Which of the following is an example of a physical change?


Burning charcoal.

Dissolving sugar in water.

Cooking a hamburger.

Car Rusting.

Answers

Answer 1

Answer:

Dissolving sugar in water is an example of a physical change .

.......


Related Questions

Who has greater displacement, an astronaut who has just completed an orbit of the earth or you when you have just traveled from home to school?

Answers

Answer:

Explanation:

This is going to sound like an absurd answer, but sometimes physics can be a little strange.

This answer is weird because of the definition of displacement. It means the distance from the starting point to the ending point, disregarding what happened in between. The point is that the astronaut is at the starting point of his orbit. By definition the starting and ending points are the same. His displacement is 0.

So the answer is you have the greater displacement when you walked one way to school.  The starting point and the ending point are different. You have gone further.

However just to make things a little nasty, when you walk home again, your displacement will be the same as the astronaut's -- 0 meters because you will be right back where you started from.

You that just traveled from home to school has greater displacement than the astronaut.

Displacement is defined as the change in the position of an object.

An astronaut who completed an orbit of the earth, has moved from an initial position x₁ and returned to the same position x₁ because Earth is assumed to be spherical. To complete an orbit of the Earth, the astronaut must return to his initial position since he will move round the Earth.

The displacement of the astronaut is zero because x₁ - x₁ = 0

For you that have just traveled from home to school, BUT haven't returned, your displacement is greater,.

Let's say the distance from your home to school = y

Your initial position at your home = 0

your displacement = y - 0 = y

Thus, you that just traveled from home to school has greater displacement than the astronaut.

Learn more here:https://brainly.com/question/10726676

The average speed, correspondence to the average speed in a trajectory. True or false?

Answers

Answer:

hablo españolete telo ease

Explanation:


Select the best answer for the question.
17. How many mL of HEPARIN 10,000 units/mL are needed for a 7,000 unit dose?
O A.0.7
O B. 0.07
O C.7
O D. 0.007

Answers

The answer is 7 because if it has zero at the beginning then its a lower number

0.7 mL of HEPARIN 10,000 units/mL is needed for a 7,000 unit dose.

To calculate the volume of HEPARIN 10,000 units/mL needed for a 7,000 unit dose, we can use the formula:

Volume (mL) = Dose (units) / Concentration (units/mL)

Given that the dose is 7,000 units and the concentration of HEPARIN is 10,000 units/mL, we can plug these values into the formula:

Volume (mL) = 7,000 units / 10,000 units/mL

Volume (mL) = 0.7 mL

So, 0.7 mL of HEPARIN 10,000 units/mL is needed for a 7,000 unit dose. However, none of the provided answer choices match exactly with 0.7 mL. The closest option is B. 0.07 mL, which is one-tenth of 0.7 mL. Therefore, the correct answer is B. 0.07 mL.

To learn more about HEPARIN, here

https://brainly.com/question/31118361

#SPJ2

is lightning man-made or Natural occuring?
claim:
give scientific reason:
evidence:​

Answers

Answer:

give me brainliest

Explanation:

Lightning is a naturally occurring electrostatic discharge during which two electrically charged regions, both in the atmosphere or with one on the ground, temporarily equalize themselves, causing the instantaneous release of as much as one gigajoule of energy. ... Humans have deified lightning for millennia.  

Lightning happens when the negative charges (electrons) in the bottom of the cloud are attracted to the positive charges (protons) in the ground.

1. A leftward force is used to pull a large wagon. In the wagon there is an unknown mass
that makes it very difficult to move, but a force applied is able to set the wagon into
constant motion. Let the force applied to the wagon and its unknown mass be 77.3 N. The
coefficient of friction between the wagon's wheels and the floor is 0.011. Determine the
mass of the wagon if it was empty.
i. Let's say that the unknown mass in the wagon is 95.5% * mass of the
wagon. What is the weight of the wagon when its empty and what is the
weight of the unknown mass?

