Answer:
1). Current is measured in amps and is represented by the symbol "Δ" The relationship between current, voltage, and resistance is mathematically defined by Ohm's Law.
2). Current is the flow of electrons through a circuit.
Explanation:
1). Current is measured in amps and is represented by the symbol "Δ" The relationship between current, voltage, and resistance is mathematically defined by Ohm's Law.
As per Ohm's law we know that
[tex]V = I R[/tex]
here we have
V = voltage difference across the resistor
R = resistance of the conductor
2). Current is the flow of electrons through a circuit.
Rate of flow of charge is known as electric current
It is given as
[tex]I = \frac{dq}{dt}[/tex]
[tex]I = e\frac{dN}{dt}[/tex]
Current is the flow of electrons through a circuit. Ohm's Law is mathematically represented by the equation V=I/R When solving for Resistance in a current and both voltage and current are known values, the equation to solve reads I =V*R If the voltage in a circuit is increased, the current will also increase. Correct options are 2 and 3.
1. **Current is measured in amps and is represented by the symbol "Δ". The relationship between current, voltage, and resistance is mathematically defined by Ohm's Law.**
- Current is indeed measured in amperes (amps) and is represented by the symbol "I," not "Δ." The statement correctly mentions Ohm's Law, which relates current (I), voltage (V), and resistance (R). However, the symbol "Δ" is not used to represent current.
2. **Current is the flow of electrons through a circuit.**
- This statement is true. Current is the flow of electric charge, typically carried by electrons, through a circuit. Electrons move from the negative terminal to the positive terminal of a voltage source.
3. **Ohm's Law is mathematically represented by the equation V=I/R. When solving for Resistance in a circuit and both voltage and current are known values, the equation to solve reads I = V * R. If the voltage in a circuit is increased, the current will also increase.**
- Ohm's Law is correctly represented by the equation V=I/R. When solving for resistance (R), the equation is R=V/I. However, the last part of the statement is not necessarily true. According to Ohm's Law, if voltage (V) increases, and resistance (R) remains constant, then the current (I) will also increase. But if resistance increases along with voltage, the current may not necessarily increase.
So, the true statements are:
- Statement 2: Current is the flow of electrons through a circuit.
- Statement 3: Ohm's Law is mathematically represented by the equation V=I/R. When solving for resistance in a circuit, and both voltage and current are known values, the equation to solve reads R=V/I. If the voltage in a circuit is increased, and resistance remains constant, the current will also increase.
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Complete question is:
Choose all of the true statements regarding the relationship between voltage, resistance, and current.
1. Current is measured in amps and is represented by the symbol "Δ" The relationship between current, voltage, and resistance is mathematically defined by Ohm's Law.
2. Current is the flow of electrons through a circuit.
3. Ohm's Law is mathematically represented by the equation V=I/R When solving for Resistance in a current and both voltage and current are known values, the equation to solve reads I =V*R If the voltage in a circuit is increased, the current will also increase.
A 1.5kg ball is thrown at 10 m/s what is the balls momentum
the ball's momentum is 10 × 1.5 = 15 kg m/s
Answer : The momentum of ball is, 15 kg.m/s
Explanation :
Momentum : It is defined as the motion of a moving body. Or it is defined as the product of mass of velocity of an object.
Formula of momentum is:
[tex]p=mv[/tex]
where,
p = momentum = ?
m = mass = 1.5 kg
v = velocity = 10 m/s
Now put all the given values in the above formula, we get:
[tex]p=(1.5kg)\times (10m/s)[/tex]
[tex]p=15kg.m/s[/tex]
Therefore, the momentum of ball is 15 kg.m/s
Describe the path of blood through the heart, starting at the superior and inferior vena cava and leaving the aorta.
