What causes an electric current in a wire?
Well let's analyse.
First we know Ohm's law of resistance that states:
[tex]R=\dfrac{U}{I}[/tex]
Where R is resistance, U is voltage and I is current.
If we express current we get:
[tex]I=\dfrac{U}{R}[/tex]
Because resistance cannot be equal to 0 (violation of mathematical law) the only thing that may cause current being zero is voltage.
Which means that as long as your voltage is bigger than 0V then there will be current (if we are talking about AC).
So to answer the question: Electric current is caused by voltage and regulated by resistance.
Hope this helps.
r3t40
Charlie Brown kicks a football at 24.5 m/s at 35.0. What is the maximum height of the ball?
Answer:
d = 10.076 m
Explanation:
We need to obtain the velocity of the ball in the y direction
Vy = 24.5m/s * sin(35) = 14.053 m/s
To obtain the distance, we use the formula
vf^2 = v0^2 -2*g*d
but vf = 0
d = -vo^2/2g
d = (14.053)^2/2*(9.8) = 10.076 m
Answer:
10.076
Explanation:
help please........easy question
A small turtle moves at a speed of 186 furlongs per fortnight
Find the speed of the turtle in centimeters per second. Note
that 1 furlong = 220 yards and 1 fortnight = 14 days.
Answer:
3.09 cm /sec.
Explanation:
Speed = distance / time taken
= 186×220× 91.44 cm/sec
1×14×86400
= 3.09 cm /sec.
Note: 1 yard = 91.44 centimeters
And 1 day= 24×60×60= 86400 seconds.
The speed of the small turtle in centimeters per second is 3.1 cm/s.
The given parameters:
speed of the small turtle, v = 186 furlongs per fortnight
1 furlong = 220 yards
1 fortnight = 14 days
To find:
the speed of the turtle in centimeters per secondFind the equivalent yard in centimeter and equivalent seconds in a day:
1 yard = 91.44 cm1 day = 86,400 sCalculate the speed of the small turtle in centimeters per second:
[tex]v = 186 \ \frac{furlong}{fortnight} \times \frac{220 \ yards}{1 \ furlong} \times \frac{1 \ fortnight}{14 \ days} = 2922.857 \ \frac{yards}{day} \\\\In \ centimeter \ per \ second:\\\\v = 2922.857 \ \frac{yards}{day} \times \frac{91.44 \ cm}{1 \ yard} \times \frac{1 \ day}{86400 \ s} = 3.1 \ \frac{cm}{s}[/tex]
Thus, the speed of the small turtle in centimeters per second is 3.1 cm/s.
Learn more here: https://brainly.com/question/1832698
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A line has a slope of 5 and a y-intercept of 0 Which is the equation of the line?
Answer:
y=5x
Explanation:
it would be y=5x because in slope intercept form, y=mx+b, the "m" equals the slope, so when it says that the slope is 5, you plug it in there. And then the b is the y intercept, so because it is 0, you don't put anything down
light refracts because
Answer:
it travels at a different refractive index.
Explanation:
for example when light travels into water, it slows down, causing it to continue to travel at a different or another angle or direction. hope this helped!
Refraction of light occurs due to the different refractive indices of the medium in which the light travels.
Explanation:
The medium through which the light travels have different refractive indices, because of which the light rays crosses the boundary of the refractive indices. They are shifted from the travelling line according to the refractive index of the medium and hence, refraction is seen.
For example, air is medium with less refractive index as compared to glass, and therefore the light ray when enters into glass, travels slow and refracted from the actual path towards the normal of the ray.
Which is not a step in the rock cycle?
Answer:
You didn't provide any answer choices so, I'll tell you the steps in the rock cycle.
1. weathering and erosion
2. transportation
3. deposition
4. compaction
5. cementation
Hope this helps!
Which of the following describes water
Water is a liquid, that is wet. Water is formed by 2 hydrogen atom and 1 oxygen atoms. Water can be a solid, aka ice, a liquid, aka H2O, and a gas, aka water vapor.
I hope that this is all the info you need, if you need more on water please commit my answer, and please mark me as brainiest answer.
An electric oven has a resistance of 201 ohms and a voltage of 220 V. How much current does it draw?
a) 11 A
b)1.1 A
c)1,100 A
d) 110 A
1.1 A. An electric oven with a resistance of 201Ω and a voltage of 220V drwa a current of 1.1 A.
The easiest way to solve this problem is using the Ohm's Law I = V/R.
