The minimum value of coefficient of friction is 0.13, and the value must be larger than or equal to 0.13.
What is centripetal acceleration?Centripetal acceleration is a characteristic of an object's motion along a circular path. Centripetal acceleration applies to any item travelling in a circle with an acceleration vector pointing in the direction of the circle's center.
In your daily existence, you must have encountered numerous instances of centripetal acceleration. A centripetal acceleration occurs when you drive in a circle, and a centripetal acceleration also occurs when a satellite orbits the earth. Centripetal refers to being in the center.
We know that: static friction force is given by: fs,max = μn,
The centripetal force used to keep the rider moving in a circle in this instance constitutes the normal force.
The cylinder's wall generates that centripetal force, which is:
Fc = mv²/r = mω²r.
According to the question: ω= 5.00 rad/s, and r = 3.00 m.
So, Fc/m = w2r = (5.00 rad/s)2(3.00 m) = 75.0 m/s².
Each rider must balance the gravity force with the force of static friction., fs = μFc > mg.
Therefore, μ > mg/Fc
mg/Fc = (9.8 m/s²)/(75.0 m/s²) = 0.13.
Hence, The minimum value of μ is 0.13, and the value must be larger than or equal to 0.13.
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The following are untrue about heat except? (a) it is the measure of the degree of hotness of a body (b) it is a form of energy (c) it can be created (d) it damages thermometer
Heat energy is a form of energy. The things which are untrue include it damages thermometer, and it can be created. It is a measure of hotness of a body. Thus, the correct options are A, C, and D.
What is Heat energy?Heat energy is the result of the movement of tiny particles called as atoms, molecules or ions in different phases such as solids, liquids and gases.
Heat energy is the energy which cannot be created nor destroyed, it can only be transferred from one object to another object. The transfer or flow of energy due to the difference in temperature will take place between the two objects is called heat.
The statements which are untrue about heat include it damages thermometer, and it can be created. It is a measure of hotness of a body.
Therefore, the correct options are A, C, and D.
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Lester plays middle linebacker for dices football team. During one play, he made the following movements. First, he back-pedaled in the southern direction for 2.6 meters
Answer:
Explanation:
missing info .....
What is sound waves
Sound waves are a type of mechanical wave that propagate through a medium, typically air but also other materials such as water or solids.
Characteristics of sound wavesFrequency: the frequency of a sound wave refers to the number of cycles or vibrations it completes per second and is measured in Hertz (Hz).
Amplitude: the amplitude of a sound wave refers to the maximum displacement or intensity of the wave from its equilibrium position. It represents the loudness or volume of the sound, with larger amplitudes corresponding to louder sounds and smaller amplitudes corresponding to softer sounds.
Wavelength: the wavelength of a sound wave is the distance between two consecutive points in the wave that are in phase, such as from one peak to the next or one trough to the next. It is inversely related to the frequency of the wave.
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Describe the cause of waves as a fluid motion
Wind is the most frequent cause waves. The friction between the wind and the surface of the water produces wind-driven waves, also known as surface waves. A wave crest is produced when wind continuously disturbs the water's surface in an ocean or lake.
Waves that include longitudinal and transverse motions include water waves, for instance. The particles move in clockwise rings through the waver as a wave passes over it. The circles' radius gets smaller the deeper into the ocean you go.The disturbance propagates through the medium as a result of the medium's particles oscillating repeatedly and periodically about their equilibrium position. Without any real transfer of the medium's particles, energy and momentum are moved from one place to another.To know more about waves
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a car get slips in a mud
Answer:
So, if the car slips in mud it will either skid or slide depending on the size of the mud puddle.
Does this work?
A racecar begins at rest and accelerates to 25 m/s at a rate of 6.25 m/s2. What distance does the racecar cover?
a.
2 m
b.
156 m
c.
4 m
d.
50 m
Answer:
d.
