Answer:
the fish wilil appear to be purple
Explanation:
If the current in the circuit is 10.5 A,
what is the potential difference across the
source?
(AI 0.750 V
(B) 9.19 V
(C) 12.0 V
(D) 49.0 V
(E) 147 V
Answer:
E) 147 V
Explanation:
Ra+Rb+Rc = 14.0
V = IR
V = (10.5)(14.0)
V = 147 V
The potential difference across the source will be c)12V
What is Ohm's law ?Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points .
since , R(A) , R(B) AND R(C) are in parallel combination , hence equivalent
resistance of the circuit will be
1/R = 1/R(A) + 1/ R(B) + 1/ R(C)
1/R= 1/2 + 1/4 +1/8
1/R = 7/8
R = 8/7 ohm
from ohm's law
Voltage = current * resistance
V( source ) = current (in circuit ) * R (equivalent resistance)
V = 10.5 * (8/7)
V = 12 V
The potential difference across the source will be c) 12V
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find the resultant resistance of the circuit
Answer:
R = 1.71 ohms
Explanation:
Two resistors are connected in parallel. There equivalent resistance is given by :
[tex]\dfrac{1}{R}=\dfrac{1}{R_1}+\dfrac{1}{R_2}[/tex]
Put all the values,
[tex]\dfrac{1}{R}=\dfrac{1}{3}+\dfrac{1}{4}\\\\R=1.71\ \Omega[/tex]
So, the resultant resistance of the circuit is equal to 1.71 ohms.
What is the time it takes a tow truck to pull a car if it has 1,850,000J of work and 370,000 Watts of power ?
P = W / t
370,000 = 1,850,000 / t
t = 1,850,000 / 370,000
t = 185 / 37
t = 5 seconds
Which of the following is a scientific question?
A. What is the best price for an LED screen design?
B. Which LED screen design produces the most attractive images?
C. Which LED screen design is the most energy efficient?
D. Does the LED screen design violate a previous patent?
Answer:
I think the answer would be c
Explanation:
A. is not scientific
B. is subjective, so it can't be scientific.
C. can be studied with an experiment
D. relates to regulations, not science
Shaneil was able to hold up a 20N box for 40s to test her strength. What power was exerted to hold up the box?
Answer: 0
Explanation:
Given
Shaneil hold the 20 N box for 40 s
Since there is no movement of the box, so velocity associated with it is zero and the workdone by the shaniel is also zero.
Power is the rate of doing work. Therefore, it is also zero.
explain why temperature first increases, then begins to decrease throughout the day
Answer:
As you increase in elevation, there is less air above you thus the pressure decreases. As the pressure decreases, air molecules spread out further (i.e. air expands) and the temperature decreases.
A loaded spring launches a 2.50 kg block, using a force of 450 N. If the change in
momentum is 12.0 kg*m/s, how long was the block in contact with the spring?
Answer:
37.5 seconds
Explanation:
The given parameters are;
The mass of the block on the spring, m = 2.50 kg
The force with which the loaded spring launches the block, F = 450 N
The change in momentum of the block, Δp = 12.0 kg·m/s
We have;
Let the force with which the block was launched = The net force, [tex]F_{NET}[/tex]
By Newton's second law of motion, we have;
F = [tex]F_{NET}[/tex] = Δp × Δt
Where;
Δt = The time the block is in contact with the spring
Therefore;
[tex]\Delta t = \dfrac{F_{NET}}{\Delta p}[/tex]
By plugging in the values for [tex]F_{NET}[/tex] and Δp, we have;
[tex]\Delta t = \dfrac{450 \ N}{12.0 \ kg \cdot m/s} = 37.5 \ s[/tex]
The time duration the block is in contact with the spring, Δt = 37.5 seconds.
. It requires 250 N to lift up a bag full of hockey equipment. How much work is done while carrying it 12 m down the stairs into the basement?
