Answer:
14.7 m/s
Explanation:
In this problem we have
u = 3.2 m/s is the initial velocity of the cyclist
a = 2.3 m/s^2 is the acceleration of the cyclist
We want to know the cyclist speed after a time of
t = 5.0 s
So we can use the following equation:
[tex]v=u+at[/tex]
Substituting the numbers, we find
[tex]v=3.2 m/s + (2.3 m/s^2)(5.0 s)=14.7 m/s[/tex]
What's the difference between meteoroids, meteorites, and meteors?
You're talking about a grain of sand or a stone or a rock that's drifting in space, and then the Earth happens to get in the way, so the stone falls down to Earth, and it makes a bright streak of light while it's falling through the atmosphere and burning up from the friction.
-- While it's drifting in space, it's a meteoroid.
-- While it's falling through the atmosphere burning up and making a bright streak of light, it's a meteor.
-- If it doesn't completely burn up and there's some of it left to fall on the ground, then the leftover piece on the ground is a meteorite.
Which change will cause an increase in the electric current produced through electromagnetic induction?
Using more wire loops
Using opposite pole of magnet
Using a weaker magnet
Moving the solenoid slower
Using more wire loops
Answer:
using more wire loops.
Explanation:
When there is a change in magnetic flux linked with a coil changes, an emf is induced in the coil. This phenomenon is called electromagnetic induction.
the amount of induced emf developed is
[tex]e = \frac{d\phi }{dt}[/tex]
If there are N number of turns in the coil, then induced emf is given by
[tex]e = N\frac{d\phi }{dt}[/tex]
Induced current is given by
i [tex]i = \frac{e }{R}[/tex]
So, as number of turns increases, the current produced is also increases.
in the periodic table notation below what information does the number 40.08 tell you
Answer:
The number above the symbol is the atomic mass (or atomic weight). This is the total number of protons and neutrons in an atom. The number below the symbol is the atomic number and this reflects the number of protons in the nucleus of each element's atom. Every element has a unique atomic number.
Explanation:
oxygen is inhaled and is then distibuted throughout the bloodstream is what two body systems?
Respiration and Circulation
Hope that helped
What happens when the temperature of a substance decreases significantly?
A.
Most substances will expand.
B.
Most substances will gain atoms.
C.
Most substances will disappear.
D.
Most substances will contract.
Answer is .... A I think
Answer:
D. Most substances will contract
Explanation:
I took the test; this is the correct answer (:
when jacob bats a baseball with a net force of 4.719N , it accelerates 33 m/s squared, what it the mass of the baseball
Force is given by m*a
thus
4.719/33 = 0.143 kg
that's 143 grams
Please helppppppppp i need it pleaseee
Answer:
Earthquakes
Explanation:
A Transform boundary is a fault that occur when two tectonic plates slide sideways past each other.During the rubbing process, huge portions of rocks on both plates break to create fault lines resulting into earthquakes.The San Andrea Fault is was formed through a similar process.
An object in equilibrium has a net force of
. Static equilibrium describes an object at
having equal and balanced forces acting upon it. Dynamic equilibrium describes an object in
having equal and balanced forces acting upon it.
Answer:
An object in equilibrium has a net force of zero
Static equilibrium describes an object at rest having equal and balanced forces acting upon it.
Dynamic equilibrium describes an object in motion having equal and balanced forces acting upon it.
Explanation:
An object is said to be in equilibrium when a net force of zero is acting on it. When this condition occurs, the object will have zero acceleration, according to Newton's second law:
[tex]F=ma[/tex]
where F is the net force, m the mass of the object, a the acceleration. Since F=0, then a=0. As a result, we have two possible situations:
- If the object was at rest, then it will keep its state of rest. In this case, we talk about static equilibrium.
- If the object was moving, it will keep moving with constant velocity. In this case, we talk about dynamic equilibrium.
An object in equilibrium has a net force of zero. In static equilibrium, the object is at rest, and the forces acting on it are balanced, resulting in no net force.
Dynamic equilibrium describes an object in motion with a constant velocity. In this state, the object is moving at a constant speed in a straight line, and the forces acting on it are balanced. Similar to static equilibrium, the net force acting on the object is zero.
Both static equilibrium and dynamic equilibrium require the forces acting on the object to be balanced, resulting in a net force of zero. The difference lies in whether the object is at rest or moving at a constant velocity.
Therefore, A subject in equilibrium experiences no net force.
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What type of material is found in the asthenosphere?
