Answer:
Electric current, I = 4.08 A
Explanation:
We have,
Power of vacuum cleaner is 500 W
Resistance of vacuum cleaner is 30 ohms
It is required to find the current flowing through the vacuum cleaner. It can be calculated using the definition of power delivered. Its formula is given by :
[tex]P=I^2R[/tex]
I is electric current
[tex]I=\sqrt{\dfrac{P}{R}} \\\\I=\sqrt{\dfrac{500}{30}} \\\\I=4.08\ A[/tex]
So, the electric current flowing through the vacuum cleaner is 4.08 A.
How was Mendeleev's table different from Meyer's table? A. Mendeleev did not arrange according to chemical properties. B. Meyer did not arrange by atomic mass but Mendeleev did. C. Meyer did not leave gaps while Mendeleev did. D. Mendeleev did not arrange according to physical properties.
Answer: C. Meyer did not leave gaps while Mendeleev did.
Explanation: Mendeleev's table was table different from Meyer's table because Meyer did not leave gaps while Mendeleev did.
Which equation is used to calculate the electric potential in an electric field from a point charge?
O v=ko
Ovako
AV = 40
O AV=AU
Answer: Its B on Edge
Explanation: Trust
If you drew magnetic field lines for this bar magnet, which statement would be true?
A. Arrows pointing away from both north and south
B. Arrows pointing toward both north and south
C. Arrows point away from north and toward south
D. Arrow point away from south and towards north
Final answer:
The correct answer is C. Arrows point away from north and toward south.
Explanation:
The correct answer would be option C. Arrows point away from north and toward south. In a bar magnet, the magnetic field lines are defined to have the direction that a small compass points when placed at a location. If we use small compasses to map the magnetic field around a bar magnet, they will point away from the north pole of the magnet and toward the south pole of the magnet. So, the magnetic field lines would point away from the north pole and towards the south pole of a bar magnet.
What produces a person’s voice?
the alveoli
the lungs
the vocal cords
the diaphragm
Answer:
Vocal Cords
Explanation:
Air passes through the vocal cords causing them to vibrate.
Answer:
the vocal cords
Explanation:
How does a seat belt stop your body from moving in a forward motion in a car?
The seatbelt acts as an opposing force coming from the car.
The inertia from the seatbelt stops your body from moving forward when the car stops.
The seatbelt defies gravitational laws to help you from moving forward.
When a moving car suddenly stops, your body is still moving forward until the seatbelt stops you.
Answer:
It's D
Explanation:
I have the answer key
Wind and water power are types of
energy?
A)renewable
B)nonrenewable
A rural mail carrier logged the mileage on the odometer at the start of the mail route as 31,500 miles. After 6.5 hours, the carrier returned the truck and recorded the mileage at 31,713 miles. What was the average velocity of the mail truck? Explain your reasoning.
Answer:[tex]32.77\ mi/hr[/tex]
Explanation:
Given
Initially Reading on the odometer is [tex]31,500\ miles[/tex]
Final reading on the odometer is [tex]31,713\ miles[/tex]
Time taken is [tex]t=6.5\ hr[/tex]
average velocity [tex]=\dfrac{\text{Displacement}}{\text{time}}[/tex]
[tex]v_{avg}=\dfrac{31713-31500}{6.5}[/tex]
[tex]v_{avg}=\dfrac{213}{6.5}[/tex]
[tex]v_{avg}=32.77\ mi/hr[/tex]
Thus the average velocity of mail truck is [tex]32.77\ mi/hr[/tex]
Green plants convert light energy from the sun into ______. * a. gravitational potential energy b. chemical potential energy c. thermal energy d. mechanical energy
Answer:
chemical potiential energy
Answer:
A: Gravitational potential energy
Explanation:
Plants use the energy of the sun to transform it to food which is energy that is stored and is used to "work"
Moon phases are named after the shape the moon resembles during that time. What is is called when the shape of the moon is between a half circle and a full circle.
crescent
semi-full
three-fourths
gibbous
Answer:
waxing gibbous moon so in this case gibbous
Explanation:
Explain how Lee’s surrender at Appomattox affected the South’s Civil War effort.
