m=2kg
F=25N
α=30°
d=20cm
μ=0.2
W=?
Answers
w=f÷d
w=25÷20
w=1,25
therefore w=1,25
Related Questions
On the graph of voltage versus current, which line represents a 3.0 ohm
resistor?
Will give brainliest
Answers
Answer:
D. Graph A
Explanation:
Ohm's law states that V = I*R
So rearrange the equation by dividing the Volts by the amps to give you resistance.
R = 12/4
R = 3 ohm
The line in graph of voltage versus current, which represents a 3.0 ohm
resistor is line A. The correct option is D.
What is current?The current is the stream of charges which flow inside the conductors when connected across the end of voltage.
Given, the graph of voltage versus current is given.
From the graph, I = 4A and V= 12 V
From the Ohm's law, V =IR
Resistance, R = V/I
By substituting the values, we get
R = 12/4
R= 3 ohms
The resistance of the circuit, 3 ohm is represented by the line A on the graph.
Thus, the correct option is D.
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what two things does the strength of gravity depend on?
Answers
Answer:
i found this i hope it helps
Explanation:
The magnitude of this force depends upon the mass of each object and the distance between the centers of the two objects. Mathematically, we say the force of gravity depends directly upon the masses of the objects and inversely upon the distance between the objects squared.
PLEASE HELP
which of the following graphs show the direct relationship between mass and force?
Answers
Answer:
Option 2!
Explanation:
According to F = ma, force increases as mass increases. (Assuming acceleration is constant.)
What does an element's group number tell you about an element's chemical and physical properties ?
Answers
for example; the group 15 ( nitrogen family ),
The valence shell ( outermost shell ) electronic configuration of is ns2np3 , which clearly shows that all the elements have the tendency to make same kind if bonds with a common element.
That is, consider the hydrates of the group, it is NH3 ( ammonia ),PH3 (phosphine ), AsH3 (arsine ) , SbH3 ( stibine ) etc. They are having the same chemical formula and same type of bond (covalent bond )
The physical properties include melting point, boiling point, density etc.
Here for the same nitrogen family, all elements except nitrogen are solids in room temperature whereas nitrogen is gas.
Question: Why do you think the door opens, even if it is pushing back at equal force?
Answers
what does alcohol changing radio stations or talking on a cell phone do to your reaction time
Answers
They make you have a slower reaction time
Una niña tira de un carrito por medio de una soga. Si realiza una fuerza de 10 N qué forma un ángulo de 30° con la dirección de desplazamiento. ¿Qué trabajo hace al desplazar 300cm?
Answers
Answer:
El trabajo realizado por la niña es 25.9 J.
Explanation:
El trabajo ue hace la niña viene dado por:
\( W = |F|*|d|*cos(\theta) \)
En donde:
F: es la fuerza realizada = 10 N
d: es el desplazamiento = 300 cm
θ: es el ángulo entre la fuerza y el desplazamiento = 30°
Entonces, el trabajo es:
\( W = |F|*|d|*cos(\theta) = 10 N*3 m*cos(30) = 25.9 J \)
Por lo tanto, el trabajo realizado por la niña es 25.9 J.
Espero que te sea de utilidad!
Un globo sonda de 155 L de volumen a 1 atm se deja subir a una altura de 6 Km, donde la presión es de 0,8 amt. Suponiendo que la temperatura permanece constante, ¿Cuál es el volumen final del globo?
Answers
Answer:
El volumen final del globo es 193.75 L.
Explanation:
La ley de Boyle establece que “El volumen ocupado por una determinada masa gaseosa a temperatura constante, es inversamente proporcional a la presión”
La ley de Boyle se expresa matemáticamente como: P*V=k donde k es una constante.
En esta ley entonces se relacionan dos variables: presión y volumen, por lo que se asume que la temperatura del gas y el número de moléculas del gas son contantes.
