Answer:
800 N/C to the right
Explanation:
The relationship between electric force, electric field and charge is
[tex]E=\frac{F}{q}[/tex]
where
E is the electric field
F is the force acting on the charge
q is the charge
In this problem, we have
[tex]F = 0.040 N[/tex] is the force
[tex]q=+50 \mu C=+50 \cdot 10^{-6}C[/tex] is the charge
Substituting into the formula, we find the electric field magnitude
[tex]E=\frac{0.040 N}{+50 \cdot 10^{-6}C}=800 N/C[/tex]
Concerning the direction:
- The electric field and the force have same directions if the charge is positive
- The electric field and the force have opposite directions if the charge is negative
Here the charge is positive, so the electric field has same direction as the force: therefore, to the right.
The impulse given to a ball with mass of 4 kg is 28 N s. If the ball were already moving at 3 m/s what would the final velocity be? (Remember that v = Vfinal - Vinitial )
vf = 10 m/s. A ball with mass of 4kg and a impulse given of 28N.s with a intial velocity of 3m/s would have a final velocity of 10 m/s.
The key to solve this problem is using the equation I = F.Δt = m.Δv, Δv = vf - vi.
The impulse given to the ball with mass 4Kg is 28 N.s. If the ball were already moving at 3 m/s, to calculate its final velocity:
I = m(vf - vi) -------> I = m.vf - m.vi ------> vf = (I + m.vi)/m ------> vf = I/m + vi
Where I 28 N.s, m = 4 Kg, and vi = 3 m/s
vf = (28N.s/4kg) + 3m/s = 7m/s + 3m/s
vf = 10 m/s.
.
All the chemical activities within a living thing are called, what?
Metabolism is the answer
What two factors will most likely change the speed of a mechanical wave?
Speed of mechanical wave (sound wave) is given by the formula
[tex]v = \sqrt{\frac{E}{\rho}}[/tex]
here we can say that speed of sound wave depends on two factors
1). E = elasticity
2). [tex]\rho[/tex] = density
also we can have the string wave speed given by the equation as
[tex]v = \sqrt{\frac{T}{\mu}}[/tex]
here we can say it will depends on
1). T = tension in the string
2)[tex]\mu[/tex] = linear mass density
Also we will have the speed of sound in gases given as
[tex]v = \sqrt{\frac{\gamma RT}{M}}[/tex]
here it depends on two factors as
1). [tex]\gamma[/tex] = Type of gas
2). T = temperature of gas
The speed of a mechanical wave is predominantly determined by the medium through which it travels and the energy of the wave itself, which is dependent on its amplitude and frequency. Changes in these factors will result in changes in the speed of the wave.
Explanation:The two primary factors that can alter the speed of a mechanical wave are the characteristics of the medium through which it is traveling and the energy of the wave itself, which is related to its amplitude and frequency. For instance, the speed of sound waves can change when they travel from one medium to another, however the frequency typically remains constant. Therefore, if the speed changes but the frequency remains the same, the wavelength has to adjust accordingly.
For example, in a guitar, the strings vibrate to produce sound. The speed of the waves on the strings, along with the wavelength, determines the frequency of the sound that we hear. All strings may be made of similar material, but they have different thicknesses and thus, different linear densities. The linear density is defined as the mass per length, and can influence the speed of the wave.
Ultimately, waves are energy in motion and their speed can be affected by any change in the medium they travel through or the energy they carry.
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1. An 800-gram bowling ball is rolling in a straight line toward you. If its momentum is 16 kg•m/sec, how fast is it traveling?
Answer:
The ball is rolling at a speed of 0.02 meter per second.
Step by step explanation:
We are given that there is a 800 gram bowling ball rolling in a straight line. If its momentum is given to be 16 kg.m/sec, we are to find its velocity.
For this, we will use the formula of momentum.
