A student placed a short candle and a slightly taller candle in a small dish filled with baking soda as
shown in the figure. The child then lights both the candles and poured vinegar into the dish of baking
soda.
Baking Soda +
Vinegar
(a) What happens to the candles? Why? In what order?
(b) Mention one precaution the student needs to follow while pouring the vinegar into the dish of
baking soda.
Answers
a) As carbon dioxide is formed the shorter candle's flame goes off first, followed by the taller candle. This shows, that in absence of air, the flame goes off. Hence, the air is necessary for combustion.
b) Although both reactants are common home chemicals and foods, care should be taken to avoid splashing in the eyes, and protective clothing should be used. The reaction's byproducts can be disposed of by thoroughly filling the sink with water and washing down the sink with no chemicals touched.
Baking soda and vinegar react with one another to create carbon dioxide gas. The carbon dioxide gas sinks to the bottom of the bowl because it is heavier than the air around it. More and more carbon dioxide gas is produced as the reaction progresses, progressively filling the bowl as it does so. The flame will go out owing to a shortage of oxygen once the level of carbon dioxide reaches that of the flame.
Learn more about the necessity of air for combustion here:
https://brainly.com/question/334789
#SPJ9
Related Questions
If 120 n of force is applied to a crate to move it 15 m, how much work is done?1,000 j1,800 j2,000 j2,500 j.
Answers
The formula Work = Force x Distance can be used to calculate the amount of work done. In this case, the applied force is 120 N, and the distance traveled is 15 m.
Work equals Force x Distance = 120 N x 15 m = 1800 J
As a result, the answer is 1,800 J.
It is important to remember that work is a scalar quantity whose value is determined by the direction of the force and displacement. The work done is positive if the force and displacement are both in the same direction. If they are pointing in opposite directions, the work is negative. Because the force and displacement are both in the same direction in this case, the work done is positive.
To Learn More About Distance Click
https://brainly.com/question/15172156
#SPJ4
giving brainlist
fill in the blank
Gear trains balance and
I will report you if needed so don't make a stupid reply
Answers
Answer:
spin the weals on the train
Explanation:
as a marble with a diameter of 1.6 cm rolls down an incline, its center moves with a linear acceleration of 3.3 m>s2 . (a) what is the angular acceleration of the marble? (b) what is the angular speed of the marble after it rolls for 1.5 s from rest?
Answers
(a) The angular acceleration of the marble is 12.89 rad/s^2. (b) The angular speed of the marble after 1.5 s is 19.34 rad/s.
The formula for linear acceleration is a = r * α, where r is the radius of the marble and α is the angular acceleration. Since the diameter is given, r = 0.8 cm or 0.008 m. Thus, α = a/r = 3.3 m/s^2 / 0.008 m = 412.5 rad/s^2.
The formula for angular speed is ω = ω0 + α*t, where ω0 is the initial angular speed (0 since it starts from rest), α is the angular acceleration calculated in part (a), and t is the time elapsed (1.5 s). Thus, ω = 0 + 412.5 rad/s^2 * 1.5 s = 618.75 rad/s. However, this is the angular speed at the end of the incline. To find the overall angular speed, we need to use the formula ω^2 = ω0^2 + 2*α*θ, where θ is the angle of the incline. Since it is not given, we cannot calculate the final angular speed accurately.
Learn more about angular speed here:
https://brainly.com/question/31489025
#SPJ11
3. What is a consideration when forcing interior walls?
A.
C.
D.
The wall coverings often hide interior metal framing.
The walls may be load-bearing and affect structural integrity.
Power tools must be used since all interior walls are reinforced.
Forcing the wall will require firefighters to work in a team of two.
Answers
Power tools must be used since all interior walls are reinforced is a consideration when forcing interior walls.
The correct option is C.
What does a load-bearing?The load of the floor or roof construction above them is supported by load-bearing walls, also referred to as "bearing walls." They are made to transfer weight from the roof to the foundation by passing through the flooring. A bearing wall, also known as a load-bearing barrier or a structural wall, supports the entire weight of the home. This wall assists in distributing the weight of the building from the roof to the base, and its loss could lead to the building collapsing.