50 m
Explanation:
v² = u² + 2as
s = (v² - u²) / 2a
s =(25² - 0²) / (2(6.25))
s = 50 m
Skills Practice
4. Starting from one shore, you swim east across a narrow river to the other shore.
The river is 19.0 m wide. As you swim, the river current moves you north up the
river a distance of 12.0 m. Draw a diagram representing this situation What is you
resultant displacement? Express your answer in components, and then determin
the magnitude.
Answer:you think i know jesus im in y8 i barley know any g anyway someone asked me something that only albert eientsien knew .
Explanation:
I'm also cluless but i feel good for helpig other people out
The question involves calculating the resultant displacement of swimming across a river while also being carried north by the current. In this scenario, the eastward displacement is 19.0 m, and the northward displacement due to the current is 12.0 m. Using these vectors, the total displacement can be calculated as approximately 22.36 m.
Explanation:The subject of this question is Physics, specifically the concept of calculating displacement, which is a vector quantity. To solve this, we start by setting up a vector diagram. One vector represents your direction of swimming (east), which is 19.0 m long. The other vector represents the direction of the river current (north), which is 12.0 m long. The resultant displacement is the hypotenuse of the right-angled triangle they form. To calculate this magnitude, express your displacement in components: The eastward displacement is (19.0 m, 0) and the northward displacement is (0, 12.0 m). Finally, we can determine the resultant displacement using the Pythagorean theorem (sqrt[(19.0m)^2 + (12.0m)^2]), which gives a magnitude of approximately 22.36 m.
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Three bitmap charges are placed on the y-axis as in
the figure if the Outcome of the electric forces is
(q1) equal to 4.2 N in the negative y-axis direction
selects the charge type q3 and calculate its amount.
The magnitude of the third charge is determined as -1.37 μc.
Magnitude of charge q3The magnitude of the charge on q3 is calculated as follows;
F = q12 + q23 + q13
F = kq₁q₂/r₂ + kq₂q₃/r² + kq₁q₃/r²
4.2 = (9 x 10⁹ x 2 x 10⁻⁶ x 3 x 10⁻⁶)/(0.1²) + (9 x 10⁹ x 3 x 10⁻⁶q₃)/(0.2²) + (9 x 10⁹ x 2 x 10⁻⁶ x q₃)/0.3²)
4.2 = 5.4 + 675,000q₃ + 200,000q₃
-1.2 = 875,000q₃
q₃ = -1.2/875000
q₃ = -1.37 x 10⁻⁶ C
q₃ = -1.37 μC
Thus, the magnitude of the third charge is determined as -1.37 μc.
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The graph shows a car’s velocity over time, What is the car’s acceleration between 6 and 7 seconds
Based on the given graph of the car’s velocity over time, the car’s acceleration between 6 and 7 seconds is 0 m/s².
What is the acceleration of a body?The acceleration of a body is defined as the rate of change of velocity of a body with time.
Mathematically, the acceleration of a body is given below as follows:
Acceleration = change in velocity / change time
The change in the velocity of a body is given as follows:
Change in the velocity = Final velocity - initial velocity
A velocity-time graph is a graph that plots the velocity of a body against the time taken by the body to move. The slope of a velocity-time graph gives the acceleration of the body.
The acceleration of the car is calculated from the given velocity-time graph as follows:
Acceleration = (60 - 50) m/s / (7 - 6) s
Acceleration = 10 m/s²
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A gymnast launches off a springboard an angle of 40 degreeswith an initial velocity of 8 m/s. a.What is his horizontal velocity?
b.What is his initial vertical velocity?
c.How long does he remain in the air?
d.How far does he travel horizontally?
Nikki was walking around a department store shopping one day, and did not realize that the shirt she was wearing looked just like the shirts worn by employees. When a stranger asked, "do you work here," she thought it was funny. The other customers' assumption that Nikki was a store employee demonstrates the Gestalt principle of _______.
Answer: Similarity
By.
What are the x and y components of the plane's velocity?
The x and y components of the plane's velocity is:
Vx = 38.6 m/sVy = 10.4 m/s1. How do I determine the horizontal component (Vx) of the velocity?
