Answer:
V = IR
Explanation:
I = 15 A
R = 8.0
V = 15 × 8
= 120V
HELP !!
Which of the following ranks these media according to the speed of sound in them from
fastest to slowest?
A. water > air > steel
B. steel > water> air
C. air > water > steel
D. air > steel > Water
Answer:
c
Explanation:
because air have the fastest speed
i’ll give brainliest!! please help and answer correctly! plsss answer quick
Answer:
400N
Explanation:
275+125=400 so 400N is your answer
Answer:
400 N
Explanation:
You just need to add up the force of the two students
1) 1200 J is
the amount of energy that a clothes iron transforms per second, asks:
(I) How many CALs are there ?, (II)
How many KWH are
2) One
Low consumption electric lamp has an efficiency of 30% to illuminate.
If the electrical energy used is 4,500 J, determine the value of the
missing energies.
Answer:
1. i. 286.81 CAL ii. 1.2 KWH
2. 3150 J
Explanation:
1. 1200 J is the amount of energy that a clothes iron transforms per second, asks:
i. (I) How many CALs are there ?
Since the amount of energy that a clothes iron transforms per second is 1200 J. We convert this to calories.
Since 1 cal = 4.184 J,
1200 J = 1200 J × 1 cal/4.184 J = 286.81 Cal.
(II) How many KWH are there
Since the amount of energy that a clothes iron transforms per second is 1200 J = 1200 J/s = 1200 W = 1.2 kW.
So, the amount of energy consumed in 1 hour is 1.2 kW × 1 h = 1.2 kWh = 1.2 KWH
2) One Low consumption electric lamp has an efficiency of 30% to illuminate. If the electrical energy used is 4,500 J, determine the value of the missing energies.
efficiency, η = Energy output E/Energy input E' × 100 %
= E/E' × 100%
Since η = 30% and E' = 4500 J,
E = ηE'/100 % = 30 % × 4500 J/100 % = 0.3 × 4500 J = 1350 J
The missing energy, ΔE = energy input - energy output = E' - E = 4500 J - 1350 J = 3150 J
Another model rocket is accelerating at a rate of 3 m/s2 with a force of 1 N. What is the mass of the rocket?
Answer:
60M
Explanation:
Friction is defined as *
O a force that opposes motion.
O the rate at which velocity changes.
O the resistance of an object to a change in its velocity.
the speed of an object in a particular direction.
Answer:
O a force that opposes motion
The armature of an ac generator is a circular coil with 50 turns and radius 2.30 cm. When the armature rotates at 350.0 rev/min, the amplitude of the emf in the coil is 20.0 V. What is the magnitude of the magnetic field (assumed to be uniform)
Answer:
B = 6.57 T
Explanation:
The amplitude of emf of an AC generator coil can be given by the following formula:
[tex]EMF = N\omega AB[/tex]
where,
EMF = amplitude of emf = 20 V
N = No. of turns = 50
ω = angular speed= (350 rev/min)(2π rad/1 rev)(1 min/60 s) = 36.65 rad/s
A = Cros-sectional area of coil = πr² = π(0.023 m)² = 1.66 x 10⁻³ m²
Therefore,
[tex]20\ V = (50)(36.65\ rad/s)(1.66\ x\ 10^{-3}\ m^2)B\\\\B = \frac{20\ V}{(50)(36.65\ rad/s)(1.66\ x\ 10^{-3}\ m^2)}[/tex]
B = 6.57 T
When light reflects off a rough surface, what happens to the image?
A. It's clear but inverted
B. It's clear and upright
C. It's blurry and inverted
D. No image is formed
Answer:
D. NO MAGE IS FORMEDExplanation:
#CARRY ON LEARNING#MARK BRAINLITSThe light reflects off a rough surface, what happens to the image is that will occurs No image is formed.
How to explain the reflection of light?Reflection of light happens when a ray of light strikes a reflective surface and returns to its original medium. This phenomenon allows us to see all bodies that do not produce their own light, called secondary sources of light or simply illuminated bodies.
