Answer:
101.81818 MPH
Explanation:
What is the correct definition of a 'field vector'?
a) A measurement that must have both a number and a unit
b) A measurement that can only be measured using scientific digits
c)A measurement that has both a magnitude and direction represented with an arrow
d)A measurement that is drawn in as it cannot be seen visually
i think it is c but can someone help me with this?
Answer: Yes the answer is C
Explanation: Look a pictures of field vectors, they are represented with the arrows.
A cylindrical pulley with a mass of 4.4 kg, radius of 0.816 m and moment of inertia 1 2 M r2 is used to lower a bucket with a mass of 3.1 kg into a well. The bucket starts from rest and falls for 2.9 s. r M m What is the linear acceleration of the falling bucket
Answer:
5.85 m/s²
Explanation:
Mass of pulley (M) = 6.8 kg, mass of bucket (m) = 1.5 kg, radius of pulley (r) = 0.816 m, acceleration due to gravity (g) = 10 m/s².
Let the tension exerted on the pulley be T and the angular acceleration be α,
The angular acceleration (α) = a / r; where a is the linear acceleration.
mg - T = ma
T = m(g - a)
Also, for the disk:
Tr = Iα
I = moment of inertia = 0.5Mr²
m(g - a)r = 0.5Mr²(a/r)
m(g - a)r = 0.5Mra
2m(g - a) = Ma
2mg - 2ma = Ma
Ma + 2ma = 2mg
a(M + 2m) = 2mg
a = 2mg / (M + 2m)
Substituting:
a = 2(3.1 kg)(10 m/s²) / (4.4 + 2(3.1))
a = 5.85 m/s²
How can an electromagnet be made stronger?
A.Add more coils of wire.
B.Add an iron core.
C.All the above.
D.Increase the voltage.
All four choices are correct responses. (A), (B), (C), (D)
Hail stones mostly melts unto rain during the fall from the sky why?
Answer:
(2).........
Explanation:
(2)..........
A student determines a value for a force using the formula F = k I l.
k is a constant with units of N A-1 m-1
I is current measured in mA
l is length measured in mm
The student uses the numbers directly from each measurement in their calculation.
What will be the units of the force from that calculation?
1 Newton force is equal to the 10⁻⁵ dynes. The unit of force will be dyne and the value of force will be 0.1 dynes.
What is force?
Force is defined as the push or pull applied to the body. Sometimes it is used to change the shape, size, and direction of the body. Force is defined as the product of mass and acceleration.
Its SI unit is Newton, MKS unit is kgm/s² and CGS unit is dyne.
The given formulae are;
F = k I l
k is a constant with unit= N A-1 m-1
I is currently measured in mA = 10⁻³A
l is the length measured in mm= 10⁻³ m
F = k I l
F= N A-1 m-1× 10⁻³A×10⁻³ m
F= 10⁻⁶ N ( 1N = 10⁻⁵ dyne)
F= 0.1 dyne
Hence the unit of force will be dyne and the value of force will be 0.1 dynes.
To learn more about the force refer to the link;
https://brainly.com/question/26115859
How do the interactions between the two atoms change when the atoms get closer than the balanced point?
Answer:
The strong attraction of each shared electron to both nuclei stabilizes the system, and the potential energy decreases as the bond distance decreases. If the atoms continue to approach each other, the positive charges in the two nuclei begin to repel each other, and the potential energy increases.
The interaction that lies between two atoms change should be considered as the stabilizes the system.
Reason for two atoms change:Since there is a strong attraction for every shared electron for both nuclei stabilizes the system and potential energy should be reduced due to this, the bond distance should be reduced.
In the case when the atom should continue to approach each other so here the positive charges in the two nuclei started to repel each other.