Momentum = mass × velocity
16 = 800 × velocity
Velocity = 16/800 = 0.02 meter per second
A tree limb of mass 12 kg falls straight down. If air resistance exerts 27 N of force on the limb as it falls, what is the net force on the tree limb
The net force is 27 n
Answer: 91N down
Explanation:
Which type of fault occurs when rock is subjected to this type of stress
Answer: normal fault
Explanation:
Answer: B) normal
Explaination: A normal fault the plates move away from the fault
an engine has a high temperature reservoir of 540K and a low-temperature reservoir of 350K. what is the maximum possible theoretical efficiency of this engine?
Answer:
35.2 %
Explanation:
The maximum possible theoretical efficiency of an engine is given by:
[tex]\eta=1-\frac{T_C}{T_H}[/tex]
where
[tex]T_C[/tex] is the low-temperature reservoir
[tex]T_H[/tex] is the hot-temperature reservoir
For the engine in this problem, we have
[tex]T_C = 350 K\\T_H=540 K[/tex]
Substituting into the equation, we find
[tex]\eta=1-\frac{350 K}{540 K}=0.352=35.2 \%[/tex]
Which is the average kinetic energy of particles in an object
Answer:
temperature
hgjnhgfmnjhgfm
The average kinetic energy of particles in an object is determined by the average energy of each particle due to its motion, which can be calculated using the equation K = 1/2*m*v². This energy is directly proportional to the particle's absolute temperature and can be influenced by changes in mass, velocity, or temperature.
Explanation:The average kinetic energy of particles in an object refers to the average amount of energy that each individual particle has due to its motion. This energy, denoted as K, can be calculated using the equation K = 1/2*m*V² where m is the particle's mass and V is its velocity. The kinetic energy of a particle is directly proportional to its absolute temperature.
For example, in the context of thermodynamics, an air molecule at room temperature (approximately 293 K) will have an average kinetic energy of (1.38 × 10-23 J/K)(293 K) = 6.07 × 10-21 J. Meanwhile, immediately following the Big Bang, when the universe's temperature was approximately 10³² K, the average thermal energy of a particle would have been 10¹⁹ GeV.
The average kinetic energy of particles in an object can vary based on factors such as changes in mass, velocity, or temperature. For example, in the image provided (Figure 11.4), the higher-temperature region contains particles with higher kinetic energy, while those in the lower-temperature region have lower kinetic energy. Collisions between particles can cause energy to transfer from higher-energy to lower-energy particles, thereby changing the average kinetic energy of the particles in the system.
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A body of mass 10kg and initially at rest is subjected to a force of 20N for 1 second.calculate the kinetic energy during that time
Answer:
20 J
Explanation:
First find the acceleration:
F = ma
20 N = (10 kg) a
a = 2 m/s²
Now find the final velocity:
v = at + v₀
v = (2 m/s²) (1 s) + 0 m/s
v = 2 m/s
Now find the final kinetic energy:
KE = 1/2 mv²
KE = 1/2 (10 kg) (2 m/s)²
KE = 20 J
What is the wavelength of an earthquake wave if it has a speed of 15 km/s and a frequency of 12 Hz?
Explanation:
The velocity [tex]V[/tex] of a wave is given by:
[tex]V=\lambda.f[/tex] (1)
Where:
[tex]\lambda[/tex] is the wavelength of the wave
[tex]f[/tex] is the frequency of the wave. Its unit is Hertz ([tex]1Hz=\frac{1}{s}[/tex])
So, we have to find [tex]\lambda[/tex] from equation (1):
[tex]\lambda=\frac{V}{f}[/tex] (2)
[tex]\lambda=\frac{15km/s}{12Hz}[/tex]
Finally we obtain the wavelength of the earthquake wave:
[tex]\lambda=1.25 km[/tex]
Why doesn’t a machine that increases force break the law of conservation of energy?
