The minimum coefficient of friction to avoid slippage of the coin is 0.23.
Minimum coefficient of friction
The minimum coefficient of friction can determined from the maximum speed of the coin.
ma = μmg
mv²/r = μmg
v²/r = μg
v² = μgr
μ = v²/(gr)
μ = (ωr)²/(gr)
μ = ω²r/g
μ = (7.95² x 0.035)/(9.8)
μ = 0.23
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Hi,i need this hurry and correctly please!!!,fake answers i report you.Thanks.
Step-by-step explanation:
Step 1: Formula
10.0 = Meters
800 = Newtons
4.0 = Centre of Gravity
Explanation in words (Short Form)
- We know all the formulas and that we are calculating the least force being applied. We know that balancing the pole at (A) with the weight of the gravity will equal more force at B times 10. So the answer will be 320 N because the B force will equal 3200. If we divide 3200 by 10. The answer will result as 320. So the final answer for this question is 320N
Answer:
Balancing the pole at A with the weight acting at the centre of gravity = 800(4) Force at B multiplied by 10 = 3200 divided by 10 equals 320N
= 320N
Hope this helps.
Determine the value of n so that the vectors A and B are perpendicular: Ā = î + 5j + nk and B = 2î - j + k
If [tex]\vec A[/tex] and [tex]\vec B[/tex] are perpendicular, then their dot product is zero. This means
[tex]\vec A \cdot \vec B = (\vec\imath + 5\,\vec\jmath + n\,\vec k) \cdot (2\,\vec\imath - \vec\jmath + \vec k) = 2 - 5 + n = 0[/tex]
Solving for n is trivial; it follows that n = 3.
What is the degree measure of angle bac? round to the nearest whole degree. 19° 20° 70° 71°
The degree measure of angle ∠ bac will be 70°. Option C is correct.
What exactly is an angle?The angle is the distance between the intersecting lines or surfaces. In addition, the angle is expressed in degrees. The angle is 360 degrees for a full revolution.
Given expression;
[tex]\rm cos^{-1}(\frac{3.4}{10})=x \\\\ x = cos^{-1}(0.34) \\\\ x = 70.12^0[/tex]
The degree measure of angle ∠bac will be 70°.
Hence option C is correct.
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Answer:
70 Degrees
Explanation:
Geometry B E2020!! :3
the magnitude of the electric potintial and of the electrolstatic force depend on which two factors
answer:
Distance and amount of charge
also:
size, type
Electrostatic force F=k Q q / r^2
It depends on
1. Charge on which force is acting.
2. Charge due to which force is acting
3. Distance between the two charges.
4. Material medium in which the charges are placed (eg air, water, oil etc)
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maitri goel
The distance between slits on a diffraction grating is 0.60
How large is the path difference?
mm, and one of the angles of diffraction is 0.30°. The
light forms a second-order bright band.
O 1047 nm
• 1571 nm
© 3142 nm
6284 nm
The path difference is 1.57 × 10⁻⁶ m
Distance is the amount of space between things. From distance, it is the hard to tell if someone's wearing the a vampire costume abd just a chic black outfit.
For constructive interference thai is formation of bright fringe through a diffraction grating is given by:
d sin θ = n λ
here, d is the distance between slits.
θ is the angle of diffraction
n is the order of fringe
and λ is the path difference.
λ = (d sin θ)/ n = (0.60 *10 ⁻³m) (sin 0.30°) ÷ 2 = 1.57 * 10⁻⁶ m
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Answer:
C is the answer
Explanation:
kepler’s second law of planetary motion states ""a line from a planet to the sun sweeps over equal areas in equal intervals of ____.""
Kepler's second law of planetary motion states, 'a line from a planet to the sun sweeps out equal areas in equal intervals of time.'
