What are the assumptions on which the cosmological principle is based?.
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Question 23 of 23
Suppose a current flows through a copper wire. Which two things occur?
O A. The field is parallel to the direction of flow of the current.
B. An electric field forms around the wire.
OC. A magnetic field forms around the wire.
U
D. The field is perpendicular to the direction of flow of the current.
SUBM
Answers
Answer:
The field is parallel to the direction of flow of the current.
Type the correct answer in each box. Round your answers to the nearest hundredth.
An illustration depicts a ball tied with a rope and hanged at a position labeled A. The ball is then pulled to a position labeled B with a height of 0 point 5 meters.
A ball with a mass of 1.5 kilograms is tied to the end of a rope. The ball is pulled to a height of 0.5 meters above the ground and released.
The ball has
joules of potential energy at position B. At position A, all of the energy changes to kinetic energy. The velocity of the ball at position A is
meters/second. Assume there’s no air resistance. Use g = 9.8 m/s2 , PE = m × g × h, and .
Answers
The velocity of the ball at position A is 3.13 m/s.Since all energy is converted to KE.
What is potential energy?The potential energy is due to the virtue of the position and the height. The unit for the potential energy is the joule.
A person has the most potential energy due to her position. when he is sitting on the highest point.
Given data;
Mass,m = .5 kg
Height,H = 0.5 m
Acceleration due to gravity,g = 9.8 m/s²
H is the height
The potential energy is found as;
The potential energy is mainly dependent upon the height of the object.
Potential energy = mgh
The potential energy at point B;
PE = mgh
PE = ( 1.5 kg) ( 9.8 m/s2) (0.5 m)
PE = 7.35 J
Since all energy is converted to KE, the kinetic energy at point B;
KE = 0.5mv^2
KE = PE
7.35 = 0.53(1.5) v^2
V = 3.13 m/s
Hence, the velocity of the ball at position A is 3.13 m/s.
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what is the name of the chart that contain elements?
Answers
Answer:
Element Chart
Explanation:
It is a chart that provides many different elements.
Particles q1 = -20.5 UC, q2 = -9.30 uC, and q3 = -31.6.0 uC are in a line. Particles q, and q2 are separated by 0.980 m and particles q2 and q3 are separated by 0.750 m. What is the net force on particle q2?
Remember: Negative forces (-F) will point Left
Positive forces (+F) will point Right
Answers
The net force on particle q2 can be calculated by finding the net electric force acting on it. The net electric force acting on a particle is the vector sum of the forces exerted by all the other charges on it.
The electric force between two charges q1 and q2 is given by Coulomb's law: F = k * (q1 * q2)/r^2, where k is Coulomb's constant, q1 and q2 are the charges, and r is the distance between them.
The force on particle q2 due to q1 will be:
F1 = k * (q1 * q2) / (0.980m)^2
The force on particle q2 due to q3 will be:
F2 = k * (q2 * q3) / (0.750m)^2
The net force acting on q2 will be the vector sum of F1 and F2.
Keep in mind, q1 and q3 have opposite charges, so they attract each other, while q2 has the same charge as q1, so they repel each other.
Note: The unit of charge is Coulomb (C), but in this problem you are given the charges in microCoulomb (uC) so you need to convert it to Coulomb.
Obtain the theoretical values of nodal voltages for the analysis circuit using Kirchhoff's Laws.
(V1,V2,V3,V4,V12,V23,V24,V34)
Answers
The theoretical values of nodal voltages using Kirchhoff's Laws can be used in the analysis of an electrocardiogram (ECG) to identify potential cardiac abnormalities and diagnose specific heart conditions by providing important information about the electrical activity of the heart.
The ECG measures the electrical activity of the heart by detecting the changes in voltage that occur during each heartbeat. The electrical activity of the heart can be modeled using Kirchhoff's Laws, which describe how current and voltage behave in an electrical circuit. Abnormalities in the electrical activity of the heart can be detected by analyzing the ECG waveform and comparing it to the theoretical values of nodal voltages.