How is a load-bearing determined?Tom proposes going up to the attic or basement to check which direction the joists run to see if a wall is load-bearing. The wall is still most likely not load-bearing if it runs parallel to the joists.
To know more about Load-bearing visit:
https://brainly.com/question/11158855
#SPJ13
The complete question is -
What is a consideration when forcing interior walls?
A-The wall coverings often hide interior metal framing.
B-The walls may be load-bearing and affect structural integrity.
C-Power tools must be used since all interior walls are reinforced.
D-Forcing the wall will require firefighters to work in a team of two.
As Courtney switches on the TV set to watch her favorite cartoon, the electron beam in the TV tube is steered across the screen by the field between two charged plates. If the electron experiences a force of 3.0 * 10^6 N, how large is the field between the deflection plates?
Answers
Answer:
Explanation:
Force= (q1q2)/(4/\Ęr2)
3×10^6= (1.602×10^-19)^2/(r^2)
r^2=(2.27×10^-33)/(3×10^6)
r^2=8.55×10^-45
r= 9.25×10^-23
What is the variance and standard deviation for: 13, 15, 12, 10, 4, 16, 17, 22, 9
Answers
The diagram shows a circuit with a 3-cell battery, a light bulb, and four labeled locations. Which statement describes the direction of conventional current in this circuit?
Answers
The statement that correctly describes the direction of conventional current in the circuit is : ( C ) current is directed from A to B to C to D
Conventional currentconventioanl current is simply the flow of protons from the positive terminal of the voltage source ( battery ) to the negative terminal of the battery. Also conventional current is the charge transferred in a given direction per unit time. for a conventional current the charge carrier is irrelevant.
Hence we can conclude that the direction of conventional current in the circuit is : current is directed from A to B to C to D.
Learn more about conventional current : https://brainly.com/question/15078212
Attached below is the missing part of the question
What is Minimum Threshold Frequency?
Answers
the minimum frequency of radiation that will produce a photoelectric effect.
Answer:
The threshold frequency is defined as the minimum frequency of incident radiation below which the photoelectric emission is not possible completely.
Which of these pairs of quantities is used to describe the transfer of energy to or from a substance? A. heat and work B. heat and kinetic energy C. work and potential energy D. potential energy and kinetic energy
Answers
Answer:
B. heat and kinetic energy
Explanation:
Heat is a form of energy that flows with respect to temperature difference. Thus, heat energy would flow from an object with higher temperature to that at lower temperature. It generally cascades from a high temperature body to lower temperature body through a medium or when in contact.
Kinetic energy is the energy that is inherent in a moving object. Thus, it can be converted to other forms or transferred between objects. Example, a moving object can transfer part of its kinetic energy to an object at rest on collision. This may cause the motion of the initial stationary object.
Therefore, heat and kinetic energy can be used to describe transfer of energy to or from a substance.
a toy cork gun contains a spring whose spring constant is 18n/m. the spring is compressed 7.47 cm and then used to propel a 9 cork. the cork, leaves the spring from the spring's relaxed length. with what speed, in m/s, does the cork leave the spring?
Answers
The cork leaves the spring at a speed of 3.02 m/s.
We can use the conservation of energy to determine the speed at which the cork leaves the spring.
The initial potential energy stored in the spring is converted to the kinetic energy of the cork as it leaves the spring. Neglecting air resistance, the conservation of energy equation is:
(1/2) k x^2 = (1/2) m v^2
where k is the spring constant, x is the distance the spring is compressed, m is the mass of the cork, and v is the speed of the cork as it leaves the spring.
