300 kelvin temperature, in kelvins, will atoms of a monatomic gas have an average kinetic energy equal to this needed electrical potential energy.
How do you define potential energy?Potential energy is a form of stored energy that is dependent on the relationship between different system components. When a spring is squeezed or extended, its potential energy increases. If a steel ball is lifted above the ground as opposed to falling to the ground, it has higher potential energy.
Our knowledge of the cosmos and how we fit into it depends on potential energy. In fact, potential energy and the labor necessary to move an item are determined by the position of the object in the universe. Everything we do has an impact on something's potential energy.
Briefing:KE=3/2KT
=6.21*10(-21)
=3/2*1.30*10(-23)*T
T=300 kelvin
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Please help please!!
15 points!!
15 points!!
What is an example of an characteristic of a soccer ball
what are ways to improve road safety?
Answer:
Road safety can be drastically increased if all the drivers on the road were considerate. For eg, if a person is driving slow then one should be considerate enough to wait till he gives side. Also if a person is not confident and driving slow then he should be considerate enough to drive in the slow lane.
Explanation:
safety rules on the road?
Important Traffic Rules To Follow To Ensure Safety While Driving
Always wear a seatbelt. ...
Avoid distractions. ...
Do not cross the speed limits. ...
Service your car regularly. ...
Follow traffic signals. ...
Maintain lane discipline. ...
Be careful during bad weather. ...
Maintain a safe distance.
a liquid of density 1457 kg/m3 flows through two horizontal sections of tubing joined end to end. in the first section the cross-sectional area is 4.36 cm2 , the flow speed is 3.4 m/s, and the pressure is 167 kpa . in the second section the cross-sectional area is 2.89 cm2.
A. Assume incompressible flow
Since volumtric flow rate will be same in both section
Q1 = Q2
A1*V1 = A2*V2
V2 = A1*V1/A2
V2 = 6.9*10^-4*288*10^-2/(3.3*10^-4)
V2 = 6.02 m/sec
B. using bernoulli's equation:
P1/rho + v1^2/2 + g*h1 = P2/rho + v2^2/2 + g*h2
Since pipes are horizontal
h1 = h2
P1/rho + v1^2/2 = P2/rho + v2^2/2
P2 = P1 + (v1^2 - v2^2)*rho/2
P2 = 1.5*10^5 + (2.88^2 - 6.02^2)*1100/2
P2 = 1.35*10^5 Pa
The rate of change in position of an object in any course. Speed is measured because the ratio of distance to the time wherein the distance became included. Speed is a scalar amount because it has handiest route and no significance.
Velocity can be notion of as the rate at which an object covers distance. A quick-moving object has a high speed and covers a notably big distance in a given amount of time, whilst a sluggish-shifting item covers a relatively small amount of distance in the same amount of time.
The primary unit or the S.I. unit of velocity is m/s or ms?¹.
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The four tires of an automobile are inflated to an absolute pressure of 2.0 x 105
Pa. Each tire has an area of 0.024 m? in contact with the ground. Determine the weight (Fg) of the automobile.
The four tires of an automobile are inflated to an absolute pressure of 2.0 x 10⁵ Pa. A total of 0.024 m2 of each tire is in touch with the ground. Then the weight (Fg) of the automobile is 19.2 × 10³ N.
The definition of pressure is "force per unit area." P = F/A, for example, yields the force on a unit area. Its Pascal (Pa) SI unit is equivalent to N/m2. is a scalar quantity. its dimensions are [M¹ L⁻¹ T⁻²]. Mass times the gravitational acceleration equals weight.
Pressure is P = F/A
Force on each tire,
F' = PA = 2.0 x 10⁵ Pa × 0.024 m²
F' = 4.8 × 10³ N
For on for tires,
F = F'×4
F = 4.8 × 10³ N × 4
F = 4.8 × 10³ N × 4
F = 19.2 × 10³ N
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differentiate between the properties and examples of conductors and insulators
Conductors are materials that allow electrical charges to flow through them easily, such as metals, while insulators are materials that resist the flow of electrical charges and do not conduct electricity, such as rubber or plastic.
Conductors and insulators are two types of materials with very different electrical properties. Conductors allow electricity to flow freely through them, while insulators prevent the flow of electricity. Conductors have a low resistance to electrical flow, while insulators have a high resistance.
Examples of conductors include metals like copper and aluminum, as well as water and human tissue. Examples of insulators include rubber, plastic, glass, and air. Conductors are commonly used in electrical wiring and circuits, while insulators are used to protect people and equipment from electric shocks and to prevent electrical interference.