We can obtain the horizontal component (Vx) of the velocity as illustrated below:
Initial velocity (u) = 40 m/sAngle of projection (θ) = 15 °Horizontal component of velocity (Vx) =?Vx = u × Cosθ
Vx = 40 × Cos 15
Vx = 38.6 m/s
Thus, the horizontal component (Vx) of velocity is 38.6 m/s
2. How do I determine the vertical component (Vy) of the velocity?
The vertical component (Vy) of the velocity can be obtained as
Initial velocity (u) = 40 m/sAngle of projection (θ) = 15 °Vertical component of velocity (Vy) =?Vy = u × Sine θ
Vy = 40 × Sine 15
Vy = 10.4 m/s
Thus, the vertical component (Vy) of velocity is 10.4 m/s
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Which theory explains why gravity between two objects changes when the distance between them changes?
Einstein's theory because he suggested that the more distance there is between objects, the more space-time
curves and the greater the strength of gravity is.
Einstein's theory because he suggested that the more distance there is between objects, the more space-time
curves and the weaker the strength of gravity is.
Newton's theory because he suggested that the greater the distance between objects, the greater the pull of gravity.
Newton's theory because he suggested that the greater the distance between objects, the weaker the pull of gravity.
Answer:
Newton's theory because he suggested that the greater the distance between objects, the weaker the pull of gravity.
Answer: The answer is Newton’s theory because he suggested that the greater the distance between objects, the weaker the pull of gravity
Explanation: Just took the test i hope this help you enjoy :D
3 Physics questions
1. A steam shovel raises 450.0 kg of dirt a vertical distance of 8.6 m. The engine provides 200KJ of energy as heat for the steam shovel to lift the dirt. How much work, in Joules, is done by the steam shovel? Use g as 9.81m/s2.WRITE YOUR ANSWER IN SCIENTIFIC NOTATION
2. A coal-burning power plant has an efficiency of 35 percent. If the power plant uses 737M J of energy as heat, how much work is done by the power plant?
3. A certain diesel engine performs 372 J of work in each cycle with an efficiency of 33.0 percent. How much energy is transferred from the engine to the exhaust and cooling system as heat?
Based on the work done of machines:
Work done by steam shovel = 3.796 × 10^5 JoulesWork done by power plant = 257.95 MJ Work lost as heat = 755.27 J What is the work done by the steam shovel?Work done is calculated using the formula:
Work done = Force × distanceForce = mass × acceleration due to gravitywork done = 450 × 9.81 × 8.6
Work done by steam shovel = 3.796 × 10^5 Joules
What is work done by the power plant?The efficiency of a machine is calculated using the formula:
Efficiency = work done by machine/work done on machine × 100%Therefore:
Work done by machine = efficiency × work done on machine/100Work done by machine = 35 × 737/100
Work done by power plant = 257.95 MJ
What is the work done transferred from the engine and exhaust cooling system as heat.The efficiency of a machine is calculated using the formula:
Efficiency = work done by machine/work done on machine × 100%Therefore:
Work done on the machine = work done by the machine × 100/ efficiencyWork done on the machine = 372 × 100/33
Work done on the machine = 1127.27
Then, the work lost as heat is calculated using the formula:
Work lost as heat = work done on machine - work done by machine
Work lost as heat = 1127.27 - 372
Work lost as heat = 755.27 J
Therefore, based on the work done of machines:
Work done by steam shovel = 3.796 × 10^5 JoulesWork done by power plant = 257.95 MJ Work lost as heat = 755.27 JLearn more about work done at: https://brainly.com/question/8119756
Determine the missing side
Answer:
3. 30m
4. 25m
5. 36m
Explanation:
See picture
Two equal, but oppositely charged particles are attracted to each other electrically. The size of the force of attraction is 98.9 N when they are separated by 73.9 cm. What is the magnitude of the charges in microCoulombs ?