An electric oven has R = 201Ω, and a drop of voltage V = 220v, solve using I = V/R:
I = 220V / 201Ω
I = 1.09 A ≅ 1.1 A
Which of the following has potential but not kinetic energy
Answer:- Potential energy is the amount of energy a object has while it's at rest (or not moving) Kinetic energy is how much energy a object is while it's moving
Explanation:
I don't understand what you mean by "the following" or "which of", and there are no suggestions listed to pick from.
If any of the THESE things is on this list in the place where you copied the question from, then it's the answer. If none of these is on the list, then you're on your own.
-- A bowling ball on the floor in the upstairs closet.
-- A car up on the rack having an oil-change.
-- A helicopter hovering 10-ft off the ground.
-- A mosquito hovering 10-ft off the ground.
-- A helium party balloon hovering 10-ft off the ground, with its string tied to a chair.
-- A regular party balloon full of regular air, with its string tied to a chair, and dangling down the back of the chair.
-- A regular party balloon full of regular air, tied to a hook in the ceiling, dangling down but not reaching the floor.
-- A gallon of gasoline, in the tank of your car, that has not burned yet.
-- A kitchen match, in the box, that has not burned yet.
-- A birthday candle, standing up in the middle of a rose on the cake, that has not been lit yet.
-- A stick of dynamite that has not been lit yet, lying on the ground.
-- A firecracker that has not been lit yet, lying on the ground.
-- A squirrel sitting up in the tree watching me walk by on the ground.
-- A bird sitting up in the top of the tree watching the squirrel.
-- A chewed up piece of roast beef that has not been digested yet, lying in your stomach.
-- A chewed up piece of roast beef that has not been digested yet, lying in MY stomach. (A more satisfying example)
-- A tree branch that broke off in the wind yesterday and is lying on the roof of your house.
-- The air that is right under the ceiling in your bedroom.
-- YOU, when you are fast asleep in the top bunk in your bedroom.
-- A rifle bullet that was fired straight up, reached the peak of its trajectory, and is just about to start falling downward in 0.001 second from now.
-- The rocket that was launched, went straight up for a while, ran out of fuel, continued to coast straight up for a while, reached the peak of its trajectory, and is just about to start falling downward in 0.001 second from now.
A standard for comparison that helps to ensure that the experimental result is caused by the condition being tested is the ____.
Answer:
A standard for comparison that helps to ensure that the experimental result is caused by the condition being tested is the 'control'.
Explanation:
Control is the standard used for the comparison which helps to make sure that the results of a certain experiment are caused by the condition which is being tested.
In controlled experiments, only one variable is changed at a time while the other variable (controlled variable) is kept same in order to isolate the results.
How many countries are in the world?
Answer:
195 countries
Explanation:
There are only 195 countries within the whole world.
The name of the Sl unit for magnetic field strength, such as that created around a current-carrying wire, is the _________
pls help!!!!!
Answer: Tesla
Explanation:
Answer:
Tesla
Explanation:
Edge 2021
Selma made a diagram to compare convection and radiation.
Which label belongs in the area marked X?
Must involve temperature differences between substances or objects
Only occurs when molecules are in direct contact
Involves the movement of fluids based on density differences
Can occur where there is little or no matter
Answer:
Can occur where there is little or no matter.
Explanation:
Radiation is mode of heat transfer that does not necessarily have to involve a medium. Radiation occurs fastest in a vacuum where it has a speed of c- the speed of light where heat energy is transferred in photons. The factors that affect radiation include the distance between the producer of the heat and the receiver and the temperature of the producing body.
Answer:
Can occur with little or no matter
Explanation:
When a person spins a bucket of water in a circle, the force acting on the bucket to keep the water inside is called
Answer:
centripetal force
Explanation:
When a person spins a bucket of water in a circle, the force acting on the bucket to keep the water inside is called centripetal force.
The centripetal force is a constant resultant force that acts on an object in circular motion.
Answer:
centripetal force
Explanation:
GUESS WHAT??? I'LL MAKE YOU BRAINLIEST!!!! PLEASE ANSWER THIS FASTTTTT
Which astronomer supported the belief that Earth was at the center of the universe, while all other planets and celestial objects orbited around it?
A) Kepler
B) Brahe
C) Ptolemy
D) Hubble
Answer:
c. Ptolemy
Explanation:
Ptolemy was the one to believe that other planets and celestial objects orbited around the earth
Hello There!