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5. A car-driver of mass 60 kg is in a crash.
He decelerates, from 20 m/s to rest, in
2 seconds. Calculate:
a) His deceleration,
b) The force exerted on him (by his seat and
seat-belt).
please can someone explain the working and equation involved in this? thanks :)
Answer:
Explanation:
a) To calculate the deceleration of the car-driver, we can use the formula:
acceleration = (final velocity - initial velocity) / time
In this case, the initial velocity is 20 m/s, the final velocity is 0 m/s, and the time is 2 seconds. So, we have:
acceleration = (0 m/s - 20 m/s) / 2 s
acceleration = -10 m/s^2
The negative sign indicates that the deceleration is in the opposite direction of the initial velocity.
b) To calculate the force exerted on the car-driver, we can use Newton's second law of motion, which states that force is equal to mass times acceleration:
force = mass x acceleration
In this case, the mass of the car-driver is 60 kg, and the deceleration is -10 m/s^2 (as calculated above). So, we have:
force = 60 kg x (-10 m/s^2)
force = -600 N
The negative sign indicates that the force is in the opposite direction of the car-driver's initial velocity. This force is exerted on the car-driver by the seat and seat-belt, which are designed to restrain the car-driver and prevent them from flying forward due to the deceleration of the car.
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The Drop
How much time would a 4 kg ball take to fall 1.5 meters?
Answer:
t = 0.553
Explanation:
The mass has nothing to do with an object falling.
Givens
d = 1.5 m
a = 9.8
vi = 0
t = ?
Formula
d = vi * t + 1/2 a t^2
Solution
1.5 = 0 + 1/2 9.81 * t^2
1.5 = 4.905 t^2
1.5/4.905 = t^2
0.3058 = t^2
sqrt(t^2) = sqrt(0.3058)
t = 0.553
About 1/2 a second which is really surprising wouldn't you think?
if the incident intensity of the light is 78 w/m, what is the intensity of the light that emerges from the filter? (express your answer to two significant figures.)
The intensity of the light that emerges from the filter is 38 w/m.
According to Malus's Law, the intensity of light that passes through a polarizer is proportional to the cosine squared of the angle between the transmission axis of the polarizer and the direction of polarization of the light. The equation is given as I = I_0 cos²θ where I is the transmitted light intensity, I_0 is the incident light intensity, and θ is the angle between the polarization direction and the transmission axis of the polarizer.In this case, the incident intensity of light is 78 W/m. Since the filter is placed perpendicular to the direction of polarization of the incident light, the angle between the polarization direction and the transmission axis of the polarizer is 90°. Thus, θ = 90°, cos θ = 0, and the transmitted light intensity is zero. Therefore, the intensity of the light that emerges from the filter is 0.
Force is the degree, volume, or greatness of a thing, like fire, feeling, climate, work, or energy. The word "intensity" is frequently associated with rage, passion, and violence. It is used to talk about the intensity of things like a love affair or perhaps a flame.
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Which is a characteristic of the electron Sea model for Metallic bonding
Answer:
In metallic bonds, the valence electrons from the s and p orbitals of the interacting metal atoms delocalize. That is to say, instead of orbiting their respective metal atoms, they form a “sea” of electrons that surrounds the positively charged atomic nuclei of the interacting metal ions.
Explanation:
Answer:
Electrons flow easily between metal nuclei :)
Explanation:
An in-line skater first accelerates from 0. 0 m/s to 5. 0 m/s in 4. 5 s, then continues at this constant speed for another 4. 5 s. What is the total distance traveled by the in-line skater?.
The total distance traveled by the in-line skater is 33.75 metres.
The total distance will be calculated by the sum of distance due to acceleration and distance due to constant speed. Converting the above mentioned formula in mathematical expression to be used:
d = (v+u/2)×t + v×t
Keep the values in formula to find the total distance.
d = (5+0/2)×4.5 + 5×4.5
Performing addition and multiplication on Right Hand Side of the equation
d = 2.5×4.5 + 22.5
Performing only multiplication on Right Hand Side of the equation
d = 11.25 + 22.5
Performing only addition on Right Hand Side of the equation
d = 33.75 metres
Thus, the skater traveled 33.75 metres.
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Hz ac source, a 40- ωω resistor, a 0.30-h inductor, and a 60-μf capacitor. the rms current in the circuit is measured to be 1.6 a. what is the power factor of the circuit?
The power factor of the circuit is approximately 0.50.
