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
jolli1 [7]
3 years ago
9

A substance did not change it's chemical nature in reaction which mostly likely describe the reaction

Physics
1 answer:
Ad libitum [116K]3 years ago
8 0
If the substance doesn't change chemically, it is a physical reaction.
You might be interested in
Which option correctly matches the chemical formula of a compound with its name?
77julia77 [94]

Answer:it’s A

Explanation:

4 0
3 years ago
Read 2 more answers
4. A motorist travels 406 km during a 9.0 hr period. What was the average speed in km/hr and m/s?
user100 [1]

Answer:

45.11 kmph and 12.530 m/s

Explanation:

Average speed = Total distance travelled / Total time taken

406/9 gives the answer in kilometers

And we convert it to m/s by multiplying it with 1000/3600

6 0
3 years ago
A 5.0-kg box rests on a horizontal surface. The coefficient of kinetic friction between the box and surface is ????K=0.50. A hor
blagie [28]

Answer:

a)W= 1 J

b)W= 1 J

c)W= 0 J

Explanation:

Given that

m = 5 kg

Coefficient of kinetic friction,K=0.5

d= 10 cm

We know that if velocity is constant it means that the acceleration of the system is zero.Or we can say that all forces are balance in the system.

We know that work is the dot product of force and displacement

W= F.d

The friction force on the box

Fr= K m g

Fr= 0.5 x 5 x 10 = 25 N                      ( take g =10 m/s²)

Fr=25 N

a)

Acceleration a= 0

So horizontal force F = Fr

W = Fr.d

W=10 x 0.1 J

W= 1 J

b)

The work done by friction force

W= 1 J

c)

The net force on the system is zero because acceleration is zero.

F= 0

So

W= 0 J

3 0
3 years ago
However, had it been a real sound, the sound's pitch would have been increased by the Doppler Effect, since the Falcon was movin
Inessa05 [86]
<span>The correct answer is: Towards

Explanation:
Doppler Effect is the apparent change in the frequency of a wave caused by the relative motion between the source of the wave and the observer. As the observer gets closer to the source, that observer will observe or sense the higher frequency of the wave (emitting by the source). Frequency in the case of sound waves is called the "sound's pitch." Therefore, the sound's pitch will increase if the Falcon moves towards the source of the sound. Hence, the correct option is "towards."</span>
3 0
3 years ago
Read 2 more answers
An 19.2-cm-long bicycle crank arm, with a pedal at one end is attached to a 20.6-cm-diameter sprocket, the toothed disk around w
Anon25 [30]

Answer:

0.0545 m/s2

Explanation:

19.2 cm = 0.192 m

We can convert rpm (revolution per minute) to angular velocity rad/s knowing that each revolution is 2π rad and each minute is 60 seconds.

57 rpm = 57 * 2π / 60 = 6 rad/s

86 rpm = 86 * 2π / 60 = 9 rad/s

The angular acceleration of the sprocket is the change in angular velocity per unit of time

\alpha = \frac{\Delta \omega}{\Delta t} = \frac{9 - 6}{10.7} = 0.284 rad/s^2

The tangential acceleration of the pedal is the product of its angular acceleration and the radius of rotation, aka the pedal arm length L = 0.192 m

a_T = \alpha*L = 0.284*0.192 = 0.0545 m/s^2

3 0
4 years ago
Read 2 more answers
Other questions:
  • Question 2.
    12·1 answer
  • A young's interference experiment is performed with blue-green laser light. the separation between the slits is 0.500 mm, and th
    7·1 answer
  • Please help .. there could be more than one answer to this question.
    13·1 answer
  • You are asked to explain what happens to individual atoms when a chemical change takes place in lab you are doing in class. What
    10·2 answers
  • What should you do if your boat capsizes answers?
    13·1 answer
  • The primary job of a(n) ______ on a receiver is to capture modified radio waves.
    12·2 answers
  • Whenever you watch a high-flying aircraft overhead, it seems that its sound comes from behind the craft rather than from where y
    9·1 answer
  • While sitting on the couch, I am pushing down on it and it is pushing up on me. Which of Newton's laws of motion is this demonst
    14·2 answers
  • What are the magnitude and direction of the acceleration of an electron at a point where the electric field has magnitude 6100 n
    5·1 answer
  • Which of the following statements is true of the strong nuclear force?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!