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--The complete Question is, How can the theoretical values of nodal voltages using Kirchhoff's Laws be used in the analysis of an electrocardiogram (ECG) to identify potential cardiac abnormalities and diagnose specific heart conditions? --
Geronimo wants to move an object 12 meters. Calculate the net work done by the object with an applied force of 150 N and a friction force of 37 N.
Answers
Answer:
1476 J
Explanation:
From the question,
Net Work done = Net force× distance moved by net force.
W' = (F-F')×d................... Equation 1
Where W' = Net work done, F = force applied, F' = Frictional force, d = distance moved.
Given: F = 150 N, F' = 37 N, d = 12 m
Substitute these values into equation 1
W' = (150-37)×12
W' = 123×12
W' = 1476 J.
hence the Net Work done by the object is 1476 J
PLS HELP, I DIDN'T KNOW THIS WAS DUE UNTIL I CHECKED-AND IM WORKING ON MY OTHER 5 HOMEWORK ASSIGNMENTS, SO I DONT HAVE TIME TO DO THIS!!! I just need the answers you don't need to go into full detail! I'LL GIVE BRAINLIEST!!!
Answers
Proton has positive charge whereas neutron has no charge.
What are the difference between a proton and neutron?Proton is a type of subatomic particle that has a positive charge whereas Neutron is a type of subatomic particle that has no charge.
An atom that has lost one or more number of electrons is known as anion.
Isotopes is defined as an element that have the same number of protons i.e. atomic number but different numbers of neutrons i.e. mass number.
Electron is located outside the nucleus of an atom.
Fluorine is that atom which has 9 number of protons so its atomic number is 9.
Atomic number is related to the number of particles in the nucleus of an atom because in the nucleus, proton is present which shows the atomic number of an atom.
There are three parts of an atom i.e. proton, electron and neutron.
The size of electron is about 2 × 10⁻¹⁰ cm, The size of proton is about 0.84×10⁻¹³ cm and the size of neutron is about 1.7×10⁻¹⁵ meters
Electron has negative charge, proton has positive charge and neutron has no charge.
Yes, we can tell about the element if we know about the charge and the number of electrons in it because different atoms has particular number of electrons.
The diameter of a nucleus in scientific notation is 1.6 x 10⁻¹⁵.
The mass of hydrogen atom in whole number is 0.00000000000000000000000000167.
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Newtons and Coulombs Laws QC
(Look to the bottom for answers 100% correct)
1. Which law gives the force between two objects that is related to their mass and distance?
A. Newton's second law of motion
B. Kepler's law
C. Newton's law of gravitation
D. Coulomb's law
2. What is the property that allows a positive proton and a negative electron to feel an attraction between each other?
A. Mass
B. Weight
C. Charge
D. Spin
3. In which case would there be an electrostatic force between two objects?
A. Two positively charged objects
B. A negatively charged object and a neutral object
C. A positively charged object and a neutral charged objects
D. Two neutral objects
4. Which statement is correct about electrostatic force?
A. It can have a positive or negative value
B. It is only observed between two electrons
C. It depends on the mass if the charges
D. It is independent of the distance between charges
5. In the simulation, two charges are both set to +4 uC. Then one of the charges is charged to -4 uC. Which statement describes the situation?
A. The electrostatic force is originally repulsive and stays repulsive.
B. The electrostatic force is originally attractive and stays attractive.
C. The electrostatic force changes from attractive to repulsive.
D. The electrostatic force changes from repulsive to attractive.
Answers:
1. C
2. C
3. A
4. A
5. D
BE SURE TO CHECK THE ORDER OF YOUR ANSWER CHOICES BECAUSE THEY CAN CHANGE.
100% is guaranteed
Answers
1c 2c 3a 4a 5d
Explanation:
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Four 29-ohm resistors are connected in series to an ideal 10-volt battery. What is the equivalent resistance of the circuit?
Answers
Answer:
Equivalent resistance of the circuit is 116 ohm.
Explanation:
Finding the equivalent resistance of the circuit. Since, 29 ohm resistors are connected in series, so
→ Equivalent resistance = R_1 + R_2 + R_3 + R_4
→ Equivalent resistance = (29 + 29 + 29 + 29) ohm
→ Equivalent resistance = 116 ohmWhy should you never do an exercise such as the bench press without a spotter?
Answers
Answer:
you could hurt yourself
Explanation:
Answer
You should never do an exercise such as the bench press without a spotter because you could hurt yourself or push your self too much.
Explanation:
1. At a local salon called Curl up and Dye a woman has mysteriously become
ill. Earlier that day she was exposed to a hydrogen peroxide solution
containing 3% hydrogen peroxide. If she received 7mL of solution how
much of the solution was hydrogen peroxide? (2 marks)
Answers
Answer:
30mL FAX
Explanation:
Particles of light are known as A. electrons. B. neutrinos. C. photons. D. bosons.
Answers
Answer:
C. photons
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Explanation:
Answer:
The answer would be c
Explanation:
What is the instantaneous velocity of a freely falling object 14 s after it is released from a position of rest
Answers
The instantaneous velocity of the object is 137.2 m/s along the downward direction.
Instantaneous velocity: The velocity of an object at a particular instant of time is called the instantaneous velocity.
Note: The y-axis is taken along the upward direction so acceleration due to gravity will be negative.
Any object that is falling freely is acted upon by gravity. The first equation of motion gives the relationship between initial velocity, the velocity at time t, time, and acceleration. The equation is,
v=u+at
where v is the velocity at time t, u is the initial velocity, t is the time, and g is the acceleration due to gravity. Since the object starts from rest, its initial velocity is zero.
For the given case, u=0, a=-9.8 m/s^2 and t=14 s. Put the values in the equation to get the instantaneous velocity of the object at t=14 s.
v=0+(-9.8)(14)
v=-137.2 m/s
The negative sign indicates the object is falling downward.
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15o15o and 131i131i are isotopes used in medical imaging. 15o15o is a beta-plus emitter, 131i131i a beta-minus emitter. part a what are the daughter nuclei of the two decays?
Answers
The daughter nucleus of the beta-plus decay of 15O is 15N, while the daughter nucleus of the beta-minus decay of 131I is 131Xe.
Isotopes used in medical imaging undergo radioactive decay, emitting radiation that can be detected and used to create images of the body. 15O and 131I are two such isotopes, and they undergo beta decay.
In beta-plus decay, a proton in the nucleus is converted into a neutron, and a positron and a neutrino are emitted. The resulting nucleus has one less proton and one more neutron than the original nucleus. This process results in the daughter nucleus of 15N for 15O.
In beta-minus decay, a neutron in the nucleus is converted into a proton, and an electron and an antineutrino are emitted. The resulting nucleus has one more proton and one less neutron than the original nucleus. This process results in the daughter nucleus of 131Xe for 131I.
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in the hubble extreme deep field (shown), we see galaxies in many different stages of their lives. in general, which galaxies are seen in the earliest (youngest) stages of their lives?
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In the Hubble Extreme Deep Field, the galaxies seen in the earliest (youngest) stages of their lives are typically the small, faint, and irregularly shaped galaxies.
The Hubble Extreme Deep Field is an image captured by the Hubble Space Telescope that shows a small, seemingly empty patch of sky that contains thousands of galaxies. These galaxies vary greatly in size, shape, and color, and they are located at different distances from us.
Some of these galaxies are very young, while others are much older. However, in general, the galaxies that are seen in the earliest (youngest) stages of their lives tend to be small, faint, and irregularly shaped. This is because they are still in the process of forming and have not yet had the chance to merge with other galaxies or grow in size.
In conclusion, the small, faint, and irregularly shaped galaxies are the ones that are typically seen in the earliest (youngest) stages of their lives in the Hubble Extreme Deep Field. As these galaxies evolve and grow, they may become more structured and take on different shapes and sizes.
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A man running at 5 M/S increases his velocity to 10 M/S in 2 Seconds. What was his acceleration?
Answers
V=vi+at
Where
V is finial velocity
vi is initial velocity
a is acceleration
t is time
10=5+a2
5=2a
a=5/2 or 2.5
The man accelerated at 2.5 meters per second
A stone is pushed from the top of a hill. Halfway to the bottom of the hill, this rolling stoneA) is constantly gaining more energy.B) is using up chemical energy.C) has both potential energy and kinetic energy.D) has kinetic energy only.E) has potential energy only.
Answers
The rolling stone has both potential energy (due to its position on the hill) and kinetic energy (due to its motion as it rolls down the hill). As it moves down the hill, it gains more kinetic energy and its potential energy decreases. This transfer of energy allows the stone to continue rolling until it reaches the bottom of the hill.
When a stone is pushed from the top of a hill and is halfway to the bottom while rolling, the correct answer is C) the stone has both potential energy and kinetic energy. At this point, the stone still has some height above the ground, giving it potential energy, and it is also moving, giving it kinetic energy.
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Thermogenesis has been studied the plants in the genus arum, including skunk cabbage and the corpse flower. In these plants, what hypotheses have been provided to explain the reason behind thermogenesis? select all that apply.
Answers
Thermogenesis has been studied the plants in the genus arum, including skunk cabbage and the corpse flower. In these plants, these hypotheses have been provided to explain the reason behind thermogenesis
protection from frost damageleaf production and photosynthesis.seed germination.What is Thermogenesis?Thermogenesis, which takes place in specialised tissues such brown adipose tissue and skeletal muscle, is described as the disposal of energy through the generation of heat.
All metabolic activities involved in keeping the organism in a live condition require mandatory thermogenesis, which takes place in all organs. It also includes the energy used when food is consumed, digested, and processed (thermic effect of food, or TEF).
Thus, the reason behind thermogenesis are:
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Compare between Convex lens and concave lens
Answers
Answer:
A convex lens or converging lens focuses the light rays to a specific point whereas a concave lens or diverging lens diverges the light rays. When these lenses are combined, they produce sharper images. Most of the eyeglass lenses use combinations of convex and concave lenses.
5. The rate at which an organism uses energy, measured in humans at complete
rest.
Answers
Answer:
n. Abbr. BMR. The rate at which energy is used by an organism at complete rest, measured in humans by the heat given off per unit time, and expressed as the calories released per kilogram of body weight or per square meter of body surface per hour.
Explanation:
How much time is it required for a athlete to lift a 1200 Kg weights up 14m from the ground if he can only produce 9 Kw of power.
Answers
Given,
The mass is m=1200kg
Height is h=14 m
Power is P=9kW
We know
Energy per unit time is power.
Thus,
P=mgh/t
where t is the time.
Thus,
\(\begin{gathered} 9\times10^3=\frac{1200\times9.81\times14}{t} \\ \Rightarrow t=18.312 \end{gathered}\)The time is 18.312 sec.
Sammy is combing his hair. his hair starts to stand on end as energy is transferred to its __________ energy store. what one word completes the sentence?
Answers
Answer:
Kinetic?
Explanation:
Sammy is combing his hair. During combing, his hair starts to stand on end as energy is transferred to its static electricity store. This energy is transferred due to the friction.
What is Static electricity?Static electricity is developed by the imbalance of electric charges within the surface of a material or between the two materials. The charge remains on the surface until it is able to move away by an electric current or electrical discharge of electrons.
When a person combs his/her hair, negative charged particles i.e., electrons leave the hair and transfer to the plastic comb. The comb which is covered in negatively charged particles, then becomes negatively charged, and the hair are left with a positive charge due to loss of electrons.
Static electricity develops when a person runs a plastic comb through his/her hair, then place the comb near small pieces of paper. The paper pieces are attracted to the comb in contact. This attraction is because of the charged comb that induces an opposite charge in the paper, these opposite charges are attracted to each other, and therefore the paper sticks to the comb.
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which force(s) does not act on a stationary body? question 9 options: a. coriolis force b. centripetal force c. friction force d. gravity e. centripetal, friction, and coriolis forces
Answers
According to the question the options are e. centripetal, friction, and coriolis forces.
What is centripetal?Centripetal force is a force that acts on a body moving in a circular path and is directed toward the center of the circle. It is the force that keeps an object in circular motion, such as a satellite in orbit around a planet. The magnitude of the centripetal force depends on the speed of the object and the radius of the circle, and is equal to the product of the mass of the object and the square of its velocity, divided by the radius of the circle.
Centripetal force is a force that acts to keep an object moving in a circular path and is not applicable to an object at rest.
Friction force is the force that opposes the relative motion between two objects that are in contact with each other, and can only act on an object when it is moving.
The Coriolis force is the force generated by the Earth's rotation that causes a curved path for freely moving objects on the Earth's surface, and thus is not applicable to a stationary body.
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Who was Nikola Tesla?
Answers
Answer:
Nikola Tesla was a Serbian-American inventor, electrical engineer, mechanical engineer, and futurist best known for his contributions to the design of the modern alternating current electricity supply system.
The first periodic table of elements Mendeleev created contained only 70 elements. True or false?
Answers
Explanation:
FALSE
The first periodic table of elements Mendeleev created contained 63 elements.
what is the phase of the moon during a solar eclipse?
Answers
Answer:new
Explanation:
Particles q1 = +8.0 uC, q2 = +3.5 uC, and
93 = -2.5 uC are in a line. Particles q1 and q2 are
separated by 0.10 m and particles q2 and q3 are
separated by 0.15 m. What is the net force on
particle q2?
Answers
Answer:
11.1845088571 N
Explanation:
F = k(q1q2)/(d^2)
Concept Development
Practice Page
20-1
Gases
1. A principle difference between a liquid and a gas is that when a liquid is under pressure, its
volume
(increases) (decreases) (doesn't change noticeably)
PHYSICS
and its density
SIGHS
(increases) (decreases) (doesn't change noticeably)
When a gas is under pressure, its volume
(increases) (decreases) (doesn't change noticeably)
and its density
(increases) (decreases) (doesn't change noticeably)
1
2. The sketch shows the launching of a weather balloon
at sea level. Make a sketch of the same weather balloon 1
when it is high in the atmosphere. In words, what is
different about its size and why?
1
1
Answers
Answer:
The answer is below
Explanation:
The main difference between a liquid and a gas is that when a liquid is under pressure, its volume "won't change apparently. The reason is that the distance between the molecules of a liquid is relatively small, and the molecules of a liquid extensively withstand the compressive forces. This is similar to the distance between the molecules of a solid."
What’s the kinetic energy of the object? Use .
Erica is competing in the shot put event at a track meet. She hurls a shot with a mass of 4 kilograms at a speed of 9 meters/second. The shot’s kinetic energy is
joules.
Answers
Answer:
18joules
Explanation:
1/2 of 4=2
2 multiply by 9= 18 joules
Lana wanted to do an investigation to see what kind of birdseed the birds in her neighborhood like best. She purchased three of the same kind of bird feeder and three different kinds of birdseed. Next, she put one kind of birdseed in each of the feeders and placed them near each other outside. Over the next three days, she measured the level of seed in each feeder twice a day. What is the dependent variable in Lana's investigation?
Answers
Answer:
The level of seed in each feeder
Explanation:
The independent variable is the variable which is the suspected cause of an observation, it is the variable that produce the effect observed in the dependent variable. The dependent variable is the variable that is measured
The independent variable is normally the x-value while the dependent variable is the y-value
In the question, Lana wants to find out the kind of birdseed that the neighborhood birds like (to eat) the most by feeding them different types of birdseed and measuring the level of the birdseed in the feeders at regular intervals
the independent variable is the bird seed types which Lana gives to the birds, to determine the type of bird seeds the birds like
The dependent variable is the level of the seed in the feeder which depends on the type of seeds the birds like.