Explanation:
Lee's surrender did not end the Civil War, but it was the beginning of the end. The surrender of other Confederate armies began shortly after: The Army of Tennessee surrendered on April 26, 1865. Confederate armies in Alabama, Mississippi, and eastern Louisiana all surrendered on May 4, 1865.
Answer please I need help f
Answer:
1.f 2.c 3.d 4.e 5.d 6.a
Explanation:
The third sentence is the inertial law itself. Concentrate in understanding that, and you will understand everything. For example, planets move for billion years because there is no friction in space, which help to understand the second sentence. Mass and inertia is practically the same thing. That's what explain why heavy objects are harder to change its motion. But, if an object has an unbalanced force, the net force is not zero, and if there is no friction, the object will change its motion.
A thermometer is placed in water in order to measure temperature. What would cause the liquid in the thermometer to drop?
Answer:The kinetic energy of the water molecules decreases. ... The motion of the particles in the substance decreases, and the temperature of the substance increases.
Explanation:
Answer:
The molecules in the thermometer’s liquid spread apart.
Explanation:
An object is located 10.0 cm from a convex mirror. The magnitude of the
mirror focal length is 15.0 cm. What is the image distance? Use the equation
df
d-f
A. -30.0 cm
B. 6.00 cm
C. 30.0 cm
D. -6.00 cm
SUBT
Answer:
-6.00 - a p e x
Ayan warms some hot chocolate in a microwave oven. Which reasoning explains how the particles that make up the hot chocolate different as the temperature increases?
They move slower.
They have less energy.
They move farther apart.
They are arranged in a pattern.
Answer:
They move farther apart
Explanation:
When objects heat up they expand for example heating up a balloon makes it expand
Active noise cancelling headphones measure the various sound
waves of the environment around them and produce an inverted wave
of what it "hears". This process partially cancels the noise outside of
the headphones. What is this process called?
Select one:
A)Destructive Interference
B)The Doppler Effect
C)Constructive Interference
D)Resonance
Answer: A) Destructive Interference
Explanation: Wave Interference can be simply defined as a phenomenon that result into creating a higher amplitude, lower amplitude or thesame amplitude of wave as two or more waves superpose.
Destructive Interference is when two waves with opposite or different amplitude but equal frequency cancel the effect of each other out as they superpose.
The active noise cancelling headphones produces an inverted wave to cancel out the noises it picks from it's surrounding, this process is called Destructive Interference.
A medium is a substance or material in which a wave can travel through. True or False
The answer is:
True
Hope this Helps
Please mark my nswer as brainliest?
Mercury
What shape is the orbit of Mercury?
Why do you think the Sun is not at the center of Mercury’s orbit?
What did you notice about the motion of Mercury in its orbit?
Earth
What is the orbit of the Earth?
Is the Sun at the center of the Earth’s orbit?
Describe the motion of the Earth throughout its orbit?
Does it move at constant speed?
Mars
What is the orbit of the Mars?
Is the Sun at the center of the Mars’s orbit?
Describe the motion of Mars throughout its orbit?
Does it move at constant speed?
Saturn
What is the orbit of the Saturn?
Is the Sun at the center of the Saturn’s orbit?
Describe the motion of Saturn throughout its orbit?
Does it move at constant speed?
Neptune
What is the orbit of the Neptune?
Is the Sun at the center of the Neptune's orbit?
Describe the motion of Neptune throughout its orbit?
Does it move at constant speed?
Comet
What is the orbit of the comet?
Is the Sun at the center of the comet’s orbit?
Describe the motion of the comet throughout its orbit?
Does it move at constant speed?
Will award brainiest to whoever answers all the questions completely. Will report any dumb or incomplete answers.
Question is worth 50 points!
Answer/Explanation:
Mercury
1) What is the orbit of the Mercury?