Using Coulomb's law:
\(F=K\cdot\frac{|q1||q2|}{r^2}\)Where:
\(\begin{gathered} K=8.988\times10^9 \\ r=0.739m \\ F=98.9N \\ |q1|=|q2| \end{gathered}\)Therefore:
\(98.9=8.988\times10^9\cdot\frac{q1^2}{(0.739^2)}\)Solve for q1:
\(\begin{gathered} q1=\sqrt{\frac{(98.9)(0.739^2)}{8.988\times10^9}} \\ q1\approx7.75\times10^{-5}C \end{gathered}\)Answer the following Critical Thinking Questions. Each answer is worth 5 points, for a total of 25 points.
A particular star is 20 pc away from the Earth, and its luminosity is 160 times the luminosity of the Sun and has a surface temperature of 4000 K. Its absolute magnitude is -0.66. The temperature of the Sun is 5800 K. Explain/show your work.
What is this star's parallax?
What is this star's spectral class?
What is the wavelength at which this star radiates the most energy?
What is this star's apparent magnitude?
What is this star's radius, in solar radii?
A dog walks 15 meters to the east and then 20 meters back to the west
the dig would -5 from where he first started.
How can using a combination of environmental policy tools be ...
Using a combination of environmental policy tools is beneficial to humans because it is a renewable source that can be used repeatedly.
Environmental tools help achieve environmental goals and encourage eco-friendly behavior. This environmental tools handbook was intended for policymakers to help them understand the array of tools accessible to the government and its stakeholders.
Utilizing a wide range of environmental policy tools can be helpful due to the fact that this resource is one that can be replenished and reused over and over again by humans. Take into account the fact that our earth is powered by fossil fuels, which restricts or reduces the quantity of gas we exhale while ensuring that there is clean air for humans, plants, and animals to breathe.
The complete question is as;
How can using a combination of environmental policy tools be beneficial?
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A skater pushes on the back of a 45.3 kg sled with an average force of 72.5 N over a distance of 15.6 m. Find the final speed of the sled if it was moving at 1.31 m/s initially. (Use the work-energy theorem)
Answer:
7.19 m/s
Explanation:
By the work-energy theorem, we have the following equation
\(\begin{gathered} W=K_f-K_i \\ Fd=\frac{1}{2}mv_f^2-\frac{1}{2}mv_i^2 \end{gathered}\)Where F is the force, d is the distance, m is the mass, vf is the final speed and vi is the initial speed. Solving for vf, we get
\(\begin{gathered} Fd+\frac{1}{2}mv_i^2=\frac{1}{2}mv_f^2 \\ 2(Fd+\frac{1}{2}mv_i^2)=mv_f^2 \\ \\ \frac{2(Fd+\frac{1}{2}mv_i^2)}{m}=v_f^2 \\ \\ v_f=\sqrt{\frac{2(Fd+\frac{1}{2}mv_i^2)}{m}} \end{gathered}\)Replacing F = 72.5 N, d = 15.6 m, m = 45.3 kg, and vi = 1.31 m/s, we get
\(\begin{gathered} v_f=\sqrt{\frac{2(72.5N(15.6m)+\frac{1}{2}(45.3kg)(1.31\text{ m/s\rparen}^2)}{45.3\text{ kg}}} \\ \\ v_f=\sqrt{\frac{2(1131\text{ N m + 38.87 N m\rparen}}{45.3\text{ kg}}} \\ \\ v_f=\sqrt{\frac{2339.74\text{ N m}}{45.3\text{ kg}}} \\ \\ v_f=\sqrt{51.65\text{ m}^2\text{ /s}^2} \\ v_f=7.19\text{ m/s} \end{gathered}\)Therefore, the final speed of the sled was 7.19 m/s
An asteroid is in a highly eccentric elliptical orbit around the Sun. The period of the asteroid’s orbit is 90 days. Which of the following statements is true about the possibility of a collision between this asteroid and the Earth? (a) There is no possible danger of a collision. (b) There is a possibility of a collision. (c) There is not enough information to determine whether there is danger of a collision
About the possibility of a collision between this asteroid and the Earth the true statement is there is not enough information to determine whether there is danger of a collision.
What is asteroid?
