Maggie participated in a race. She ran 100 meters west and then turned back and ran to the starting line to complete the race. Maggie covered this entire distance in 40 seconds. What are her average speed and average velocity?
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However, her displacement was 0, since she ended at the same place she began, therefore, her average velocity is 0 / 40 s = 0.
Answer:
Explanation:
:)
Related Questions
Explain how to determine the wavelength of a wave.
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Which would most likely cause molten rock material to become glassy igneous rock?
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A speaker draws 2 amps of current when it is connected to a 16 volt source. What is the resistance of the speaker?
32 ohms
32 amps
8 amps
8 ohms
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Resistance = 16 / 2
Resistance = 8
Answer : 8 ohms
(it wouldn't be 8 amps because the question is asking for the resistance, and resistance is measured in ohms)
The resistance of the speaker is calculated using Ohm's law and the provided values of 16 volts and 2 amps, resulting in a resistance of 8 ohms. The correct answer is d) 8 ohms.
The resistance of the speaker can be found using Ohm's law, which states that voltage (V) is equal to the current (I) times the resistance (R), or V = IR.
Since we know that the speaker draws 2 amps of current and is connected to a 16-volt source, we can rearrange Ohm's law to solve for resistance (R) as follows: R = V / I. By plugging in the given values we have R = 16 V / 2 A, which equals 8 ohms. Therefore, the resistance of the speaker is 8 ohms.
To be topologically equivalent which deformation is not allowed
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A patient needs surgery to open a clogged heart artery. This patient should look for a surgeon who is an expert in which of the following?
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The answer is B i know this because
superficial anatomy of the circulatory system
functional anatomy of the circulatory system
superficial anatomy of the nervous system
functional anatomy of the nervous system
its not a nervous system part so there goes the last two and superfical means from the outside of the body like skin and hair and the reproductive like testicals and and the ovarys stuff like that thus leaves your answer with the only logical one {functional anatomy of the circularory system}.
i am a titan condemned by Zeus to support the heavens upon his shoulders;son of Iapetus and the nymph clymene; brother of Prometheus and Epimethius. Who am i?
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PLEASE HURRY WILL MARK BRAINLIEST IF CORRECT
What is the nuclear binding energy of an atom that has a mass defect of 1.643 10–28 kg? Use E = mc2. (Remember: The speed of light is approximately 3.00 108 m/s.) 1.83 10–46 J 4.93 10–20 J 1.48 10–11 J 5.48 1045 J
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Answer:
C.
Explanation:
edge
The nuclear binding energy of an atom that has a mass defect of 1.643×10⁻²⁸ kg is 4.93 10⁻²⁰ J . Hence option B is correct.
What is Binding Energy ?The binding energy is the amount of energy necessary to detach a particle from a particle system or to scatter all of the system's particles. Subatomic particles in atomic nuclei, electrons bound to nuclei in atoms, and atoms and ions linked together in crystals are all examples of binding energy.
Nuclear binding energy is the energy necessary to entirely split an atomic nucleus into its component protons and neutrons, or the energy freed by merging individual protons and neutrons into a single nucleus. The hydrogen-2 nucleus, which consists of one proton and one neutron, may be entirely separated by delivering 2.23 million electron volts (MeV) of energy. In contrast, when a neutron and a proton move slowly, When a slowly moving neutron and proton unite to produce a hydrogen-2 nucleus, 2.23 MeV of gamma radiation is released. The total mass of the bound particles is smaller than the sum of the masses of the component particles by an amount equal to the binding energy (as represented in Einstein's mass-energy equation).
In this problem,
The mass defect is Δm = 1.643×10⁻²⁸ kg
Speed of light c = 3×10⁸ m/s
Nuclear binding energy,
B.E. = Δmc²
B.E. = 1.643×10⁻²⁸ kg × 3×10⁸ m/s
B.E. = 4.929×10⁻²⁰ ≅ 4.93 10⁻²⁰ J
Hence option B is correct.
To know more about binding energy :
https://brainly.com/question/30073915
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PLZZZZZZZZZZ HELP QUICK!!!!!!!!!!!!
DONT ANSWER IF YOU DONT KNOW!!!
Calculate the diameter of the fifteenth orbit of the hydrogen atom if the diameter of the innermost orbit is 1.06 A. (Hint: Keep three significant figures in your answer.)
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r = n² · α₀
where:
n = number of orbit = 15
α₀ = Bohr radius (innermost radius) = 0.529 Â
Since d = 2 · r, we can write:
d = n² · d₀
= 15² · 1.06
= 238.5 Â
Hence, the diameter of the fifteenth orbit of the hydrogen atom is 238.5 Â.