( only need answer no work is needed )
Answer:
Explanation:
Work = force times displacement, therefore,
W = 250(12) so
W = 3.0 × 10³ N*m
La corriente en un circuito se triplica conectando una R1 = 500 Ω en paralelo con la resistencia R del circuito. Determinar R en ausencia de R1
Answer:
R = 1000 ohm
Explanation:
In a circuit with a resistor R, the current is
V = i R
i₀ = V / R
a resistor R₁ is placed in parallel and the current is tripled i = 3 i₀
V = i Req
i = V / Req
3i₀ = V / Req
we substitute
3 (V / R) = V / Req
3 / R = 1 / Req
R = 3 Req
the equivalent resistance of the two resistors in parallel is
[tex]\frac{1}{R_{eq}} = \frac{1}{R} + \frac{1}{R_1}[/tex][tex]\frac{1}{R_{eq}} = \frac{R_1 + R}{R \ R_1}[/tex]
R_{eq} = [tex]\frac{R \ R_1}{R + R_1}[/tex]
R / 3 = \frac{R \ R_1}{R + R_1}
⅓ (R₁ + R) = R₁
R = 3R₁ -R₁ = 2 R₁
R = 2 500
R = 1000 ohm
The earth revolves around the sun in its orbit as shown in the figure. Is there any difference in the amount of gravitational force of the sun towards the earth when the earth moves from a point A to point B on its orbit? Explain.
Answer:
No.
Explanation:
There is no change in gravitational force based on the sizes remaining the same. If there was a change in gravitational force the orbits of all planets would change.
There are 2 pans of water, one has 10 mL in it and one has 500 mL. You add 3000 joules of energy, which one has the bigger change in temperature?
Answer:
The change in temperature is bigger for the first pan which contains 10 mL of water.
Explanation:
in one pan
mass, m = 10 mL = 10 g
in another pan
mass, m' = 500 mL = 500 g
Heat, H = 3000 J
Specific heat of water, c = 4.2 J/gC
Let the change in temperature in first pan is T and in the second pan is T'.
Use the formula of heat
H = m c T
For the first pan
3000 = 10 x 4.2 x T
T = 71.42 C
For the second pan
3000 = 500 x 4.2 x T'
T' = 1.42 C
So, the change in temperature is bigger for the first pan.
How much would an 80.0kg person weigh on Mars, where the acceleration of gravity is 3.93m/s and in Earths moon, where the acceleration of gravity is 1.63m/s
Answer:
this is the answer
Explanation:
This is the solution, hope it helps
Compare and contrast fluorescent and incandescent light bulbs.
Answer:
The biggest difference between the two is in how they produce light. Incandescent bulbs produce light by a heating a metallic filament until it starts to radiate light. On the other hand, fluorescent lamps produce light by exciting a gas and causing it to glow.
Explanation:
13. Which cart has the greatest inertia?
1. a 1-kg cart traveling at 4 m/s
2. a 2-kg cart traveling at 3 m/s
3. a 3-kg cart traveling at 2 m/s
4. a 4-kg cart traveling at 1 m/s
Andy has two samples of liquids. Sample A has a pH of 4, and sample B has a pH of 6. What can Andy conclude about these two samples?
Sample A is
, and sample B is
What is the equivalent resistance of the
circuit?
(A) 0.07142
(B) 0.875 22
(C) 1.14 12
(D) 4.67 22
(E) 14.0 22
Answer: The correct option is (B) 0.875 Ω.
Explanation:
Equivalent resistance: It is defined as the sum of the all resistance present in the circuit.
There are two conditions:
(1) Resistors in series
Equivalent resistance, [tex]R_s=R_1+R_2+R_3+R_4........R_n[/tex]
(2) Resistors in parallel
Equivalent resistance, [tex]R_p=\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}+\frac{1}{R_4}........\frac{1}{R_n}[/tex]
According to the given circuit, the resistors are in parallel arrangement.
Given:
[tex]R_A=2.00\Omega\\\\R_B=4.00\Omega\\\\R_C=8.00\Omega[/tex]
Thus,
Equivalent resistance will be:
[tex]R_p=\frac{1}{R_A}+\frac{1}{R_B}+\frac{1}{R_C}\\\\R_p=\frac{1}{2.00}+\frac{1}{4.00}+\frac{1}{8.00}\\\\R_p=0.875\Omega[/tex]
Therefore, the equivalent resistance of the circuit is 0.875 Ω.
free!!!!!!!!!!!!!!!!!!!
why not
but
you must answer these two questions...
Was the night at the museum trilogy good?
Is JedTavius a real ship?
Answer:
UH TAHNKYOU VERY MUCH SIR UH HAVE A GOOD DAY
Explanation:
A ball moving with an initial velocity of 5 m/s comes to rest after 2s. What was the ball's acceleration?