Substituting the given values:
(1/2) * 18 N/m * (7.47 cm / 100 cm/m)^2 = (1/2) * 0.009 kg * v^2
Solving for v:
v^2 = (18 N/m * (7.47 cm / 100 cm/m)^2) / 0.009 kg
v^2 = 9.119 m^2/s^2
Taking the square root of both sides:
v = 3.02 m/s
to know more about conservation of energy refer here:
https://brainly.com/question/2137260#
#SPJ11
Resolve the weight of the box to find the component of the weight acting parallel to the slope.
W = 50N
30
Answers
Answer:
here's your answer below
Explanation:
sorry something went wrong
.
Student A states that when she sits down on a chair, she is exerting a force on the chair and that is all that happens. Student B states that when she sits on a chair, the chair is actually exerting a force back on her in reaction to her force exerted upon the chair. Which student is correct and why?
A.
Student A is correct because Newton’s 1st Law of Motion states that if the chair exerted a force on the student, her motion would change.
B.
Student A is correct because Newton’s 3rd Law of Motion states that for every action there is an equal and opposite action and the chair does not show any action.
C.
Student B is correct because Newton’s 1st Law of Motion states that if the chair were to be exerting a force on the student, her motion would change.
D.
Student B is correct because Newton’s 3rd Law of Motion states that for every action there is an equal and opposite action and the chair’s action counteracts the student’s so that neither move.
Answers
Answer:
C
Explanation:
I got it right on the test !!
The student that is correct is C. Student B is correct because Newton’s 1st Law of Motion states that if the chair were to be exerting a force on the student, her motion would change.
According to Newton's third law of motion, there's an equal and opposite reaction force for every action force. It should be noted that when an individual sits on a chair, the chair is actually exerting a force back on her in reaction to the force exerted upon the chair.
Student A is incorrect because when she sits down on a chair, the force that she's exerting on the chair is not the only thing that happens because the chair exerts a force back. Therefore, as the chair were to be exerting a force on the student, her motion would change.
Read related link on:
https://brainly.com/question/24880956
i set up a magnet to pass through a single loop of wire. the loop of wire is perpendicular to the page so you only see the edge of it below. it may be helpful to know that the magnetic field from a magnet points out away from the north end and points in towards the south end. a. as the magnet approaches the loop from the left would a magnetic force get larger or smaller? (think about what happens when two magnets get closer. is the force larger or smaller.) b. as the magnet approaches the loop from the left, what happens to the magnetic flux? c. what will be the direction of induced current in the loop? (indicate the direction as down through the front of the loop or up through the front of the loop.)
Answers
a. The magnetic force will increase when the magnet approaches the loop from the left side because the magnetic field of the magnet interacts with the loop's magnetic field. When two magnets get closer, the force between them gets stronger.b. As the magnet approaches the loop from the left,
The magnetic flux will increase because the magnetic field lines passing through the loop increase. c. When a magnet passes through a loop of wire, an electric current is induced. According to Lenz's law, the induced current will create a magnetic field that opposes the motion of the magnet. When the magnet approaches the loop from the left, the induced current will create a magnetic field pointing in the opposite direction of the magnet's field. Therefore, the direction of induced current in the loop will be in the counterclockwise direction, which means it will flow up through the front of the loop. The main answer is as follows:a. The magnetic force will increase when the magnet approaches the loop from the left side because the magnetic field of the magnet interacts with the loop's magnetic field. When two magnets get closer, the force between them gets stronger.b.
As the magnet approaches the loop from the left, the magnetic flux will increase because the magnetic field lines passing through the loop increase.c. When a magnet passes through a loop of wire, an electric current is induced. According to Lenz's law, the induced current will create a magnetic field that opposes the motion of the magnet. When the magnet approaches the loop from the left, the induced current will create a magnetic field pointing in the opposite direction of the magnet's field. Therefore, the direction of induced current in the loop will be in the counterclockwise direction, which means it will flow up through the front of the loop.
To know more about magnetic field visit:
https://brainly.com/question/19542022
#SPJ11
A 750 g disk and a 760 g ring, both 15 cm in diameter, are rolling along a horizontal surface at 1.7 m/s when they encounter a 13° slope. Part A How far up the slope does the disk travel before rolling back down? Express your answer with the appropriate units
Part B How far up the slope does the ring travel before rolling back down? Express your answer with the appropriate units. ?