A. Solid rock
B. A mixture of magma and superheated water
C. A viscoelastic fluid of molten rock
D. An incompressible fluid of molten rock
Answer:
The correct answer is option C.
Explanation:
The layer below the lithosphere , the upper layer of the mantle of the earth with high heat pressure .It is made up of almost solid rocks but also flows not which indicates that it consist of viscoelastic fluid of molten rocks.This is because in some regions there can be presence of molten rocks.
Answer:
C.
Explanation:
which of your muscles push with the most force
Answer:
Wouldn't it be the muscles in your arms or legs since they have to push the most while they have gravity acting upon them?
Explanation:
assume the suns total energy output is 4.0 * 10^26 watts, and 1 watt is 1 joule/second. assume 4.3 * 10^-12 J is released from each p-p chain of reactions. use the energy yield from the proton-proton chain to determine how many proton-proton chain reactions must be happening each second in the solar core
Answer:
[tex]9.3\cdot 10^{37}[/tex]
Explanation:
Power is defined as the energy produced (E) per unit of time (t):
[tex]P= \frac{E}{t}[/tex]
This means that the energy produced in the Sun each second (1 s), given the power [tex]P=4.0\cdot 10^{26}W[/tex], is
[tex]E=Pt=(4.0\cdot 10^{26}W)(1s )=4.0\cdot 10^{26} J[/tex]
Each p-p chain reaction produces an amount of energy of
[tex]E_1 = 4.3\cdot 10^{-12} J[/tex]
in order to get the total number of p-p chain reactions per second, we need to divide the total energy produced per second by the energy produced by each reaction:
[tex]n=\frac{E}{E_1}=\frac{4.0\cdot 10^{26} J}{4.3\cdot 10^{-12} J}=9.3\cdot 10^{37}[/tex]
A________ is a group of organs that work together to perform a common function.
Answer:
organ system
Explanation:
An organ system is a group of organs that work together to perform a common function.
The correct answer is an Organ System
What is the equivalent resistance of a 7ohm resistor and a 93 ohm resistor connected in parallel? PLEASE HELP ASAP
Answer:
≅6.5Ω
Explanation:
In the series resistor circuit, the electric current flows only one path. In the parallel resistor circuit, the current divides and circulates through several paths. These resistances are joined by their two extremes.
The equivalent resistance of a resistor circuit in parallel is equal to the reciprocal of the sum of the inverse of the individual resistors.
For the general case with "n" resistances in parallel the formula is:
[tex]\frac{1}{R_{n} }=\frac{1}{R_{1}}+ \frac{1}{R_{2}} +\frac{1}{R_{3}}+....\frac{1}{R_{n} }[/tex]
Solving for R1 = 7ohm and R2 = 93ohm
[tex]\frac{1}{R_{n} }=\frac{1}{7ohm}+ \frac{1}{93ohm}}[/tex]
[tex]\frac{1}{R_{n} }=0.143ohm+0.011ohm\\\frac{1}{R_{n} }=0.154ohm\\R_{n}=\frac{1}{0.154} ohm\\R_{n}=6.503ohm[/tex]
.
It’s Halloween and time for the costume dance and you just can’t wait. You think you have everything planned perfectly – and are dressed like GREASE! On your way to the dance though there is some slow driving person in front of you, so you slam on the gas going from 30. mi/hr to 60. mi/hr. Luckily your date brought a stop watch and told you the whole thing took place in 10.5s. What is your acceleration and how far did you date go?
Answer:
1.3 m/s², 210 m
Explanation:
Average acceleration is change in velocity over change in time.
First, convert to SI units.
30. mph ≈ 13.4 m/s
60. mph ≈ 26.8 m/s
a = Δv / Δt
a = (26.8 m/s - 13.4 m/s) / 10.5 s
a = 1.28 m/s²
Rounded to 2 sig-figs, your acceleration is 1.3 m/s².
The distance traveled is:
x = x₀ + ½ (v + v₀)t
x = (0 m) + ½ (26.8 m/s + 13.4 m/s) (10.5 s)
x = 211 m
Rounded to 2 sig-figs, you and your date traveled 210 m.
Final answer:
The acceleration of the car was approximately 1.27728 m/s², and the distance traveled during the acceleration was approximately 211.69242 meters.