Answer:
-2.5m/s²
Explanation:
The acceleration of a body is giving by the rate of change of the body's velocity. It is given by
a = Δv / t ----------------(i)
Where;
a = acceleration (measured in m/s²)
Δv = change in velocity = final velocity - initial velocity (measure in m/s)
t = time taken for the change (measured in seconds(s))
From the question;
i. initial velocity = 5m/s
final velocity = 0 [since the body (ball) comes to rest]
Δv = 0 - 5 = -5m/s
ii. time taken = t = 2s
Substitute these values into equation (i) as follows;
a = (-5m/s) / (2s)
a = -2.5m/s²
Therefore, the acceleration of the ball is -2.5m/s²
NB: The negative sign shows that the ball was actually decelerating.
Un pasajero desea subir a un microbus que se encuentra detenido y corre tras el con una velocidad uniformde de 5m/s
Answer:
20 metros en 4 segundos.
Explicación:
Un pasajero quiere subirse a un microbús que está parado y corre tras él con una velocidad uniforme de 5 m / s por lo que tomará el autobús 4 segundos si el autobús está a 20 metros de distancia porque la persona se mueve con una velocidad uniforme de 5 metros en uno. segundo para que la persona pueda alcanzar 20 metros de distancia en 4 segundos, por lo que podemos concluir que la persona llega al autobús en 4 segundos.
Which statement best describes the difference between endothermic and exothermic reactions?
They are opposites because endothermic reactions require energy and exothermic reactions release energy.
They are opposites because endothermic reactions release energy and exothermic reactions require energy.
They the same because they are both ways of forming precipitates.
They the same because they are both ways of forming gasses.
Mark this and return
Answer:
The correct answer would be "They are opposites because endothermic reactions require energy and exothermic reactions release energy".
5.00 L of circulating gas has a constant temperature of 75.0 ⁰C and a pressure of 200. kPa. What is the new volume in liters if the pressure is cut in half ?
Answer:
https://mi01000971.schoolwires.net/cms/lib05/MI01000971/Centricity/Domain/470/gases_hw_packet_key.pdf
Explanation:
the magnificat of image produced by a concave lens is always less than 1. why?
Answer: Concave lens makes the virtual image. So the image distance turns to be negative which also cause the magnification to be negative.
Which speed have humans not yet travelled?
Answer:
light waves i think
Explanation:
may also be sound waves
Answer: The speed of light.
Explanation:
The speed of light is the fastest in the universe.
Kinetic energy is the _____ of motion.
Kinetic energy is the energy which a body possesses by virtue of being in motion. Thus, kinetic energy is the energy of motion.
What is kinetic energy?In physics, an object's kinetic energy is the energy it has as a result of its motion. It is defined as the amount of work required to accelerate a body of a given mass from rest to a given velocity. The standard unit of kinetic energy is the joule. Kinetic energy is a property of a moving object or particle and depends not only on its motion but also on its mass.
The body retains its kinetic energy after gaining it during acceleration unless its speed changes. The body does the same amount of work when slowing down from its current speed to rest.
Therefore, kinetic energy is the energy of motion.
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A CD player spins at 8590rpm. If it starts from rest and has an acceleration of 450rad/s² how long does it take to reach full speed?