Which company has experienced censorship in China?
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For plato, hope this helps
A flock of geese is flying south for the winter. In order to maintain a “V” shape, each goose is flying at the same constant velocity. Which goose will have the most momentum?
A) the goose with the least mass
B) the goose with the most mass
C) the goose that is behind all the others
D) the goose at the front of the "V" leading the way of the other geese
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this is because momentum=mass x acceleration
so a larger mass will give a larger momentum ( acceleration stays constant)
When ultraviolet light with a wavelength of 400 nm falls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is measured to be 1.10 eV .
What is the maximum kinetic energy of the photoelectrons when light of wavelength 285 nm falls on the same surface?
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[tex]hf=\phi + K_{max}[/tex] (1)
where
h is the Planck constant
f is the photon frequency
[tex]\phi[/tex] is the work function
[tex]K_{max}[/tex] is the maximum kinetic energy of the photoelectrons
In the first part of the problem, we have light with wavelength [tex]\lambda=400 nm=400 \cdot 10^{-9} m[/tex], so the photons have frequency
[tex]f= \frac{c}{\lambda}= \frac{3 \cdot 10^8 m/s}{400 \cdot 10^{-9} m}=7.5 \cdot 10^{14}Hz [/tex]
where c is the speed of light; and therefore the energy of the photons is
[tex]E=hf=(6.6 \cdot 10^{-34}Js)(7.5 \cdot 10^{14} Hz)=5.0 \cdot 10^{-19} J[/tex]
Converted into electronvolts ([tex]1 eV= 1.6 \cdot 10^{-19} J[/tex]):
[tex]E=5.0 \cdot 10^{-19} J =3.12 eV[/tex]
The maximum kinetic energy of the photoelectrons in this case is
[tex]K_{max}=1.10 eV[/tex], so we can find the work function of the metal by re-arranging eq. (1):
[tex]\phi = hf-K_{max} = 3.12 eV-1.10 eV=2.02 eV[/tex]
In the second part of the problem, we have light with wavelength [tex]\lambda=285 nm=285 \cdot 10^{-9}m[/tex], which corresponds to a frequency of
[tex]f= \frac{c}{\lambda}= \frac{3 \cdot 10^8 m/s}{285 \cdot 10^{-9}m}=1.05 \cdot 10^{15} Hz [/tex]
And so the photons have energy
[tex]E=hf=(6.6 \cdot 10^{-34} Js)(1.05 \cdot 10^{15}Hz)=6.93 \cdot 10^{-19} J[/tex]
which corresponds to
[tex]E=6.93 \cdot 10^{-19}J = 4.33 eV[/tex]
And if we use again eq.(1), we can now find the new maximum kinetic energy of the photoelectrons:
[tex]K_{max}=hf-\phi=4.33 eV-2.02 eV=2.31 eV[/tex]
Put these components of wind energy production in order from first to last. The wind spins turbines. A wind of at least 15 mph is blowing. The spinning of the turbines is used to create electricity.
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1) A wind of at least 15 mph is blowing.
2) The wind spins turbines.
3) The spinning of the turbines is used to create electricity.
The first condition is that there should be some wind blowing from somewhere. This wind blows and it spins the turbines, and then this rotation of the turbines (mechanical energy) is converted into electricity (electrical energy).
An electrochemical cell is made up of two half cells connected by an external conductor and a salt bridge. the function of the salt bridge is to
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In the electrochemical cell, electron flow from anode to cathode. for the process to continue there must be some mean to keep the charge in balance. the salt bridge maintains the neutrality of solution.the salt bridge does not let the electrons move from the electrolyte. it makes the circuit complete and hence allows the flow of current. some of the examples of salt bridge are KCL, KNO₃ etc.
Electricity caused by the build-up of a charge on an object is called__________
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Zero on the celsius scale is also known as absolute zero true or false
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0°C = 273.15°K
Zero on the Celsius scale is not known as absolute zero. - False
Explanation:Zero on the Celsius scale is not known as absolute zero. Absolute zero is the lowest temperature that can theoretically exist, and it is equal to -273.15 degrees Celsius or -459.67 degrees Fahrenheit. Zero degrees Celsius is simply the freezing point of water. At this point, all molecular motion and energy cease, and no heat remains in matter.
It is a fundamental concept in thermodynamics and the basis for the Kelvin temperature scale. Achieving absolute zero is impossible in practice, but scientists have come close, allowing the study of quantum phenomena and materials at extremely low temperatures, leading to breakthroughs in physics and technology.
