Answer:
A. NaF and MgS
Explanation:
The reaction equation is given as:
Na₂S + MgF₂ → 2NaF + MgS
The product of this reaction is NaF and MgS.
In a double displacement reaction there is an actual exchange of partners to form new compounds. This reaction takes place between ionic compounds.
The driving force for the reaction is:
formation of an insoluble precipitateformation of water or any other non-ionizing compound liberation of a gaseous product.A planet's rotation determines the length of its day and its revolution determines the length of its year. A day on Earth is 24 hours and a year on Earth is 365 days. In contrast to Earth, a day on Venus is longer than a year on Venus. Which is the best reason for why this is so?
Explanation:
The speed of rotation of Venus is slower than that of Earth that is why a day on Venus is longerthan Earth's day. Whereas, Venus is closer to sun than Earth, this means Venus trajectory of revolution is smaller than that of Earth.Therefore, a year on Venus is shorter than Earth's year.
velocity is vector quantity but speed is scalor quantity . why ?
speed speed scalar quantity is the rate of at which an object covers distance on the other hand velocity is a vector quantity it is direction aware.velocity is the rate at which the position changes.the average velocity is the displacement or position change Per time ratio.so velocity is a vector quantity but speed is a scalar quantity
What’s the meaning of Density
Answer:
d= m/v
density is mass per unit volume.
Density describes how tightly packed particles are so if something is more dense the particles are going to be packed closely together and if something is less dense they will be looser and not as tightly packed.
HELP!!
8. The speed that the car is going at an instant of time is called the (5 points)
average speed
final speed
initial speed
instantaneous speed
Answer:
the speed that the car is going at an instant of time is called the instantaneous speed.
I NEED HELP ASAP IM ON TIMER !!!!!!!!
Average speed and average velocity are always the same.
Please select the best answer from the choices provided
T
F
Average speed and average velocity are always the same.
Please select the best answer from the choices provided
T
F
Answer:
F
Explanation:
The average velocity is the ratio of total displacement and time.The average speed is the ratio of total distance and time.Therefore the average speed and average velocity are equal if the total displacement is equal to the total distance that is if the body travels along a straight line without changing the direction.
Which two types of potential energies would be types of mechanical energies? electrical and kinetic nuclear and chemical radiant and thermal elastic and gravitational
The two types of potential energies that would be types of mechanical energies are:
thermal elastic energy and gravitational energy.What is potential energy?The term potential energy is the energy possessed by a body by virtue of its position. It is different from kinetic energy which is due to the state of motion of a body.
The two types of potential energies that would be types of mechanical energies are;
thermal elastic and gravitational energy.Learn more about mechanical energy: https://brainly.com/question/1932868
Answer: D - elastic and gravitational
Explanation: Edge 2023
why is it possible for iron ships to float o water,but needles sink when dropped in water
Explanation:
Needles sinks in water due to the more density of needles than the density of water. But ship is made hollow and contains air. So it's average density Is less than that of water. It displaces the liquid of it's own weight causing the ship to float on water.
So, it it possible for iron ships to float on water,but needles sink when dropped in water.
Hope it will help :)❤
A satellite moves at a constant speed in a circular orbit about the Earth. Which pair of statements about momentum and kinetic energy are correct.
Answer:
The momentum and the kinetic energy remains constant.
Explanation:
A uniform circular motion is defined as the motion of a body which moves in a constant speed or at the same speed during the motion.
In the context, it is given that a satellite is moving around the earth in a circular orbit at a constant speed. The satellite has certain momentum as well as energy.
We can conclude that the kinetic energy and the momentum of the satellite remains constant as the momentum and kinetic energy depends on the speed of an object And here the speed of the satellite is constant, so the moment as well as the kinetic energy of the satellite remains constant while moving in a circular path.
A circuit contains two 1.5 volt battery and a bulb with a resistance of 3 ohms. Calculate the current
Answer:
The current is 1 A
Explanation:
Current in a Series Connection
When two or more elements are connected in series, all of them have the same current, and the sum of their individual voltages is the total voltage applied to the circuit.
According to Ohm's law:
V=R.I
Where V is the voltage, R is the resistance and I is the current of a circuit.
We have a voltage of V=1.5 V + 1.5 V = 3 V and a resistance of R=3 ohms.