Answer:
A machine in which work input equals work output. energy can be used to do work, work can be used to transfer energy. The change in the kinetic energy of an object is equal to the net work done on the object.
hope this helps
Atoms form chemical bonds using:
A. Electrons in the innermost energy level
B. electrons in the outermost energy levels
D. Protons and electrons
A electrons in the innermost energy level
Atoms form chemical bonds using their outermost electrons, also known as valence electrons. The aim is to achieve a stable electronic configuration. An example can be seen in water molecules where oxygen shares its outermost electrons with hydrogen to form covalent bonds.
Explanation:Atoms form chemical bonds using their electrons in the outermost energy levels. These are known as valence electrons. The desire of atoms to reach a stable electronic configuration, often mimicking the electron configuration of noble gases, drives the formation of chemical bonds.
For example, in a water molecule (H2O), the oxygen atom shares its outermost electrons with two hydrogen atoms to form covalent bonds. These shared electrons provide each atom with a more stable electron configuration.
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The connections of many simple pieces in the brain is evidence of the:
Brian’s Complexity Brian’s Complexity Brian’s Complexity Brian’s Complexity
Answer:
Brain's complexity
Explanation: In human body the most complex organ is brain. Its weight is around 1.4 kilograms and this jelly- like mass of tissue contains about billions of nerve cells. It forms a million new connections within seconds and its strength and pattern keeps changing. So no two brain are same. Personalities, memories, habits are the result of these changing connections.
The SI units for measuring the velocity of the car: The SI units for measuring the acceleration of the car: The SI units for measuring force: The SI units for measuring mass:
Velocity ... m/s (meters per second) and angle
Acceleration ... m/s^2 and angle
Force ... Newton (kg-m/s^2) and angle
Mass ... kilogram
Answer:
The SI unit of velocity, acceleration, force and mass of the car are m/s, m/s², kg-m/s² and kg.
Explanation:
SI unit is the international system units.
We need to define the SI unit of velocity, acceleration, force and mass of the car
The SI unit of velocity is
[tex]v = m/s[/tex]
The SI unit of acceleration is
[tex]a = m/s^2[/tex]
The SI unit of force is
[tex]F = N=kg-m/s^2[/tex]
The SI unit of mass is
[tex]m =kg[/tex]
Hence, The SI unit of velocity, acceleration, force and mass of the car are m/s, m/s², kg-m/s² and kg.
How are step-up transformers used in the transmission of electrical energy?
A They decrease the voltage before it leaves a power plant.
B They increase the voltage for efficient long-distance transmission.
C They increase the current for efficient long-distance transmission.
D They increase the voltage and the current for a short distance
transmission
Answer:
B
Explanation:
Transformer is a device used to convert low a.c. voltage to high a.c. voltage and vice versa.
There is two types of transformer, they are:
1.Step up transformer
It converts low a.c. voltage into high a.c. voltage.
2.Step down transformer
It converts low a.c. voltage to high a.c. voltage.
If a 20 kg artillery shell is launched vertically with a velocity of 37 m/s, how high in meters does it rise? Use the acceleration due to gravity as 9.8 m/s2.
or-
how do you calculate projectile motion? What are the formulas?
1. 69.8 m
The vertical motion of the shell is a uniformly accelerated motion, with constant acceleration [tex]g=-9.81 m/s^2[/tex] towards the ground (acceleration due to gravity).
At the point of maximum height, the velocity of the projectile is zero:
v = 0
So we can find the maximum height by using the equation:
[tex]v^2 -u^2 = 2gd[/tex]
where
u = 37 m/s is the initial velocity
d is the maximum heigth
Solving for d,
[tex]d=\frac{v^2-u^2}{2g}=\frac{0^2-(37 m/s)^2}{2(-9.81 m/s^2)}=69.8 m[/tex]
2)
A projectile motion consists of two separate motions:
- A uniform motion along the x-direction, with constant velocity given by
[tex]v_x = v_0 cos \theta[/tex]
where [tex]v_0[/tex] is the initial velocity, and [tex]\theta[/tex] the angle of launch
- A unformly accelerated motion along the y-direction, with initial velocity
[tex]v_y = v_0 sin \theta[/tex]
and constant acceleration
[tex]g=-9.81 m/s^2[/tex] (acceleration due to gravity) towards the ground.