A tiny, stony object called an asteroid orbits the Sun. They are made up of materials left over from the formation of the solar system and are typically found in the asteroid belt. Most asteroids are less than one kilometer in diameter, but some can be much larger. Asteroids are commonly composed of minerals and metals, such as iron, magnesium, and silicon. Asteroids are classified into three main types: C-type, S-type, and M-type. C-type asteroids are the most common and make up around 75% of known asteroids. They are made up of dark, carbon-rich material and are often referred to as "carbonaceous chondrites". S-type asteroids are made up of silicate material, such as clay and silica, and are typically brighter than C-type asteroids. M-type asteroids are made of metallic material, such as iron and nickel, and are the least common type.
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4.2 Determine the reactions of the loads L and R. ↓ 5m
↓ 7 kN 6m 3 kN 4m R (8)
The reaction of load L is 0 (no horizontal force), and the reaction of load R is 10 kN (vertical upward force).
How to find reaction?To determine the reactions of the loads L and R, consider the equilibrium of the forces acting on the structure.
First, analyze the vertical equilibrium. The sum of the vertical forces must be zero:
ΣFy = R − 7 kN − 3 kN
ΣFy = 0
This gives:
R = 10kN
Next, analyze the horizontal equilibrium. The sum of the horizontal forces must be zero:
ΣFx = L
ΣFx = 0
This indicates that there is no horizontal force acting on the structure.
Therefore, the reaction of load L is zero (no horizontal force), and the reaction of load R is 10 kN (vertical upward force).
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Water at 100 oC is taken off the stove and allowed to cool for 10 minutes. In this 10minutes, the temperature decreased to 65 oC. Given that the room temperature is 21oC, find the temperature of the water in degrees Celsius after an additional 5 minutes waiting time and on condition that the Newton’s Law of cooling is not violated
In order to calculate the temperature after 5 more minutes, we can use the Newton's Law of cooling:
\(T-T_s=(T_0-T_s)e^{kt}\)Where Ts is the ambient temperature and T0 is the initial temperature.
So, using Ts = 21, T0 = 100, T = 65 and t = 10, let's calculate the value of k:
\(\begin{gathered} 65-21=(100-21)e^{10k}\\ \\ 44=79e^{10k}\\ \\ e^{10k}=\frac{44}{79}\\ \\ \ln(e^{10k})=\ln(\frac{44}{79})\\ \\ 10k=-0.58526\\ \\ k=-0.058526 \end{gathered}\)Now, let's use T0 = 65 and t = 5 to calculate the value of T:
\(\begin{gathered} T-21=(65-21)e^{-0.058526\cdot5}\\ \\ T-21=44\cdot e^{-0.29263}\\ \\ T-21=32.84\\ \\ T=32.84+21\\ \\ T=53.84\text{ \degree C} \end{gathered}\)how a baby monster could have one eye even if both parents had two eyes.
Answer:
Both parents could be heterogeneous: Hh.
Explanation:
Both parents could be heterogeneous.
Both parents are Hh.
H = 2 eyes , dominant trait
h = one eye, recessive trait
The childs genotype is hh.
There is a current of 0.83 A through a light bulb in a 120.0v circuit. What is the
resistance of the light bulb?
Answer:
144.6ohms
Explanation:
v=IR
R =V/I=120/0.83
R=144.6
Which is the MOST likely reason scientists are trying to find ways to get energy from more renewable
resources?
А
Renewable resources cost less to produce than
energy from nonrenewable resources
B
Renewable resources are easier to replace than
nonrenewable resources
C
Renewable resources create more power than
nonrenewable resources
D
Renewable resources put more pollution in the air than nonrenewable resources
. Acylinder contains 1 mole of oxygen at
a temperature of 27 °C. The cylinder
is provided with a frictionless piston
which maintains a constant pressure
of 1 atm on the gas. The gas is heated
until its temperature rises to 127 °C.
(a) How much work is done by the
piston in the process?
(b) What is the increase in internal
energy of the gas?
(c) How much heat was supplied
to the gas?