What are Kepler's laws of planetary motion?Kepler's three laws of planetary motion include
All planets orbit the sun in elliptical orbits with the sun as the focusA line from a planet to the sun sweeps out equal areas in equal intervals of timeThe square of the period of any planet is directly proprtional to the cube of the semi-major axis of its orbit.From the second law, we see that, a line from a planet to the sun sweeps out equal areas in equal intervals of time.
So, Kepler's second law of planetary motion states, 'a line from a planet to the sun sweeps out equal areas in equal intervals of time.'
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A metal block has a density of 5000 kg per cubic meter and a mass of 15,000 kg. What is its volume?
Taking into account the definition of density, the volume of the metal block is 3 m³.
What is densityDensity is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.
In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.
Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
[tex]density=\frac{mass}{volume}[/tex]
From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.
Volume of the metal blockIn this case, you know that:
Density= 5000 [tex]\frac{kg}{m^{3} }[/tex]Mass= 15000 kgVolume= ?Replacing in the definition of density:
[tex]5000 \frac{kg}{m^{3} } =\frac{15000 kg}{volume}[/tex]
Solving:
volume×5000 [tex]\frac{kg}{m^{3} }[/tex]= 15000 kg
volume= [tex]\frac{15000 kg}{5000 \frac{kg}{m^{3} }}[/tex]
volume= 3 m³
In summary, the volume of the metal block is 3 m³.
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Two particles having charges q,=0.700nc and q=9.00nc are separated by a distance of 1.40m. at what point along the line connecting the two charges is the total electric field due to the two charges equal to zero?
The point along the line connecting the two charges is the total electric field due to the two charges equal to zero will be 0.3056.
What is electric field strength?
The electric field strength is defined as the ratio of electric force and charge. The field's direction is determined by the direction of the force acting on the positive charge.
The megnitude of the electric field for charge 1 is;
[tex]\rm E_1 = (9 \times 10^9 )\times \frac{0.700 \times 10^{-9}}{x^2}[/tex]
The megnitude of the electric field for charge 1 is;
[tex]\rm E_2 = 9.0 \times 10^9 \times \frac{9.00 \times 10^{-9}}{(1.80-x)^2}[/tex]
The net electric field at point p is;
[tex]\rm \frac{0.700}{x^2} = \frac{9.00}{(1.40-x)^2} \\\\( \frac{1.40-x}{x} )^2 = \frac{9.00}{0.700} \\\\\ \frac{1.40-x}{x}=3.58 \\\\ \frac{140}{x} -1=3.58\\\\\ \frac{140}{x}=3.58+1\\\\ x=0.3056 \ m[/tex]
Hence, the point along the line connecting the two charges is the total electric field due to the two charges equal to zero will be 0.3056.
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what determines the velocity of an object
which statement is a scientific theory
A.most cells are so small that they can be observed only through a microscope
B.the interactions between cells can be predicted with mathematical equations
C.The various functions of different types of cells can be determined by experiments
D.cells are fundamental units of all living organisms
Most cells are so small that they can be observed only through a microscope is a scientific theory. Option A is correct.
What is a scientific theory?A well-considered explanation for observations of the natural world that has been developed through the scientific method and that combines numerous facts and hypotheses is known as a theory.
A scientific hypothesis states that most cells are so tiny that a microscope is the only way to see them.
Hence option A is correct.
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ubes have sides of equal lengths. What is the fastest way to measure the volume of a cube-shaped table?
measure the length, width, and height of the table, then multiply those numbers
measure one side with a ruler, and multiply that number by itself three times
measure one side with a ruler, and multiply that number by itself and then by
measure the length, width, and height of the table, then multiply those numbers by
The quickest technique to calculate the volume of a cube-shaped table is to use a ruler to measure one side, then multiply that figure by three. Option B is correct.
How do you calculate the volume of a cube?Assume the side length of the cube under consideration is L units. The volume of the cube is then equal to L³ cubic units.
The volume of a cube is;
V = L³
Ubes have equal-length sides. The quickest technique to calculate the volume of a cube-shaped table is to use a ruler to measure one side, then multiply that figure by three.
Hence option B is correct.