Learn more about atoms here: https://brainly.com/question/17920806
what happens to the strength of an electromagnet when the number of coils in the solenoid in increased
a. it depends on what metal makes up the solenoid
b. it increases
c. it remains the same
d. it deceases
Answer:
B. It increases
Explanation:
Im sure
A heat engine produces 80kw with an efficiency of 40 percent. Determine the heat transfer rate to and from the wrecking fluid
Answer:
given
Explanation:
power input is 80 kw and power output is asking also efficiency is given so
efficiency= power output / power input
use to get heat transfer rate which is power
You are traveling on a plane trip from Washington, D.C. to Cleveland, Ohio and the plane uses 1,260 MJ/passenger trip. If you made the trip by car it would take 18 gallons/passenger trip. There are 142 MJ in a gallon of kerosene, a type of jet fuel. How many gallons of kerosene does it take to make the trip by plane?
Answer:
8.87 gallons of kerosene
Explanation:
Step 1: Given and required data
Energy to travel by plane per passenger trip: 1,260 MJ/passenger tripEnergy per gallon of kerosene: 142 MJ/galStep 2: Calculate how many gallons of kerosene it takes to make the trip by plane
We can calculate the amount of kerosene required by combining the factor provided in Step 1.
1 gal/142 MJ × 1,260 MJ/passenger trip = 8.87 gal/passenger trip
8.87 gallons of kerosene are required to make the trip by plane.
Part A Every force has one and only one 3rd law pair force. Every force has one and only one 3rd law pair force. true false Request Answer Part B The two forces in each pair act in opposite directions. The two forces in each pair act in opposite directions. true false Request Answer Part C The two forces in each pair can either both act on the same body or they can act on different bodies. The two forces in each pair can either both act on the same body or they can act on different bodies. true false
Answer:
Explanation:
Part A
Every force has one and only pair force , according to 3 rd law
It is true , the pair force has equal magnitude .
Part B
The two forces in each pair act in opposite directions.
It is true .
The pair forces are equal and act in opposite direction .
Part C
The two forces in each pair can either both act on the same body or they can act on different bodies.
It is false .
The two forces in each pair can not act on same body . They act on different bodies , bodies which are undergoing mutual interaction.
A squirrel pulls a 8.7 kg bag of acorns along the ground with a constant force of 80 N. If the force of friction opposing this sliding is 32 N. what will be the acceleration of the bag of acorns?
Answer:
[tex]a=5.51\ m/s^2[/tex]
Explanation:
Given that,
The mass of a bag of acorns, m = 8.5 kg
The force acting on the bag = 80 N
The force of friction = 32 N
We need to find the acceleration of the bag of acorns.
Net force acting on it is = 80 N - 32 N
= 48 N
Let a be the acceleration of the bag of acorns. So,
F = ma
[tex]a=\dfrac{F}{m}\\\\a=\dfrac{48}{8.7}\\\\a=5.51\ m/s^2[/tex]
So, the acceleration of the bag of acorns is [tex]5.51\ m/s^2[/tex].
plz solve 90-(3+9)∙7
Answer:
The answer is 6.
90 - (3+9) • 7
90 - (12) • 7
90 - 12 • 7
90 - 84
6
Does solar/light energy explain why/how thing keep going?
O Yes, solar/light energy can convert into other kinds of energy that makes things go, such as TE, ELE, and CE
O No, solar/light energy canonly power solar panels, so it cannot serve as a source of why things go
.
Answer:
In 1954 modern solar cells were invented at Bell Labs with the intent of powering satellites. For many years solar remained expensive but today prices have come down and solar electricity is everywhere. Our satellites and the Mars rover are solar powered, as are homes, toys, outdoor lighting and solar battery packs to charge our electronic devices. Importantly solar electricity is bringing light to the one billion people around the world who live without power. Often these solar lights are replacing kerosene or candles as light sources in the home. Let’s look at some frequently asked questions about solar lights and how they are changing the world.
What are solar lights made of? Solar lights are made up of four main components: the solar photovoltaic (PV) panel, battery, control electronics and the light fixture. When the sun is out, a solar panel takes the light from the sun and produces electrical energy. The energy can then be used immediately or stored in a battery. The goal of most solar lights is to provide power at night, so they will definitely contain a battery, or be capable of attaching to a battery. The battery itself may not need to have a large capacity, due to the availability of solar energy, but it should be long lasting to account for difficulties replacing batteries in many places across the globe.