The superior and inferior vena cava are the two main blood vessels that bring de-oxygentated blood back to the heart after the blood's done a circuit of the body to offload its oxygen to organs and muscles and tissues and cells, etc. The blood from these vessels enters the right atrium of the heart. Once the atrium is full of blood it contracts, pushing the blood through the open tricuspid valve into the right ventricle of the heart. The tricuspid valve closes shut once the blood is in the right ventricle, preventing the blood from returning to the right atrium. While the valve is closed, the ventricle contracts, pushing the blood out of the heart through the pulmonic valve, into the pulmonary artery, where it is carried directly to the lungs where it gets a new supply of oxygen attached to it. The freshly oxygenated blood courses along the pulmonary vein from the lungs back to the heart, entering the heart's left atrium. When the left atrium is full of blood, it empties by contraction, through the open mitral valve, into the left ventricle of the heart. The mitral valve then closes, so the blood cannot retrace its path. The left ventricle then contracts, pushing the blood out of the heart through the aortic valve into the big blood vessel called the aorta, from where it courses round the body delivering oxygen again.
Answer:
superior vena cava right atrium tricuspid valve right ventricle pulmonary arteries lungs capillariespulmonary veins left atrium mitral or bicuspid valve left ventricle aortic valve aorta body.Explanation:
what force is required to give an object with mass 125 kg an acceleration of 3 m/s^2
Answer:
Force = 375 Newton or 375 kg m/s²
Explanation:
Force is the product of the mass of a body and the acceleration . Force is usually the push or pull of the mass of an object that is accompanied by the motion(acceleration). Force is a vector quantity because it has both magnitude and direction. Example is when you throw a ball you apply a push, with the mass of the ball and the acceleration computed you can calculate the force applied .
Mathematically, force can be represented as
Force = mass × acceleration
F = ma
Force is measured in Newton or Kg m/s²
From the question;
mass = 125 kg
acceleration = 3 m/s²
Force = 125 × 3 = 375 Newton or 375 kg m/s²
Force = 375 Newton or 375 kg m/s²
What do the metric prefixes milli-, centi-, micro-, kilo-, and mega- mean?
Milli- ... thousandth ... 0.001
Centi- ... hundredth ... 0.01
Micro- ... millionth ... 0.000 001
Kilo- ... thousand ... 1,000
Mega- ... million ... 1,000,000
A ball is thrown with an initial speed of 10. Meters per second. At what angle above the horizontal should the ball be thrown to reach the greatest height?
The initial speed doesn’t matter. To reach the maximum height, you need to launch straight up ... 90 degrees above horizontal.
Answer:
90 degree
Explanation:
The height for the projectile motion is given by
H = u^2 Sin^2 theta/ 2g
Height is maximum when sin theta is maximum.
Sin theta is maximum when it's value is 1.
So the value of theta is 90 degree.
A car is traveling at a constant speed of 12m/s , when the driver accelerates the car reaches a speed of 26 m/s in 6s what is the acceleration of the car
Answer: 2.3 m/s/s
Explanation:
The car is traveling at a constant speed of 12 m/s and after acceleration, the speed is 26 m/s so the acceleration of the car will be 2.33 m/s².
What is Acceleration?The ratio of velocity to time is referred to as acceleration. It is a vector quantity with SI unit m/s².
There are several types of acceleration :
Uniform AccelerationNonuniform AccelerationAverage AccelerationInstantaneous AccelerationAccording to the question,
The initial velocity of the car, (u) is given as 12 m/s,
The final velocity of the car, (v) is given as 26 m/s and,
The time, (t) is given as 6 seconds
Use the equation of motion,
v = u + at
26 = 12 + (a)6
a = 14/6
a = 2.33 m/s².
Hence, the acceleration of the car is 2.33 m/s².
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Which electromagnetic waves have the longest wavelengths?
A.radio waves
B.X-rays
C.gamma rays
D.visible light
i need the answer ASAP!!!
The answer is Radio Waves
Explain the effect of earths gravity on objects on the surface of earth?
Answer:
Gravity pulls objects toward Earth.
The rate of acceleration due to gravity is 9.8 m/s2.
Weight on Earth’s surface is a result of gravity’s pull.