Answers

Answer:

Wagon weight 366.41314(9.81) = 3,594.5129 = 3590 N

Load weight 349.9245(9.81) = 3,432.75982 = 3430 N

Explanation:

Let's assume the surface and the applied force are horizontal.

At constant motion, the friction force must balance the applied force

(from F = ma)

Ff = 77.3

μΝ = 77.3

μmg = 77.3

m = 77.3 / (0.011(9.81))

m = 716.3376... kg

Let M be the mass of the wagon

M + 0.955M = 716.3376

M(1.955) = 716.3376

M = 366.41314...kg

0.955 M = 349.9245... kg

round to the three significant digits of the question numerals.

two masses m and 2m, approach each along a path at right angles to each other. after collision, they stick together and move off at 2m/s at angle 37° to the original direction of the mass m. what were the initial speeds of the two particles​

Answers

Explanation:

the answer is in picture

what is suvat in physics ?​

Answers

"SUVAT" is an acronym from the variables:

S = displacement,
U = initial velocity,
V = final velocity,
A = acceleration,
T = time.

Pls give me a brainliest if this helped thx

I need some help, this is going to be late.​

Answers

Answer:

gravitational force

Explanation:

since they seem like they are falling, gravity usually pulls them down

i think its gravitational force

gravitational force!! goodluck

Driving home from school one day, you spot a ball rolling out into the street . (See the figure below) You brake for 1.50 s , slowing your 950-kg car from 16.0 m/s to 9.50 m/s.

a)What was the magnitude of the average force exerted on your car during braking?

b)What was the direction of the average force exerted on your car during braking?

c)How far did you travel while braking?

Answers

Answer:

a) 4116.67 N

b) negative (assuming car is traveling in positive direction)

c) 19.125 m

Explanation:

Part A)

We can find the average force exerted on the car by using Newton's 2nd Law: F = ma.

We have the mass (950 kg) but we do not have the acceleration. Let's solve for this using kinematics.

We have the time during braking, the initial and final velocity, and we need to find the acceleration. To do this, we can use the following equation: v = v₀ + at.

v (final velocity) = 9.50 m/sv₀ (initial velocity) = 16.0 m/st (time) = 1.50 s a = ?

Substitute these values into the equation.

v = v₀ + at9.50 m/s = 16.0 m/s + a (1.50 s) 9.50 = 16.0 + 1.50a -6.50 = 1.50a a = -4.333333... m/s²

The car's acceleration during the braking period is -4.33 m/s², assuming the car is traveling in the positive direction.

Now, we can use this to plug into Newton's 2nd Law to find the force exerted on the car.

F = maF = (950 kg) (-4.33...) F = -4116.666667 N

The magnitude of the average force exerted on the car while braking is the absolute value, so it is 4116.67 N.

Part B)

The direction of the average force is denoted in the negative sign. It is opposite the direction of the car's motion. Assuming that the car is traveling in the positive direction, the direction of the average force exerted on the car is in the negative direction since this force is slowing the car down while braking.

Part C)

We can find the distance traveled during the braking period by using another kinematic equation.

We have the initial and final velocity, and the time traveled, so we can use this equation: Δx = v_avg · t.

Note that v_avg is the same thing as (v + v₀) / 2.

Substitute the known values into the equation.

Δx = [(9.50 + 16.0)/2] · 1.50 Δx = 12.75 · 1.50Δx = 19.125 m

The car traveled 19.125 m while braking.

What is a Standard Unit? Give 3 examples

Answers

Answer:

The standard (metric) units that would be discussed at primary school would include: grams and kilograms, centimetres, metres and kilometres, millilitres and litres (though children also learn about imperial units in Year 5 maths).

Answer:

Standard units are commonly used units of measurement. For an example; grams and kilograms, centimetres.