The advent of the Light Emitting Diode (LED) for the light fixture has drastically reduced the capacity needs of both the solar panels and the batteries. They use significantly less energy than other types of lighting, so the solar panel and battery can be smaller (more transportable and less expensive). The control electronics are required to move the energy around the system, keep the system safe, and potentially switch on or off your light, depending on the level of light it’s exposed to. Solar lights made for outdoor lighting will often turn on automatically when it gets dark outside. Some solar lights made for reading will turn off during daylight hours to preserve the solar charge, but won’t turn on until they are powered on by a user.
How is solar energy produced? Let’s look a little more deeply into the science behind solar electricity. Solar energy is produced due to the photovoltaic effect. A photovoltaic panel (also known as solar cell) converts sunlight into electrical energy. The solar cell is made up of multiple layers of crystalline silicon and chemicals that create layers of negatively-charged electrons and positively-charged spaces. When light passes through the solar cell, it excites the negatively-charged electrons and pushes them into the positively-charged spaces. Those spaces then transfer the electron stream as direct current of electricity through the wires in the solar cell for use or to a battery where the power is stored until it is needed.
Explanation:
why is a simple cell importable
A dog travels 3m East and then 4m West, what is his displacement?
Answer:
his displacement is 5m
Explanation:
A is the stage at which a man starts walking. He's walking 4 m north, i.e. AB, then going 3 m east, i.e. BC. The displacement is the connecting straight line between the original and the final position. The displacement is thus the AC hypotenuse of the right-angle triangle. By applying the theorem of hypotenuse, we get
⇒displacement=16+9−−−−−√=25−−√=5m
explain the principle of N-type semiconductor
Answer:
Explanation:
An N-type semiconductor is a type of material used in electronics. It is made by adding an impurity to a pure semiconductor such as silicon or germanium. The impurities used may be phosphorus, arsenic, antimony, bismuth or some other chemical element. They are called donor impurities
A ball is thrown up into the air. The time that it takes to go up equals
Answer:
The time it takes the ball to rise equals the time it takes to fall.
Explanation:
because what goes up at some point must come down
CAN SOMEONE PLEASE HELPPPPPP
Answer:
0.54
Explanation:
2.7÷5 = 0.54
Hope this helps!
A glass optical fiber is used to transport a light ray across a long distance. The fiber has an index of refraction of 1.520 and is submerged in ethyl alcohol, which has an index of refraction of 1.361. What is the critical angle (in degrees) for the light ray to remain inside the fiber
Answer:
θ = 63.5º
Explanation:
When a ray of light strikes the separation surface between two transparent media with different index of refraction, part of the light remains in the first medium, and part transmits to the second one , according to the Snell's Law, as follows:[tex]sin \theta_{i}* n_{i} = sin \theta_{r}* n_{r} (1)[/tex]
where θi = angle of incidence (with the normal to the surface)
θr = angle of refraction (with the normal to the surface)
ni = index of refraction of denser medium = 1.520
nr = index of refraction of less dense medium = 1.361
When the angle of refraction is equal to a right angle, this means that the light is parallel to the surface, and remains within the first medium completely.The angle of incidence for this particular angle, is called the limit angle, and is the principle of operation of fiber optics, which are composed by a strand of glass, surrounded with another material, which index of refraction is lower than the fiber's, preventing light to go outside the fiber.In our case, replacing ni, nr, and θr = 90º in (1), we get:[tex]sin \theta_{i}* 1.520 = 1* 1.361 (2)[/tex]Solving for sin θ₁ :[tex]sin \theta_{i} = \frac{1.361}{1.520} = 0.895 (3)[/tex]
⇒ θi = sin⁻¹ (0.895) = 63.5º
How does lifting electromagnet working
Explanation:
Large electrical shifting magnets have concentrated retaining strength to lift dense, ferric objects and a deep-reaching magnetization. An immensely useful materials management technique is these electromagnetic rises.