Explanation:
these are the answers for e2020
Gravity is a fundamental force that gives weight to objects and causes freefall. On Earth, it also causes the ocean tides and affects time, making it pass slower closer to Earth's surface. In our universe, it plays a vital role in the dynamics of celestial bodies.
Explanation:Gravity is a force of attraction that exists between any two masses, any two bodies, any two particles. It is mathematically described as: F = G *(m1*m2)/r^2 where F is the force of attraction between the two bodies, m1 and m2 are the two masses, r is the distance between the centers of the two masses and G is the gravitational constant.
On Earth, gravity gives weight to physical objects and causes the ocean tides. The force of Earth's gravity comes from the object's mass and the acceleration due to gravity, which is approximately 9.8 m/s^2 at sea level. When an object is in freefall, the only force acting upon it is gravity.
Gravity also affects time and space, causing time to pass more slowly closer to the surface of the Earth compared to further away. This concept is known as time dilation. In essence, gravity is a crucial force that plays a key role in the structure and lifecycle of planets and the orbital movement of celestial bodies.
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An object is dropped from a height of 25 meters. At what velocity will t hit the ground?
A.7.0
B.11
C.22
D.49
E.70
Given data
height (h) = 25 m ,
velocity (v) = ?
we know that,
v²-u² = 2as
initial velocity (u) = 0,
a = g = 9.8 m/s ,
Now the equation becomes,
v² = 2 × g × h
= 2 × 9.8 × 25
v² = 490.5
v = √490.5
v = 22.1 m/s
Therefore answer is C , i.e., 22 m/s (If you like this procedure, give me brainiest)
Answer:
c
Explanation:
A lawnmower engine running for 20 minutes does 4560000 j of work. What is the power output of the engine
Answer:
tim e (t) = 20 min.
= 20 × 60 = 1200 s ,
Work ( W) = 4560000 J
= 4560 KJ ,
Determine:
Power output (P) = Work ÷ time
= 4560 ÷ 1200
P = 3.8 KW
Which of these circuit schematics has a DC voltage source?
Answer:
(C) (see image of it attached)
Answer: circuit C
Explanation:
A DC voltage source supplies current in single direction. It is represented by alternate small and big straight lines.
An Ac voltage source supplies alternating current i.e. the current changes direction.
In the given circuit diagrams, only circuit C has a DC voltage source.
If I decrease the wavelength of an electromagnetic wave what will happen to the frequency of the wave?
This can be viewed as a decrease in the wavelength of the wave. A decrease in wavelength at a constant speed is associated with an increase in frequency since waves follow the equation v=f*λ, where λ is the wavelength and f is the frequency.
Dave throws a tennis ball straight up into the air he throws the ball with mass of 0.07 kg A speed of 28 m/s how high does the ball go
Answer:
Explanation:
first notice some physics; the mass of the ball (projectiles) is not germane. A 2 ton elephant launched at U = 28 m/s will go just as high, which is H = U^2/2g = 28^2/(2*9.8) = 40 meters.
The process of calculating the height reached by the ball involves equating the kinetic energy at the beginning of its trajectory with the potential energy at its highest point. By assigning values to the mass and initial speed variables in the equation (1/2 × m × v² = m×g×h), we find that the ball reaches a height of approximately 40 meters.
Explanation:The subject of this question is physics, specifically a concept known as projectile motion. When Dave throws the tennis ball straight up into the air, the ball has initial kinetic energy but loses this energy as it gains potential energy, causing it to decelerate until it reaches its maximum height and momentarily stops before falling back down.
We can calculate the height using the formula for kinetic and potential energy. The initial kinetic energy (K.E) is given by the formula 1/2 × m × v², where m is the mass of the ball and v is the initial velocity of the ball. The potential energy (P.E) at the highest point is given by the formula m×g×h, where g is the acceleration due to gravity and h is the height. Therefore, the initial kinetic energy equals the maximum potential energy (1/2 × m × v² = m×g×h)
Since we know the mass (0.07 kg) of the ball and the speed (28 m/s) at which it was thrown, we can substitute these values into the equation to calculate the maximum height, h.
