Decreasing the amount of current flowing through the circuit by using a 5 volt battery instead of a 10 volt battery.
-- reduce the voltage of the battery or power supply
-- increase the resistance in the circuit
a car engine changes chemical potential energy into the blank energy of the moving car
Kinetic energy
A car engine changes chemical potential energy into the kinetic energy of the moving car.
Explanation;A car engine converts potential chemical energy stored in gasoline into thermal energy and then into kinetic mechanical energy.When gasoline undergoes combustion it reacts with oxygen to produce carbon dioxide and water vapor.Gasoline is a mixture of octane and similar hydrocarbons and contains potential chemical energy.The hot exhaust gases from the combustion of gasoline that are produced within the cylinder expand and exert pressure, moving the piston in the cylinder outward then inward as the gas is exhausted. Kinetic mechanical energy of the moving pistons is transferred to the drive shaft and eventually to the wheels, giving the car kinetic mechanical energy.What is the force, in units of femtoNewtons, on an electron moving at a velocity of 7.26 x 106 ms-1 perpendicularly to a magnetic field when the magnetic flux density of 0.049 T?
Answer:
56.9 fN
Explanation:
The force exerted on the electron is:
[tex]F=Bqv[/tex]
where
B is the magnetic field strength
q is the electron's charged
v is the speed of the electron
In our problem,
B = 0.049 T
[tex]q=1.6\cdot 10^{-19} C[/tex]
[tex]v=7.26\cdot 10^6 m/s[/tex]
Therefore, the force is
[tex]F=(0.049 T)(1.6\cdot 10^{-19} C)(7.26\cdot 10^6 m/s)=5.69\cdot 10^{-14} N=56.9 fN[/tex]
How is the movement of molecules that you observed in both the cases connected to their mass and temperature?
Answer:
As the temperature increases, the kinetic energy of the molecules of the liquid increases.
Explanation:
As the temperature increases, the kinetic energy of the molecules of the liquid increases.
Uranium-238 undergoes alpha decay. Therefore, uranium-238 will
A. Remain stable
B. Stay the same element
C. Release charged particles and no energy
D. None of the above
Uranium-238 undergoes alpha decay. Therefore, uranium-238 will
A. Remain stable
B. Stay the same element
C. Release charged particles and no energy
D. None of the above
The actual answer is that it will change into a different element altogether.
Answer:
D.None of the above.
Explanation:
We are given that uranium-238 undergoes alpha decay.
Therefore, uranium-238 change into into new element of atomic number 2 less and mass number 4 less and releasing an alpha particle because it undergoes alpha decay
U-238[tex]\rightarrow [/tex]an atome with atomic number 2 less and mass number 4 less+ helium particle with atomic number 2 and mass number 4
Alpha decay: When an element undergoes an alpha decay then it transform into an atom with atomic number 2 less and mass number 4 less due to emission of alpha particle (alpha particle means helium particle which have atomic number 2 and mass number 4)
Therefore, option A is false.
B. It is also false.Because a new atom is formed and there is no releasing of charged particle
C.There is no any releasing of charged particle and no energy.Hence, it is false.
Answer :D. None ob the above.
Which parts of the spectrum show the presence of elements in the stars atmosphere
Answer:
the one right behind 600 and the one in between 600 and 700
Explanation:
Final answer:
Scientists determine the presence of elements in the stars' atmospheres by analyzing their atomic spectra, which are obtained by spreading out the light emitted by stars into a spectrum using a spectrograph. The spectrum shows dark lines or absorption lines that indicate the presence of specific chemical elements.
Explanation:
Scientists determine what elements are present in distant stars by analyzing the light that comes from stars and finding the atomic spectrum of elements in that light. By using a spectrograph to spread out the light into a spectrum, scientists can observe the presence of elements in the stars' atmospheres. The spectrum shows dark lines or absorption lines that are produced by atoms in the atmospheres of stars and absorb light at certain wavelengths, providing evidence of the presence of specific chemical elements.
Which is true about the pressure of a fluid at a specific depth?
It varies with the total volume of the fluid.
