Which statement best describes a physical change?
A. Changes can occur to certain chemical properties of the substance, but the overall shape of the substance will remain the same.
B. Changes can occur to certain physical properties of the substance, but the overall shape of the substance will remain the same.
C. Changes can occur to physical properties of a substance, but the chemical composition of the substance remains the same.
D. Changes can occur to chemical properties of a substance, but the chemical composition of the substance remains the same.

Answers

Answer 1

Answer:

c. changes can occur to certain physical properties

Explanation:

got it right on test


Related Questions

Which of the following best defines the definition of a Newton (N)? *
0/1
The amount of force that would give a mass of one kilogram an acceleration of one meter per second per second

Kg * m/s².
Both answers above are correct.
A cookie with a fig fruit filling

Answers

The answer is: C - both answers above are correct.

Explanation:

The SI base units for newtons is: kg x m/s ².

When separated it is basically: the amount of force that one kilogram multiplied by one meter per second squared (this is the acceleration)

One Newton can be defined as the amount of force that would give a mass of one kilogram an acceleration of one meter per second per second.

What is force?

The definition of force in physics is: The push or pull on a massed object changes its velocity.

An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.

A spring balance can be used to calculate the Force. Newton is the SI unit of force.

From Newton's second law of motion: we know that:

Force = mass × acceleration

Now in SI system:

Unit of force is Newton.

Unit of mass is kg and unit of acceleration is meter per square second.

Hence, one Newton force can be defined as:

The required force to generate 1 meter per square second acceleration on an  object of mass one kilogram.

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1)
The red arrow is pointed at different locations of an atom of nitrogen Where is it pointing to the GREATEST concentration of
atomic mass?
A
B.
В
C

Answers

Answer:

A) A (displays the nucleus)

The Nucleus holds a majority of the mass within an atom

The Sun being the largest body has the highest gravitational pull on all planets however planets do not collapse into the sun this is because of A.gravitational I'll of the Earth B. gravitational pull among the planets C. gravitational pull of Moon D. the balancing force

Answers

Answer:

A:gravitational of the earth

Describe how a roller coaster works in terms of using potential energy and kinetic energy:

Answers

Answer:

Traditionally, the coaster cars are pulled up the first hill by a chain; as the cars climb, they gain potential energy.  Then, when the cars descend this hill, potential energy is again changed to kinetic energy. This conversion between potential and kinetic energy continues throughout the ride.

Explanation: hi how ya doing  

a matieral through which charges can flow through easily is known as what?

Answers

Answer:

the answer would be an electrical conductor

cho mạch như hình vẽ E
=
24
V
,

r
=
1
Ω

,

R
1
=
3
Ω
,

R
2
=
R
3
=
R
4
=
6
Ω

Answers

Answer:

A

Explanation:

John McRighteous has a mass of 90kg. Calculate johns weight.

Answers

Answer: W=M*gravity. 90 * 9.8=882N. That is the weight on Earth.

Explanation:

Calculating the weight is W=M*gravity. 90 * 9.8=882N. That is the weight on Earth.

Answer:

198.4 lbs

Explanation:

Is it possible to burn a paper using lens? How?​

Answers

Answer:

NO Y

Explanation:

MMMMMMMMM

solve this question please

Answers

Answer:

[tex]( \nwarrow^{ + }) \sum \: F_{{y_{A}}_{2kg}} = F_{{y_{N_A}}_{2kg}} - m_{{y_{A}}_{2kg}}g \cos( \theta_{{y_{A}}_{2kg}}) = 0 \\ F_{{y_{N_A}}_{2kg}} = m_{{y_{A}}_{2kg}}g \cos( \theta_{{y_{A}}_{2kg}})...(1) \\ ( \nearrow^{ + }) \sum \: F_{{x_{A}}_{2kg}} = F_{{x_{T}}} - m_{{y_{A}}_{2kg}}g \sin( \theta_{{y_{A}}_{2kg}}) -F_{{Fr}_{A2kg}}= m_{{y_{A}}_{2kg}}a...(2) \\ \\ ( \nearrow^{ + }) \sum \: F_{{y_{B}}_{5kg}} = F_{{y_{N_B}}_{2kg}} - m_{{y_{B}}_{5kg}}g \cos( \theta_{{y_{B}}_{5kg}}) = 0 \\ F_{{y_{N_B}}_{5kg}} = m_{{y_{B}}_{5kg}}g \cos( \theta_{{y_{B}}_{5kg}})...(3) \\ ( \searrow^{ + }) \sum \: F_{{x_{B}}_{5kg}} = m_{{y_{B}}_{5kg}}g \sin( \theta_{{y_{B}}_{5kg}})-F_{{x_{T}}} -F_{{Fr}_{B5kg}}= m_{{y_{B}}_{5kg}}a...(4)[/tex]

Explanation:

All you need to do is plug in the values and solve the simultaneous equations to find the acceleration a, and T.

Always draw the free body diagram...

a.
In what ways do human beings contribute to the greenhouse effect? Select all that apply.
by using renewable energy
b. by driving gas -powered cars
by studying extreme weather events
d. by making things out of plastic
C.

Answers

It should tell you everything with the link given by the teacher on the test/assignment. Just click the link provided and see which answer choices are on there.

Can someone please give me the answers to this? ... please ...

Answers

Answer:

See below:

Explanation:

What you have done seems to be correct, what we can do is just add a box into the center. For the 3rd question, we can just draw a box as nothing is happening. That is all!

Consider marking as brainliest if it helped!

Answer:

Explanation:

good luck

i think

PLEASE HELP I WILL MARK YOU
Scenario: On October 15, 1997, a car called
Thrust SSC set a new land-speed record. It
traveled 763 mph in 1 mile and became the first
car to officially break the sound barrier. The
Thrust SSC propels itself forward with two jet
engines made by Rolls-Royce, the same
engines found in the British version of the F-4
Phantom I fighter jet. The propulsion system
on the Thrust SSC is unique in that it does not
rely on the friction between the tires and the
ground for its forward motion. Instead, the jet
engines provide the force.

Question : Is it possible to make the Thrust SSC achieve an even higher maximum speed?

Directions: Use the information above and your
knowledge of Newton's second law of motion
to write a scientific explanation with at least
two modifications that you could make to the
car that would increase its acceleration. Be
sure to state a claim, provide mathematical
evidence (i.e. an equation or scientific
principle), and state your reasoning.

Thrust SC Specifications
Mass
10,700 kg
Maximum Speed
763 mph
Acceleration
20.8 m/s2
Fuel Burn Rate
4.8 gallons/s
Thrust Force
223,000 N

Answers

We want to see if the Trust SSC can archive a higher maximum speed.

Remember the second Newton's law:

Force = mass*acceleration.

And acceleration is the rate of change of the velocity.

Assuming the mass of the Trust SSC does not change, increasing the force would mean that we increase the acceleration, and thus, larger velocities can be reached.

Now there are some problems.

How we do increase the force?.

It is hard to ve precise, mostly because we don't really know how the system works, we just got some given random data that we can't use without context.

Another thing we need to remember, this velocity is measured in only one mile. So because we have a fixed distance to measure it, we only can get larger velocities by increasing the acceleration.

And to increase the acceleration we can increase the force, as discussed, or, decrease the mass.

How to decrease the mass? Using lighter materials.

Now let's see an example on how decreasing the mass would affect the acceleration.

Mass = 10,700kgAcceleration = 20.8 m/s^2

Then an aproximate force is given by:

F = 10,700kg*20.8 m/s^2 = 222,560 N

Now, if we decrease the mass a little bit, for example to 10,000kg, and we do not change the force, the new acceleration will be given by:

10,000kg*a = 222,560 N

a = (222,560 N)/(10,000kg) = 22.3 m/s^2

So decreasing the mass a little, increases the acceleration, which would make a larger maximum velocity.

