A student pushes horizontally on a book with a force of 2 N, which causes the book to slide at a constant velocity. What is the force of friction on the book?
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Related Questions
do you think it’s likely that there are other earth-like planets in our universe?
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Answer:
yes it's a matter of probability
Answer:
Absolutely!
Explanation:
Its almost impossible that we are the only goldilocks planet when there are billions of stars, each of them being suns with planets. Some other planet somewhere must be able to support life, don't you think?
a spring constant is 0.9 newtons per mm of deflection. an object is suspended from the spring, and a deflection of 1.8 mm is observed. if g = 9.81 m/sec2, what is the mass of the object in kg? chegg
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what is a gram used to measure
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Answer:
The gram is the basic unit of measurement
Explanation:
You use it to weigh small items such as sugar, flour, coffee, and other items that are similar.
If you want to measure in grams using a scale is the most accurate solution.
(have a nice day!)
if speed is the same for two planets, which planet has a longer orbit? PLSSS
HELP ME!!!
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Answer:
Pluto because is the farest away from the sun
I'LL MARK U BRAINLIST!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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hope this helps!
50 POINTS!
Write a paragraph that answers the questions below:
If there is a situation that would require a person to use self defense, what offensive strategies would you recommend they use?
What defensive strategies would you recommend they use?
Based on the videos, which move(s) look most effective for offense if there is a situation that would need self defense?
Based on the videos, which move(s) look most effective for defense if there is a situation that would need self defense?
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If a person is forced to utilize self-defense, the offensive techniques that should be recommended are as follows:
Take the initiative.I would advise them to employ the following defense strategies:
Keeping your head safeKeeping your elbow between you and the evil person.Based on the films, the move(s) that appear to be the most successful for the offense in a circumstance requiring self-defense are to target the problem rather than the person.
What is an offensive strategy?An aggressive competitive strategy is a form of company strategy that involves actively pursuing industry changes.
Companies that go on the offensive typically make acquisitions and invest extensively in R&D and technology in order to remain ahead of the competition.
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The north-pole end of a bar magnet is held near a stationary positively charged piece of plastic. How is the plastic affected?.
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When the north-pole end of a bar magnet is held near a stationary positively charged piece of plastic, it remains unaffected.
What is a bar magnet?
A bar magnet is made of ferromagnetic substance that produces
magnetic field.
What are the properties of a bar magnet?
Magnets attract ferromagnetic materials like iron, cobalt and nickel.Like poles repel each other and unlike poles attract each other.The strength of both poles is always the same.When a magnetic material is kept in contact with a bar magnet it acquires the magnetic property.Some materials like gold, silver and water get repelled by magnets.Since plastic is not a ferromagnetic material or any other material like gold and silver ,they remain unaffected in the presence of magnetic field.
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The projectile launcher shown below will give the object on the right an initial horizontal speed of 5.9 m/s. While the other object will be dropped with no initial speed. The objects are initially 179 cm above the ground and separated by 142 cm. What will be the difference in the landing locations of the two objects?
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Answer:
104.3 cm or 179.7
Explanation:
First find time that it takes for the object to hit the ground
\(\sqrt{(2H)/g} -> \sqrt{(2 x 179)/ 9.8} = 6.04s\\\)*
Then find xf of projectile \(xf= 5.9(6.04) = 37.7\\\\\)
not 100% sure if the projectile is going away from the object or towards it but you either do 142- 37.7 or 142+37.7
hope that helps
"217 cm" would be the difference throughout the landing locations of the two objects.
Given:
Initial horizontal speed,
v = 5.9 m/sHeight,
h = 179 cmBy applying equation of motion, we get
→ \(S = ut+\frac{1}{2}at^2\)
By substituting the values, we get
→ \(179\times 10^{-2}=0+\frac{1}{2}\times 9.8\times t^2\)
→ \(3.58= 9.8t^2\)
\(t^2 =\frac{3.58}{9.8}\)
\(t = \sqrt{0.36531}\)
\(= 0.61 \ s\)
now,
The horizontal distance travelled by the first particle will be:
→ \(d = v\times t\)
\(= 5.9\times 0.61\)
\(= 3.59 \ m\)
or,
\(= 359 \ cm\)
hence,
The distance between particle will be:
= \(d -142\)
= \(359-142\)
= \(217 \ cm\)
Thus the above approach is right.
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What are your controls?
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Answer:
A to jump
Explanation:
hope this helpes!
antangonists function by?
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Answer:7777
Explanation:
Answer:
Explanation:
An antagonist does the opposite of an agonist. It binds to receptors, and stops the receptor from producing a desired response.
A soccer player standing on a football field kicks a soccer ball off of the gound at the 10 yard line and it lands at the 30 yard line.