The shape of the orbit is oval
2) Is the Sun at the center of the Earth’s orbit?
No
3) Describe the motion of the Earth throughout its orbit?
Starts fast then gets slower then begins to speed up again
4) Does it move at constant speed?
No
Earth
1) What is the orbit of the Earth?
The shape of the orbit is circular
2) Is the Sun at the center of the Earth’s orbit?
Yes
3) Describe the motion of the Earth throughout its orbit?
Travels at a steady consistent speed.
4) Does it move at constant speed?
Yes
Mars
1) What is the orbit of the Mars?
The shape of the orbit is circular
2) Is the Sun at the center of the Earth’s orbit?
Yes
3) Describe the motion of the Earth throughout its orbit?
Travels at a steady consistent speed.
4) Does it move at constant speed?
Yes
Saturn
1) What is the orbit of the Saturn?
The shape of the orbit is circular
2) Is the Sun at the center of the Earth’s orbit?
Yes
3) Describe the motion of the Earth throughout its orbit?
Travels at a steady consistent speed.
4) Does it move at constant speed?
Yes
Neptune
1) What is the orbit of the Neptune?
The shape of the orbit is circular
2) Is the Sun at the center of the Earth’s orbit?
Yes
3) Describe the motion of the Earth throughout its orbit?
Travels at a steady consistent speed.
4) Does it move at constant speed?
Yes
Comet
1) What is the orbit of the Comet?
The shape of the orbit is oval
2) Is the Sun at the center of the Earth’s orbit?
No
3) Describe the motion of the Earth throughout its orbit?
starts slow and gets faster and faster
4) Does it move at constant speed?
No
The orbits of Mercury, Earth, Mars, Saturn, Neptune, and comets around the Sun are elliptical, with the Sun at one of the two foci. Their motion is not at a constant speed but is faster when they are closer to the Sun in accordance with Kepler's laws of planetary motion.
Explanation:The orbits of the planets and comet in our solar system, including Mercury, Earth, Mars, Saturn, Neptune, and comets are all elliptical, not circular. This is according to Kepler's First Law of Planetary Motion. The Sun is not at the center of these orbits but at one of the two foci of the ellipse.
The motion they follow around the Sun, known as orbital motion, is not at a constant speed. This is according to Kepler's Second Law, which states that a line joining a planet and the Sun sweeps out equal areas in equal intervals of time. This means when the planet is closer to the Sun in its orbit, it moves faster. And when it's farther from the Sun, it moves slower.
The same applies to a comet. A comet's orbit can be highly elliptical, and it moves fastest when it is closest to the Sun (the perihelion).
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A wave with a frequency of 90 Hz is traveling at a speed of 250 m/s
Answer:
The wavelength of wave is 2.78 m.
Explanation:
Frequency of a wave is 90 Hz
Speed of a wave is 250 m/s
It is assume to find the wavelength of wave. The formula of speed is given by :
[tex]v=f\lambda\\\\\lambda=\dfrac{v}{f}\\\\\lambda=\dfrac{250}{90}\\\\\lambda=2.78\ m[/tex]
So, the wavelength of wave is 2.78 m.
what type of electromagnetic waves is released by all objects?
a) Visible light waves
b) Microwaves
c) X-ray waves
d) UV light waves
e) Radio waves
f) Gamma-ray waves
g) Infrared waves
Answer:
a)Visibile light waves
Explanation:
Answer: A, B, G
Explanation:
The human body stores chemical energy from digested food. Some of the chemical energy is converted into mechanical energy when the body moves. Which statement is best supported by this information?
Answer:
Digested food is a source of potential energy
Explanation:
A steel railroad track has a length of 39 m
when the temperature is 8°C.
What is the increase in the length of the
rail on a hot day when the temperature is
37°C? The linear expansion coefficient of
steel is 11 x 10 6 (°C) 1.
Answer in units of in.
Answer:
.
Explanation:
The increase in the length of the 39 m steel railroad track when the temperature rises from 8°C to 37°C is approximately 0.492 inch, calculated using the linear thermal expansion formula ΔL = αLΔT.