Help meh in this question​

Answers

Radius=r=R_o/2angular velocity=w=v_omass=m

We know

[tex]\boxed{\sf K.E=\dfrac{1}{2}mv^2}[/tex]

For Rotational motion

[tex]\boxed{\sf v=r\omega}[/tex].

Putting value

[tex]\\ \qquad\quad\sf{:}\dashrightarrow K.E=\dfrac{1}{2}m(r\omega)^2[/tex]

[tex]\\ \qquad\quad\sf{:}\dashrightarrow K.E=\dfrac{1}{2}mr^2\omega^2[/tex]

[tex]\\ \qquad\quad\sf{:}\dashrightarrow K.E=\dfrac{1}{2}m\left(\dfrac{R_o}{2}\right)^2v_o^2[/tex]

[tex]\\ \qquad\quad\sf{:}\dashrightarrow K.E=\dfrac{1}{4}mv_o^2[/tex]

If a body travels 18 km in 1 hrs, find the average velocity of the body in m/s

Answers

Answer:

Explanation:

18 km/hr (1000 m/km)(1 hr/3600 s) = 5 m/s

Se lanza un dado 19 veces con las siguientes lecturas 5,1,3,3,6,2,6,4,5,2,1,2,5,3,2,6,1,4,4
Cuál es el promedio de las lecturas obtenidas?
Cuál es la tirada que más se repite (moda)?
Cuál es el mayor valor intermedio de todas las lecturas, ordenas estás de menor a mayor (mediana)?

Answers

Teniendo en cuenta la definición de media, mediana y moda:

el promedio de las lecturas obtenidas es 3,42la tirada que más se repite es 2.el mayor valor intermedio de todas las lecturas es 3.

La media (también llamada promedio o media aritmética) de un conjunto de datos es una medida de posición central cuyo valor se obtiene al dividir la suma de todos los números entre la cantidad de ellos. Entonces, en este caso, el promedio de las lecturas obtenidas se calcula como:

[tex]Promedio=\frac{5+1+3+3+6+2+6+4+5+2+1+2+5+3+2+6+1+4+4}{19}[/tex]

Resolviendo:

Promedio= 3,42

El promedio de las lecturas obtenidas es 3,42.

Por otro lado, la moda de un conjunto de números es el número que aparece más a menudo dentro del grupo de datos.

En este caso, podes observar que la cantidad de veces que aparece cada número es:

1: 3 veces2: 4 veces3: 3 veces4: 3 veces5: 3 veces6: 3 veces

Debido a que el 2 es el número con mayor cantidad de repeticiones, la tirada que más se repite es 2.

Por último, la mediana es valor que se encuentra en la mitad justa entre los valores máximo y mínimo de los datos con los que se está trabajando; es decir, que al ordenar los número de menor a mayor, éste se encuentra justamente en medio de los valores.

En este caso, ordenando de menor a mayor las lecturas del dado:

1,1,1,2,2,2,2,3,3,3,4,4,4,5,5,5,6,6,6

se observa que el valor el mayor valor intermedio de todas las lecturas es 3.

Aprende más con estos ejemplos:

https://brainly.com/question/24086990?referrer=searchResultshttps://brainly.com/question/15969676?referrer=searchResultshttps://brainly.com/question/17010976?referrer=searchResults

An acetate rods rubs against a cloth. What type of charge will the rod end up with?
A. Positive
B. Negative
C. Not enough info
D. Neutral

Answers

Answer:

I believe it's A

Explanation:

........

principle of electroplating​

Answers

dnxjjc cjgnjgjnffjnfkfmgkcknsmksjs dmxmcmfkcnfjcnfjfnfjf in jfnfifnfifnf

Answer:

Electroplating is the method of depositing one metal over another in the presence of a metal salt (in aqueous solution). The water molecule is released as the final product in this process. As a consequence, electroplating is based on the theory of hydrolysis.

A probability of breaking a tree is more than a short one during storm.why?