Ahora es posible suponer que tienes un cierto volumen de gas V1 que se encuentra a una presión P1 al comienzo del experimento. Si varias el volumen de gas hasta un nuevo valor V2, entonces la presión cambiará a P2, y se cumplirá:
P1*V1=P2*V2
En este caso:
P1= 1 atmV1= 155 LP2= 0.8 atmV2= ?Reemplazando:
1 atm* 155 L=0.8 atm*V2
y resolviendo se obtiene:
\(V2=\frac{1 atm*155 L}{0.8 atm}\)
V2= 193.75 L
El volumen final del globo es 193.75 L.
will give brainlist 20 points
Answers
Answer:
I think its uniform I dont really know
What is the force of gravity (in Newtons) acting between the Earth and a 5-kg bowling ball that is resting on the surface of the Earth
Answers
Answer:
49.07 newtons is the answer
A 15.0 cm object is 12.0 cm from a convex mirror that has a focal length of -6.0 cm. What is the height of the image produced by the mirror?
–5.0 cm
7.5 cm
-7.5 cm
5.0 cm
Answers
Answer:
-7.5
Explanation:
edge 2021
Calculate the strength of an electric current when 20 Coulomb of charge flows past a certain point
in 5 seconds. Show all calculations.
Answers
When 20 Coulomb of charge flows past a certain point in 5 seconds. The strength of an electric current will be (I)= 4A
What is electric current?When a battery is connected in a wire there is a electron flow from negative to positive portal. To maintain the value there is a flow which flows from positive to negative portal and help the light to glow that called the electric current. It can be measured in Ampere.
How can we calculate the electric current?To calculate the electric current we are using the default formula of electric current that is, I=Q/t
Here we are given,
Q= The charge of the electric structure. = 20C.
t= The time being the current is flowing. = 5S.
We have to calculate the strength of an electric current= I
Now we put the values in the known equation, we get,
I=Q/t
Or, I=20/5
Or, I=4A
From the above calculation we can say that, the strength of an electric current will be (I)= 4A
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Study the image of two waves traveling at the same speed through the same medium.
Which of the following choices most accurately discusses the amplitudes and wavelengths of the two waves?
The two waves have the same wavelength because the height of each wave is the same. The blue wave has a greater frequency because it crosses the x axis at a later point than the black wave.
The two waves have the same amplitude because the height of each wave is the same. Both waves have the same wavelength because the distance between two crests is the same. The waves are slightly shifted, or out of phase.
The two waves have the same amplitude because the height of each wave is the same. The blue wave has a greater wavelength because it crosses the x axis at a later point than the black wave. The waves are slightly shifted, or out of phase.
The two waves have the same amplitude because the distance between two crests is the same. The two waves have the same wavelength because the height of each wave is the same. The waves are slightly shifted, or out of phase.
Answers
The correct description is that the two waves have the same amplitude, the same wavelength, and are slightly shifted or out of phase.
The two waves have the same amplitude because the height of each wave is the same. Both waves have the same wavelength because the distance between two crests is the same. The waves are slightly shifted, or out of phase.
The image shows two waves with the same amplitude, which can be observed by comparing the heights of the waves. Additionally, the distance between two consecutive crests (or troughs) of each wave is the same, indicating that both waves have the same wavelength.
The description of the waves being slightly shifted, or out of phase, suggests that the peaks and troughs of the waves do not align perfectly. This can be seen in the image where the blue wave appears to be slightly ahead or behind the black wave. This phase shift can occur due to various factors, such as the waves originating from different sources or encountering different obstacles in their paths.
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A satellite 575 km above the earth's surface transmits sinusoidal electromagnetic waves of frequency 92.4 MHz uniformly in all directions, with a power of 25.0 kW. (a) What is the intensity of these waves as they reach a receiver at the surface of the earth directly below the satellite? (b) What are the amplitudes of the electric and magnetic fields at the receiver? (c) If the receiver has a totally absorbing panel measuring 15.0 cm by 40.0 cm oriented with its plane perpendicular to the direction the waves travel, what average force do these waves exert on the panel? Is this force large enough to cause significant effects?