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To determine the horizontal distance covered by the soccer ball, we can subtract the initial position (10 yards) from the final position (30 yards).
Horizontal distance = Final position - Initial positionHorizontal distance = 30 yards - 10 yardsHorizontal distance = 20 yardsTherefore, the soccer ball covers a horizontal distance of 20 yards.
About soccer ballA soccer ball is a ball used in the game of soccer. In general, soccer balls are made of leather. In its development, the ball kicked by these players has undergone very significant changes.
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Briefly describe one major difference between hounshell’s and flink’s historical interpretations of mass production.
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A key difference between Hounshell’s and Flink’s historical interpretations of mass production is the fact around how Hounshell was said to have aided or supported the notion of mass production.
He was said to have called it a kind of creation of ethos that brings about a vital or important movement. In his view, he also said that that the mass production of large quantities is better for the people as they think about why there was only Henry Ford that is having this opportunity.
What is Hounshell view about?Hounshell in the year 1985 talk about his the American System movement to Mass Production
Hounshell interpretation mass production was the Henry Ford creation of the assembly line. The was said to have changed the way Americans produce industrial items.
Another key historical event or development in the timeframe of 1890 to 1945 that one can use to support Flink interpretation is the fact that there was mass migration to cities in this era. Due to industrialization, a lot of factories were said to needed people to fill their job positions.
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Blood flows through a coronary artery that is partially blocked by deposits along the artery wall. Through which part of the artery is the flux (volume of blood per unit time) largest? A. The narrow part B.The wide part C.Same in both
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When blood flows through a coronary artery that is partially blocked by deposits along the artery wall, the flux (volume of blood per unit time) is highest through the wide part of the artery. Therefore, the correct option is B.
The flux is a measurement of the flow of fluid per unit area over time. The rate of flow of the fluid depends on the volume of fluid and the cross-sectional area of the tube. Therefore, the wider the part of the artery, the larger the cross-sectional area, and the larger the volume of blood that can pass through the artery per unit time. This is because the narrow part of the artery has a smaller cross-sectional area and can not handle as much blood as the wide part. Hence, the flux is largest through the wide part of the artery. Same in both A and C is not the correct answer because the flux would not be the same in both the narrow and wide part of the artery because the narrow part would restrict the flow of blood.
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Rank the following capacitors on the basis of the dielectric constant of the material between the plates. Rank from largest to smallest. To rank items as equivalent, overlap them. A = 4 cm^2 C = 2 nF A = 2 cm^2 C = 4 nF A = 8 cm^2 C = 2 nF A = 2 cm^2 C = 8 nF A = 1 cm^2 C = 1 nF A = 4 cm^2 C = 1 nF
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On the basis of the dielectric constant of the material between the plates : A=2cm² C=8nF >A=2cm² C=4nF > A=1cm² C=1nF >A=4cm² C=2nF > A=4cm² C=1nF = A=8cm² C=2nF.
What is meant by dielectric constant ?The ratio of the electric permeability of material to the electric permeability of free space is called as dielectric constant (ϵr) and its value can be derived from a simplified capacitor model.
Dielectric constant of a substance is a measure of its ability to store the electrical energy and it is an expression of the extent to which material concentrates electric flux. Mathematically, dielectric constant can be said as the ratio of a material's permittivity to permittivity of free space.
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2. Using the same list of living things show how they could be classified into three groups.
Group 1 ________
Group 2 ________
Group 3 _________
Using the same list, show how they could be classified into four groups.
Group 1 ________
Group 2 ________
Group 3 _________
Group 4 __________
Please someone help as soon as possible.
and for this assignment group has have a different name while you are using these words in the picture.
oh almost forgot part 1 of this in the picture also.
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Answer:
Also, you could do this for the groups:
Group 1- creatures with scales
Group 2- creatures with fur
Group 3- creatures with feathers
For 4 groups you could possible do:
Group 1- no legs
Group 2- 2 legs with wings
Group 3- 2 legs without wings
Group 4- 4 legs
What is the weight or force exerted by an object on Earth’s surface whose mass is 75kg?
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Answer:
490 N/9.8 m/s² Answer: 3
Explanation:
Mass (m) = 75 kg Gravity (g) = 9.8 m/s/s 2. Force (F) = 490N Mass (m) = ? Gravity (g) = 9.8 m/s/s Formula: F = mg Formula: m = F/g Substitution: F = (75 kg)(9.8 m/s?) Substitution: m = 490 N/9.8 m/s² Answer: 3.
the total charge on each plate and the separation between the plated is held constant while the area of each plate is doubled. what happens to the electric field between the plates, the potential difference across the plates, ad the stored energy in the capacitor
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When the area of each plate is doubled while keeping the charge and separation constant, the electric field decreases, the potential difference remains the same, and the stored energy in the capacitor increases four times.