Answers

Answer:

Due to interia of motion

As we know, the turning effect of force is directly proportional to the perpendicular distance from the fixed point. Which means it is easier to turn a taller/longer object about its fixed point. That is why taller trees break more often than shorter ones.

Two unequal masses m and 2m are attached to a thin bar of negligible mass that rotates about an axis perpendicular to the bar. When m is a distance 2d from the axis and 2m is a distance d from the axis, the moment of inertia of this combination is "I". If the masses are now interchanged, the moment of inertia will be:_______
A) 2/3 I,
B) I ,
C) 3/2 I ,
D) 2 I ,
E) 4 I

Answers

Answer:

C) 3/2 I

Explanation:

Initial condition

I = m(2d)² + 2m(d²)

I = 4md² + 2md² = 6md²

swap masses

I' = 2m(2d)² + m(d²)

I' = 8md² + md² = 9md²

I'/I = 9md²/6md² = 3/2

I' = 3/2I

This is a model that describes how much energy is transferred from one trophic
level to the next.
energy pyramid

food web

food chain

trophic level

Answers

I agree with the person above me I think it’s food chain but I’m not 100% sure

https://www.sejda.com/share/9b04616a77ac4036b81482bc0eb0c97e-xPfTATV8BFmxDGQYW19Vcgybzs21Y2Xo6rIM9TMccWTC6a3xzld8Z9xOlsaB7IQY

Answers

Answer:what is your Question

Explanation:

b. What is measurement? Why measurement is important in our daily life? 3 Write the sunits of electric current and​

Answers

Explanation:

Please mark me as brainlyest

Answer:

- Measurement is a comparison of an unknown quantity with a known fixed quantity of the same kind. The value obtained on measuring a quantity is called its magnitude. Magnitude of a quantity is expressed as numbers in its units.

- Measurements play an important role in daily life because they are useful to do basic tasks, such as take a child's temperature with a thermometer, make time estimations, measure out medicine and find weights, areas and volumes of different materials or substances.

- Electrical Parameter Measuring Unit Unit/Symbol

Voltage                               Volt                    V or E

Resistance                       Ohm                    R or Ω

Current                               Ampere             I or i

Capacitance                       Farad              C

Explanation:

I'm not sure but hope it helps.

How much time does a train take to travel1800 km if it's velocity is 90km/hr

Answers

Explanation:

Time= Distance÷Velocity

Time= 1800÷90

Time= 20 hr

20×60= 1200 min

What is the velocity of an object that moves from 73 m to 62 m in 15 s?

Answers

Answer:

Below

Explanation:

You can use this formula to find the velocity of an object

     velocity = displacement / change in time

For this problem, we need to find displacement first

To find displacement all you need to do is find the difference between the two distances!

So our displacement here would be

     73 - 62 = 11 m

Now that we have displacement we can find velocity

      velocity = 11 / 15

                    = 0.733333....

                    = 0.73 m/s

Hope this helps! Best of luck <3

The velocity of an object that moves from 73 m to 62 m in 15 s is 0.73 m / s.

What is velocity?

When an item is moving, its velocity indicates how quickly its location is changing as seen from a specific point of view and as measured by a specific unit of time.

If a point travels a specific distance along its path in a predetermined amount of time, its average speed throughout that time is equal to the traveled distance divided by the travel time. For instance, a train traveling 100 km in two hours is moving at an average speed of 50 km/h.

Given:

The distance of the object = 73 m to 62 m,

The time taken by the object, t = 15 s,

Calculate the displacement of the object = 73 - 62 = 11 m

Calculate the velocity by the formula given below,

[tex]v = d /t[/tex]

v = 11 / 15

v = 0.73 m / s

Therefore, the velocity of an object that moves from 73 m to 62 m in 15 s is 0.73 m / s.