Answers
a. The intensity of these waves as they reach a receiver at the surface of the earth directly below the satellite is 1.39 x 10^-12 W/m^2
b. The amplitudes of the electric and magnetic fields at the receiver are 1.40 x 10^-5 V/m and 3.73 x 10^-8 T
c. The force exerted by electromagnetic waves on a surface is 3.32 x 10^-11 N
(a) The intensity of electromagnetic waves decreases with distance according to the inverse square law, which states that the intensity is inversely proportional to the square of the distance. The distance between the satellite and the receiver is the sum of the radius of the Earth and the altitude of the satellite, which is:
d = 6,371 km + 575 km = 6,946 km
The intensity of the waves at the receiver is given by:
I = P/4πd^2
where P is the power of the waves. Substituting the given values, we get:
I = 25.0 kW / (4π(6,946 km)^2) = 1.39 x 10^-12 W/m^2
(b) The electric and magnetic fields of the waves can be related to the intensity by the equation:
I = 1/2 ε0 c E^2 = 1/2 μ0 c B^2
where ε0 and μ0 are the electric permittivity and magnetic permeability of free space, respectively, and c is the speed of light. Solving for E and B, we get:
E = sqrt(2I/ε0 c) = 1.40 x 10^-5 V/m
B = sqrt(2I/μ0 c) = 3.73 x 10^-8 T
(c) The force exerted by electromagnetic waves on a surface is given by the radiation pressure equation:
F = (2I/c) A
where A is the area of the surface and c is the speed of light. Substituting the given values, we get:
F = (2 x 1.39 x 10^-12 W/m^2 / 3.00 x 10^8 m/s) x (0.15 m x 0.40 m) = 3.32 x 10^-11 N
This force is very small and is unlikely to cause any significant effects on the absorbing panel.
Note: In the calculations, the wavelength of the waves is not needed, as the frequency is given and the waves are assumed to be sinusoidal.
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6.1x10^-4 in expanded form
Answers
Answer:fghkigf
Explanation:gbjyfd
A small child weighs 18 kg. If his mom left him sitting on top of the stairs, which are 10m high, how much energy does the child have?
Answers
Explanation:
Find an energy is E=mgh, so E=18*10*10=1800J
if both the graph representing the constant net force and the graph representing the variable net force represent the same impulse acting on the baseball, which geometric properties must the two graphs have in common?
Answers
The impulse acting on an object is equal to the change in momentum it experiences. When we talk about net force, we're really talking about the rate at which momentum is changing. A constant net force means that momentum is changing at a constant rate, while a variable net force means that momentum is changing at a changing rate.
Now, if both graphs represent the same impulse acting on the baseball, it means that they both represent the same change in momentum. This tells us that the area under both graphs must be the same. This is because the area under a force-time graph represents the impulse experienced by an object.
So, in terms of geometric properties, the two graphs must have the same area under them if they represent the same impulse acting on the baseball. This holds true whether the net force is constant or variable.
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what is the capital of Ghana and also Togo.
Answers
Lomé is the capital and largest city of Togo. Accra is the capital of Ghana.
Answer:Ghana - Accra Togo - Lomé I hope this helps mark me brainlist
Explanation:
Accra is the Capital of Ghana
Accra was founded in the 17th century by the Ga people. It became the capital of the British Gold Coast in 1877 and the capital of Ghana on the formation of the country as an independent state in 1957
Accra Is the Second Most Expensive City in Africa
Accra is known for its colorful textile and used or second-hand clothing markets. Located inside the Makola Market, Kantamanto is the largest trading point in all of Accra.
The capital of Togo is Lomé
Lomé, city, capital of Togo. Lomé lies on the Gulf of Guinea (Atlantic coast) in the extreme southwestern corner of the country. Selected as the colonial capital of German Togoland in 1897, it became important as an administrative, commercial, and transport centre.