The answer to your question is C) Ptolemy
Claudius Ptolemy was famous for being a greek astronomer. He was the one who introduced the "Geocentric Theory"
Bohr found experimental evidence for his atomic model by studying
Answer:
Bohr found experimental evidence for his atomic model by studying line spectra.
Answer:
Bohr found experimental evidence for his atomic model by studying line spectra.
Line Spectra is plural of a line spectrum and a line spectrum is an emission of light, sound, or other radiation, composed of a number of discrete frequencies or energies (a spectrum).
(\) QueTooOfficial (/)in which type of circuit does charge move in only one direction?
A. An AC circuit
B. A parallel circuit
C. A combined circuit
D. A DC circuit
In the DC circuit, the charge move in only one direction, Option D is correct.
What is a DC circuit?Electric Current flows in only one direction in a Direct Current circuit. Many low-voltage applications use DC, particularly those that are battery-powered. A DC power supply is necessary for most electronic circuits.
In the DC circuit, the charge move in only one direction,
Hence, option D is correct.
To learn more about the DC circuit, refer to the link;
https://brainly.com/question/11851328
#SPJ2
Isaac Newton used a ____ to break white light into its component colors.
In the eighteenth century Isaac Newton found out that when a beam of light from the Sun, passes trhough a prism is decomposed in many different colors. He named this phenomenom as dispersion of light.
This phenomenom occurs when a beam of white light (which is compound of many wavelengths or "colors") is refracted (the different rays of light are diverted depending on their wavelengths) in some medium, leaving their constituent colors separated.
Therefore:
Isaac Newton used a prism to break white light into its component colors.In physics the desire of an object to keep doing what it is doing is termed?
Answer:
In Physics, the desire of an object to keep doing what it is doing is termed as Inertia.
Explanation:
Inertia is the quality of an object due to which it does nothing or remains unchanged.
According to Newton's first law of motion "An object at rest remains at rest or keeps moving in a straight line with uniform speed unless an external force is acted upon it."
This law is also known as the Law of Inertia.
Which statement is an example of the law of conservation of energy? A soccer ball eventually stops because its energy disappears. When a light bulb is turned on, electrical energy is converted to light and heat. An automobile engine burns gasoline to converts its chemical energy to electrical energy.
-- A soccer ball eventually stops because its energy disappears. No. Energy does NOT "disappear". That would exactly violate the whole concept of energy conservation.
-- When a light bulb is turned on, electrical energy is converted to light and heat. Gosh Yes ! This statement tells where the energy comes from, what happens to it, and where it goes. In a sloppy floppy way, it incorporates all of the highlights of energy conservation.
-- An automobile engine burns gasoline to converts its chemical energy to electrical energy. No. When you look closely at this statement, MOST of the energy involved is missing and unaccounted for. The statement only accounts for starting the motor and running the car radio. It completely ignores the huge amount of mechanical energy produced from the gasoline.
Answer:
No
Yes
No
Explanation:
;0 literally just did it lol
Use the right-hand rule for magnetic force to determine the charge on the moving particle. This is a charge.
Answer:
Use the right-hand rule for magnetic force to determine the charge on the moving particle.
This is a
negative
charge
Explanation:
Answer:
The answer is negative
Explanation:
An object dropped from Cliff falls with a constant acceleration of 10 metre per second square find its Speed of two seconds after it was dropped
Answer:
20 meters per second
Explanation:
If an object accelerates for 2 seconds, and accelerates by 10 meters per second, then that objects speed will be 20 meters per second, assuming hat there are no other factors involved.
Answer:
20 meters per second
Explanation:
All you have to do is multiply 10 meter by the speed of two seconds which is 20 METERS PER SECOND
PLEASE MARK BRAINLIEST KIND PERSON :)
~Luis~
An object that weighs 75n is pulled on a horizontal surface by a horizontal pull of 50 N to the right. The friction force on this object is 30 N to the left. What is the acceleration of the object?
Answer:
2.67 N/kg
Explanation:
We are given that an object that weighing 75 N is pulled on a horizontal surface by a horizontal pull of 50 N to the right with 30 N friction to the left.
We are to find the acceleration of the object.
Mass = 75/10 = 7.5 kg
Acceleration = Net Force / mass
Net force = Horizontal force - Frictional force = 50 - 30 = 20
Acceleration of the object = 20 / 7.5 = 2.67 N/kg
Answer:
[tex]2.61m/s^2[/tex]
Explanation:
We first of all find the net force F acting on the object. The frictional force [tex]F_f[/tex] and the pulling force [tex]F_p[/tex] act in opposite directions. Hence the net force is given as follows;
[tex]F=F_p-F_f...............(1)\\Given;\\F_p=50N\\F_f=30N\\Hence;\\F=50-30\\F=20N[/tex]
It is this net force that brings about the acceleration of the body. Recall that
[tex]F=ma..............(2)[/tex]
where m is the mass of the object and a is the acceleration.