It depends only on the type of fluid.
It is exerted only in the downward direction.
It depends on the surface area of the fluid.
It varies with the total volume of the fluid.
Explanation;Pressure and depth have a directly proportional relationship, due to the greater column of fluid that pushes down on an object submersed.The relationship between pressure and depth may be looked at with respect to the relationship between pressure and volume, as the column of fluid has a specific volume and corresponding to depth.Which letter indicates the amplitude of the wave?
a. A
b. B
c. C
d. D
is it b?
the correct answer A
Hello, the answer is d. A
Best regards
The ionosphere lies between the mesosphere and exosphere is it true or false
False because the Ionsophere lies between the Mesosphere and the Theromsphere. If can can you give me brainliest :o ?
Which of the following is the best example of kinetic energy?
A book sitting on a bookshelf
A golfer preparing to putt the ball
A race car in position at the start line
A satellite orbiting the Earth
Answer:
A satellite orbiting the Earth
Explanation:
Kinetic energy is the intrinsic energy possessed by an object in motion. The bigger the object in motion, and the higher its speed , the higher the kinetic energy. The equation below is used to calculate this energy also referred to as the work put into the object to accelerate it into its current velocity.
E(k) = 1/2 * m * v²
The best example of kinetic energy in the options provided is 'A satellite orbiting the Earth'. Kinetic energy specifically refers to the energy possessed by an object in motion, such as a satellite that is constantly moving in its orbit around the Earth.
Explanation:The best example of kinetic energy among the given options is: 'A satellite orbiting the Earth'. Kinetic energy is the energy of motion. Therefore, any object in motion possesses kinetic energy. The satellite orbiting the Earth is in constant motion; thus, it has kinetic energy. The other examples like a book sitting on a bookshelf, a golfer preparing to putt the ball, and a race car in position at the start line are instances of potential energy or energy that is stored and has the capability to do work but isn't actively doing so.
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which pair of objects will have the least gravitational attraction to each other
A: 2 concrete blocks 6 cm apart
B: 2 marbles 12 cm away
C: A concrete block and a marble 6 cm apart
D: A concrete block and a marble 12 cm apart
Hey i am here to help you.
A: 2 concrete blocks 6cm apart will have the least gravitational attraction to each other.
I believe that this answer was helpful.
Two shirts are removed from a dryer and attract each other with a force of 0.5N while they are separated by 1 cm. If the two shirts are equally charged, what would their charge and the force be if they are separated by 4 cm?
1) Charge: [tex]7.5\cdot 10^{-8} C[/tex]
Explanation:
The electrostatic force between the two shirts is:
[tex]F=k\frac{q_1 q_2}{r^2}[/tex]
where
k is the Coulomb's constant
q1 = q2 = q is the charge of each shirt (they are equally charged)
r = 4 cm = 0.04 m is the distance between the shirts
F = 0.5 N is the force
Re-arranging the equation, we can find q, the charge of each shirt:
[tex]q=\sqrt{\frac{Fr^2}{k}}=\sqrt{\frac{(0.5 N)(0.01 m)^2}{9\cdot 10^9}}=7.5\cdot 10^{-8} C[/tex]
2) Force if they are separated by 4 cm: 0.03 N
In this case, the force between the two shirts would be:
[tex]F=k\frac{q_1 q_2}{r^2}=(9\cdot 10^9)\frac{(7.5\cdot 10^{-8}C)^2}{(0.04 m)^2}=0.03 N[/tex]
Answer:
C. 7.4E-6C, 0.03 N
Explanation:
What is the processing of information and other input into your memory called?
A. Sensory representation
B. Encoding
C. Storage
D. Conditioning
Answer:
B. Encoding
Explanation:
Memory is the set of processes used to encode, store, and retrieve information over different periods of time.Encoding is the process through which we get information into our brains. It involves the input of information into the memory system. Storage on the other hand is the retention of the encoded information. Retrieval involves getting the information out of memory and back into awareness, is the third function.Encoding is the processing of information and input into memory.