The horizontal position of the projectile at time t is given by
[tex]x(t) = v_x t[/tex]
while the vertical position is given by
[tex]y(t) = y_0 + v_0 sin \theta t + \frac{1}{2}gt^2[/tex]
where [tex]y_0[/tex] is the initial height of the projectile.
Final answer:
To calculate the maximum height an artillery shell rises, use the kinematic equation for projectile motion, substituting in the initial velocity, final velocity (0 m/s), and acceleration due to gravity, resulting in approximately 70.14 meters.
Explanation:
Calculating Projectile Motion
To calculate how high a projectile rises, we can use the following kinematic equation which is part of the projectile motion concepts:
vf^2 = vi^2 + 2ad
Where vf is the final velocity, vi is the initial velocity, a is the acceleration, and d is the displacement or height in this case. For a projectile launched vertically, its final velocity at its peak height will be 0 m/s. Hence, solving for d gives us:
d = (vf^2 - vi^2) / (2a)
Substituting the given values: vi = 37 m/s, a = -9.8 m/s2 (the negative sign indicates acceleration is opposite to the direction of the initial velocity), and vf = 0 m/s, we get:
d = (0^2 - 37^2) / (2 * -9.8)
After calculation, the maximum height the artillery shell rises is approximately 70.14 meters.
Which of the following accurately describes properties of valence? A. The greater the number of electrons an atom has to borrow or to lend, the greater the activity of the atom. B. Metals tend to have a negative valence and tend to be electron borrowers. C. The smaller the number of electrons an atom has to borrow or to lend, the greater the activity of the atom. D. Nonmetallic elements tend to have a positive valence and tend to be electron borrowers.
Answer:
I've done this test a couple days ago and got a hundred. The answer you are looking for is C, The small the number of electrons and atom has to borrow or to lend, the greater the activity of the atom.
Explanation:
, The small the number of electrons and atom has to borrow or to lend, the greater the activity of the atom.
A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby has a mass of 4kg. The carriage has —— energy. Calculate it.
Answer:
E=252J
Explanation:
The total mechanical energy of an object or system is given by:
E mech=K+U
Where K is the kinetic energy of the object and U is the potential energy of the object. The carriage, sitting motionless at the top of the hill, has only potential energy in the form of gravitational potential energy.
Gravitational potential energy is given by:
Ug=mgh
Where m is the mass of the object, g is the gravitational acceleration constant, and h is the height of the object above some specific reference point, in this case the ground 21 m below.
The weight of a stationary object at the surface of the earth is equal to the force of gravity acting on the object.
W=→Fg=mg
We are given that the carriage weighs 12 N, therefore mg=12N.
Ug=12N⋅21m
⇒Ug=252Nm=252J
Hope it helped, God bless you!
The baby carriage at the top of the hill possesses gravitational potential energy. Using the formula for potential energy (PE = m x g x h) and given values for mass, gravity, and height, we find the energy of the carriage is 823.2 Joules. The carriage has gravitational potential energy.
Explanation:The energy of the baby carriage at the top of the hill is known as gravitational potential energy, which can be calculated using the formula PE = m x g x h where m is the mass, g is the acceleration due to gravity and h is the height above the ground.
In this case, the mass (m) is 4 kg, the gravitational acceleration (g) is approximately 9.8 m/s², and the height (h) is 21 m. Plugging these values into the formula gives us a potential energy (PE) of PE = 4 kg x 9.8 m/s² x 21 m = 823.2 Joules.
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Jupiter Scaled Diameter of Planets (cm)
Answer:
14.3 cm
Hope this helps you out!
Answer:
25 cm
Explanation:
about the size of a basket ball
A 12–volt car battery pushes a charge through the headlight circuit with a resistance of 8.5 ohms. How much current is passing through the circuit?
Answer:
1.41176471
Explanation:
r=v/I plug it into the formula
what are the similarities between thermionic emission and liquid Vapourizartion?