It is also the country's chief port, from where it exports coffee, cocoa, copra, and oil palm kernels- Lome
Lomé was founded by the Ewe, an indigenous ethnic group, in 1880. Located on the southwestern Atlantic coast of Togo, Lomé has a long history of trade. In 2000, an estimated 900,000 people resided in Lomé. Europe's “Scramble for Africa” began in 1880.
What line of code will call force with a value of 10 for mass and a value of 9.81 for acceleration?
Answers
Line of code will call force with a value of 10 for mass and a value of 9.81 for acceleration is force(10, 9.81).
Line of code for force and accelerationIn mechanics, acceleration refers to the rate at which an object's velocity with respect to time varies.Acceleration is a vector quantity (in that they have magnitude and direction).The direction of an object's acceleration is determined by the direction of the net force acting on it. Newton's Second Law states that the combined effect of two factors determines how much an item accelerates.The size of the net balance of all external forces acting on the object is, in accordance with the materials used to create it.It inversely proportional to its mass, whereas the magnitude of the net resultant force is directly proportional to the net force.def force(mass, acceleration):
force_val = mass*acceleration
return force_val
10 is assigned to mass and 9.81 is assigned to acceleration
def force(10, 9.81)
So, Line of code will call force with a value of 10 for mass and a value of 9.81 for acceleration is force(10, 9.81).
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The A has a mean lifetime of 26 10-10s and decays into p + e- + ve with a branching fraction of 83 10-4. The A+ (udc) has a mean lifetime of 2-1 10-13s. Estimate the branching fraction of the A into A+e+ +ve, comment on how your result compares with the measured value. [m()=2285GeV/c2BR(e+ve)=(2106)%]
Answers
The mean lifetime of A is given by τ(A) = 26 × 10⁻¹⁰ s. The A decays into p + e⁻ + ve with a branching fraction of BR(A → p + e⁻ + ve) = 83 × 10⁻⁴.The mean lifetime of A⁺ (udc) is given by τ(A⁺) = 2-1 × 10⁻¹³ s.
The branching fraction of A into A⁺ + e⁺ + ve is given as follows: First, we can calculate the decay constant for A.λ = (1/τ) = (1/26 × 10⁻¹⁰) s⁻¹.The half-life of A is given by t₁/₂ = ln(2) / λ = (ln2 × τ) = 2.667 × 10⁻¹⁰ s. The branching fraction of A → A⁺ + e⁺ + ve is given as follows: BR(A → A⁺ + e⁺ + ve) = 1 - BR(A → p + e⁻ + ve) = 1 - (83 × 10⁻⁴) = 0.99917.
The measured value of the branching fraction of A → A⁺ + e⁺ + ve is BR(e+ve) = 2106 %.This is greater than 100%. Therefore, the value must be a typographical error. The correct percentage is probably 21.06%.The estimated branching fraction of A → A⁺ + e⁺ + ve is 99.917%, which is very close to 100%. This implies that the A mainly decays into A⁺ + e⁺ + ve.
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when are Waves produced
Answers
Answer:
Waves are caused by wind, or are created by the friction between wind and surface water
Explanation:
In the reaction below, how would adding more of product C affect the equilibrium of the system? (2 points) A + B ⇄ C + D Group of answer choices Shift it to the right toward the products. Shift it to the left toward the reactants. Equally create more products and reactants. It would have no effect.
Answers
Answer:
identify the action reaction force in the following cases
a boy walking on the ground
firing a bullet from the gun
a book lying on the table
a boy swimming in the swimming pool
launching of a rocket from the earth surface
Answer:
A Shift it to the right towards the products
Explanation:
If more reactants or products are added to a reaction system at equilibrium, the equilibrium will shift away from what was added to lower its concentration. If a reactant or product was removed from a reaction system at equilibrium, the equilibrium systems will shift to replace some of what was removed.
how many joules are required to raise the temperature of a 35.0 g sample of iron from to iron has a specific heat of 0.450 j/g °c
Answers
It would require 157.5 joules of energy to raise the temperature of a 35.0 g sample of iron by 10.0°C
To calculate the amount of energy (in joules) required to raise the temperature of a substance, we can use the equation:
Q = m * c * ΔT
where;
Q = energy in joules
m = mass in grams
c = specific heat capacity in J/g°C
ΔT = change in temperature in degrees Celsius.