Answers
Distance traveled up the slope by the disk: 0.190 meters. Distance traveled up the slope by the ring: 0.196 meters.
What is the distance up the slope traveled by a 750 g disk and a 760 g ring, both 15 cm in diameter, rolling at 1.7 m/s on a 13° slope?To solve this problem, we can use the principles of conservation of energy and rotational kinetic energy.
Given:
Mass of the disk (m_disk) = 750 g = 0.75 kg
Mass of the ring (m_ring) = 760 g = 0.76 kg
Diameter of both disk and ring (d) = 15 cm = 0.15 m
Initial velocity (v) = 1.7 m/s
Angle of the slope (θ) = 13°
Part A:
For the disk:
The moment of inertia of a disk about its center is given by I_disk = (1/2) * m_disk * (r_disk)^2,
where r_disk is the radius of the disk. Since the diameter is given, we can calculate the radius as r_disk = d/2.
For the disk, the total kinetic energy (KE_disk) is the sum of translational and rotational kinetic energy:
KE_disk = (1/2) * m_disk * v^2 + (1/2) * I_disk * ω^2,
where ω is the angular velocity.
For rolling without slipping, the linear velocity is related to the angular velocity by v = ω * r_disk.
At the highest point of the slope, the disk will momentarily stop before rolling back down. At this point, the kinetic energy is converted into potential energy.
Setting KE_disk = 0.75 * 9.8 * h_disk, where h_disk is the height the disk travels up the slope, we can solve for h_disk.
Part B:
For the ring:
The moment of inertia of a thin ring about its center is given by I_ring = m_ring * (r_ring)^2,
where r_ring is the radius of the ring.
Using similar calculations as in Part A, the total kinetic energy (KE_ring) is given by:
KE_ring = (1/2) * m_ring * v^2 + (1/2) * I_ring * ω^2.
At the highest point of the slope, the ring will momentarily stop before rolling back down. Again, the kinetic energy is converted into potential energy.
Setting KE_ring = 0.76 * 9.8 * h_ring, where h_ring is the height the ring travels up the slope, we can solve for h_ring.
Let's calculate the values for both parts:
Part A:
r_disk = 0.15/2 = 0.075 m
I_disk = (1/2) * 0.75 * (0.075)^2 ≈ 0.00202 kg·m^2
KE_disk = (1/2) * 0.75 * 1.7^2 + (1/2) * 0.00202 * ω^2
Setting KE_disk = 0.75 * 9.8 * h_disk, we can solve for h_disk.
Part B:
r_ring = 0.15/2 = 0.075 m
I_ring = 0.76 * (0.075)^2 ≈ 0.00317 kg·m^2
KE_ring = (1/2) * 0.76 * 1.7^2 + (1/2) * 0.00317 * ω^2
Setting KE_ring = 0.76 * 9.8 * h_ring, we can solve for h_ring.
By solving the equations and plugging in the values, we can find the respective heights traveled by the disk and the ring up the slope.
Learn more about Distance
brainly.com/question/15172156
#SPJ11
Please someone answer this quickly!! I'll give 20 points for it, I just need the answers :)
Answers
The potential energy of the person mass 95 Kg sitting on top of a slid 3 m high is 2795.85 J
How do i determine the potential energy of the person?The following data were obtained from the question:
Mass of person (m) = 95 KgHeight of slid (h) = 3 mAcceleration due to gravity (g) = 9.81 m/s² Potential energy of person (PE) = ?The potential energy of the person can be obtained as follow:
PE = mgh
Inputting the given parameters, we have:
= 95 × 9.81 × 3
= 2795.85 J
Thus, the potential energy of the person is 2795.85 J
Learn more about potential energy:
https://brainly.com/question/22274239
#SPJ1
Has science done more harm than good ?