(C = 7.03 calmol-¹°C¯¹;
R = 1.99 calmol-¹°C-¹;
1cal = 4.184 J)
a}The work is done by the piston in the process is 199 cal.
b) The increase in internal energy of the gas is 703 cal
c) The heat was supplied to the gas is 3771 J
(a) To calculate the work done by the piston, we can use the formula:
Work = P * ΔV
Where P is the constant pressure and ΔV is the change in volume. Since the pressure is constant, the work done is given by:
Work = P * (\(V_2 - V_1\))
Since the amount of gas is constant (1 mole), we can use the ideal gas law to calculate the initial and final volumes:
PV = nRT
\(V_1 = (nRT_1) / P_1\)
\(V_2 = (nRT_2) / P_2\)
Here, n is the number of moles (1 mole), R is the gas constant (1.99 cal/mol·°C), T1 is the initial temperature (27 °C + 273 = 300 K), T2 is the final temperature (127 °C + 273 = 400 K), and P1 and P2 are the initial and final pressures, respectively (both 1 atm).
Substituting the values into the equation, we have:
V1 = (1 mol * 1.99 cal/mol·°C * 300 K) / (1 atm) ≈ 597 cal
V2 = (1 mol * 1.99 cal/mol·°C * 400 K) / (1 atm) ≈ 796 cal
Therefore, the work done by the piston is:
Work = 1 atm * (796 cal - 597 cal) = 199 cal
(b) The increase in internal energy of the gas can be calculated using the equation:
ΔU = n * C * ΔT
Where ΔU is the change in internal energy, n is the number of moles (1 mole), C is the molar heat capacity (7.03 cal/mol·°C), and ΔT is the change in temperature (127 °C - 27 °C = 100 °C).
Substituting the values into the equation, we have:
ΔU = 1 mol * 7.03 cal/mol·°C * 100 °C = 703 cal
(c) The heat supplied to the gas can be calculated using the equation:
Q = ΔU + Work
Substituting the values calculated in parts (a) and (b), we have:
Q = 703 cal + 199 cal = 902 cal
Since 1 cal = 4.184 J, the heat supplied to the gas is:
Q = 902 cal * 4.184 J/cal ≈ 3771 J
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Which law of thermodynamics does each of the following scenarios violate (if any)?
A machine that can turn 1000J of heat directly into 1000J of electricity
1.
The first law of thermodynamics
2.
The second law of thermodynamics
3.
The third law of thermodynamics
4.
It is allowed
Answer: The scenario violates the second law of thermodynamics.
Explanation: The second law states that heat cannot be converted into work without some loss of usable energy, and that the amount of usable energy in a closed system will always decrease over time. Therefore, the machine described in the scenario cannot exist because it would violate the second law by converting all of the heat into electricity without any loss of usable energy.
what is capasistanceb
\(\sf\huge\underline\pink{Answer:-}\)
Capacitance is the ratio of the change in the electric charge of a system, to the corresponding change in its electric potential.\(\rightarrow\)The capacitance of any capacitor can be either fixed or variable depending on their usage.
\(\rightarrow\)Capacitance is expressed as the ratio of the electric charge on each conductor to the potential difference (i.e., voltage) between them.
\(\rightarrow\)The capacitance value of a capacitor is measured in farads (F), units named for English physicist Michael Faraday (1791–1867).
\(\sf\large\underline\blue{Formula:-}\)
➢ \(\sf\green{q = CV}\)
Where,
\(\rightarrow\sf{q = charge}\)
\(\rightarrow\sf{C = capacitance}\)
\(\rightarrow\sf{V = voltage}\)
_______________________________
What is energy anything that takes up space and has mass a change in the position of an object a push or pull the ability to cause change in matter
Energy is that which has the ability to cause change in matter.
What is energy?Energy is the quantitative property that is transferred to a body or to a physical system, recognizable in the performance of work and in the form of heat and light. Energy is a conserved quantity—the law of conservation of energy states that energy can be converted in form, but not created or destroyed.
So in simple definition we can say that energy is that which has the ability to cause change in matter.
Based on the given statements we can classify them as;
anything that takes up space and has mass - matter.cause a change in the position of an object through push or pull - forcethe ability to cause change in matter - energy.Learn more about energy here: https://brainly.com/question/13881533
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