Answer:
ਹੈਲੋ, ਇੰਡੀਆ ਦਾ ਆਪਣਾ ਵੀਡੀਓ ਐਪ - ਰੋਪੋਸੋ ਤੇ Manjeet Warval ਦਾ ਵੀਡੀਓ ਦੇਖੋ | ਨਾਲ ਹੀ PM ਮੋਦੀ ਦੇ 'ਵੋਕਲ ਫ਼ਾਰ ਲੋਕਲ' ਮੋਹਿਮ ਨੂੰ ਸਫ਼ਲ ਬਣਾਉਣ ਲਈ ਰੋਪੋਸੋ ਤੇ 5 ਕਰੋੜ ਤੋਂ ਜ਼ਿਆਦਾ ਭਾਰਤੀਆਂ ਦੇ ਨਾਲ ਜੋੜੋ| ਹੁਣੇ ਰੋਪੋਸੋ ਐਪ ਡਾਊਨਲੋਡ ਕਰੋ ਅਤੇ 100 ਕੋਇਨਜ਼ ਪਾਣ ਲਈ 24 ਘੰਟੇ ਦੇ ਅੰਦਰ ਸਾਇਨ ਅੱਪ ਕਰੋ|ਹੈਲੋ, ਇੰਡੀਆ ਦਾ ਆਪਣਾ ਵੀਡੀਓ ਐਪ - ਰੋਪੋਸੋ ਤੇ Manjeet Warval ਦਾ ਵੀਡੀਓ ਦੇਖੋ | ਨਾਲ ਹੀ PM ਮੋਦੀ ਦੇ 'ਵੋਕਲ ਫ਼ਾਰ ਲੋਕਲ' ਮੋਹਿਮ ਨੂੰ ਸਫ਼ਲ ਬਣਾਉਣ ਲਈ ਰੋਪੋਸੋ ਤੇ 5 ਕਰੋੜ ਤੋਂ ਜ਼ਿਆਦਾ ਭਾਰਤੀਆਂ ਦੇ ਨਾਲ ਜੋੜੋ| ਹੁਣੇ ਰੋਪੋਸੋ ਐਪ ਡਾਊਨਲੋਡ ਕਰੋ ਅਤੇ 100 ਕੋਇਨਜ਼ ਪਾਣ ਲਈ 24 ਘੰਟੇ ਦੇ ਅੰਦਰ ਸਾਇਨ ਅੱਪ ਕਰੋ|ਹੈਲੋ, ਇੰਡੀਆ ਦਾ ਆਪਣਾ ਵੀਡੀਓ ਐਪ - ਰੋਪੋਸੋ ਤੇ Manjeet Warval ਦਾ ਵੀਡੀਓ ਦੇਖੋ | ਨਾਲ ਹੀ PM ਮੋਦੀ ਦੇ 'ਵੋਕਲ ਫ਼ਾਰ ਲੋਕਲ' ਮੋਹਿਮ ਨੂੰ ਸਫ਼ਲ ਬਣਾਉਣ ਲਈ ਰੋਪੋਸੋ ਤੇ 5 ਕਰੋੜ ਤੋਂ ਜ਼ਿਆਦਾ ਭਾਰਤੀਆਂ ਦੇ ਨਾਲ ਜੋੜੋ| ਹੁਣੇ ਰੋਪੋਸੋ ਐਪ ਡਾਊਨਲੋਡ ਕਰੋ ਅਤੇ 100 ਕੋਇਨਜ਼ ਪਾਣ ਲਈ 24 ਘੰਟੇ ਦੇ ਅੰਦਰ ਸਾਇਨ ਅੱਪ ਕਰੋ|ਹੈਲੋ, ਇੰਡੀਆ ਦਾ ਆਪਣਾ ਵੀਡੀਓ ਐਪ - ਰੋਪੋਸੋ ਤੇ Manjeet Warval ਦਾ ਵੀਡੀਓ ਦੇਖੋ | ਨਾਲ ਹੀ PM ਮੋਦੀ ਦੇ 'ਵੋਕਲ ਫ਼ਾਰ ਲੋਕਲ' ਮੋਹਿਮ ਨੂੰ ਸਫ਼ਲ ਬਣਾਉਣ ਲਈ ਰੋਪੋਸੋ ਤੇ 5 ਕਰੋੜ ਤੋਂ ਜ਼ਿਆਦਾ ਭਾਰਤੀਆਂ ਦੇ ਨਾਲ ਜੋੜੋ| ਹੁਣੇ ਰੋਪੋਸੋ ਐਪ ਡਾਊਨਲੋਡ ਕਰੋ ਅਤੇ 100 ਕੋਇਨਜ਼ ਪਾਣ ਲਈ 24 ਘੰਟੇ ਦੇ ਅੰਦਰ ਸਾਇਨ ਅੱਪ ਕਰੋ|ਹੈਲੋ, ਇੰਡੀਆ ਦਾ ਆਪਣਾ ਵੀਡੀਓ ਐਪ - ਰੋਪੋਸੋ ਤੇ Manjeet Warval ਦਾ ਵੀਡੀਓ ਦੇਖੋ | ਨਾਲ ਹੀ PM ਮੋਦੀ ਦੇ 'ਵੋਕਲ ਫ਼ਾਰ ਲੋਕਲ' ਮੋਹਿਮ ਨੂੰ ਸਫ਼ਲ ਬਣਾਉਣ ਲਈ ਰੋਪੋਸੋ ਤੇ 5 ਕਰੋੜ ਤੋਂ ਜ਼ਿਆਦਾ ਭਾਰਤੀਆਂ ਦੇ ਨਾਲ ਜੋੜੋ| ਹੁਣੇ ਰੋਪੋਸੋ ਐਪ ਡਾਊਨਲੋਡ ਕਰੋ ਅਤੇ 100 ਕੋਇਨਜ਼ ਪਾਣ ਲਈ 24 ਘੰਟੇ ਦੇ ਅੰਦਰ ਸਾਇਨ ਅੱਪ ਕਰੋ|
A 0.413 kg block requires 1.09 N
of force to overcome static
friction. What is the coefficient
of static friction?