To determine the power factor of the circuit, we need to calculate the phase angle between the current and voltage in the circuit. The power factor is given by the cosine of this phase angle.
Given:
Frequency (f) = 50 Hz
Resistor (R) = 40 ohms
Inductor (L) = 0.30 H
Capacitor (C) = 60 μF (microfarads)
RMS current (I) = 1.6 A
To find the phase angle, we need to calculate the impedance (Z) of the circuit. Impedance is the total opposition to the flow of current in an AC circuit and is calculated using the formula:
Z = √(R² + (Xl - Xc)²)
where R is the resistance, Xl is the inductive reactance, and Xc is the capacitive reactance.
The inductive reactance (Xl) is given by:
Xl = 2πfL
The capacitive reactance (Xc) is given by:
Xc = 1 / (2πfC)
Now, let's calculate the values:
Xl = 2π × 50 Hz × 0.30 H
≈ 94.25 ohms
Xc = 1 / (2π × 50 Hz × 60 μF)
≈ 53.05 ohms
Next, we calculate the impedance (Z):
Z = √(40² + (94.25 - 53.05)²)
≈ 79.90 ohms
Finally, we can calculate the power factor (PF) using the formula:
PF = cos(θ) = R / Z
PF = 40 ohms / 79.90 ohms
≈ 0.50
Correct Question: A series circuit consists of a 50-Hz ac source, a 40-ohm resistor, a 0.30-H inductor, and a 60-uF capacitor. The RMS current in the circuit is measured to be 1.6 A. What is the power factor of the circuit?
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An object is in simple harmonic motion of the following quantities related to the object, which set of three can have maximum
magnitudes at the same instant of time?
i. displacement
ii. velocity
iii. acceleration
iv. kinetic energy
v. potential energy
Answer:
displacement, acceleration, potential energy
Explanation:
pretty sure this is correct but dont hold me to it.
The set of three that can have maximum magnitudes at the same instant of time will be displacement, acceleration, and potential energy.
What is simple harmonic motion?Simple harmonic motion is periodic motion caused by a restoring force that is proportionate to the deviation from equilibrium.
Simple harmonic motion is periodic motion but many other conditions are dependent.
The object is in simple harmonic motion of the following quantities related to the object.
The set of three that can have maximum magnitudes at the same instant of time will be displacement, acceleration, and potential energy.
Hence the set of three quantities is the options i, iii,v.
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1. Determinar cuanta fuerza es necesaria para empujar un móvil que se encuentra en reposo para que alcance una velocidad de 15 m/s en un tiempo de 20 segundos, considerando que dicho móvil tiene una masa de 1000Kg. No considere que existe fricción.
Responder:
Explicación:
Fuerza = Masa × aceleración
Dado que aceleración = velocidad final - velocidad inicial / tiempo
Fuerza = m (v-u) / t
Dado
Masa = 1000 kg
v = 15 m / s
u = 0 m / s
t = 20 segundos
Sustituye los valores dados en la fórmula para calcular la fuerza.
F = 1000 (15-0) / 20
F = 1000 (15) / 20
F = 15000/20
F = 750N
Explain the difference between the Bohr model and the electron cloud model.
The main difference between the Bohr model and the electron cloud model is explained as, in Bohr's model, orbital paths around the nucleus are treated as discrete electron energy levels but the electron cloud model is a group of electrons circulating around a nucleus or a molecule. Usually refers to the valence electrons.
Some physical quantities can only have discrete values according to quantum theory, Niels Bohr proposed a hypothesis for the hydrogen atom in 1913 i.e. Only in their predefined orbits do electrons move around a nucleus, if they deviate, the energy difference is released as radiation.Erwin Schrodinger, an Austrian physicist, created the electron cloud model in 1926. It was made up of an electron cloud with many different orbital levels surrounding a dense nucleus i.e. negative electrons circle the positive nucleus at fixed distances from the nucleus.According to Erwin Schrodinger, electrons move in waves, making it impossible to accurately determine where they are at any given time. To determine the probability of an electron existing in a specific place, he created an equation.To know more about Bohr model
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What is 1550 dm expressed in hectometers? a. 1550000 hm b. 155.0 hm c. 15.50 hm d. 1.55 hm please select the best answer from the choices provided a b c d
The correct answer is D. 1.55 hm
We need to convert dm to hectometers,
We know that,
1 decimeter = 0.001 hectometers
1 dm = 0.001 hm
Using this conversion we get
(1550 × 1) dm = (1550 × 0.001) hm
1550 dm = 1.55 hm
It means 1550 dm can expressed as 1.55 hectometers.