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This can best be explained due to A) density. B) friction. C) gravity. Eliminate D) inertia.
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Answer:
D
Explanation:
Put these events of a chain reaction in order from first to last. Many atoms fission. Neutrons are produced. An atom fissions. Neutrons find other atoms.
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1) An atom fission
2) Neutrons are produced
3) Neutrons find other atoms
4) Many atoms fission
This is the description of a fission chain reaction: initially, the reaction starts with the fission of an atom with unstable nucleus. In the fission, neutrons are produced, and they travel through the surrounding medium. Eventually, they meet other atoms and they are captured by their nuclei: the nuclei become unstable and they undergo fission as well.
The inventor of a new machine claims that its actual mechanical advantage is 4. Literature on the machine reports its input distance is 81 meters and its output distance is 27 meters. Find the machine's ideal mechanical advantage, and determine whether the developer's claim could be true.
Answers
The ideal mechanical advantage (IMA) of the machine is 3. The developer's claim of an actual mechanical advantage (AMA) of 4 is higher than the calculated IMA, suggesting that some energy is lost to friction. Therefore, the claim is not true.
Explanation:The ideal mechanical advantage (IMA) of a machine is calculated by dividing the input distance by the output distance. In this case, the input distance is 81 meters and the output distance is 27 meters. Therefore, the IMA of the machine is 81/27 = 3.
The developer's claim of an actual mechanical advantage (AMA) of 4 is higher than the calculated IMA of 3. This suggests that some energy is lost to friction in the machine, reducing its efficiency and resulting in a lower AMA. Therefore, based on the calculated IMA, the developer's claim could not be true.
If Star A and Star B have the same absolute magnitude, but Star A is brighter, what does that tell us?
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In fact, the absolute magnitude gives a measure of the brightness of the star, if all the stars are placed at the same distance from Earth. So, it's a measure of the absolute luminosity of the star, indipendently from its distance from us: since the two stars have same absolute magnitude, it means that if they were at same distance from Earth, they would appear with same luminosity. Instead, we see star A brighter than star B, and the only explanation is that star A is closer to Earth than star B (the closer the star A, the brigther it is)
Jody has a mass of 50 kilograms what is his weight on earth
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Final answer:
Jody's weight on Earth is calculated by multiplying his mass (50 kg) by Earth's standard gravity (9.81 m/s^2), which equals 490.5 newtons.
Explanation:
When calculating the weight of an object on Earth, we need to account for the force of gravity acting upon the object's mass. The standard acceleration due to gravity on Earth is approximately 9.81 meters per second squared (m/s2). To find Jody's weight, we multiply his mass by the acceleration due to gravity:
Weight = Mass times Earth's gravity
Weight = 50 kg times 9.81 m/s2
Weight = 490.5 N (newtons)
Therefore, on Earth, Jody weighs 490.5 newtons.
Certain underwater vehicles are capable of exploring some of the deepest regions of the ocean. consider the density of seawater to be 1025 kg/m3. if such a vehicle were submerged to a depth of 8513 m below the surface, what force would be exerted on the vehicle's observation window (radius = 9.3 cm)?
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[tex]p=p_a + \rho g h[/tex]
where
[tex]p_a =1.013\cdot 10^5 Pa[/tex] is the atmospheric pressure
[tex]\rho=1025 kg/m^3[/tex] is the water density
[tex]g=9.81 m/s^2[/tex] is the gravitational acceleration
[tex]h=8513 m[/tex] is the depth
If we plug the numbers into the formula, we find the pressure exerted on the window of the vehicle:
[tex]p=1.013 \cdot 10^5 Pa + (1025 kg/m^3)(9.81 m/s^2)(8513 m)=8.57 \cdot 10^7 Pa[/tex]
The area of the window is
[tex]A=\pi r^2 = \pi (0.093 m)^2 = 0.027 m^2[/tex]
And so the force exerted on the window is
[tex]F=pA=(8.57 \cdot 10^7 Pa)(0.027 m^2)=2.31 \cdot 10^6 N[/tex]
What gas is released when you burn coal with high amounts of sulfur in it?
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If an astronaut throws an object in space, the object’s speed will _____
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In fact, after the astronaut throws the object, no additional forces will act on it (since the object is in free space). According to Newton's second law:
[tex]\sum F=ma[/tex]
where the first term is the resultant of the forces acting on the body, m is the mass of the object and a its acceleration, we see that if no forces act on the object, then the acceleration is zero. Therefore, the acceleration of the object is zero, and its velocity remains constant.
Give one example when it might be important to know how much gravitational potential energy is stored by an object. Why is it important?