Concluding, there are two ways of increasing the maximum velocity:

Increasing the force.

Decreasing the mass of the car.

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Which force allows you to speed up, slow down, and make turns?

Answers

Answer: Friction force

Happy To help ;)

Explanation:

Can someone please help me​

Answers

Answer:C (198 seconds)

Explanation: The cyclist makes the first lap in (180.00 - 6.00) = 174.00 seconds. The average time per lap for all three circuits is (600.00 - 6.00) = 594/3 = 198 seconds.

A large bottle contains a number of medicinal tablets is 0.5kg. Calculate the number of tablets in the bottle?

Answers

Answer:

the answer is 5k in the bottle have

an engineer is developing a conveyor belt to help move heavy boxes in factories. The device should be able to move boxes from the first floor to the second floor of a factory. The engineer is building a full- sized model to test her design.

Answers

Answer:

This conveyor belt should be connected to fixed pulleys in case their total effort is less than the load. But if it's not that, the belt should be connected to movable pulleys.

Explanation:

[tex].[/tex]

Answer:

this conveyer belt should be connected to fixed pulleys in case their total effort is less than the load . but if it's not that the belt should be connected to movable pulleys

Molly does not have many activities after school, so she has plenty of time to exercise. She has never been very athletic and plans to start by exercising two hours a day five days a week. Is this a good plan?


OPTIONS:

A.
Yes, she should dive right in.
B.
No, no one can exercise that much.
C.
Yes, if she has the time there is no excuse.
D.
No, smaller goals would be better.

PLEASE NO LINKS

Answers

The answer is D No, smaller goals would be better

Your car can brake with a deceleration of 6 m/s2. The car is initially going at 40 m/s.
a) How long will it take the car to come to a full stop?

b) If the car is 5 meters long, about how many car lengths should be kept between you and the car in front of you (assume the car in front of you comes to a stop immediately).

Answers

We have that for the Question "" it can be said that how long will it take the car to come to a full stop and the car lengths before a stop is

t=6.67L=27cars

From the question we are told

Your car can brake with a deceleration of 6 m/s2. The car is initially going at 40 m/s.

a) How long will it take the car to come to a full stop?  

b) If the car is 5 meters long, about how many car lengths should be kept between you and the car in front of you (assume the car in front of you comes to a stop immediately).

Generally the equation for the Velocity is mathematically given as

[tex]v=u+at\\\\Therefore\\\\40=0+6t\\\\t=6.667s\\\\[/tex]

b)

s=ut+1/2at^2

Therefore

[tex]S=0+1/2(6)(6.7)^2\\\\S=134.67m[/tex]

Therefore

The car lengths before a stop is

L=134.67m/5

L=27cars

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What is the displacement of the object from 2 seconds to 6 seconds
•4m
•8m
•16m
•24m

Answers

Answer:

,24m bolşi

Explanation:

dfgzffdsvh466ggsceaijtgcbnmzxygdcrescdrbniuyrlohahrcwehiim

Answer:

the answer is 16 m

hope this is helpful

(pls help me) Which event is an example of melting? A. Wax drips down the side of a lit candle. O B. Perspiration dries on a person's skin. O C. Rain turns to ice pellets. O D. A mirror fogs up when someone takes a hot shower.​

Answers

Answer:

A. is correct thanks for sharing your question

How many newtons does a 5-kg backpack weigh on Earth?

Answers

a 5kg backpack will weigh 49 newtons on earth

A motorboat accelerates uniformly from a velocity of 10.5 m/s to the west to a velocity of 6.5 m/s to the west. If its acceleration was 4.5 m/s2 to the east, how far did it travel during the acceleration

Answers

Answer:

7.4m ............................