The question asks for the increase in the length of a steel railroad track when the temperature rises from 8°C to 37°C. To find the increase in length, we can use the formula for linear thermal expansion: ΔL = αLΔT, where ΔL is the change in length, α is the coefficient of linear expansion, L is the original length, and ΔT is the change in temperature.
Given:
α (coefficient of linear expansion of steel) = 11 x 10-6 °C⁻¹L (original length of steel track) = 39 mΔT (change in temperature) = 37°C - 8°C = 29°CUsing the formula:
ΔL = αLΔT
ΔL = (11 x 10-6 °C⁻¹)(39 m)(29°C)
ΔL = 0.012507 m
To convert ΔL to inches, we use the conversion factor 1 inch = 0.0254 m:
ΔL = 0.012507 m / 0.0254 m/inch
ΔL ≈ 0.492 inch
Therefore, the increase in the length of the steel rail on a hot day when the temperature is 37°C is approximately 0.492 inch.
At a constant pressure, 10 L of a gas at 546 K is cooled to 273 K
What would be the final volume of the gas?
Answer:
5 L
Explanation:
Ideal gas law:
PV = nRT
If P, n, and R are constant, then:
n₁R/P₁ = n₂R/P₂
Using ideal gas law, we can rewrite this as:
V₁/T₁ = V₂/T₂
This is known as Charles' law.
Plugging in values:
10 L / 546 K = V / 273 K
V = 5 L
Answer: 4.51 L
Explanation:
Make a claim as to whether analog signals or digital signals are more reliable to transmit information. Use evidence and reasoning to support you claim
ok this is the answer
CRIMINOLOGY
What is a two-track correctional system? Do you think a two-track correctional system would work better in our country? Would this decrease the percentage of offenders reentering the system?
Answer:
Two-track correctional system is a system of consisting two correctional institutions for criminals.Explanation:
The two-track correctional system is a correctional system that consists of two separate correctional institutions for criminals. One institution for juveniles and one for adult criminals.No, two-track correctional system would not work better in our country. There are many cases of serious juvenile crimes in our country. Juveniles who commit serious or atrocious crimes should be dealt strictly in an adult or criminal court without exemption.Yes, this would reduce the percentage of offenders re-entering the system because juveniles incarcerated for serious crimes would be locked up in the prison instead of being acquitted after a short detention.This would stop them from committing similar offences and would reduce potential crimes from ex-convicted juveniles.A two-track correctional system separates non-violent and violent offenders, providing distinct rehabilitation and incarceration methods for each.
A two-track correctional system provides different types of rehabilitation and incarceration for different groups. For non-violent offenders, the focus is on rehabilitation, education, and community service. On the other hand, violent offenders might face more stringent penalties and longer incarcerations.
Effectiveness in the US
Whether such a system would work better in our country is a matter of debate. Currently, the US criminal justice system faces significant challenges, including high recidivism rates, racial and ethnic disparities, and varying treatment based on social class. Implementing a two-track system may help in better addressing the roots of criminal behavior, especially for non-violent offenders who may benefit more from rehabilitative services than from traditional incarceration.
Reducing Recidivism
In theory, a two-track system could reduce the percentage of offenders reentering the system. Providing specific rehabilitation and education programs for non-violent offenders can address underlying issues such as addiction, lack of job skills, or mental health problems. These programs have been shown to lower recidivism rates by preparing individuals for successful reentry into society.
Question 1
Name a star in the main sequence
Antares
Pollux
Epsilon Eridani
Sirius B
Does anyone have the answers to the Unit 5 Earth in the Solar System Unit Test? Tommorow is the last day of school! Need the answers please!
Answer:
Epsilon Eridani
Explanation:
This is in the main sequence as you can see there is an area called "main sequence all you have to do is read all the stars and to see which one is in there and that is The epsilon eridani
Option C is correct. A star in the main sequence will be Epsilon Eridani.