We can calculate the current by solving for I:
[tex]\displaystyle I=\frac{V}{R}=\frac{3}{3}=1\ A[/tex]
The current is 1 A
715 J of heat are transferred from
a 1.30 kg aluminum block to a
0.800 kg iron block. Find the
temperature change for the
aluminum
Aluminum
Iron or steel
c = 900 J/(kg*c)
c = 452 J/(kg"C)
(Unit = degrees C)
Answer:0.61
Explanation:
the answer is 0.61 because i just typed it into acellus abs it was right
According to Newton's 3rd law: There is
always an ___ __ and _______ force
acting on any object that interacts with
another object
Equal and Opposite
Vertical and Horizontal
Faster and Slower
Greater and Lesser
Johanna is studying what happens to the energy as a ball rolls down a ramp. What is one form of energy that she is studying? gravitational potential energy electrical energy chemical energy elastic potential energy
Answer: gravitational potential energy
Explanation:
Gravitational potential energy is refered to as the potential energy that an object has due to its gravitational field, which in turn is being turned into a kinetic energy when there is a fall of such objects.
Since Johanna is studying what happens to the energy as a ball rolls down a ramp, the form of energy here is the gravitational potential energy.
Answer:
the answer is A
Explanation:
gravitational potential energy
If you want to make a flashlight and have two batteries and a light bulb how would you hook them up to make it bright and why?
Answer:
The positive end of battery 1 touching the negative end of battery 2 and wires connecting the negative of battery 1 to the light light bulb and the positive of battery 2 to the light bulb.
Explanation:
What do scientists hope to find? Why would that sort of thing be found inside Earth?
Answer:
Scientists will hope to find a lot of things. Such as lava, fossils, and landmarks.
Explanation:
i farted
Twins Jody and Taylor are rearranging the furniture in their bedroom and want to move a dresser across the room. The dresser has a sliding force of 90N. Jody can push with a force of 55N and Taylor can push with a force of 38N. What is the Net Force? Can the twins move the dresser across the room? Explain why in complete sentences and show all math work to support your answer.
Plz help this is due in 5 days ;-;
Answer:
yes, They will be able to move the dresser.
Explanation:
sliding force 90N
55N + 38N = 93N
therefore, yes the twins can move the dresser
What is championship game of baseball called? The World Series The Super Bowl The World Cup
Answer:
The World Series
Explanation:
The Super Bowl is the championship American Football game, and the World Cup is the Soccer/Football game.
American Football and Football are different things. The first is what Americans call football, while the other is what Americans call soccer. It is confusing.
Why should a person warm up before physical activity?
Answer:
don't wanna pull anything
Explanation:
A good warm-up before a workout dilates your blood vessels, ensuring that your muscles are well supplied with oxygen. It also raises your muscles' temperature for optimal flexibility and efficiency. By slowly raising your heart rate, the warm-up also helps minimize stress on your heart.
Answer:
Here you go!
Explanation:
A good warm-up before a workout dilates your blood vessels, ensuring that your muscles are well supplied with oxygen. It also raises your muscles' temperature for optimal flexibility and efficiency. By slowly raising your heart rate, the warm-up also helps minimize stress on your heart. “Stretching allows for greater range of motion and eases the stress on the joints and tendons, which could potentially prevent injury. Warming up, such as low-heart rate cardio, prepares the circulatory and respiratory system for the upcoming ‘age- and type-appropriate target heart rate’ exercising, whether it’s endurance or sprint type of activities.” The cool-down is just as critical. It keeps the blood flowing throughout the body. Stopping suddenly can cause light-headedness because your heart rate and blood pressure drop rapidly. Before you exercise, think about warming up your muscles like you would warm up your car. It increases the temperature and flexibility of your muscles, and helps you be more efficient and safer during your workout. A warm-up before moderate- or vigorous-intensity aerobic activity allows a gradual increase in heart rate and breathing at the start of the activity.
Tips:
*Warm up for 5 to 10 minutes. The more intense the activity, the longer the warm-up.
*Do whatever activity you plan on doing (running, walking, cycling, etc.) at a slower pace (jog, walk slowly).
*Use your entire body. For many people, walking on a treadmill and doing some modified bent-knee push-ups will suffice.