In this case, the mass of the iron sample is 35.0 g, and the specific heat of iron is 0.450 J/g°C. The change in temperature (ΔT) is not provided in the question, so let's assume a hypothetical value of 10.0°C.
Using the formula, we have:
Q = (35.0 g) * (0.450 J/g°C) * (10.0°C)
= 157.5 J
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quit my nose so you have a bad guy really good guy
Answers
Answer:
hmmmmmmmmmmmmmmm
yes.
A student leaves their history classroom and walks 20 meters north to a drinking fountain. Then the student turns and walks 50 meters south to their art classroom. What is the magnitude of the total distance traveled by the student?
a. 20 m
b. 30 m
c. 50 m
d. 70 m
Answers
Answer:
D
Explanation: Given that a student leaves their history classroom and walks 20 meters north to a drinking fountain. Then the student turns and walks 50 meters south to their art classroom.
The distance is a scalar quantity.
The distance = 50 + 20
distance = 70 metres
Therefore, the magnitude of the total distance traveled by the student is 70 metres. Which is option D
density of certain liquid is2.4 g/cc. calculate the mass of 100cc of such liquid
Answers
Answer:
Explanation:
Density = mass / volume
density = 2.4
volume = 100 cm^3
2.4 = m / 100 Multiply both sides by 100
2.4 * 100 = m
m = 240 grams
1. A limiting factor for using nuclear energy is the
produced
O A. flooding
O B. pollution
O C. waste
O D. heat
Answers
Answer:
waste
Explanation:
took da test. nhgvgg
Sound waves travel at a speed of 330.0 m/s . How long does it take for the sound of thunder to travel 1.5 km ? (20points)
Answers
4.55 seconds
Step-by-step explanation:-Given, Speed = 330.0 m/s
To find the time, it will take for the sound of thunder to travel 1.5 km, we have to apply the formula for speed :
\(speed = \frac{distance}{time} \)
This implies that:-
\(time = \frac{distance}{speed} \)
So, Let's get started with the steps -
Step 1- Convert 1.5 km to metres.
\(1.5 \: km \: \\ = > \: 1.5 \times 1000 \\ = > 1500 \: m\)
Step 2- Now, to get time, substitute the values you got now in "time=distance/speed"
\(t = \frac{1500}{330}\)
\( => t = 4.55 \: seconds\)
Therefore, the answer is 4.55 seconds
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lan holds a magnet a few centimeters away from a pile of metal washers. The magnetic force on
the washers is strong enough that they slide across the table towards the magnet.
How could lan decrease the magnetic force on the washers?
Answers
lan can decrease the magnetic force on the washers by increasing the distance between the magnet and the pile of metal washers.
What is a magnet?A material or object that creates a magnetic field is called a magnet.
The most noteworthy characteristic of a magnet, a force that pulls on other ferromagnetic elements like iron, steel, nickel, cobalt, etc., as well as the ability to attract or repel other magnets, is caused by this invisible magnetic field.
The strength of the magnetic force produced by a magnet increases when the distance between the magnet and an object experiencing the magnetic force is reduced.
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Which part of earth contains frozen water?
Answers
Answer:
hydrosphere u welcome
Answer:cryosphere
Explanation:cryosphere: the part of Earth consisting of frozen water
The cryosphere is an all-encompassing term for those portions of Earth's surface where water is in solid form, including sea ice, lake ice, river ice, snow cover, glaciers, ice caps, ice sheets, and frozen ground.