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Which of these is most likely consequence of failing petroleum prices
More sales of traditional, large cars are the most likely consequence of falling petroleum prices.
ExplanationSince the majority of conventional, large cars employ combustion engines, these engines need petroleum fuel to operate.
As a result, Choice C—more sales of conventional, large cars—is one of the effects of dropping oil prices that is most likely to occur.
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We see different phases of the Moon on Earth. How are the phases of the Moon proof of
the way we see the Moon?
Answer:
The Moon itself does not generate light
Explanation:
The Moon itself does not generate light; it is lit up by the Sun. As the Moon orbits the Earth, the portion of illuminated Moon that we see changes – giving rise to the phases of the Moon. Starting at the New Moon phase, the Moon appears to expand in illumination.
Number 5 and 6 i need just give answer
Explanation:
voltage = current × resistance
5.
12 V = 4.2 A × resistance
resistance = 12 V / 4.2 A = 2.857142857... Ohm
FYI :
4.2 A would be a lot for a small electronic device like a CD player. that would be 12×4.2 = 50.4 Watt, and the CD player would get really hot.
6.
120 V = current × 12 Ohm
current = 120 V / 12 Ohm = 10 A
help in solving this question please
(question is on the picture )
Answer:
Jesus
Explanation:
he is the way
A rocket weighing 300,000 N is taking off from Earth with a total thrust of
460,000 N at an angle of 20 degrees, as shown in the image below. What is
the approximate vertical component of the net force that is moving the rocket
away from Earth?
Explanation:
vertical force = 460,000 * sin(70) - 300,000
Fv = 187,717.75N
Identify each statement that describes a benefit of the scientific method. (Select all choices that apply)
Group of answer choices
a) It provides an answer to questions immediately.
b) It gives scientists a standardized way to approach a problem.
C) It gives scientists a common vocabulary for sharing information.
D) It reduces bias and judgment from personal experiences.
The statements that describe a benefit of the scientific method are as follows:
It gives scientists a standardized way to approach a problem. It reduces bias and judgment from personal experiences. It gives scientists a common vocabulary for sharing information.Thus, the correct options are B, C, and D.
What is the Scientific method?The scientific method may be defined as a strategy of research in which a problem is recognized, relevant data is collected, a conjecture is composed of this data, and the assumption is empirically tested to determine the outcome of particular research.
The scientific method never explains or provides an answer to any question immediately because it consists of a scripted format with certain parameters.
The scientific method uses the identical vocabulary for sharing information with one another in particular terminology.
Therefore, it is well described above.
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one of the most important features that must be explained by models during the formation of the galaxy is the ____.
One of the most important features that must be explained by models during the formation of the galaxy is the difference in age and metallicity of stars.
What is Metallicity of stars?This is defined as the proportion of heavy elements present in a star and they are usually heavier than hydrogen or helium.
These elements and the age of stars have to be put into consideration when discussing the formation of the galaxy.
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What observation method exposes people to frustrations, temptations, pressure, and boredom in a controlled environment, and is used for firearms training in police departments?
Virtual reality is the observation method that exposes people to frustrations, temptations, pressure, and boredom in a controlled environment, and is used for firearms training in police departments.
What is virtual reality?Virtual reality is an observation technique that is utilized in police agencies for weapons training. It exposes individuals to frustrations, temptations, pressure, and boredom in a controlled setting.
Police officers' psychophysiological reactions are impacted when participating in virtual reality weapons training exercises.
Electroencephalographic (EEG) and heart rate variability (HRV) measurements, as well as VR simulator performance metrics, are used as outcome measures.
In order to facilitate the design of a biocybernetic adaption layer that generates real-time modulations in simulation difficulty based on specific physiological responses, we propose a psychophysiological model.
Hence, virtual reality is the observation method that exposes people.
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which of the following is not a lever?
a. winch
b. scissors
c. can openers
d. tweezers
Answer:
a?