So, h = (1/2 × m × v²) / (m×g) = (1/2 × 0.07 kg × (28 m/s)²) / ( 0.07 kg × 9.8 m/s²). Therefore, the tennis ball will reach a height of approximately 40 meters.
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Why does a large container of boiling water contain more heat than a kilogram of lead at 300°c7? O because lead Is heavier than water and will not absorb as much heat O because water will vaporize faster and change to steam, therefore absorbing more heat than the lead O because the specific gravity of lead is much greater than that of water, keeping it from absorbing as o because water's specific heat is much greater than that of lead, therefore this amount of lead cannot contain as much heat
It is because of the differences in specific heats. The specific heat of water is much higher than that of lead. It takes more heat to raise water to a boiling point and keep it there than it takes lead to maintain a temperature of of 300oC.
It's all due to specific heat. The answer, though poorly worded, is the last choice.
Answer:
because water's specific heat is much greater than that of lead, therefore this amount of lead cannot contain as much heat.
The ms = 0.5645 and mk=0.1113 for a 30 N box on level ground. What level force is needed to keep it moving at a constant velocity
Answer:
3.339 N
Explanation:
In this problem, the box is moving at constant velocity, so the box is in motion and therefore we can consider only the kinetic friction.
The resultant of the forces acting on the box must be equal to the product of mass and acceleration:
[tex]F_{net}=ma[/tex]
However, the box is moving at constant velocity, so the acceleration is zero: a=0. Therefore,
[tex]F_{net}=0[/tex] (1)
There are two forces acting on the box:
- The push: F
- The kinetic friction on the box, equal to
[tex]-\mu_k mg[/tex]
where [tex]\mu_k = 0.1113[/tex] is the coefficient of kinetic friction and (mg)=30 N is the weigth of the box, and where the negative sign means it is in the opposite direction of the motion.
Therefore, eq.(1) becomes
[tex]F-\mu mg =0\\F= \mu mg=(0.1113)(30 N)=3.339 N[/tex]
Find the momentum of a 25kg object going 4 m/s.
p=m•v=25•4=100 kg•m/s
As asked in question the momentum of the 25kg object moving at 4 m/s is 100 kilogram meters per second (kg·m/s).
To calculate the momentum of a 25-kilogram object moving at a speed of 4 meters per second, you can use the formula for momentum:
Momentum (p) = Mass (m) × Velocity (v)
Where:
Mass (m) is 25 kilograms (kg)
Velocity (v) is 4 meters per second (m/s)
Now, plug in these values:
Momentum (p) = 25 kg × 4 m/s = 100 kg·m/s
So, the momentum of the 25kg object moving at 4 m/s is 100 kilogram meters per second (kg·m/s).
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how much energy is required to turn 20 gram cube of ice at a temperature of -10 degrees Celsius into liquid water at a temperature of 10 degrees Celsius
Given that:
Mass (m) = 20 g = 0.02 Kg,
temperature (T₁) = -10°C = -10+273 = 263 K
temperature (T₂) = 10°C = 10+273 = 283 K
Specific heat of water (Cp) = 4.187 KJ/Kg k
We know that Heat transfer (Q) = m. Cp.( T₂ - T₁)
= 0.02 × 4.187 × (283-263)
Q = 1.67 KJ
Heat transferred is 1.67 KJ
how long does it take fossil fuels to form ?
It takes fossil fuels to form millions of years thats why they are regarded as non-renewable socrce of fuels
look at the pendulum diagram. at which point is the kinetic energy of the pendulum the greatest
Position ' C ' is the middle of the swing. That's where the weight is the lowest.
It's also the place where the weight is moving the fastest, so that means it's the place where the kinetic energy is greatest.
Answer:
At point C
Explanation:
The velocity of the pendulum is maximum at its mean position, i.e., at C.