Answers
Absolutely ! Science, and those who participate in its satanic rites and mysterious rituals, have ruined the Earth's climate, and brought disease and nuclear war upon its people.
Without science, and its cousin, mathematics, there would be no Carbon Dioxide or other greenhouse gases, no viruses, and no H-bombs. Nobody would ever be hit by a car, electrocuted by a live wire, or killed in a fall from a roller coaster.
No child would ever stress out over a big Physics or Algebra exam.
We could all live a carefree, idyllic life, cooling our tootsies in a little stream, running around in the grass, eating plums and berries, playing with a stick.
Science has made us all neurotic, scared, self-conscious, and fat. It has put everybody in danger.
What is the speed of a jet plane that flies 7200 km in 9 hours (in km/hr)?
Answers
a car moving east with a velocity of 25mph.What is the acceleration?
Answers
Answer:
0
Explanation:
Moving east at constant velocity then a=0
5. Find the velocity of a train that traveled 75 km in 35 minutes. (answer
in m/s). Conversion factors: 1000 m = 1 km; 60 s = 1 min.
Answers
75km=75000m
35min=2100 seconds
Velocity=Displacement/Time
=75000/2100
=750/21
=35.71 m/s
Someone please help me into what was the average speed for the entire trip thank you
Answers
From the position-time graph, we have the following:
Distance covered Time
0 to 28 m 0 to 20 seconds
28m to 52 m 20 to 60 seconds
At 52 m 60 to 80 seconds
52 to -20m 80 to 110 seconds
Let's find the average speed for the entire trip.
To find the average speed, apply the formula:
\(avg\text{ spe}ed=\frac{total\text{ distance}}{total\text{ time}}\)Distance at line 1: 28 - 0 = 28m
Distance at line 2: 52 - 28 = 24 m
Distance at line 3: 0 m
Distance at line 4: -20m - 52 = -72 m
Thus, we have the equation:
\(s=\frac{d_1}{t_1}+\frac{d_2}{t_2}+\frac{d_3}{t_3}+\frac{d_4}{t_4}\)Where:
d1 = 28 m
d2 = 24 m
d3 = 0 m
d4 = 72 m
t = 110 s
Now substitue values into the equation:
\(\begin{gathered} s=\frac{28}{20}+\frac{24}{40}+\frac{0}{20}+\frac{72}{30} \\ \\ s=4.4\text{ m/s} \end{gathered}\)Therefore, the average speed for the trip is 4.4 m/s.
ANSWER:
Equation:
\(s=\frac{d_1}{t_1}+\frac{d_2}{t_2}+\frac{d_3}{t_3}+\frac{d_4}{t_4}\)Substitution:
\(s=\frac{28}{20}+\frac{24}{40}+\frac{0}{20}+\frac{72}{30}\)Calculation:
\(\begin{gathered} s=1.4\text{ + }0.6\text{ + 0 + }2.4 \\ \\ s=4.4\text{ m/s} \end{gathered}\)A baseball sits motionless near first base on a baseball diamond. What statement best explains why the baseball remains motionless?
A. The forces acting on the baseball are all balanced.
B. There are no forces acting on the baseball.
C. The dirt is placing an unbalanced force on the baseball.
D. The force on the baseball is unbalanced due to gravity.
Answers
Answer:
B
Explanation:
There are no forces acting in the baseball
A sound wave passes through regions of the ocean with varying density. How do the varying wavelengths correspond to the density of the water
Answers
Sound moves faster in the denser regions of the ocean than in the less dense regions of the ocean.
Speed of soundWe know that sound is a wave whose medium of propagation isthrough matter. Hence, sound move faster in a dense object than in a less dense object.
As such, sound moves faster in the denser regions of the ocean than in the less dense regions of the ocean.