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A soccer player pumps air into a soccer ball until no more air can be pushed inside. Describe the air inside the soccer ball compared to the air outside the ball. (Use the word "particle" in your explanation.)
Answer:
the filling stops when the pressure of the pump equals the pressure of the interior air plus the pressure of the walls.
Explanation:
This exercise asks to describe the inflation situation of a spherical fultball.
Initially the balloon is deflated, therefore the internal pressure is equal to the pressure of the air outside, atmospheric pressure, when it begins to inflate the balloon with a pump this creates a pressure in the inlet valve and as it is greater than the pressure inside, the air enters it, this is repeated in each filling cycle, manual pump.
When the ball is full we have two forces, the one created by the external walls and the one aired by the pressure of the pump, these forces are directed towards the inside, but the air molecules exert a pressure towards the outside, which translates into a force. When these two forces are equal, the pump is no longer able to continue introducing air into the balloon.
Consequently the filling stops when the pressure of the pump equals the pressure of the interior air plus the pressure of the walls.
Correct the given statement: third law of motion states that action and reaction always act on same bodies in same directions.
Answer:
third law of motion states that for every action there is an equal and opposite reaction
Explanation:
force exerted on an object is equal to force the object exerts
Figure shows the variation of Coulomb force (F) Vs. 1/ for two point charges kept in two different media A
2
and B having different values of electrical permittivity. Which out of these two media has greater value of
dielectric constant? Why
Media B has a greater value of dielectric constant compared to media A. The dielectric constant, also known as the relative permittivity, measures a material's ability to store electrical energy in an electric field.
In the given scenario, as the Coulomb force (F) is plotted against 1/∈ (inverse of electrical permittivity), the slope of the graph represents the dielectric constant. If the slope is steeper, it indicates a higher dielectric constant. Therefore, media B has a greater dielectric constant than media A.
The dielectric constant quantifies the extent to which a material can polarize and store electric charge in an electric field. It is a measure of the material's ability to permit or resist the formation of an electric field. In the given scenario, the graph of Coulomb force (F) versus 1/∈ is plotted, where F represents the force between two point charges and ∈ represents the electrical permittivity.
By analyzing the graph, we observe that the slope of the graph represents the dielectric constant. A steeper slope indicates a higher dielectric constant. Therefore, when comparing the two media A and B, if the graph for media B has a steeper slope, it implies that media B has a greater dielectric constant compared to media A.
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A duck is flying around and its velocity v as a function of time t is given in the graph below where rightwards is the positive velocity direction. What time t does the duck have the same position as time t = 0 secs?
Answer:
t= 2.0s
Explanation:
Khan Academy
what is the volume of a bar of soap that is 9 cm long, 5 cm wide, and 2 cm high?
Answer:
90cm
Explanation:
2x5=10
10x9=90
Answer:
90 cm
Explanation:
To find volume, the formula is V=LWH
L is the length, W is the width and H is the height:
9 x 5 x 2 = 90
So V = 90 cm
Hope this helps you out! : )
A block (5 kg) is pulled by a 50 N at an angle of 30◦tothe ground. The block experiences a 4,2 N frictional force and moves 2,60 m. The block starts from rest. Use the work-energy principle to calculate the speed of the block after the 2,60 m.
Please explain/name all formulas used.
The speed of the block after the 2,60 m is determined as 6.38 m/s.
What is the work done on the block?
The work done on the block is calculated by applying the principle of Newton's second law of motion to determine the net work done on the block as shown below.
W = F(net)d
where;
F(net) is the net forced is the distanceF(net) = Fcosθ - Ff
where;
F is the applied forceFf is the frictional forceF(net) = 50 cos(30) - 4.2
F(net) = 39.1 N
The speed of the block is calculated by applying the principle of work energy theorem.
K.E = W
¹/₂mv² = F(net)d
mv² = 2F(net)d
v² = [2F(net)d] / m
v = √[2F(net)d] / m]
v = √[2 x 39.1 x 2.6] / 5]
v = 6.38 m/s
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Each gas sample has the same temperature and pressure. which sample occupies the greatest volume? each gas sample has the same temperature and pressure. which sample occupies the greatest volume? 40.0 gar 20.0 gne 20.0 gh2 4.0 ghe
Answer:
20 gram of H as the greastest volume
Explanation:
Each gas sample has the same temperature and pressure. which sample occupies the greatest volume? each gas sample has the same temperature and pressure. which sample occupies the greatest volume? 40.0 gar 20.0 gne 20.0 gh2 4.0 ghe
Given that,
40.0 g of Ar
20.0 g of Ne
20.0 g of h
24.0 g of he
The ideal gas equation ; Pv = nRT
where P is the pressure, V is the volume, R is the gas constant, T is the temperature, n is the number of mole
which is equal to
n = m / M
where m is the given mass
M is the molar mass
The given gas sample are at the same temperature and pressure,
So, the temperature, pressure and gas constant are fixed.