Answer:
they both evaperated bye heat
Explanation:
Thermionic emission and liquid vaporization are related processes where heat is the primary driver of change. Both absorb heat for transformation, thermionic emission for release of electrons and liquid vaporization to turn into steam. They also both impact their surrounding environment.
Explanation:Both thermionic emission and liquid vaporization are processes that are influenced by an increase in heat or temperature. Thermionic emission is the process whereby heat provides sufficient energy to an element enabling it to overcome forces binding it and thus, it releases electrons. On the other hand, liquid vaporization or evaporation is the process whereby a liquid takes in heat from the surroundings and transforms into a gaseous state.
The similarities between these two processes lie in the fact that both are energy-input-driven processes. In both cases, heat energy is absorbed by the substances for transformation: for thermionic emission to release of electrons and, for liquid vaporization to turn into steam. Therefore heat acts as the fundamental driver of change in both instances.
Furthermore, both processes have impact on the surrounding environment. In thermionic emission, the released electrons can affect nearby substances, and in liquid vaporization, the absorbed heat can cool the surroundings. Therefore, both these processes do not just involve the substances undergoing the changes but also influence the larger environment they are a part of.
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The magnetic force on a wire 274 cm long is . If electrons move through the wire in 1.90 s, what is the magnitude of magnetic field that is perpendicular to the wire?
Answer:
Matter & Energy
Math Review
Kinematics
Defining Motion
Graphing Motion
Kinematic Equations
Free Fall
Projectile Motion
Relative Velocity
Dynamics
Newton's 1st Law
Free Body Diagrams
Newton's 2nd Law
Static Equilibrium
Newton's 3rd Law
Friction
Ramps and Inclines
Atwood Machines
Momentum
Impulse & Momentum
Conservation Laws
Types of Collisions
Center of Mass
UCM & Gravity
Uniform Circular Motion
Gravity
Kepler's Laws
Rotational Motion
Rotational Kinematics
Torque
Angular Momentum
Rotational KE
Work, Energy & Power
Work
Hooke's Law
Power
Energy
Conservation of Energy
Fluid Mechanics
Density
Pressure
Buoyancy
Pascal's Principle
Fluid Continuity
Bernoulli's Principle
Thermal Physics
Temperature
Thermal Expansion
Heat
Phase Changes
Ideal Gas Law
Thermodynamics
Electrostatics
Electric Charges
Coulomb's Law
Electric Fields
Potential Difference
Capacitors
Current Electricity
Electric Current
Resistance
Ohm's Law
Circuits
Electric Meters
Circuit Analysis
Magnetism
Magnetic Fields
The Compass
Electromagnetism
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Silicon
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Transistors
Digital Logic
Processing
Integration
Waves & Sound
Wave Characteristics
Wave Equation
Sound
Interference
Doppler Effect
Optics
Reflection
Refraction
Diffraction
EM Spectrum
Modern Physics
Wave-Particle Duality
Models of the Atom
M-E Equivalence
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Relativity
MAGNETISM
Magnetic Fields
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Electromagnetism
Electromagnetism
In 1820, Danish physicist Hans Christian Oersted found that a current running through a wire created a magnetic field, kicking off the modern study of electromagnetism.
Moving electric charges create magnetic fields. You can test this by placing a compass near a current-carrying wire. The compass will line up with the induced magnetic field.
To determine the direction of the electrically-induced magnetic field due to a long straight current-carrying wire, use the first right hand rule (RHR) by pointing your right-hand thumb in the direction of positive current flow. The curve of your fingers then shows the direction of the magnetic field around a wire (depicted at right).
You can obtain an even stronger magnetic field by wrapping a coil of wire in a series of loops known as a solenoid and flowing current through the wire. This is known as an electromagnet. You can make the magnetic field from the electromagnet even stronger by placing a piece of iron inside the coils of wire. The second right hand rule tells you the direction of the magnetic field due to an electromagnet. Wrap your fingers around the solenoid in the direction of positive current flow. Your thumb will point toward the north end of the induced magnetic field, as shown below.