Explanation:
To calculate the acceleration, we can use the formula:
a = (Vf - Vi) / t
Where Vf is the final velocity, Vi is the initial velocity, and t is the time. Plugging in the values given, we get:
a = (60 mi/hr - 30 mi/hr) / 10.5s
To make the units consistent, we should convert the velocities from miles per hour to meters per second. Since 1 mi/hr is approximately equal to 0.44704 m/s, after conversion we get:
a = (26.8224 m/s - 13.4112 m/s) / 10.5s = 1.27728 m/s²
To find the distance traveled during acceleration, we use the formula:
d = Vi*t + 0.5*a*t²
Substituting the known values, we find:
d = 13.4112 m/s * 10.5s + 0.5 * 1.27728 m/s² * (10.5s)² = 140.8176 m + 70.87482 m
The total distance traveled by your date during the acceleration is approximately 211.69242 meters.
If the action force of a bat striking a ball accelerates the ball in one direction, the
reaction force accelerates the bat in the ____________________ direction.
Answer:
Opposite
Explanation:
if you put 20 lbs of force into the swing then 20 lsb of force is put into the ball and the bat so think of it as two balls being thrown at each other at the same speed they will hit each other and stop because the force cancels out
i hope this helps and sorry if im wrong
If a bat hits a ball and sends it in one direction, the bat will be accelerated in the opposite direction. This is based on Newton's third law of motion which states that for every action, there is an equal and opposite reaction.
Explanation:The laws of physics state that for every action, there is an equal and opposite reaction. This is known as Newton's third law. If the action force of a bat striking a ball accelerates the ball in one direction, the reaction force accelerates the bat in the opposite direction. This means that if the bat propels the ball to the left, the bat would be driven to the right and vice versa. This is why a players' hand can feel a sting or shock when hitting a baseball, which is the bat being accelerated in the opposite direction by the reaction force.
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a platinum bar measures 5.0 cm long, 4.0 cm wide and 1.5 cm thick. it has a mass of 700.0 grams
Answer:
23.3 g/cm3
Explanation:
First of all, this should be in the math section. I just so happen to also be good at math. Cheers!
We have that for the Question "a platinum bar measures 5.0 cm long, 4.0 cm wide and 1.5 cm thick. it has a mass of 700.0 grams" it can be said that The density of the platinum bar is
[tex]\rho=23.33g/cm^3[/tex]
From the question we are told
a platinum bar measures 5.0 cm long, 4.0 cm wide and 1.5 cm thick. it has a mass of 700.0 grams
Generally the equation for the density is mathematically given as
[tex]\rho=\frac{m}{V}\\\\Therefore\\\\\rho=\frac{m}{V}\\\\\rho=\frac{700}{5*4*1.5}\\\\[/tex]
[tex]\rho=23.33g/cm^3[/tex]
Therefore
The density of the platinum bar is
[tex]\rho=23.33g/cm^3[/tex]
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What is the term for a mirror with a flat surface?
A. silver mirror
B. plane mirror
C. glass mirror
D. reflecting mirror
I think flat surface mirrors are also just called plane mirrors. One way to tell even if you don't know that this is the answer is by knowing that flat mirrors have "planar reflective surfaces"
What structure is used to focus light in a reflecting telescope?
Convex lens
Plane mirror
Concave mirror
Answer:
Concave mirror
Explanation:
Reflecting telescopes is a type of telescope that uses mirrors instead of lens. This is because mirrors are lighter and thus are easier to make perfectly smooth as compared to lenses.Reflecting telescopes use concave mirrors for the purposes of bringing light gathered to a certain focus. Concave mirror in reflecting telescopes collects parallel rays from the object and forms an image at the focal point.
Answer:
CONCAVE
Explanation:did it on edge 2021
Drug abuse is best defined as __________.
A.
the consumption of legal drugs
B.
the consumption of illegal drugs
C.
the nonmedical or improper use of a drug that can interfere with a healthy life
D.
using drugs on an occasional basis until mood is altered
THE ANSWER IS C
Answer:
Drug abuse is best defined as the nonmedical or improper use of a drug that can interfere with a healthy life.
For example, a person that is addicted to cocaine will use it everyday, and will develope agressive behavior, anxiety, sleep disorder, paranoia etc.
This person could get addicted at the point of comiting a robbery, killing and much more.
Drug abuse is best defined as the nonmedical or improper use of a drug that can interfere with a healthy life.
Hence, the correct option is C.
Drug abuse is best defined as the nonmedical or improper use of a drug that can interfere with a person's physical, psychological, and social well-being.