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Answer:
I know this is super late but I have the answer and the screenshot
One example could be when an airplane is flying in the air the higher it is the more gravitational pull there is and if the engines are not working the airplane will come down at a faster speed. It is important to know this because this could cause lots of danger to people and everyone on the plane.
Explanation:
And there you go have a great day!
don't forget to reword this because then that would be plagiarism so goodluck!
Answer:
Bowling ball on a shelf.
Explanation:
Let's say you won a bowling competition and wanted to display the ball on top of a book case. After trying for a while, you finally get it to stay in place without rolling. You may think it'll stay, but that ball still has potential energy, meaning it could fall off and hurt someone.
What is the total resistance of three 6-ohm resistors hooked in parallel
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[tex] \frac{1}{R_{eq}}= \frac{1}{R_1}+ \frac{1}{R_2}+...+ \frac{1}{R_n} [/tex]
In this case, we have three resistors of [tex]6 \Omega[/tex] each, so their equivalent resistance when they are connected in parallel is
[tex] \frac{1}{R_{eq}}= \frac{1}{6 \Omega}+ \frac{1}{6 \Omega}+ \frac{1}{6 \Omega}= \frac{3}{6 \Omega} [/tex]
Which gives
[tex]R_{eq}= \frac{6 \Omega}{3}=2 \Omega [/tex]
If a 100N weight sits in an express elevator what will be the weight when the elevator is traveling at a constant speed
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If the elevator is traveling at constant speed, it means it is at rest. This means anything inside the elevator traveling at constant speed, weights the same as in an elevator not moving -also at rest-.
So the 100N weight's weight doesn't change in an elevator traveling at constant speed.
The weight of the 100N weight will remain the same when the elevator is travelling at a constant speed.
Explanation:When the elevator is travelling at a constant speed, the weight of the 100N weight will remain the same. The weight of an object is the force exerted on it due to gravity, and this force does not change regardless of the elevator's speed or direction. So, the weight of the object will still be 100N.
Determine the ratio of the resistivity of pure water to silver?
3:1
1:3
3 x 1011:1
1:3 x 1011:1
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Pure water, instead, is a very bad conductor, this means its resistivity is very high, of order of [tex]k \Omega \cdot m[/tex] ([tex]10^3 \Omega m[/tex] ). Even without knowing the precise value of the pure water resistivity, we can estimate the ratio between the pure water resistivity and the silver resistivity by comparing the two orders of magnitude:
[tex]r= \frac{10^3 \Omega m}{10^{-8} \Omega m} \sim 10^{11} [/tex]
Therefore, we can say that the correct answer is
[tex]3 \cdot 10^{11} : 1[/tex]
The resistivity is a dependent factor for the ease of allowing electrons to flow. The approximate ratio of the resistivity of pure water to silver is [tex]3 \times 10^{11} :1[/tex].
What is Resistivity?The property of the material that determines the actual resistance offered by the material to the flow of current through a cross-section area, is known as the resistivity of the material.
Pure water is a bad conductor of electricity which means it offers high resistance to the flow of electric current. So, the standard value of the resistivity of pure water is around [tex]10^{3} \;\rm \Omega.m[/tex].
On the other hand, silver is one of the materials which allows higher conduction of electricity through it, hence it has a lower level of resistivity of the order [tex]1.60 \times 10^{-8} \;\rm \Omega.m[/tex]
So, the ratio of resistivity of water to the silver is,
[tex]=\dfrac{10^{3}}{ 1.6 \times 10^{-8}}\\\\\approx 3 \times10^{11} : 1[/tex]
Thus, we can conclude that the approximate ratio of the resistivity of pure water to silver is [tex]3 \times 10^{11} :1[/tex]
Learn more about electrical resistivity here:
https://brainly.com/question/824149
.
A small bug is spinning in a circle. The bug is spinning 12 times a second. What is the angular velocity of the bug?
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[tex]f= \frac{N}{t}= \frac{12 rev}{1 s}=12 s^{-1} = 12 Hz [/tex]
The angular velocity is related to the frequency by the following relationship:
[tex]\omega=2 \pi f[/tex]
And using f=12 Hz, we can find the angular velocity of the bug:
[tex]\omega = 2 \pi (12 Hz)=75.36 rad/s[/tex]
In Linnean taxonomy, the most unique level is _____.
species
genus
kingdom
breed
Answers
wo objects attract each other with a gravitational force of 50 newtons from a given distance. If the distance between the two objects is increased by 5 times, what will be the changed force of attraction between them?
2 newtons
10 newtons
125 newtons
625 newton