Formula for Kinetic energy is given by
[tex]K = 1\div 2\times m\times v^{2}[/tex]
As velocity is maximum at C so kinetic energy is also maximum at C.
50 Points! I am so Confused an some1 help meh?
Reactants
steel wool
Steel Wool
(6 grams)
+
oxygen
Oxygen
(1 gram)
=
Product
question mark
iron oxide
Iron Oxide
(7 grams)
Reactants
egg
Egg
(45 grams)
+
hot frying pan
Heat
=
Product
Cooked Egg (41 grams) + Cracked Egg Shell (4 grams)
Reactants
Water
(75 grams)
+
Heat
=
Product
Steam
(75 grams gas released)
Reactants
Zinc
(10 grams)
+
Hydrogen Chloride
(5 grams)
=
Product
Zinc Chloride (12 grams) + Hydrogen Gas (3 grams released)
Reactants
glass test tube with sodium hydroxid
Sodium Hydroxide
(10 grams)
+
glass beaker with copper sulfate
Copper Sulfate
(57 grams)
=
Product
blurred image
glass beaker with sodium sulfate and copper hydroxide
Sodium Sulfate (47 grams) + Copper Hydroxide (20 grams)
Answer:
the second one
Explanation:
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if you invite me i will gift you.
Miss Hu taught her class what makes night and day on Earth. She could not use the real Sun. She used a light bulb instead. In this case, the light bulb is a __________ of the Sun. A) method B) model C) sign D) system
B. model; it is the model of the sun
Answer: B
Explanation: a light bulb
Which statement best describe he work of Marie and Pierre cutie? Check all that apply
There are no statements that describe the Curies' work well on the list of choices you provided.
(And their name was "Curie", not "Cutie".)
there is no answer choices
The diagram shows the movement of air as a result of convection currents. At which point is the air at its highest density?
X
Hot air rises = it's less dense than cold air = falls
Answer: X
Explanation:
In the given diagram, air moves as a result of convection currents. The air at the bottom, near the space heater gets heated up. As temperature rises, the density of air reduces. It becomes less dense and rises up. The least dense is at W. As the air rises, it gets cooled and becomes more dense and heavier and thus, sinks down. The highest density of air would be at X.
An element has three stable isotopes. One has a mass number of 63 and an abundance of 50%. The second has a mass number of 65 and an abundance of 30%. The third has a mass number of 67 and an abundance of 20%. Calculate the relative atomic mass of this element. Give your answer to one decimal place.
63x1/2 + 65x0.3 + 67x1/5
=
64.4 average atomic mass
PLEASE HELP, BRAINLIEST
Object C has a mass of 3,600 kilograms. Object D has a mass of 900 kilograms.
The weight of Object D will be ________ times the weight of Object C if both objects are placed on the same planet.
1⁄6
1⁄4
1
4
m1=3600 kg
m2=900 kg
G1=m1g
G2=m2g
G2/G1=m2g/m1g=m2/m1=3600/900=4
Answer:
The answer is B. 1/4
Explanation:
Both objects are on the same planet therefore gravity acts the same upon each.
Object C mass is 3600 kg.
Object D mass is 900 kg.
The mass of Object C is 4 times the mass of Object D. (3600 / 900=4)
The mass of Object D is 1/4 times the mass of Object C. (900 / 3600=1/4)
Mass is proportional to weight. The more the mass, the more the weight.
Object C is heavier. Object D is lighter.
It's asking for the weight ratio of Object D to Object C therefore 900 is divided by 3600 to come to 1/4.
A toy car with a mass of 2kg starts at rest. A spring performs 196 joules of work on the car. What is the toy cars final velocity
W = work done by the spring on the toy car = 196 Joules
m = mass of the toy car = 2 kg
v₀ = initial velocity of the car when at rest = 0 m/s
v = final velocity of the car after spring does work on it = ?