According to the nebular theory, what early event eventually led to the formation of our solar system?​

Answers

Answer:Solar system formed about 4.6 billion year ago, when gravity pulled together low-density cloud of interstellar gas and dust (called a nebula)(movie). The Orion Nebula, an interstellar cloud in which star systems and possibly planets are forming. Initially the cloud was about several light years across.

Explanation:

Fuzzy and kermit
are driving at 10 m/s but slow down to meters per seconto avoid hitting a squirrel a time it takes in a slow down is 3.1 seconds what is the acceleration

Answers

Answer:

-2.9m/s[tex] { - 2.9ms}^{2} [/tex]

A 1-kilogram stone is being dropped from a bridge 100 meters above a gorge.

What is the weight of the stone?
A. 1 newtons B. 10 newtons
C. 100 newtons D. 1,000 newtons

Answers

Answer:

C. 100 NEWTONS

Explanation:

just my brain being ly = brainly is the name so my brian is being ly

The weight of the stone is 10N.

To find the weight of the stone, we need to know about the gravitational force on any object due to earth.

What is gravitational force?Gravitational force is a attractive force that arises between any two objects. The objects, on the earth surface or near the earth surface, experience the gravitational force of earth. This gravitational force is Known as the weight of the object. How can we calculate the gravitational force or the weight of an object, when it's near the earth surface?

When an object is near the earth surface, its weight is mass × gravitational acceleration (g).

So, the weight of the stone= 1kg × 10 m/s²

                            = 10 N

Thus, we can conclude that the weight of the stone 100 m above a gorge is 10N.

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Which is the best definition to describe a transfer of energy?
a)Changing energy from one form to another

b)The ability to do work and cause change

c)Stored energy or energy of position

d)The same form of energy moving from one place to another

Answers

Answer:

a

Explanation:

How long would it take a message sent as radio waves from earth to reach mars?

Answers

Answer:

[tex]longest \: dstance \: btw \: earh - mars \\ (150 + 230) \times {10}^{6} km \\ t = \frac{d}{c} \\where \: c \: is \: the \: speed \: of \: light \\ = \frac{380 \times {10}^{6} km}{3 \times { {10}^{5} }km. {sec}^{ - 1} } \\ \\ when \: mars \: is \: close \: to \: earth \\ ( 230 - 150) \times {10}^{6} km \\ t = \frac{d}{c} \\where \: c \: is \: the \: speed \: of \: light \\ = \frac{80 \times {10}^{6} km}{3 \times { {10}^{5} }km. {sec}^{ - 1} } [/tex]

Distance between gas molecules in the case of:
-Increase in temperature
-Decrease in temperature
-Increase in volume
-Decrease in volume
-Increase in pressure
-Decrease in pressure

Answers

Answer:

-Increase in temperature: increase

-Decrease in temperature: decrease

-Increase in volume: increase

-Decrease in volume: decrease

-Increase in pressure: increase

-Decrease in pressure: decrease

Explanation:

-Increase in temperature:

● Molecules gain kinetic energy and move fast thus increasing distance

-Decrease in temperature:

● Kinetic energy of molecules decrease so they have smaller distance

-Increase in volume:

● Molecules have more space to move around so distance increase

-Decrease in volume:

● Less space, molecules collide with each other because of decreased distance thus increasing pressure

-Increase in pressure

● Molecules collide with each other and the walls of container increasing pressure so molecules move faster and it increases distance

-Decrease in pressure:

● Molecules collide with each other and walls of container less frequently so distance between molecules decrease

the relative highness or lowness of a sound is called

Answers

The answer to this question is pitch

WHAT IS THE VOLUME OF A 5.71 G PLASTIC CUBE THAT HAS A DENSITY OF 1.15 G/CM3
DONT ANSWER i need to find out if it cant float or sink?!

Answers

Answer:

p>Whether an object will float or sink is dependent on its density, and on the density of the liquid it is placed in. In the case of water, an object with a density less than 1 g/cm3 will float. The closer its density is to 1 g/cm3, the more of it will sit below the water level.

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