When the area of each plate of a capacitor is doubled while keeping the total charge on each plate and the separation between the plates constant, the following changes occur:
1. Electric Field: The electric field between the plates decreases. The electric field (E) between the plates of a capacitor is inversely proportional to the area (A) of the plates. As the area is doubled, the electric field is halved, assuming the other factors remain constant.
2. Potential Difference: The potential difference (V) across the plates remains the same. The potential difference across the plates of a capacitor depends on the charge (Q) and the capacitance (C), which is determined by the geometric and material properties of the capacitor. Since the total charge and separation between the plates are held constant, the potential difference remains unchanged.
3. Stored Energy: The stored energy in the capacitor increases four times. The energy stored in a capacitor (U) is directly proportional to the area of the plates (A). When the area is doubled, the stored energy is quadrupled (increases by a factor of four).
Therefore, when the area of each plate is doubled while keeping the charge and separation constant, the electric field decreases, the potential difference remains the same, and the stored energy in the capacitor increases four times.
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One force of magnitude 61 acts on an object. Another force of magnitude 92 acts on the object at a right angle, what is the magnitude of the resultant force on the object?
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Given:
The first force acting on the object is 61.
The second force acting on the object is 92.
The angle between two forces is 90.
The resultant force acting on the object is,
\(F=\sqrt[]{F^2_{1^{}}+F^2_{2^{}}+2F_1F_2\cos \theta}\)Substitute the known values,
\(\begin{gathered} F=\sqrt[]{(61)^2+(92)^2+2(61)(92)\cos 90} \\ =\sqrt[]{3721+8464+0} \\ =\sqrt[]{12185} \\ \approx110.4 \end{gathered}\)Thus, the resultant force acting on the object is 110.4.
17.
_______ energy is energy that is stored or waiting to be used.
Mechanical
Kinetic
Electrical
Potential
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If the speed of light in an unknown medium is 1.79x108 m/s, what is the index of refraction for that substance?
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Answer:1.68.
Explanation:The index of refraction of a substance can be calculated using the formula:
index of refraction = speed of light in vacuum / speed of light in the substance
The speed of light in vacuum is 3.00 x 10^8 m/s, and the speed of light in the unknown medium is 1.79 x 10^8 m/s.
index of refraction = 3.00 x 10^8 m/s / 1.79 x 10^8 m/s = 1.68
Therefore, the index of refraction for the unknown substance is 1.68.
In Problem 6, what is the acceleration of the electron? (Recall, F=ma. The mass of an electron is 9.11.103 kg. The answer will be a large number.)
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Answer:
Explanation:
And the condition of problem N 6 ???
the electric field of an electromagnetic wave points in the positive y direction. at the same time, the magnetic field of this wave points in the positive z direction. in what direction is the wave traveling?
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The direction is the wave traveling is in the X direction.
The path of propagation of the electromagnetic wave continually has a tendency to be perpendicular to the aircraft in which the electrical area (E) and magnetic field(B) lie.
Electromagnetic radiation consists of waves of the electromagnetic subject, which propagate through space and bring electromagnetic radiant strength. It includes radio waves, microwaves, infrared, light, ultraviolet, X-rays, and gamma rays. All of those waves shape a part of the electromagnetic spectrum.
Electromagnetic waves. Electromagnetic waves are invisible sorts of energy that travel via the universe. however, you may "see" a number of the outcomes of this strength. The light that our eyes can see is sincerely a part of the electromagnetic spectrum.
Electromagnetic waves vary from mechanical waves in that they no longer require a medium to propagate. because of this electromagnetic waves can travel no longer only through the air and stable substances but additionally through the vacuum of space.
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What is the kinetic energy
Answers
Answer:
energy which a body possesses by virtue of being in motion
Explanation:
A car can go from 0 m/s to 38 m/s in 4.5 seconds. If a net force of 6570 N acted on
the car, what is its mass
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The Mass of the car = 782.1 Kg
What is the mass of the car?The mass of the car is calculated as follows:
Mass = Force/ accelerationThe force on the car = 6570 N
The acceleration of the car, a = 38 - 0/4.5
acceleration = 8.44 m/s²
Mass of the car = 6570/8.44
Mass of the car = 782.1 Kg
In conclusion, the mass of the car is obtained from the acceleration and force on the car.
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radiation energy from the sun received at earth's poles is _____ that received at the equator, leading to winds that move heat towards the ______.
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Radiation energy from the sun received at the earth's poles is less than that received at the equator, leading to winds that move heat towards the poles.