According to work-change in kinetic energy, net work done on an object is same as the change in kinetic energy of the object . hence
Net work done = Final kinetic energy - initial kinetic energy
W = (0.5) m (v² - v₀²)
inserting the values
196 = (0.5) (2) (v² - (0)²)
v² = 196
v = sqrt(196)
v = 14 m/s
The final velocity of the toy cars is 14 m/s
Given data:
The mass of toy car is, m = 2 kg.
The work performed by the spring is, W = 196 J.
In the given problem, the work done by the spring provides the necessary kinetic energy to the toy car. Therefore, work -energy theorem can be applied.
According to work-energy theorem, the work done on an objects is equal to the change in kinetic energy of the object .So,
W = KE
Solving as,
[tex]W = \dfrac{1}{2} mv^{2} \\\\196=\dfrac{1}{2} \times 2 \times v^{2}\\v = 14 \;\rm m/s[/tex]
Thus, we can conclude that the final velocity of the toy cars is 14 m/s .
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Easy question. Answer should include one line reasoning
The number-labels don't show in the picture, so we don't know the number of the correct one.
The correct path is the one shown in the upper-right panel. The path of the light beam forms the shape of the letter ' V ', with the point at the bottom, down on the book.
Can anyone solve this numerical
Answer is 2ohms
Answer:
4 Ohms
Explanation:
The challenging part in this circuit is the bridged setup (diamond-shaped arrangement made of the 4 Ohm resistors). In general, this would first need to be transformed using the Wye-Delta transform to be solved, but in this case we can make a valid simplification: since the diamond arrangement is completely symmetrical, the voltage at the top and the bottom tip of the "diamond" will be identical and no current flows through the 4 Ohm bridge, hence, this resistor can be removed without changing the resulting resistance. After this, it is easy to see that the equivalent resistance of the modified "diamond" is just 4 Ohms.
The remaining top parallel branch of the circuit will be 8 Ohms, and the bottom parallel branch is nominally 8 Ohms. The resulting resistance therefore is 4 Ohms.
(The answer is not 2 Ohms!)
Two 1-kg point masses a distance d apart each exert a gravitational attraction F on the other one. If 1 kg is now added to each mass, the gravitational attraction exerted by each will be _____.
Question: Two 1-kg point masses a distance d apart each exert a gravitational attraction F on the other one. If 1 kg is now added to each mass, the gravitational attraction exerted by each will be
Answer: 4f
Explanation: a gravitational force is propotional to a square of distance between two point masses so we separate the masses to a distance
question answered by
(jacemorris04)
We know that the gravitational force is proportional to (m₁) · (m₂).
Now we want to know the force between (2·m₁) · (2·m₂).
Well, that's just the same as (2·2) · (m₁)·(m₂), which is 4 · (m₁)·(m₂) ... four times the original force.
So in this question, the new pair of gravitational forces will be 4·F in each direction.
If Mrs. Reichelt throws a chromebook, because it won't login correctly, with a force of 8N, and the chromebook accelerates at 5m/s2, what is the mass of the chromebook
Answer:
1.6 kg
Step-by-step Solution:
Since Force = mass × acceleration we have:
F = 8N
a= 5 m/s^2
m = ?
By plugging the values above into F=ma we obtain:
[tex]F=ma\\\\8=m(5)\\\\\frac{8}{5}=\frac{m(5)}{5}\\\\m=\frac{8}{5}=1.6[/tex]
Therefore, the Chromebook has a mass of 1.6 kilograms.
Using Newton's second law of motion, we estimate that the mass of the chromebook would be 1.6 kg if it is thrown with a force of 8N and an acceleration of 5m/s².
In order to find the mass of the chromebook, we can use Newton's second law of motion, which states that Force equals Mass times Acceleration (F = ma).
If Mrs. Reichelt throws the chromebook with a force of 8N and it accelerates at 5m/s2, we can rearrange the equation as follows: Mass equals Force divided by Acceleration (m = F/a).
m = 8N / 5m/s2
As a result, the mass of the chromebook is 1.6 kg.
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