Learn more about density: https://brainly.com/question/12980705
The inheritance of genetic traits from parents to children follows predictable rules. Knowing that each parent contributes genes equally to each child, what determines an inherited trait such as eye color? a.Only the interaction between dominant genes. Only the interaction between dominant genes. b.Only the interaction between recessive genes. Only the interaction between recessive genes. c.The interaction between dominant and recessive genes. d.The interaction between dominant and recessive genes. The interaction between dominant and recessive genes does not determine inherited traits. The interaction between dominant and recessive genes does not determine inherited traits.
Answers
Answer:
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
Explanation:
he Big Bang Theory suggests....
a
The universe began in an instant.
b
The universe was born from clouds of dust and gas.
c
The single point containing the universe exploded and the universe stretched and expanded.
d
Gravity began to form stars and galaxies from clouds of dust and gas.
e
Both A and C.
f
Both B and C.
g
None of the above.
Answers
Answer:
C
Explanation:
To know more head to.
https://phys.org/news/2015-12-big-theory.html
Answer:
i think a and c
Explanation:
) if the nearest object is 10 cm from the observer, approximately how far away is the farthest object in cm?
Answers
This same statement expresses the fact that to the furthest item is 80 cm distant.
An object declaration class is what?The combination of objects known as an object class may be characterised in by the traits that all of its members share. So all e-mail systems get some characteristics, generic e-mail, for instance, may be an object class.
The left item has travelled about 1/4 of the distance contrasted to the centre object, which means that if the centre object were to be pushed half as far as the right object, it would be pretty far away (20 cm). Consequently, add 4 to the centre object's distance.
It is 80 cm distant from the furthest item.
To know more about Object visit:
https://brainly.com/question/24445340
#SPJ4
The complete question is-
If the nearest object is 10 cm from the observer, approximately how far away is the farthest object?
________cm
describe two methods by a magnet can be demagnetized
Answers
Answer:
Demagnetizing a magnet :
By hitting with a hammerBy heating with a high temperatureBy dropping the magnetBeing dropped
intermediate level a 30 micro f capacitor is connected to a 9 v battery calculate the charge on the capicot
Answers
When a 30 micro of capacitor is attached to the a 9 v battery at its intermediate level, the equation states that 2.7μC is the charges on the capacitor.
What is the basic principle of a capacitor?A capacitor operates on the basis that capacitance of the a conductor exhibits rise when a grounding conductor is introduced near it. As a result, the capacitance has parallel plates that are spaced apart from one another and facing in opposing directions.
What is a capacitor used for?Two conductors that are separated from one another and positioned close to one another make up a capacitor, a electrical energy storage device. A parallel-plate capacitor is a simple example with one such storage device.
Briefing:If we rearrange the previous formula to account for C=30F and V=9v in our issue, we can calculate the charge held in the capacitor:
Q=CV
=(30μF) (9v)
=2.7μC
To know more about capacitor visit:
brainly.com/question/17176550
#SPJ4
Give one example which describes Newton's first law of motion.
Answers
Answer:
a moving car
Explanation:
a body remains in its constant state unless un extenal force is applied.
NEED HELP PLEASE ASAP
The energy output of a fan is 36 kWh. The fan is 75% efficient.
How much energy is lost to the surroundings?
12 kWh
36 kWh
48 kWh
84 kWh
Answers
The input energy = 36kWh divide by 0.75 = 48kWh
The lost energy = 0.25 x 48kWh = 12kWh
because 25% of input energy is lost to the surrounding.
Answer:
The energy output of a blender is 1.4 kWh. If the blender is 85% efficient, how much energy is lost to the surroundings?
⇒ 0.25 kWh
a technician connects the red lead of a voltmeter to the b+ [output] terminal of an ac generator and the black lead to the battery positive terminal. he starts the engine and turns on all the lights and electrical accessories. what is the technician measuring?
Answers
Answer:
He is testing for voltage drop (voltage drop test)
Explanation:
Connecting the red lead of a voltmeter to the B+ output to an ac generator and black lead to a battery +ve terminal measures the voltage drop in the circuit when the engine is turned ON and all electrical accessories too.
with this he knows if the alternator is charging the battery.