. evaporating alcohol D. brea

king glass **Thank you!!
Physics
2 answers:
Bad White [126]3 years ago
7 0
It would be B)  freezing water because this change gets less chaotic
torisob [31]3 years ago
4 0
The answer is B. because introducing heat to something (A and C) increases entropy, and so does breaking something (D)
You might be interested in
As a car accelerates its tires increase their angular velocity from 114 rad/s to 131 rad/s in 0.43 seconds. What is the angular
e-lub [12.9K]
I think it's 39.53

(please do calculate it. I am not completely sure)
5 0
3 years ago
Read 2 more answers
You throw a 20-n rock vertically into the air from ground level. you observe that when it is a height 15.4 m above the ground, i
gayaneshka [121]

I believe there are two things which we asked to find here:

1. its speed just as it left the ground

2. find its maximum height

 

Solutions:

1. We use the formula:

ΔKE = - ΔPE

where KE is kinetic energy = ½ mv^2, and PE is potential energy = m g h, Δ = change

Therefore:

½ m (v2^2 – v1^2) = m g (h1 – h2)

at initial point, point 1: h1 = 0, v1 = ?

at final point, point 2: h2 = 15.4 m, v2 = 24.2 m/s

½ (24.2^2 – v1^2) = 9.8 (0 – 15.4)

585.64 – v1^2 = -301.84

-v1^2 = 887.48

v1 = 29.8 m/s

So the rock was travelling at 29.8 m/s as it left the ground.

 

2. The maximum height (hmax) reached is calculated using the formula:

v1^2 = 2 g hmax

Rewriting in terms of hmax:

hmax = v1^2 / 2 g

hmax = (29.8)^2 / (2 * 9.8)

hmax = 45.3 m

Therefore the rock reached a maximum height of 45.3 meters.

4 0
3 years ago
Elena: Y ____________________ es Patricia López, mi mejor amiga.
deff fn [24]
A.eres(b.es)c.somos<span>d.son</span>
3 0
2 years ago
Read 2 more answers
It takes Serina 0.25 hours to drive to school. Her route is 16 km long. What is Serina’s average speed on her drive to school?
tankabanditka [31]

Answer:

17.78 m/s

Explanation:

Average speed is found by simply dividing the distance travelled by the time that it took to finish the trip. It's measured in meters per second (m/s), so first convert the quantities.

1 km = 1000 m, so 16 km is 16000 m

0.25 hours is 15 minutes. Since 1 minute is 60 seconds, then 15 minutes must be 900 seconds.

Thus:

average speed = total distance/total time = 16000 m / 900 s = 17.78 m/s

Hope this helps!

Brainliest please!

5 0
2 years ago
According to car and driver, an alfa romeo going 70 mph requires 177 feet to stop. assuming that the stopping distance is propor
nadezda [96]
Fewhdknhs fdddkp,'sadjofipw]e
7 0
2 years ago
Other questions:
  • Light-rail passenger trains that provide transportation within and between cities are capable of modest accelerations. The magni
    12·1 answer
  • In a compression wave, particles in the medium move
    7·2 answers
  • Photons are also known as beta particles. (true or false)
    7·1 answer
  • 6x+y=6 <br> 8x-2y=-1 <br><br> con solución de sistemas de ecuaciones por favor
    7·1 answer
  • What do telescopes detect that assists astronomers making discoveries in space
    14·1 answer
  • In order to rendezvous with an asteroid passing close to the earth, a spacecraft must be moving at 8.50×103m/s relative to the e
    9·1 answer
  • What steps are involved in converting potential energy to kinetic energy, or kinetic energy to potential energy?
    5·1 answer
  • A motorcycle stunt driver zooms off the end of a cliff at a speed of 41.9 meters per second. If he lands after 1.62 seconds, wha
    5·1 answer
  • A 3.2 kg ball that is moving straight upward has 17 Joules of kinetic energy. The total mechanical energy is 25 Joules.
    7·1 answer
  • 2. What is the mass of an object if it accelerates at 3 m/s2 and has a force of 1 N?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!