Diffuse reflection occurs when light reflects off a rough surface and forms a blurry image or no image at all.
See more about reflection of light at brainly.com/question/26914812
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Examine the illustration. What objects shown in the image do you think have energy? Explain.
NO LINKS!! Will give brainliest.
Answer:So the lamp post is giving energy to the town and the kid is using mecanical energy to ride his skateboard
Explanation:
what energy comes from electric charge, which is one of the fundamental properties of all matter
Answer:
A physical property of matter is electric charge. It is caused by an imbalance in the number of protons and electrons in a material. Whether there are more protons than electrons in a substance, it is positively charged if there are more electrons than protons, it is negatively charged.
Explanation:
Putting your thumb over the end of a hose causes the water to flow out more quickly what law is it
In the diagram, q1= -2.60*10^-9 C and
q2 = -8.30*10^-9 C. Find the magnitude
of the net electric field at point P.
Answer:
The magnitude of the net electric field is:
[tex]E_{net}=90.37\: N/c[/tex]
Explanation:
The electric field due to q1 is a vertical positive vector toward q1 (we will call it E1).
On the other hand, the electric field due to q2 is a horizontal positive vector toward q2(We will call it E2).
Knowing this, the magnitude of the net electric field will be the E1 + E2.
Let's find first E1 and E2.
The electric field equation is given by:
[tex]|E_{1}|=k\frac{|q_{1}|}{d_{1}^{2}}[/tex]
Where:
k is the Coulomb constant (k = 9*10^{9} Nm²/C²)q1 is the first charge d1 is the distance from q1 to P[tex]|E_{1}|=(9*10^{9})\frac{|-2.60*10^{-9}|}{0.538^{2}}[/tex]
[tex]|E_{1}|=80.84\: N/C[/tex]
And E2 will be:
[tex]|E_{2}|=k\frac{|q_{2}|}{d_{2}{2}}[/tex]
[tex]|E_{2}|=(9*10^{9})\frac{|-8.30*10^{-9}|}{1.36^{2}}[/tex]
[tex]|E_{2}|=40.39\: N/C[/tex]
Finally, we need to use the Pythagoras theorem to find the magnitude of the net electric field.
[tex]E_{net}=\sqrt{E_{1}^{2}+E_{2}^{2}}[/tex]
[tex]E_{net}=\sqrt{80.84^{2}+40.39^{2}}[/tex]
[tex]E_{net}=90.37\: N/c[/tex]
I hope it helps you!
Answer:
+90.3 N/C
Explanation:
acellus
help me define the first law of newton?
Explanation:
Newton has given three laws. The laws of motion are as follows :
Newton's first lawNewton's second lawNewton's third lawThe first law of Newton states that an object at rest will remain at rest and an object at motion will remain in motion until and unless an unbalanced force acts on it. Hence, this is the required solution.
Explanation:
Newton's first law states that, if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.
a wagon has a mass of 12 kg it has an acceleration of 3 m/s/s 2 what is the net force that was required for the wagon to have this acceleration
Pls pls pls help me solve this problem
Answer:
[tex]\boxed {\boxed {\sf 36 \ Newtons}}[/tex]
Explanation:
According to Newton's Second Law of Motion, force is the product of mass and acceleration.
[tex]F=m \times a[/tex]
The mass of the wagon is 12 kilograms and the acceleration is 3 meters per square second.
m= 12 kg a= 3 m/s²Substitute the values into the formula.
[tex]F= 12 \ kg \times 3 \ m/s^2[/tex]
Multiply.
[tex]F= 36 \ kg*m/s^2[/tex]
1 kilogram meter per square second ( 1 kg*m/s²) is equal to 1 Newton (N)Our answer of 36 kg*m/s² is equal to 36 N[tex]F= 36 \ N[/tex]
The force required for the 12 kilogram wagon to accelerate at 3 meters per square second is 36 Newtons.
If the mass of an object increases, predict what will happen to the coefficient of sliding friction.