To know more about velocity:

https://brainly.com/question/19979064

#SPJ2

2. Calculate the force applied if 200 Pascal pressure is en the area of 0.2m”.​

Answers

Pressure=200PaArea=0.2m^2

[tex]\\ \sf\longmapsto Pressure=\dfrac{Force}{Area}[/tex]

[tex]\\ \sf\longmapsto Force=Pressure(Area)[/tex]

[tex]\\ \sf\longmapsto Force=200(0.2)[/tex]

[tex]\\ \sf\longmapsto Force=40N[/tex]

An 8-ohm resistor is connected to a 120-volt circuit. What current will it draw?

Answers

Answer:

15 A (15 amperes of current)

Explanation:

From Ohm's Law,

Voltage, V = Current, I × Resistance, R

Making Current, I the subject:

Current, I = Votage, V/ Resistance,R

= V/R

= 120volts /8ohms

= 15 A

If you have completely polarized light of intensity 150 W/m2, what will its intensity be after passing through a polarizing filter with its axis at an 89.0º angle to the light’s polarization direction?

Answers

Answer:

0.04569 W/m^2

Explanation:

I=150cos^2(89.0)

=0.04569W/m^2

You push yourself on a skateboard with a force of 30 N east and accelerate at 0.5 m/s² east. Find the mass of theskateboard if your mass is 58 kg.​

Answers

Answer:

2Kg

first you find the total mass of both the person und skateboard

f = m*a

30 = m* 0.5

m= 30/ 0.5

m= 60 kg

then you subtract the mass of the person from the total mass

m1 - m2

60 - 58

= 2 kg

Taking into account the Newton's second law, the mass of the skateboard is 2 kg.

Newton's Second Law establishes the relationship between the forces acting on an object and the acceleration it experiences. This law says that the acceleration that an object experiences when subjected to a net force (force applied to the body) is proportional to that force.

Mathematically, Newton's second law is expressed as:

F= m×a

where:

F = Force [N] m = Mass [kg] a = Acceleration [m/s²]

In this case, you know:

F= 30 N m= ? a= 0.5 m/s²

Replacing:

30 N= m× 0.5 m/s²

Solving:

m= 30 N÷0.5 m/s²

m= 60 kg

The mass of the sistem is the sum of the mass of the skateboard and the mass of the mass of your body:

Mass= mass of the skateboard + mass of your body

In this case:

60 kg= mass of the skateboard + 58 kg

Solving:

mass of the skateboard= 60 kg - 58 kg

mass of the skateboard= 2 kg

Finally, the mass of the skateboard is 2 kg.

Learn more about the Newton's second law:

brainly.com/question/23845187?referrer=searchResults brainly.com/question/13959891?referrer=searchResults

In Bohr's atomic theory, when an electron moves from one energy level to another energy level more distant from the nucleus: Select one: a. Energy is emitted. b. Energy is absorbed. c. No change in energy occurs d. Light is emitted. e. None of these.

Answers

(b)

Explanation:

Energy levels farther from the nucleus represent higher energies. Therefore, in order for the electrons to reach these levels, they must absorb additional energies first before they can make the jump.

what are the different systemsof units. plz help me don't scam ​

Answers

fundamental UNIT AND DERIVED UNIT

Explanation:

THERE ARE TWO TYPE OF UNIT

1 FUNDAMENTAL UNIT = THE UNIT OF PHYSICAL QUANTITY LIKE METRE SECOND ETC IS FUNDAMENTAL UNIT.

2 DERIVED UNIT=THE UNIT OF DERIVED PHYSICAL QUANTITY LIKE PASCAL ,NEWTON ETC IS DERIVED UNIT

Commenting so you can give the other user brainliest!

The type of force that will not cause a change in the speed of an object.

Answers

Explanation:

Balanced forces will cause no change in the speed of an object.

If the toy car weighs 250g and has a kinetic energy of 2.0 J, what is its velocity

Answers

Explanation:

Kinetic energy (J) = 2j

mass= 250g

velocity=?