What is Epsilon Eridani ?
Epsilon Eridani is a star in the Eridanus constellation, located south of the celestial equator. This makes it visible from the majority of the Earth's surface.
A star is a heavenly body made up of a brilliant spheroid of plasma held together by gravity. The Sun is the closest star to Earth.
Many additional stars may be seen with the normal eye at night, but due to their great distance from Earth, they appear as stationary points of light in the sky.
A star in the main sequence will be Epsilon Eridani.
Hence, option C is correct.
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The temperature at one of the Viking sites on Mars was found to vary daily
from -90 degree Fahrenheit to -5 degree Kelvins. Convert these
temperatures to Kelvin. *
Answer: T = 305.22 K
Explanation: given that
from -90 degree Fahrenheit to -5
degree Kelvins
Using the formula
(9/5 C) + 32 = F
Let's first convert degree Fahrenheit to degree Celsius
90 = 9C/5 + 32
9C/5 = 90 - 32
9C/5 = 58
9C = 290
C = 290/9
C = 32.22 degree Celsius
Convert degree Celsius to Kelvins
T = 273 + C
T = 273 + 32.22
T = 305.22K
Final answer:
To convert temperature from Fahrenheit to Kelvin, you can use the formula K = (F + 459.67) * 5/9. The temperatures of -90°F and -5°F are equivalent to approximately 183.15 K and 252.04 K, respectively.
Explanation:
To convert temperature from Fahrenheit to Kelvin, you can use the formula:
K = (F + 459.67) * 5/9
Using this formula, let's calculate the Kelvin temperatures for the given Fahrenheit temperatures:
-90°F:
K = (-90 + 459.67) * 5/9 = 183.15 K
-5°F:
K = (-5 + 459.67) * 5/9 = 252.04 K
Therefore, the temperatures of -90°F and -5°F are equivalent to approximately 183.15 K and 252.04 K, respectively.
For an object moving at a constant acceleration, we would expect the position-time graph for this object to have a ______ shape.
A. linear
B. nonlinear
An object moving with constant acceleration will display a nonlinear relationship on a position-time graph due to the consistent change in velocity.
Explanation:For an object moving at a constant acceleration, the position-time graph would have a nonlinear shape. This is due to the fact that constant acceleration implies a constant rate of change in velocity, which in turn means that the object's speed is increasing or decreasing consistently over time. On a position-time graph, this is represented by a curve, rather than a straight line, demonstrating a nonlinear relationship between time and position. For instance, the graph might show a parabolic curve if the object is speeding up, or a hyperbolic curve if it is slowing down.
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Answer:
Force and Motion
Answer:
Acceleration
Explanation:
Any change in speed is change in velocity which is referred to as acceleration.
A student wants to design an investigation to determine if an object has potential energy.
What are some questions she should ask that would help her determine if an object has
potential energy? (Select all that apply)
(2 Points)
Does the object have kinetic energy?
Does the object move when it is released from rest?
Was work done on the object to lift it in the air?
Does a force act on the object?
Is the object part of a system?
Answer:
Explanation: Does the object move when it is released from rest?
Is the object part of a system?
Potential energy can be described as 3 characteristics that a specific object has:
The shape of an object,
The position of an object, and
Its readiness to transform into Kinetic energy.
She should ask the following to help her determine if an object has
potential energy
Does the object move when it is released from rest?
Is the object part of a system?
The student should ask if work was done to lift the object and if a force acts on it, as these help determine the potential energy.
To determine if an object has potential energy, the student should ask the following questions:
Was work done on the object to lift it in the air? - This will help determine if gravitational potential energy is involved.Does a force act on the object? - This questions if there are forces such as gravity or elastic forces that could contribute to potential energy.The questions regarding kinetic energy and movement upon release are less directly related to potential energy, as they address the object's kinetic energy status instead. The consideration of a system may be relevant depending on context, but identifying potential energy primarily focuses on the object's position and forces acting upon it.
Summarize Newton’s First Law