The cause of weather systems on earth is ___________?
A. Conduction
B. Convection
C. Radiation
Answer:
Convection and Radiation
Explanation:
Because the sun heats up the earth which cause the warm temperature and you probably know convection heat up the coefficient and radiation transfer heat electromagnetic or heat LOL
The cause of weather systems on earth is CONVECTION.
Convection can be defined as the transfer of heat from one site to another caused by the movement of fluid.This transfer of heat can be calculated as
Q=h A\Delta Twhere Q is equal to the rate of transference of heat; h is equal to convection heat-transfer coefficient; A to the surface area that is exposed and Delta T is equal to the temperature difference.Heat energy is always transferred from hot sites to cooler sites.This transfer of heat (convection) only occurs in liquids and gases.In conclusion, the cause of weather systems on earth is CONVECTION.
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An 8 N force accelerates an object at a rate of 2.5 m/s what Is the mass of the object
Answer:
16N
Explanation:
Answer: 3.2 kilograms
=================================================
Work Shown:
F = 8 newtons = force appliedm = unknown mass in kilogramsa = 2.5 m/s^2 = accelerationApply Newton's Second Law of Motion
F = m*a
8 = m*2.5
2.5m = 8
m = 8/2.5
m = 3.2
The mass is 3.2 kilograms
a charge Q exerts a 2.4 N force on another charge q.If the distance between the charges is doubled,what is the magnitude of the force exerted on Q by q ?
a kids toy has a mass of 2.6kg. what is the weight of the object on earth
Answer:
25.48
Explanation:
the earth's gravitational pull is 9.8 m/s. So to find the answer, multiply 2.6 x 9.8
HELP PLZ
If an object has a mass of 1.5 KG what is the force of gravity on it?
what is the combination of two or more simple machine
Answer:
compound machineExplanation:
A compound machine is a combination of two or more simple machines.
BRAINLIEST? plz
REALICE UN ANALISIS DEL TEMA, INDICANDO LAS IDEAS PRINCIPALES
Answer:
De cual Tema??? jajaja no se que necesitas
Answer:
El análisis temático es un método de análisis de datos cualitativos. Por lo general, se aplica a un conjunto de textos, como las transcripciones de entrevistas. El investigador examina de cerca los datos para identificar temas comunes: temas, ideas y patrones de significado que surgen repetidamente.
Explanation:
A hamster eats a carrot before using its hamster wheel. The hamster wheel is connected to a generator which powers a light bulb.
Mechanical → Chemical → Radiant → Electrical
Chemical → Mechanical → Electrical → Radiant
Chemical → Mechanical → Thermal → Electrical
Mechanical → Electrical → Thermal → Radiant
Answer: Chemical → Mechanical → Electrical → Radiant
Explanation:
First, the Hamster eats the carrot, then the hamster is getting chemical energy.
Now the hamster starts using his wheel, then he "transforms" the chemical energy into mechanical energy.
Now the mechanical energy is connected to a generator, this means that the mechanical energy (the rotation of the wheel) is being converted into electrical energy.
And we know that there is a light bulb powered by this electrical energy, then we have electrical energy being transformed into radiant energy.
Then the correct option is:
Chemical → Mechanical → Electrical → Radiant
A system is best defined as?
Answer:
a group of organs working together to perform a function.
Explanation:
The blocks are forced together, compressing a spring between them by a distance x; (the force constant of the spring is k) then the system is released from rest on a level, frictionless surface. The spring, which has negligible mass, is not fastened to either block and drops to the surface after it has expanded. What is the speed that block A acquired, vA
Answer:
v =[tex]\sqrt{\frac{k}{m} }[/tex] x
Explanation:
For this exercise let's use the important topic of conservation of energy
starting point. Spring compression point
Em₀ = K_e = ½ k x²
final point. When the spring is not compressed
Em_f = K = ½ m v²
as they indicate that there is no friction, the energy is conserved
Em₀ = Em_f
½ k x² = ½ m v²
v =[tex]\sqrt{\frac{k}{m} }[/tex] x