1kg=1000g

mass= 250/1000

mass=0.25kg

Kinetic energy (J) = ½ x mass (kg) x [velocity]² (m/s)

2=1/2 × 0.25× [velocity]²

2=0.125× [velocity]²

[velocity]² = 2/0.125

[velocity]²=16

velocity= (16)^1/2

velocity= 4 m/s

Other Questions
If a box car racer is traveling at 23.6 miles per hour on a downhill track, how many seconds will it take for the racer to travel 20 meters Review your draft for pacing and sentence variety. Choose one sentence to revise either the pacing or sentence structure. In the space provided, list your original sentence, the revision, and an explanation of why you chose to revise that sentence. (Please put exact answer from Edmentum or Plato)Narrative:Rochelle sipped on her third mug of French roast with a twist of hazelnut as she waited for Marigold. She remembered that Marigold was always on time. So where was she? Rochelle picked up the yearbook that she had brought with her. Marigold, a girl with flaming red hair and large hazel eyes, was standing next to her in the photo. Even then, Marigold was a bit of a mystery to Rochelle.Rochelle was lost in thought when someone tapped her on her shoulder. She was surprised to find that the hand belonged to a police officer. He asked her if she knew Marigold. When Rochelle said yes, he handed her a package wrapped in paper. Rochelle was confused and scared. Was something wrong with her friend? "Is she okay? I just spoke to her," Rochelle whispered."Im her brother," said the officer. Thats when Rochelle noticed the same hazel eyes. "She sent something special for you.""But where is Marigold?" cried Rochelle. The man calmed her and asked her to open the package. Rochelle unwrapped it. Inside was an envelope containing an airplane ticket to Barcelona and a note.Rochelle didnt know what to do. The officer smiled, turned around, and left. Rochelle read Marigolds note and smiled. Rochelle remembered the day both of them had planned to go to Spain. The girl with the hazel eyes was making that dream come true. ANSWER ASAP!!! BRAINLIEST AWARDED It take 5 minutes to help a restock an area. How much areas can you restock in 50 minutes? Please let me know fast there are 16 marbles in a bag 12 of them are blue and 4 are yellow. what is the probability of picking a blue marble then a yellow marble without replacing the first one11/203/71/5 You and your friend read a book about three animals that travel hundreds of miles to find their way back home. They face danger, illness, and injury, yet eventually arrive alive to greet their heartsick owners. Which of the following is the main idea of this book? Three animals on a journey Three animals with superpowers Three animals run away for an adventure Three animals risk their lives to return home Any tips on how to sing? Find the slope that is PARALLEL and PERPENDICULAR to the equation of the line y = -1/2x+6. What season comes before spring Unscramble the following words and use the first letter of each answer to get the code! Sets question with option answers. Help please I WILL MARK BRAINLIEST! Solve for X and Y after he had waited an hour, mr jones received a telephone call directing him to go at once to a certain motel room subordinate clause and clause type Please no links please, they dont work :) what sentence is. the book which I lost last week has been found Which of the following types of compounds is unlike the other three?A waxB saturated fatC phospholipidD polysaccharide The number of flowers that grow on a plant as a result of the fertilizerapplied, is considered which of the following? *5 pcDependent variableIndependent variableControl variableI NEED THIS TOO Thirteen different SSR loci are used by the FBI to perform DNA fingerprinting. If SNP loci were assayed instead to identify individuals, which of the following would be true?a. Fewer than 13 SNP loci would need to be assayed. b. Many more than 13 SNP loci would need to be assayed. c. All SNP loci could be genotyped, just as all SSRS are, by electrophoresis of a PCR product. d. SNP loci, because they are usually biallelic, cannot be used to identify individuals. e. Using SNPs instead of SSRs, only carriers of disease alleles could be identified. f. Using SNPs instead of SSRs, only non-anonymous SNP loci could be assayed. what is the slope of the line HELP PLS HELP HELP WILL MAKE BRAINLIEST