The weight W of the object is given, hence we obtain its mass as follows;
[tex]W=mg..............(3)[/tex]
where g is acceleration due to gravity taken as [tex]9.8m/s^2[/tex].
Given;
W = 75N
[tex]75=m*9.8\\m=\frac{75}{9.8}\\m=7.65kg[/tex]
From equation (2), we have
[tex]a=\frac{F}{m}..................(4)[/tex]
Hence;
[tex]a=\frac{20}{7.65}\\a=2.61m/s^2[/tex]
a sled of mass 8 kg slides across the ground with a friction force of 16.46 n what is μk between the sled and the ground?
a. 2.1
b. 0.49
c. 0.83
d. 0.21
D. μk = 0.21. The coefficient of kinetic friction μk is 0.21.
The key to solve this problem is using the equation of kinetic friction force Fk = μk*n, where μk is the coefficient of kinetic friction, and N is the normal force n = m*g.
Clear μk from the equation Fk = μk*n:
μk = Fk/n
With Fk = 16.46N, and n = 8kg*9.8m/s²
μk = 16.46N/(8kg*9.8m/s²)
μk = 0.21
Answer: D: .21 on apex :)
Explanation:
Which unit is equivalent to j/s
To be honest, there's no sure way to answer that, because you haven't defined your terms and we can't be sure of what j or s might be.
Tell you what I'll do:. I'll assume definitions for j and s, and then I'll answer the question that I invented.
Assume that j stands for Joule, the unit of energy. And assume that s stands for 'second', the unit of time.
Then j/s is the rate of transferring energy or doing work.
Its unit is the Watt, equivalent to 1 Joule per second.
In your system of notation, it would be 'w' .
Answer:
Watts
Explanation:
sing the Law of Gravitation, explain why the moon orbits the earth and the planets orbit the sun.
Use the drop-down menus to complete the statements.
have a definite shape and volume.
do not have a definite volume or shape.
have a definite volume, but the shape may change.
Answer:
solids have definite shape and volume, liquids have definite volume, but no definite shape, gas has no definite shape or volume. I hope that this is what you was looking for.
Answer:
Solids
Gases
Liquids
Explanation:
Solids have the strongest inter-molecular forces in them, this causes them to have a definite shape and volume.
Gases have the weakest inter-molecular forces in them, this causes them not to have a definite volume or shape. Moreover gases are compressible which means with enough pressure the volume may change for the same number of particles.
Liquids have weaker inter-molecular forces than solids but stronger than gases, this causes them to have a definite volume, but indefinite shape.
A large truck is moving 22.0 m/s. If it’s momentum is 125,000 kg • m/s, what is the trucks mass
Answer:
p = mv
m = p/v = 125000/22 = 5682 kg
Explanation:
Direct application of the momentum equation
p = mv
where,
p: momentum
m: mass
v: object velocity
steps:
-------
1) check for units consistency ( SI or Imperial)
2) separate the variable you are looking for.
3) DONE! :DD
Answer:
the answer is C. 5680 kg
Explanation:
on larry foe nem
need help with both questions
Answer:
b then c
Explanation:
What types of energy are involved in a chemical reaction
Final answer:
Chemical reactions involve the conversion of thermodynamic energy and kinetic energy. Thermodynamic energy changes determine if a reaction is exothermic or endothermic, while kinetic energy is needed to overcome activation energy. Potential energy stored in chemical bonds is often converted into other forms like mechanical kinetic energy.
Explanation:
Chemical reactions always involve changes in energy. There are two main types of energy relevant to reactions: thermodynamic energy and kinetic energy. Thermodynamic energy is related to the energy changes when reactants convert to products, which can be either released or absorbed. This type of energy change defines whether a reaction is exothermic or endothermic. Kinetic energy, on the other hand, is the energy that reacting molecules must possess to overcome the energy barrier to react and form products, known as the activation energy.
In the course of a reaction, chemical bonds break and new ones form. The energy stored in these bonds is a form of potential energy. When substances convert, there is a conversion of energy forms - for example, chemical potential energy can be converted to mechanical kinetic energy, such as in a car engine where the combustion of gasoline moves pistons.