It involves using drugs for purposes other than their intended medical use or using drugs in excessive amounts or frequency, which can lead to addiction, health problems, and negative consequences in various aspects of life.
Drug abuse can involve both legal and illegal drugs and is a significant public health concern worldwide.
Therefore, Drug abuse is best defined as the nonmedical or improper use of a drug that can interfere with a healthy life.
Hence, the correct option is C.
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A student runs a 400m race around the school track in 65 seconds. At the start of the race, the student accelerates to a speed of 6.0m/s during the first 2.2 seconds. Calculate the magnitude of their acceleration, assuming it is constant.
Answer:
2.7 m/s²
Explanation:
Average acceleration is change in velocity over change in time. Assuming the acceleration is constant, we can say it is equal to the average:
a = Δv / Δt
a = (6.0 m/s - 0 m/s) / 2.2 s
a ≈ 2.7 m/s²
A student places a magnet into a box of paper clips. When she lifts the magnet, some of the paper clips are pulled out of the box. However, some of the clips remain in the box. Why can’t the student pull all of the paper clips out of the box?
Answer:
The magnetic force of the magnet can only be used so much
If the magnet is covered with paper clips it can not pick up more
Explanation:
Final answer:
The student cannot lift all paper clips because the magnet's force has limited range and intervening materials can reduce its effectiveness. Some paper clips may also stick together after being magnetized, exceeding the magnet's lifting capacity.
Explanation:
The student cannot pull all the paper clips out of the box because the magnetic force of the magnet has a limited range, and not all paper clips are within that range. Additionally, if other materials are placed between the magnet and the paper clips, like paper or wood, they may reduce the magnetic attraction. Moreover, the magnetization of the paper clips through contact with a magnet can cause some of them to stick together, thereby increasing the effective weight beyond the lifting capacity of the magnet used by the student.
Experiencing magnetic forces like attraction or repulsion among paper clips demonstrates the behavior of bar magnets which, based on their ends being north or south poles, can either attract or repel each other. This principle is also evident in other experiments where materials are used to see how they influence magnetic forces, such as using a metal ruler to attract paper clips after rubbing it with a magnet, indicating induced magnetization.
What is true about resistance? Check all that apply. A. It is the excess accumulation of electric charge B. It is measured in ohms. C. It is the opposition of movement of electric charge. D. It is measured in amps. E. It is related to voltage and current by Ohm's Law.
Answer:
B, C and E
Explanation:
The unit of resistance in the international system is the Ohm, the equation that describes the resistance is:
[tex]R=p\frac{l}{S} \\[/tex]
Where (l) is for lenght of the wire, (S) is the area and (p) its the constant associated to the conductor.
It's related by the Ohm's Law:
[tex]R=\frac{V}{I}[/tex]
Resistance, measured in ohms, refers to the opposition of the flow of electric charge in a conductor. It is not the excess accumulation of electric charge, nor is it measured in amps. Resistance is related to voltage and current as per Ohm's Law.
Explanation:Resistance, in the context of Physics, is the opposition to the flow of electric charge through a conductor. It can be thought of as electrical friction that resists the flow of charge, akin to how physical obstructions can slow down the flow of water. Resistance is typically measured in units called ohms and is symbolized by the Greek letter Omega (Ω). It's not the excess accumulation of electric charge, as stated in option A.
Ohm's Law, named after the German physicist Georg Simon Ohm, relates resistance to voltage and current. It states that the current passing through a conductor between two points is directly proportional to the voltage across the two points when the temperature remains constant. Mathematically, it is expressed as V = IR, where V is the voltage in volts, I is the current in amps, and R is the resistance in ohms.
Therefore, the statements B, C, and E are true about resistance. It is not measured in amps (option D); current is measured in amps. The resistance of a component can be determined using an ohmmeter, and the equivalent resistance of a circuit depends on how resistors are connected within the circuit (in series, parallel, or a combination of both).
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a cell phone company relies on which kind of waves in order to provide service for its customers
Answer:
Microwaves
Explanation:
Microwaves are electromagnetic waves with wavelengths longer than those of terahertz (THz) wavelengths, but relatively short for radio waves. this is why a cell company would use microwaves to provide service
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In an experiment, Seth was given a substance known as ammonium carbonate, (NH4)2CO3. Seth connected a bunsen burner to the gas valve using a gas hose. He turned on the gas valve and lit the bunsen burner. Using a test tube, Seth heated a piece of ammonium carbonate. Seth noticed the following:
- Condensation appeared on the sides at the top of the test tube.