Explanation:yes it is a
You launch a model rocket that has a mass of 1.5 kg.At a height of 300m,it is traveling at 125 m/s.what is the kinetic energy at this point
Answer:
zero
Explanation:
Because if the object is not in motion then it only posseses potential energy not kinetic energy
A transverse wave that has electrical and magnetic properties is known as _________.
a. magnetism
b. loudness
c. electricity
d. electromagnetic energy
Answer:
D
Explanation:
the answer is D to me
the answer is D to me
what evidence would you expect to find on the moon if it had been subjected to plate tectonics? (select all that apply.)
Volcanoes and mountains are the evidences that show plate tectonics.
What evidence would you expect to find on the Moon if the Moon had been subjected to plate tectonics?The presence of volcanos and mountains are the evidences that provides information that the moon has plate tectonic. If there is no volcanoes and mountains on the moon then we can say that there is no plate tectonic on the moon.
So we can conclude that volcanoes and mountains are the evidences that show plate tectonics.
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What chemical is needed to produce energy and where is it stored?.
Answer:
chemical energy, Energy stored in the bonds of chemical compounds. Chemical energy may be released during a chemical reaction, often in the form of heat; such reactions are called exothermic
Explanation:
hope it will help you
3. A body accelerates constantly at 4m/s² from rest for a distance of 60m. a) How long did it take to reach a distance of 60m? [2] b) Calculate the velocity reached.
Answer:
will you mark brainliest.
A 50-kg block is at rest on a 15o slope. A force of 250 N is acting on the block up the slope parallel to it. If the block does not slide up the slope, what is the minimum value of the coefficient of static friction between the block and the slope
The minimum value of the coefficient of static friction between the block and the slope is 0.53.
Minimum coefficient of static frictionApply Newton's second law of motion;
F - μFs = 0
μFs = F
where;
μ is coefficient of static frictionFs is frictional forceF is applied forceμ = F/Fs
μ = F/(mgcosθ)
μ = (250)/(50 x 9.8 x cos15)
μ = 0.53
Thus, the minimum value of the coefficient of static friction between the block and the slope is 0.53.
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c) Use the table to explain how the masses of Objects 1 and 2 relate to the gravitational force
between them. Be sure to:
Describe the scenario.
DExplain the table headings to introduce the data in the table.
Use the data to show a trend.
Summarize the information from the table in a sentence, showing the relationship between
the masses of objects and the gravitational force between the objects.
Use the table to explain how the masses of Objects 1 and 2 relate to the gravitational force between them the power of the gravitational pressure among gadgets relies upon on factors, mass and distance. the pressure of gravity the loads exert on every other.
How do the loads of items 1 and a couple of relate to the gravitational pressure among them?Gravitational pressure -an appealing pressure that exists among all items with mass; an item with mass draws every other item with mass; the value of the pressure is immediately proportional to the loads of the 2 items and inversely proportional to the rectangular of the gap among the 2 items.
Since the gravitational pressure is immediately proportional to the mass of each interacting items, greater large items will entice every different with a more gravitational pressure. So because the mass of both item increases, the pressure of gravitational appeal among them additionally increases.
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Describe the mass of the reactants and products given in the balanced chemical equation
When the chemical response is balanced, the mass of the reactant is equal to the mass of the reactant.
Grounded on the law of Conservation of Mass
We balance the chemical equation since tittles aren't destroyed in the process and the mass is conserved. The mass of the reactant is equal to the mass of the product. No new titles are created or destroyed, there was only rearrangement or regrouping of tittles. This also means the number of titles of rudiments in both the product and reactant is equal.
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The phenomenon of water sticking to a surface, such as a window pane or
plant, is due to the water's____. A. cohesion
B. corrosion
C. obtrusion
D. adhesion
Answer:
Because of the Cohesion
If a sound increases 5 db, the sound becomes _______ times louder.
a. five
b. ten
c. three
d. fifteen
Answer:
If a sound increases 5 db, the sound becomes three times louder.
Explanation:
