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
Nadusha1986 [10]
3 years ago
7

Which of the following is a sign of a physical Change ?

Physics
2 answers:
guapka [62]3 years ago
7 0

C.) i believe because the change in shape is changing the physical appearance

galina1969 [7]3 years ago
5 0

<u>Answer:</u>

The correct answer option is C) A change in the shape of a substance.

<u>Explanation:</u>

Physical changes can be defined as the changes which affect the form of a chemical substance but not its chemical composition. These are the changes in which no bonds are broken or formed.

A change in the shape of a substance is a physical change because there is no change in composition of the substance chemically.

While all other options involve a change in chemical composition so they are not the examples of a physical change.

You might be interested in
A 2kg watermelon is dropped from a 4m tall roof a) use the appropriate kinematic equations to determine the instantaneous veloci
Ivenika [448]

Answer:

8.85m/s

Explanation:

The potential energy the watermelon held before dropping is Ep=mgh=2*9.8*4=78.4J.

When it strikes the ground, all of its Ep will transfer into Ek, so 1/2*m*v^2=78.4.

We already knew that m=2, so insert that in, we will get the V^2=78.4 m/s, V=8.85 m/s

6 0
3 years ago
A mass of 148 g stretches a spring 13 cm. The mass is set in motion from its equlibrium position with a downward velocity of 10
Charra [1.4K]

Answer:

u(t)=1.15 \sin (8.68t)cm

0.3619sec

Explanation:

Given that

Mass,m=148 g

Length,L=13 cm

Velocity,u'(0)=10 cm/s

We have to find the position u of the mass at any time t

We know that

\omega_0=\sqrt{\frac{g}{L}}\\\\=\sqrt{\frac{980}{13}}\\\\=8.68 rad/s

Where g=980 cm/s^2

u(t)=Acos8.68 t+Bsin 8.68t

u(0)=0

Substitute the value

A=0\\u'(t)=-8.68Asin8.68t+8.68 Bcos8.86 t

Substitute u'(0)=10

8.68B=10

B=\frac{10}{8.68}=1.15

Substitute the values

u(t)=1.15 \sin (8.68t)cm

Period =T = 2π/8.68

After half period

π/8.68 it returns to equilibruim

π/8.68 = 0.3619sec

6 0
3 years ago
At room temperature ice will melt while a brass lamp will stay as a solid. This must mean that the melting point of water is ___
UkoKoshka [18]
If solid, cold metal like brass doesn't melt at room temperature like ice does, than the bass can stand much more heat then a ice cube, so it needs to be hotter to melt, so the melting point of ice is lower then brass's melting point
4 0
3 years ago
Read 2 more answers
I will give brainliest if right
e-lub [12.9K]

Answer:

Prokaryotic Cells are cells that lack Cell Nucleus so the answer is bacteria

5 0
3 years ago
Read 2 more answers
Spiderman has a mass of 80 kg. He knows his webbing will break if it is exposed to a 200 N force. What is the maximum height he
likoan [24]

Answer:

This depends on the writers

if they want they can make spiderman deny the laws of nature

8 0
3 years ago
Other questions:
  • The table shows information about for objects resting at the top of a hill. Which object is on the tallest hill?
    7·2 answers
  • 2. Calculate the slope of the line in your graph of the square of the period of the pendulum vs. length of the string .Galileo f
    15·1 answer
  • if two waves with equal amplitudes and wavelengths travel through a medium in such a way that a particular particle of the mediu
    13·2 answers
  • A soccer ball of mass 0.4 kg is moving horizontally with a speed of 20 m/s when it is kicked by a player. The kicking force is s
    14·1 answer
  • Which diagram is the best representation of gas molecules in a closed container? A. Diagram A B. Diagram B C. Diagram C D. Diagr
    11·1 answer
  • If a cart of 4 kg mass has a force of 8 newtons exerted on it, what is its acceleration
    15·1 answer
  • The pedals on a bicycle give a mechanical advantage by allowing you to turn the pedals a __________ distance to turn the _______
    8·1 answer
  • Which of the following best describes gravitational potential energy,
    8·1 answer
  • PLEASE I NEED HELP CLICK ON THIS IMAGE
    10·1 answer
  • Explain how do single fixed and single movable Pulley make our work easier ​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!