High- and low-pressure areas leading to air movement happen when there are differences in which factor?
clouds
density
atmosphere
precipitation
whoever gets the answer will get brainliest!! :D
Answer:
The answer is density
Explanation:
They density of the air is what makes a difference.
The bouncing back of a ray of light , sound , or heat when the ray hits a surface that it does not penetrate
A . Refraction
B . Reflection
C. Resonance
D. Standing Wave
Answer:
B. reflection
Explanation:
Have a good day! :)
The bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not penetrate is called a reflection, so option B is correct.
What is Reflection?Reflection is the abrupt change in a wave's propagation direction when it encounters a boundary between two media. The approaching wave disturbance is still present in the same medium, at least in part. At plane borders, reflection happens regularly and follows a straightforward law.
Angles of incidence (between the oncoming wave's direction of motion and a perpendicular to the reflecting surface) are identical to angles between the reflected wave's direction of motion and a perpendicular (angle of reflection). Diffuse reflection occurs at uneven or irregular boundaries. The percentage of the wave's energy that is reflected by a surface material is known as its reflectivity.
Therefore, the bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not penetrate is called a reflection.
To know more about Reflection:
https://brainly.com/question/2254222
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When does a car show positive acceleration?
Answer:
When it is accelerating or gaining velocity.
Explanation:
A car show positive acceleration when it is accelerating or gaining velocity. It would show negative acceleration if it was de-accelerating, slowing down or coming to a stop.
Answer:
When the velocity is increasing in the positive direction
Explanation:
Identify two factors that increase the electric force between objects
Answer: The distance between particles, and the amount of electric charge they carry.
Explanation:
Charles Coulomb wanted to figure out the strength of the force between two objects and these were the two most independent factors.
i need help with this question, i’ll mark as Brainliest!!
Answer:
The given Device is a :
SOLENOID.Since at the left corner, The MFL (Magnetic field lines) are entering the solenoid OR terminating at this end, This end turns out to be the SOUTH POLE.
According to the arrows, The current is always in the direction of the magnetic field. So, The current is leaving the Solenoid at the top right corner.
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807Answer:
The name of the device is Solenoid. Left end represents South Pole. The current ( I ) is leaving the wire coil at the top right corner.
Explanation:
Hope you understand....
3. Electrons are the only part of an atom that can be transferred between materials. True or
False?
Answer:
True
Explanation:
Electrons can be transferred between materials as in chemical reactions solid substances lose electrons while other elements gain electrons to balance the electrons in reaction.It occurs by conduction,polarization and friction.
a boy pulls his toy on a smooth horizontal surface with a rope inclined at 60° to the horizontal if the effective Force pulling the toy along the horizontal surface is 5-newton calculate the tension in the rope
Answer:
The tension in the rope is 10 N
Explanation:
The Force Vector
Like all vectors, the force has a magnitude and direction. Vectors can be decomposed into two perpendicular components on both axes.
The tension in the rope (F) can be calculated by using vector decomposition as follows.
The figure included below shows a force F which horizontal component is known to have a value of Fx= 5 Nw. The angle formed by the force and its horizontal component is 60°.
We can use the trigonometric ratio called the cosine to find the magnitude of F as follows:
[tex]\displaystyle \cos 60^\circ = \frac{5}{F}[/tex]
Solving for F:
[tex]\displaystyle F = \frac{5}{\cos 60^\circ}[/tex]
[tex]\displaystyle F = \frac{5}{\frac{1}{2}}[/tex]
Thus, F = 10 N
The tension in the rope is 10 N
A 55.0 kg person, having a density of
1010 kg/m3, is underwater. What is the
buoyant force acting on the person?
[?]N
Pwater = 1,000 kg/m3
Answer:
534.7
Explanation:
55/1010 = 0.0545m^3
1000(0.0545)(9.81) = 534.7 N (kept at 4 sig figs)
Help please this is worth 30% of my grade in total
Answer:
D. Both are held together by gravitational forces
Explanation:
The common features in galaxies are;
Gravity holds the stars togetherThe dense region in a galaxy is the centerThey all have a faint outer region and mysterious dark matter haloThey all have stars, planets, asteroids, galactic cloudDave runs a 400 m race with a speed of 4 m/s. What time will it take him to finish the
race?
Answer:
The answer should be 100 if not try 200
Explanation:
d=v x t
400m=4m/s x t
/4 /4
100=t