Explanation:
A lighting strike heats the air to about ______ degrees Celsius
Answer:
20,000, though, I'm not completely sure.
Explanation:
"Sound is generated along the length of the lightning channel as the atmosphere is heated by the electrical discharge to the order of 20,000 degrees C (3 times the temperature of the surface of the sun)."
World class swimmers can swim the 100 meter in about 55 seconds what is their approximate average speed
About 1.8181 meters per second
Answer:
v = 1.82 m/s
Explanation:
As we know that average speed is defined as the total distance covered in total interval of time.
So here given that
total distance = 100 m
total time = 55 s
so here from above formula
[tex]v_{avg} = \frac{d}{t}[/tex]
[tex]v_{avg} = \frac{100}{55}[/tex]
[tex]v_{avg} = 1.82 m/s[/tex]
so the average speed of the swimmer will be 1.82 m/s
What causes electric current in a wire
Answer:
The difference in potential at two points in a wire causes electric current in a wire.
Explanation:
Electric Current:
The flow of Electric charges is called Electric Current.
An electric current is said to exist when there is a net flow of electric charge through a region. In electric circuits this charge is often carried by electrons moving through a wire.
Electrons move in a wire from lower potential to higher potential because, positive charge attracts the negative charge and causes it to move towards itself.
on the surface of planet X, the acceleration due to gravity is 16 m/s^2. What is the weight of a 6.0 kg mass located on the surface of planet X?
Answer:
96 newtons is the weight of that 6 kg mass.
Explanation:
Weight equal to mass x acceleration
6 x 16
96 newtons
That 6 kg body feels that it have 9.6 kg mass. But actually not mass is constant overall universe and weight is a variable.
Weight is the product of mass and acceleration due to gravity. The weight of a 6 kg mass located on the surface of planet X is 98 N
Weight of an object is different in different planet due to differences in acceleration due to gravity. Since mass of a body is always constant.
The acceleration due to gravity on planet earth is approximately equal to 9.8 m/[tex]s^{2}[/tex]
To calculate the weight W of a body or any object, we multiply the mass m of the body with the acceleration due to gravity g of that planet. That is,
W = mg
From the given question, the parameter given are :
m = 6 kg
g = 16 m/[tex]s^{2}[/tex]
Substitute all the parameter into the formula
W = 6 x 16
W = 98 N
Therefore, The weight of a 6 kg mass located on the surface of planet X is 98 N
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What is the difference between conductor and insulator
Answer:
There are three types of material as per the condition of charge flow
1) Conductor
2) Insulator
3) Semiconductor
1) Conductors
As we know that conductors are those which offer very small resistance to the flow of charge
Resistivity of the conductors are very small
2) Insulators
These type of materials offer large resistance to the flow of charges and it will not pass the current through it
So resistivity of the insulators are large as compared to conductors
A coffee maker uses 7 amps of current and 110 volts.
1. How much power does it use?
117 watts
770 watts
16 watts
103 watts
Power=Amperage *Voltage
P=I*V
7 amps*110 volts
770 watts
Answer: second choice
Prior to the industrial era, pre 1780 ___ affected earth climate because they emitter both aerosols and carbon dioxide into the atmosphere
A) sunspots
B) volcanoes
C) fossil fuels
D) meteorite impacts
Answer:
B. volcanoes
Explanation: Prior to the industrial era, volcanoes affected earth climate because they emitted both aerosols and carbon dioxide, sulfur dioxide into the atmosphere.When volcanic eruption take place they eject lava, sulfur dioxide, carbon dioxide, silica, ash, molten rock and dust. These gases makes the environment very dusty and polluted. These volcanic gases stays in atmosphere forever and affect the climate.
Answer: the answer is b volcanoes
Explanation:
What are the characteristics of a
unit?
Answer:
Two characteristics of a unit are:
It should be of convenient size.
It must be universally accepted i.e. its value must remain the same at all places and at all times.