Therefore the volume is proportional to the given mass and molar mass
V ∝ m/M
Substitute the given mass and molar mass of given masses for comparison
No of mole of Ar = mass / molar mass
= 40 / 40 = 1 mole
No of mole of Ne = mass / molar mass
= 20 / 20 = 1 mole
No of mole of h = mass / molar mass
= 20 / 1 = 20 mole
No of mole of he = mass / molar mass
= 24 / 4 = 6 mole
Hence, 20 gram of H as the greastest volume
Does a wire connected to a dc source, such as a battery, emit an electromagnetic wave?
The wire connected to the DC source doesn't emit electromagnetic waves.
The electromagnetic wave is an oscillation of electric fields and magnets field that sustains each other, this wave time has the characteristics that it can travel without a material medium, for which they are of extreme importance.
It is caused by DC sources such as batteries only having a constant voltage, it is different from AC sources which have different voltage over time, AC voltage can induce the wire because AC sources have magnetic flux change. DC sources don't have magnetic flux change so they don't emit electromagnetic waves.
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A car applies a force of 36. 8 newtons for a 668-meter loop; what was the work done?.
The value of the work that was done on the car is 24.6 J.
How to calculate how much the work on the car was done?Work is an energy that move from or to one object into another object that might make the object have the displacement, or we can say work is equal to force multiply with displacement in meters. In formula form, it will be written as W = F x s. As per data given F = 36.8 N and s = 668 m. The work will be:
W = F x s
W = 36.8 x 668
W = 24,582J
Let round the work value. So, the work value will be 24.6 J
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. The average human walks at a speed of 5 km per hour. If your PE teacher asks you to walk for 30 minutes in
gym class, how far would you walk (km)?
Answer: 2.5 km
Explanation:
5/2 = 2.5 km
60/2 = 30 mins
How much force is required to keep a 2-kg object moving to the right with a constant speed of 6.0 m/s?
A. 0 m/s
B. .33 m/s
C. 3 m/s
D. 12 m/s
The force required to keep a 2 kg object moving to the right with a constant speed of 6.0 m/s is calculated to be 0 N.
It is given that the mass of the object m is 2 kg.
As the body is said to be moving with constant speed, its acceleration would be rate of change of velocity, which would be zero.
Acceleration a = 0
Now, let us calculate the force required to move the 2 kg object. From Newton's second law, we know the expression, F = m a.
where,
m is mass
a is acceleration
F = m a = 2 × 0 = 0 N
Thus, the required force to move the object in right direction is calculated to be 0 N.
The given options have inappropriate units. They should be in Newtons.
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How much force is required (in Newtons) to accelerate a 12-kg bicycle, along with its 50-kg rider, at 2 m/s2?
Give your answer as a number.
Answer:
F = 124 N
Explanation:
Given that,
The mass of bicycle and the rider, m = 12 kg + 50 kg = 62 kg
Acceleration of system, a = 2 m/s²
We need to find the force required to accelerate the system. We know that,
Net force, F = ma
Put all the values,
F = 62 kg × 2 m/s²
F = 124 N
So, the required force is equal to 124 N.
By comparing fossils of a species from long ago to those of today, we can conclude that *
1 point
fossils show no evidence of relationship between the past and present.
past species were more likely to be fossilized than today's.
today's species evolved from those of the past.
present species live longer.
Answer:
today's species evolved from those of the past.
Explanation:
By comparing fossils of a specie from long ago to those of today, we can conclude that today's species evolved from those of the past.
Fossils are the preserved remains of ancient life forms found within sedimentary bed layers. These fossils helps scientists to understand ancient life forms. According to the discovery of Charles Darwin, organisms have evolved and are still evolving. Understanding past life forms gives a way to characterize present day species better.Một dây dẫn bằng nicorom dài 30m, tiết diện 0,3mm2 được mắc vào hiệu điện thế 220v . tính cường độ dòng điện chạy qua dây dẫn
Answer: it is A hope that helps
Explanation:
Are all forms of radiation safe for humans?
Answer:
there are not all safe for humans