Explanation:The processing of information and other input into your memory is called encoding. Encoding is the input of information into the memory system. It involves labeling or coding sensory information and connecting new concepts to existing concepts. Encoding can occur through automatic processing or effortful processing.
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what does the delta symbol represent in the equation
Delta means change usually
Answer: A) Change in velocity
Explanation:
USA test prep
Please select the word from the list that best fits the definition most destructive kind of mass movement
The most destructive kind of mass movement a landslide.
What is mass movement?why landslide definition most destructive kind of mass movement?Mass movements are downhill events that transport sediment and other debris, and there are four types of mass movement that have varying degrees of destructiveness. They are landslides, flows, slumps, and creep.The four types of mass movement include landslides, slump, creep, and mudflows. Landslides occur when masses of soil and rocks move down a steep slope.The most destructive type of mass movement is a landslide, which occurs when rock and soil slide quickly down a steep slope. Some landslides may contain huge masses of rock, while others may contain only a small amount of rock and soil.Landslide is the most destructive kind of mass movement.
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Choose all the answers that apply. Which of the following forces require physical contact?
A. tension
B. air resistance
C. friction
D. magnetic force
E. applied force
CHOOSE ALL THAT APPLY PLEASE!
The answers are:
A. Tension
B. Air resistance
C. Friction
E. Applied force
Why?Let's discard each given option in order to find what forces requires physical contact:
A. Tension, correct: Tension force appears when it's a force pulling another object, trying to move it in the same direction, the tension usually involves a rope or cable used to pull another object. For example, a mass being held with a rope/cable.
B. Air resistance, correct: Air resistance, or drag, is a force acting in the opposite direction of a body in motion when it's passing through the air, involving contact between the air molecules and the surface of the object. For example, when an airplane is flying, it's being affected by the air resistance, making it move slower.
C. Friction, correct: The friction appears when there is an object surface being in contact with another object surface, both or just one can be in motion, the frictional forces always go in the opposite direction of the motion. For example, when you try to pull a box from a place to another, there is always a force that opposes to the movement, making you to apply more force in order to move the object, it's the frictional force.
D. Magnetic force, incorrect: Magnetic force does not require physical contact between objects. The magnetic force acts on an object, pulling or attracting it. For example, using a magnet to attract a metallic object does not involve any physical contact, the force acts on the metallic object attracting it with no contact.
E. Applied force, correct: The applied forces involve physical contacts, applying forces on an object can result in the object motion. For example, pushing a button, the button us bein affected by an applied force and it will move in the same direction that the force.
Have a nice day!
Answer:
A. Tension
B. Air resistance
C. Friction
E. Applied force
Explanation:
Sayid drew an energy pyramid. What does each section of the triangle represent?
Pyramid of numbers: relative number of individual organisms at each trophic level in an ecosystem. Pyramids of energy show the relative amount of energy available at each trophic level. On average, about 10 percent of the energy available within one trophic level is transferred to the next trophic level.
HOPE THIS HELPED!!! XD
Represents a:
A Trophic Level
What does the signal word then accomplish in these sentences
a basketball player can leap upward .65m how long does the basketball player remain in the air use 9.81m/s²
At the player's maximum height, their velocity is 0. Recall that
[tex]{v_f}^2-{v_i}^2=2a\Delta y[/tex]
which tells us the player's initial velocity [tex]v_i[/tex] is
[tex]0^2-{v_i}^2=-2g(0.65\,\mathrm m)\implies v_i=3.6\dfrac{\rm m}{\rm s}[/tex]
The player's height at time [tex]t[/tex] is given by
[tex]y=v_it-\dfrac g2t^2[/tex]
so we find their airtime to be
[tex]0.65\,\mathrm m=\left(3.6\dfrac{\rm m}{\rm s}\right)t-\dfrac g2t^2\implies t=0.36\,\mathrm s[/tex]
1kg of gold will have seven times the volume of 1kg of aluminium? True/False
false 99.8% sure i looked it up so i believe thats it
The statement is false. For a fixed mass, gold, which is denser than aluminium, will have a smaller volume.