1. The coefficient of sliding friction will increase.
2. The coefficient of sliding friction decrease.
3. The coefficient of sliding friction will stay the same.
4. The coefficient of sliding friction will decrease by half.
According to the video, what do Electrical Engineers usually study in college? Check all that apply.
foreign language
math
history
science
English
The answer is Math and Science, I also put History and it said that was wrong but Math and Science are correct
Answer:
Math & Science
Explanation:
You said so
Answer:
i hope u get it right
Explanation:
How many moles are there in a 2,500 cm 'sample of oxygen at a temperature of 24 °C and a pressure
of 125 kPa?
Explanation:
using the formula pv=nRt where p= pressure =125 v= volume =2500= 25.oom3 to meter n = mumber of moles =? T= temperature = 24 =24+273=297k
[tex]molarity \: \: constant \: = 8.3j mol {}^{- 1} {k}^{- 1} [/tex]
which is given as R so inputting the values we have 125×25=n×8.3×297 3125=2465.1n dividing all with the coefficient of n we have
[tex] \frac{3125}{2465.1} = 2465.1 \24651[/tex]
1.27= n therefore no of moles =1.27The no of moles are there in a 2,500 cm sample of oxygen at a temperature of 24 °C and a pressure of 125 kPa will be 1.27.
What is ideal gas equation?It is the relationship between the pressure,volume and the temperature. Ideal gas equation is found as;
pv=nRt
Given data is;
p(pressure) =125
v(volume) =2500 cm = 25.m³
n(number of moles) =?
T(temperature) = 24°C =24+273=297k
From Ideal gas equation ;
pv=nRt
125×25=n×8.3×297
3125=2465.1 n
n=1.27
Hence,the no of moles will be 1.27.
To know more about the ideal gas equation refer to the link;
https://brainly.com/question/4147359
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Which of the following is not a region of the brain?
Cerebellum
Cortex
Diencephalon
Brain Stem
Waves transport
A.Energy only
B.Mass only
C.Both mass and energy
D.Neither of the two
Answer:
A
Explanation:
In a wave phenomenon, energy can move from one location to another, yet the particles of matter in the medium return to their fixed position. A wave transports its energy without transporting matter.
A spaceship is moving at 1/3 the speed of light (1.0x10^8 m/s) for one year (365 days) relative to earth. How many earth days is this ?
Answer:
256
Explanation:
Many smoke detectors use americium-241to detect very small particulates in the air. This is done by using a stream of radioactive particles that can be stopped by the small smoke particulate. Which type of radiation is MOST LIKELY used in a smoke detector, as it can be stopped by something this small?
a
neutrons
b
beta particles
c
alpha particles
d
gamma radiation
Answer: C.) Alpha Particles
Explanation: Just took it <3
At what distance from a 1.00*10^-5 C charge will the electric potential be 10000 V? (Unit = m)
Answer:
9.0 m
Explanation:
Applying
V = kq/r......................... Equation 1
Where V = Electric potential, q = charge, r = distance, k = Coulomb's constant.
make r the subject of the equation
r = kq/V................... Equation 2
From the question,
Given: q = 1.00×10⁻⁵ C, V = 10000 V
Constant: k = 9.0×10⁹ N⋅m²/C²
Substitute these values into equation 2
r = (9.0×10⁹×1.00×10⁻⁵)/10000
r = 9.0 m
Answer:
9.0
Explanation:
Which is the temperature that Fahrenheit and Celsius thermometers would
read as the same number?
A. -40° c
B. -273° c
c. 100°C
D. 0° C
Answer:
–40o
Explanation:
Scientific ideas about the solar system have changed over time. Which of them
following statements best compares older models of the solar system with the
currently accepted model?
A. In older models, Earth's distance from the sun changed, while in the current
model, Earth's distance from the sun is constant.
B. Older models showed planets moving in circular orbits, while in the current
model, planets move in elliptical orbits.
C. In older models, Venus was closest to the sun, while in the current model,
Mercury is closest to the sun.