The Radiation energy from the sun is received to a lesser extent on the poles than it is received on the equator. This causes winds that move heat toward the poles. The equator receives the most direct amount of light as compared to the poles because of the angles between the equator and the sun.
The temperature is warmer near the equator whereas as you move toward the poles, the temperature is comparatively cooler because that area gets lesser sunlight. So, the number of sunlight decreases as we go away from the equator
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N part c of the lab, when two wires are in series, so that current flows in opposite directions inside them, the directions of the magnetic fields in the region between the two wires are ______.
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When two wires are placed in series and current flows in opposite directions inside them, the magnetic fields generated by each wire will interact in the region between the two wires. According to the right-hand rule for determining the direction of a magnetic field, we can determine the directions of the magnetic fields in this scenario.
The right-hand rule states that if you point your thumb in the direction of the current flow, your curled fingers will indicate the direction of the magnetic field created by that current. In this case, since the current flows in opposite directions in the two wires, the magnetic fields will also be in opposite directions.
To be more specific, let's assume that wire A has current flowing from left to right and wire B has current flowing from right to left. If you place your right-hand thumb along wire A pointing towards the right, your curled fingers will wrap around wire A in a clockwise direction, indicating the direction of the magnetic field created by wire A. Conversely, if you place your right-hand thumb along wire B pointing towards the left, your curled fingers will wrap around wire B in a counterclockwise direction, indicating the direction of the magnetic field created by wire B.
Therefore, the magnetic fields in the region between the two wires will be in opposite directions. Wire A will create a clockwise magnetic field, while wire B will create a counterclockwise magnetic field.
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A test car and its driver, with a combined mass of 600 kg, are moving along a straight,horizontal track when a malfunction causes the tires to stop rotating. The car skids to a halt with constant acceleration, leaving skid marks on the road during the whole time it skids. Which two of the following measurements, taken together, would allow engineers to find the total mechanical energy dissipated during the skid?
A. The length of the skid marks
B. The contact area of each tire with the track.
C. The coefficent of static frction between the tires and the track.
D. The coefficent of static frction between the tires and the track.
Answers
Answer:
The two of the following measurements, when taken together, would allow engineers to find the total mechanical energy dissipated during the skid
B. The contact area of each tire with the track.
C. The co-efficent of static friction between the tires and the track.
D. The co-efficent of static friction between the tires and the track.
Explanation:
Is the field line pattern created by a magnetic dipole far from the source of the fields the same as the field line pattern created by an electric dipole?.
Answers
Both E and B as 1/\(r^{8}\) so with distance from dipole, they will be changing in same manner. Hence far from the source of the magnetic field they will have same pattern.
An item known as a magnetic dipole generates a magnetic field that is analogous to the field produced by a pair of north and south magnetic poles. Several events can produce a magnetic dipole. North/South pole pairs, such as in permanent magnets, closed current loops, like in solenoids, and naturally occurring magnetic dipoles, like electrons, are examples of magnetic dipoles. These processes all produce magnetic fields that are thought to act like magnetic dipoles and have very similar magnetic field line patterns. The magnetic field lines for north/south pole pairs are roughly the same as those produced by a bar magnet.
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Which kind of energy do flowing electrons have?
O A. Nuclear
B. Gravitational
C. Electrical
D. Elastic
Answers
Answer:
Gravitational
Explanation:
They are on the outside of a nucleus
Answer: C
Explanation: Electricity is basically the movement of electrons through a substance,
A book weighs 16 n and placed on a shelf that is 2. 5 m from the ground. What is the gravitational potential energy of the book
Answers
Answer: 40J
Explanation:
Gravitational potential energy is defined as the mass of the object, multiplied by the acceleration due to gravity, and the height from your arbitrary reference point. If we assume that the floor has a gravitational potential of zero, then the gravitational potential of the book on the shelf would be:
\(U=mgh\)
We were given the weight of the book, not the mass. In order to find the mass of the book, we need to divide the weight by the acceleration of gravity. We have that:
\(Mass=Weight/Gravity\)
\(Mass=16N/9.8m/s^2\)
\(Mass=1.63kg\)
Plug everything into the gravitational potential formula to get:
\(U=(1.63kg)*(9.8m/s^2)*(2.5m)\)
\(U=40J\)
The gravitational potential energy of the book placed 2.5 m above from the ground is 40 joules.
What is potential energy?The energy of the body due to its position with reference to some other body is called the potential energy of the two - body system.
Given is an object whose weight is 16 N placed on a shelf that is 2.5 m from the ground.
The weight of the book is -
W = mg = 16 N
The gravitational potential energy of the book will be -
E = mgh = 16 x 2.5 = 40 joules
Therefore, the gravitational potential energy of the book placed 2.5 m above from the ground is 40 joules.
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