Explanation:The statement that 1kg of gold will have seven times the volume of 1kg of aluminium is false. The volume of a material is derived from its mass and its density. Specifically, volume equals mass divided by density. The density of gold is about 19.3 g/cm³ while the density of aluminium is about 2.7 g/cm³. Hence, for a given mass, gold will have a smaller volume than aluminium. The intuitive reason for this is that gold is denser than aluminium - it has more mass packed into the same volume.
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The distance between a proton and an electron is cut in half. How does the force of attraction change? A) The force becomes twice as much. B) The force becomes one-half as much. C) The force becomes four times as much. D) The force becomes one-quarter as much.
The electric force is a force that is inversely proportional to the square of the distance. This can be proved by Coulomb's Law, which states:
"The electrostatic force [tex]F_{E}[/tex] between two point charges [tex]q_{1}[/tex] and [tex]q_{2}[/tex] is proportional to the product of the charges and inversely proportional to the square of the distance [tex]d[/tex] that separates them, and has the direction of the line that joins them"
Mathematically this law is written as:
[tex]F_{E}= K\frac{q_{1}.q_{2}}{d^{2}}[/tex] (1)
Where [tex]K[/tex] is a proportionality constant.
Now, if we say [tex]q_{1}[/tex] is the proton and [tex]q_{2}[/tex] is the electron, and cut the distance between them in half, the new distance will be [tex]\frac{d}{2}[/tex].
Substituting this new distance in equation (1):
[tex]F_{E}= K\frac{q_{1}.q_{2}}{(\frac{d}{2})^{2}}[/tex] (2)
[tex]F_{E}= 4K\frac{q_{1}.q_{2}}{d^{2}}[/tex] (3)>>>As we can see, the force becomes four times stronger
Answer:
The Answer Is C
Explanation:
The ability to do work or cause change is called ?
energy is the ability to do work or change
Final answer:
Energy is defined as the capacity to do work or cause change, with work being a transfer of energy in the form of a force moving an object over some distance.
Explanation:
The ability to do work or cause change is called energy. When we use energy to perform tasks, such as throwing a ball or warming a house, we are actually transferring energy from one object or system to another. This transfer can occur in the form of work or heat. Specifically, work is done when a force causes matter to move against an opposing force. An example of this would be when you inflate a bicycle tire; you are doing work on the tire by moving air into it against the pressure of the air inside the tire.
In the realm of physics, work is quantified as the product of force exerted on an object and the distance the object moves as a result, which is mathematically expressed as W = F x Δx. The work-energy theorem further relates this work to changes in an object’s kinetic energy, supporting the idea that energy is essential for doing work and causing changes.
Which of the following is the best hypothesis for this experiment? (Remember that the variable we are going to manipulate is the IF part of a hypothesis and the variable we hope will respond and we will measure is the THEN part of a hypothesis.) Question 1 options: a. If I increase the pressure outside of an air filled balloon, then the balloon will become smaller b. If I increase the temperature of the air in a balloon, then the balloon will become larger. c. If I increase the size inside of a balloon, then the air in the balloon will become hotter.
answer would be A becuz that's the only reasonable choice according to real life situations
The best hypothesis for this experiment is that if I increase the pressure outside an air-filled balloon, then the balloon will become smaller. Hence, option (a) is correct.
What is Pressure?The force perpendicularly applied to an object's surface divided by the area over that it is dispersed is known as pressure. The pressure as compared with the surrounding air pressure is referred as gauge pressure.
To express pressure, a variety of measures are employed. Some of these come by dividing a unit of force by a unit of area; for instance, the SI unit of pressure, the pascal (Pa), is equivalent to one newton per square meter (N/m2), whereas the conventional unit of pressure in the metric and U.S. conventional systems is the pound-force per square inch (psi).
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Use the periodic table from the lesson to answer the following question. The atomic mass of F is ___. 9 10 19 55
18.9 but round it and you get 19
In this case if given those choices your answer would be (C. 19).
However in more complicated Chemistry rules you would learn that the periodic table only showcases 1 of the many possible masses of the element.