- An ammonia smell was coming from the test tube.
Seth continued to light a wooden splint and stick it down the test tube and it immediately was extinguished.
Throughout this experiment, how many signs of chemical changes were observed and actual chemical changes took place?
A)4B)5C)6D)7
Answer:
its 5
Explanation:
Chemical change shows the change in the chemical composition during an experiment. Seth observed 5 signs of chemical changes during the experiment.
what is a chemical change?when a substance reacts chemically with another substance in order to form a new substance causes decomposition of that substance into two or more substances. The following reaction only takes place due to certain changes during the reaction known as chemical change.
Seth observes signs as follows
The burner is lighting.
The condensation appeared on the top of the test tube.
A smell was coming from the tube.
There is a light a wooden splint occurs.
when he lit the wooden splint it was immediately extinguished.
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When a star dies, which of these celestial objects is it most likely to help create? A. a planet B. a star C. a moon D. a meteor E. a comet
Answer:
B
Explanation:
When a star dies, it is most likely to help create a star, therefore the correct answer is option B
What is Chandrasekhar's limit?
Chandrasekhar's limit is a type of maximum limited value that is used to define the maximum mass of a white dwarf star. The generally internationally considered value of the Chandrasekhar limit is about 1.44 times the mass of the sun which is approximately 2.765×10³⁰ kg.
In other words, one can say that the Chandrasekhar limit is the maximum value that can attain 1.44 times the solar mass.
A high-mass star expands and transforms into a red supergiant when it runs out of gas to burn. The supergiant stars, known as supernovae, obliterate themselves in a tremendous explosion while the majority of stars slowly fade away. Massive star deaths can result in the formation of new stars.
Thus, The correct response is option B because when a star dies, it most likely contributes to the creation of another star.
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choose the ray diagram that correctly locates the image formed by a convex lens. the object is located between the focal point and the 2F position
Answer: The first ray diagram
Explanation:
A convex lens is thicker in the center than at its edges and concentrates (converges) at a point the rays of light that pass through it.
Now, the lens shown in the image is a biconvex lens, which is still convergent.
For the specific case in which the object is positioned between the focus F and point 2F, the image produced will be real and inverted.
With real image means that it can be projected on a screen if it is placed just where the rays converge after passing through the lens.
Then, the option that is closest to this fact is the first figure.
Answer:
A the first one
Which of the following is a speed value. 95m, 125m/s, -35.2m/s
Answer:
125 m/s
Explanation:
95 is just a measurement of length, depth, or width
You can't go -35.2 m/s
For this case we have by definition, that the speed is a scalar quantity that determines the relation of the distance traveled by a body or object and the time it needs to cover said distance.
So:
95 meters, represents a distance.[tex]125 \frac {m} {s}[/tex], is a scalar quantity (Speed)[tex]-35.2 \frac {m} {s}[/tex], Represents a velocityANswer:
Option B
What is the voltage across a resistor
oltage across a resistor of 3 ohms that carries a current of 15 amps? NEED TO KNOW ASAP PLEASE HELPPPPPPP
Answer:
45 V
Explanation:
The voltage across the resistor can be found by using Ohm's law:
[tex]V=RI[/tex]
where
R is the resistance
I is the current
In this circuit,
[tex]R=3 \Omega[/tex]
[tex]I=15 A[/tex]
Therefore, the voltage across the resistor is
[tex]V=(3\Omega )(15 A)=45 V[/tex]
Voltage = (current) x (resistance) <== memorize this formula
Voltage = (15 Amperes) x (3 ohms)
Voltage = 45 volts
Bread dough rises because yeast produces
a. carbon dioxide
b. sugar
c. oxygen
d. water
Answer: Yeast produces carbon dioxide
Explanation: Yeasts feed on the sugars in flour and releases the carbon dioxide that makes bread rise.
Answer:
Carbon Dioxide
Explanation:
Bread dough rises because yeast produces Carbon Dioxide.
Carbon Dioxide causes the yeast to rise in the dough because Carbon Dioxide fills p any space. The dough rises because the Carbon Dioxide fills the extra space in the dough, causing the dough to get big and fluffy, aka rise.
Mordancy.
5. Which type of energy resource is hamessed beneath the Earth's surface? A. biomass B.solar C.hydroelectric D.geothermal
It's called geothermal energy, and is present due to the incredible amount of heat present in Earth's interior from radioactive decay, friction, and residual heat from Earth's formation.