D. Older models included ten planets, while the current model includes
eight planets
Answer:
Explanation:
If i'm not wrong and late it might be F
All of the noble gases have _______ electrons in their outer shell
Answer:
8
Explanation:
All noble gasses have 8 electrons in their outer shell
El tren Lima la Orolla va a una velocidad de 10 km/h y de pronto aplica el freno por un derrumbe en la via. Si demora 18 segundos en detenerse ¿Qué distancia recorrerá hasta detenerse completamente?
Answer:
Distancia = 50.04 metros
Explanation:
Dados los siguientes datos;
Velocidad = 10 km/h
Tiempo = 18 segundos
Para encontrar la distancia;
Conversión:
10 km/h = 10 * 1000/3600 = 2.78 m/s
Distancia = velocidad * tiempo
Distancia = 2.78 * 18
Distancia = 50.04 metros
Por lo tanto, el tren viajaría 50.04 metros antes de detenerse por completo.
Answer:
yes
Explanation:
yes
A 2000 kg streetcar parked in a lot has a larger momentum than a 1000 kg car going 25 meters per second on the highway.
Answer:
Other than the fact that momentum is a "vector" quantity I wouldn't know.
If the car had a momentum opposite to the chosen positive direction then its total momentum would be negative.
Use the circuit diagram to decide if the lightbulb will
light. Justify your answer.
Answer:
The lightbulb will not turn on because a switch is connected to it in parallel and when it is closed, like it is now, it becomes a short, by-passing the bulb completely.
Answer:
Sample Response: The lightbulb will not light because this is a short circuit. The branch without the bulb has almost no resistance, so all the current will flow through that branch instead of flowing through the bulb.
Explanation:
Edge 2021-2022 :)
A camera has a lens which is a curved piece of glass. This lens takes the beams of light from an object and redirects it to form a real image. The lens of a camera is shown below. Which of the following best describes how the cameral lens forms a real image.
A. The camera lens reflects light by bouncing it off of the lens.
B. The camera lens absorbs light as it travels through the lens.
C. The camera lens bounces light as it travels through the lens.
D.The camera lens refracts light when it travels through the lens and bends.
Answer:
D.The camera lens refracts light when it travels through the lens and bends.
Explanation:
because
A hot, just-minted copper coin is placed in 101 g of water to cool. The
water temperature changes by 8.39°C and the temperature of the coin
changes by 68.0°C. What is the mass of the coin? Disregard any energy
transfer to the water's surroundings.
Answer:the specific heat is the measure of how much heat per unfit mass required to raise the temperature by 1 degrees Celsius.the formula is given as Q= cm T where
Q= the amount of heat added
C= specific heat of a substance
T= change in temperature in degrees Celsius
Q=(4186 j/kg degrees Celsius (.109 kg) (8.93- degrees Celsius)=4974.53J
Explanation:
The mass of the copper coin placed in 101g of water is 135.3g.
COLORIMETER:The mass of the copper coin can be calculated using the following expression:
Since; Q = mc∆T
Where;
Q = heat absorbed or releasedm = mass of substancec = specific heat capacity of substance∆T = change in temperaturemc∆T (water) = mc∆T (copper)
According to this question;
COPPER METAL:
m = ?c = 0.385 J/g°C∆T = 68°CWATER:
m = 101gc = 4.18 J/g°C∆T = 8.39°C101 × 4.18 × 8.39 = (0.385 × m × 68)
3542.09 = 26.18m
m = 3542.09 ÷ 26.18
m = 135.3g
Therefore, the mass of the copper coin placed in 101g of water is 135.3g.
Learn more about specific heat at: https://brainly.com/question/1209542
What are three things you already know about the game of baseball?
Answer:
The Positions are, Pitcher, Catcher, First base, second base, third base, shortstop, left field, Center field, and right field. Some pitches that they throw are, 4-seam fastball, Curveball, 2-seam fastball, Slider, Knuckleball, 12-6 Curve, Knucklecurve, Slurve, Changeup, Splitter, Cutter, Split-finger fastball, Sinker, Palm ball, Eephus pitch, Screwball, Cut Fastball, Circle Changup, and Forkball. I think thats all the piches i know.