Hope this help! :D
how much chemical energy must be supplied to a car engine if we want it to produce 5000J of kinetic energy and it is 45% efficient
Here i state the conservation of energy rule and use that to justify my answer. I showed how to manipulate percentages to get the final answer of 11000J (2sf). Hope I'm right xx
11,111.11 J of chemical energy must be supplied to the car engine to produce 5000 J of kinetic energy, given that the engine is 45% efficient.
To find the amount of chemical energy that must be supplied to the car engine to produce 5000 J of kinetic energy, we need to consider the efficiency of the engine.
Efficiency is defined as the ratio of useful output energy to the input energy. In this case, the engine is 45% efficient, which means only 45% of the supplied chemical energy is converted into useful kinetic energy.
Let Echemical be the chemical energy supplied to the engine, and Ekinetic be the kinetic energy produced.
Efficiency (η) = (Useful output energy / Input energy) * 100%
η = (Ekinetic / Echemical) * 100%
Given:
Ekinetic = 5000 J
Efficiency (η) = 45% = 0.45 (in decimal form)
Now, we can rearrange the equation to solve for Echemical:
Echemical = Ekinetic / η
Echemical = 5000 J / 0.45
Echemical ≈ 11111.11 J
Hence, approximately 11,111.11 J of chemical energy must be supplied to the car engine to produce 5000 J of kinetic energy, given that the engine is 45% efficient.
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What is the magnetic flux, in units of mWb (milliWeber), in a cross sectional area of 0.074 m^2 when the magnetic flux density of 0.92 T passes through the area at an angle of 52 degrees?
Answer:
54 mWb
Explanation:
The magnetic flux linkage through the coil is given by:
[tex]\Phi = BA sin \theta[/tex]
where
B is the magnetic field strength
A is the cross sectional area
[tex]\theta[/tex] is the angle between the direction of the field and the normal to the coil
In this problem:
B = 0.92 T
A = 0.074 m^2
[tex]\theta=52^{\circ}[/tex]
Therefore, the magnetic flux linkage is
[tex]\Phi = (0.92 T)(0.074 m^2) sin 52^{\circ}=0.054 Wb=54 mWb[/tex]
Fill in the appropriate values for each blank as it refers to ATOM 1. The number of protons present in ATOM 1 is _________.
The quality or condition of being intense:
A)Electricity
B)Potential Energy
C)Measurement
D)Intensity
d
please give me brainlest
I think that the answer is D, not sure though
tell me if I'm wrong please.
NEED HELP ASAP ONLY HAVE 1 MINUTE !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
A ------ and a-------- are examples of inclined planes.
CHOICES FOR FIRST BLANK: lever and wedge
CHOICE FOR SECOND BLANK:Pulley and screw
My guess is Wedge & Pulley
friction is a force
a. that helps two objects move faster when they are touching.
b. that operates against motion when two objects are touching.
c. that gets stronger when two objects move away from each other.
d. that exists between any two objects in the universe.
NEED ASAP!!
Answer:
The answer is B
That operates against motion when two objects are touching
Explanation:
Friction is a force that operates against motion when two objects or surfaces are touching. Friction is applied in the direction that is opposite the direction of motion.
Friction is a force that operates against motion when two objects are touching. So, option b is correct.
What is meant by friction ?Friction is defined as the opposing force exerted by the surface when an object moves on it.
Here,
Friction is a resistive force that opposes relative motion between two surfaces. It is exerted by the surface on an object that is moving on it, which is in contact with the surface. So, frictional force is a contact force. It prevents sliding or rolling of an object on a surface in contact. It acts against the motion or the applied force. The object can move only if the applied force on the object overcomes the frictional force exerted by the surface. Frictional force is of various types.
Friction can also act on stationary object.
Friction causes wear and tear to the parts of machines.
Friction is known as resistive force because it always acts against the motion when there is a relative motion between surfaces.
Hence,
Friction is a force that operates against motion when two objects are touching. So, option b is correct.
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A candle is placed 40cm in front of a convex mirror with a focal length of 20cm, as shown on the diagram. What is the distance from the lens to the image?
-40 is the correct answer