(No unit)
Answer:
Explanation:
The equation for this is
f = μ[tex]F_n[/tex] where f is the frictional force the block needs to overcome, μ is the coefficient of static friction, and [tex]F_n = w=mg[/tex] (that means that the normal force is the same as the weight of the block which has an equation of weight = mass times the pull of gravity). Filling in:
1.09 = μ(.413)(9.8) and
μ = [tex]\frac{1.09}{(.413)(9.8)}[/tex] so
μ = .27
The coefficient of static friction for the given block is equal to 0.27.
What is static friction?Static Friction can be defined as friction that is experienced by an object when it is placed on a surface. Kinetic friction can be defined as friction due to the movement of a body on a surface. The coefficient of static friction can be described as a scalar parameter and is denoted as μs.
The coefficient of static friction can be determined from the following expression:
[tex]\displaystyle \mu_s = \frac{F}{mg}[/tex]
Where F is the applied force, m is the mass of the object and g is the gravitational acceleration.
Given, the force acting on the block to overcome static friction = 1.09 N
The mass of the block, m = 0.413 Kg
The gravitational acceleration, g = 9.8m/s²
The coefficient of static fraction = 1.09/(0.413 ×9.8) = 0.27
Therefore, the coefficient of static friction is 0.27.
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50.0 meters away from a building. Tip of the building makes an angle of 63.0° with the horizontal. What is the height of the building
Answer:
98.13m
Explanation:
Complete question
Daniel is 50.0 meters away from a building. Tip of the building makes an angle of 63.0° with the horizontal. What is the height of the building
CHECK THE ATTACHMENT
From the figure, using trigonometry
Tan(θ ) = opposite/adjacent
Where Angle (θ )= 63°
Opposite= X = height of the building
Adjacent= 50 m
Then substitute the values we have
Tan(63)= X/50
1.9626= X/50
X= 1.9626 × 50
X= 98.13m
Hence, the height of the building is 98.13m
is the outer electron in potassium more or less strongly attracted to the positive nucleus than the outer electron in sodium is?
Answer:
Less strongly attracted.
Explanation:
Potassium and sodium are both alkali metals. That means that they have the ability to be able to gather more valence electrons. They will both gain a positive particle. The potassium electron is less attracted because of the fact that now the sodium has a positive chargem and the electron has a negative charge.
Some giant ocean waves have a wavelength of 25 m and a frequency of
0.26 Hz. What is the wavespeed of such a wave? *
Answer:
Explanation:
The frequency equation for waves is
[tex]f=\frac{v}{\lambda}[/tex] where f is the frequency, v is the velocity, and lambda is the wavelength. Filling in:
[tex].26=\frac{v}{25}[/tex] so
v = .26(25) and
v = 6.5 meters/second
What will be the ME of a machine that produces a 240 N work with a 300
N work input?
Given:
Solution:
Answer:
Answer:
Efficiency = 80%
Explanation:
Given the following data;
Work output = 240 N
Work Input = 300 N
To find the mechanical efficiency of a machine;
[tex] Efficiency = \frac {Out-put \; work}{In-put \; work} * 100 [/tex]
Substituting into the equation, we have;
[tex] Efficiency = \frac {240}{300} * 100 [/tex]
[tex] Efficiency = 0.8 * 100 [/tex]
Efficiency = 80%
Therefore, the mechanical efficiency of the machine is 80 percent.
