The magnitude of resultant force is 15 N to the south. The result is obtained by adding up the forces inline.
What is force?Force is a push or pull acting on an object as a result of interaction between the object and another.
The forces that are inline can be added up. The force that has the opposite direction is negative.
A tree stump is pulled northward by a 10-n force and at the same time a 25-n force pulls it southward. Find the magnitude of resultant force!
Let's say that the northward force is positive, then the southward force is negative.
We have
F north = 10 NF south = - 25 NThe magnitude of the resultant force is
F = F north + F south
F = 10 + (-25)
F = -15 N
The minus sign indicates that the force is in south direction.
Hence, the tree stump is pulled with the resultant force of 15 N to the south.
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while the woman is repairing a leaky pipe under her kitchen sink, she looks at close objects through the upper half of her bifocal lenses. what is the closest object that she can see clearly?
Thus the closest object that the woman should be able to see while looking through the upper part of the bifocal lens would be the object that lies between 25cm of the lens.
Bifocal spectacles are specs which are created of both convex and concave lens. The upper part is made up of the concave lens while the lower part consists of convex lens.
When looking through the upper part of the bifocal lens the objects at a little distance become clearer as the upper part of bifocal lens consists of diverging lens that is used to correct distant or vision at some distance.
There are two types of lens the converging or convex lens and the diverging lens or concave lens.
Convex lens is called the converging lens as a two parallel rays of light when passing through a convex lens get bent towards each other and converge at some point.
Concave lens is called the converging lens as two parallel rays on passing through the concave lens get diverged from each other.
The clearest image that is formed by a concave lens is when the object lies between the focal point and the lens, where the image is formed at the focal point on the image side of the lens.
Thus the closest object that she would be able to see is the object that she would be able to see clearly would be the object that lies between 25cm of the lens.
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what thing is that if you broke it only it work???
Redox reactions include which types of reactions?
A. Single-replacement, double-replacement, acid-base, synthesis
B. Single-replacement, synthesis, decomposition, combustion
C. Acid-base, decomposition, double-replacement, synthesis
O D. Double-replacement, combustion, synthesis, decomposition
Answer:Single-Replacement, synthesis, decomposition, combustion.
Explanation:
Had to get it wrong to find out
Redox reactions include Single-replacement, synthesis, decomposition, composition Reactions. Hence option B is correct.
What is redox reaction ?Redox reaction is type of reaction in which oxidation number participating molecules changes. Redox reaction involves two types of the reaction oxidation and reduction. these two reaction take place simultaneous. Oxidation is the loss of electrons and reduction is the gain of electrons.
Oxidation is nothing but addition of oxygen and loss of hydrogen and reduction is loss of oxygen and gain of hydrogen.
Redox reactions include Single-replacement, synthesis, decomposition, composition Reactions.
The oxidation half-reaction is: H₂ → 2H⁺ + 2e⁻
The reduction half-reaction is: F₂ + 2e⁻ → 2F⁻
Hence option B is correct.
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A person is riding a skateboard on a U-shaped ramp. At which point does the person have the greatest potential energy?(1 point)
on the downswing as the person is dropping into the ramp
on the downswing as the person is dropping into the ramp
at the top of the ramp before dropping in
at the top of the ramp before dropping in
in the middle of the ramp at the lowest point
in the middle of the ramp at the lowest point
on the upswing as the person is coming up the other side of the ramp
Answer:
at the top of the ramp before dropping in
Explanation:
Potential energy is basically the build up of energy before it's released.
find the resultant of the following forces (i) 10 N along x-axis
The resultant force due to the cumulative forces acting on the body is 6i+6j N.
Force is a vector quantity and the direction in which they act affects the total magnitude of force. A vector quantity has both magnitude and direction.
And to add a vector one needs to take account of the direction as well.
The force acting on the body can be written as follow:
1. 10N along x-axis ---- 10i
2. 6N along y-axis ---- 6j
3. 4N along negative x-axis ----- -4i
The resultant force is the sum of the above vector:
10i +6j + (-4i) = 6i+6j N
The magnitude of the total force is
\(\sqrt{6^2+6^2}\\ =\sqrt{36+36}\\ =\sqrt{72}=6\sqrt{2} N\)
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The complete question is:
Find the resultant of the following forces
(i) 10 N along the x-axis
(ii) 6 N along the y-axis
(iii) 4 N along the negative x-axis
What is the minimum length of time water must remain motionless in service lines prior to first-draw residential lead sampling?
a) 2 hours
b) 4 hours
c) 6 hours
d) 8 hours
The recommended minimum length of time that water should remain motionless in service lines prior to first-draw residential lead sampling is 6 hours.
Lead can leach into drinking water from the service lines and plumbing fixtures, particularly in older homes that may have lead pipes or lead-based solder. When water sits stagnant in these pipes for a period of time, such as overnight or during the day when no one is home, the lead particles that have accumulated in the plumbing system can dissolve into the water. This is why it's important to collect first-draw samples after a period of stagnation.
The EPA recommends a 6-hour stagnation period for collecting first-draw samples from residential plumbing systems because this is typically the longest period of time that water remains stagnant in home plumbing systems. This means that the water has been sitting in the pipes long enough to allow any lead particles to leach into the water, but not so long that the water quality may be affected by other factors, such as microbial growth or chemical reactions.
It's important to note that first-draw samples are used to identify the presence of lead in the plumbing system, but they may not be representative of the actual exposure to lead that a person may experience. This is because the lead concentration in the water can vary depending on factors such as the age and condition of the plumbing system, the water chemistry, and the length of time that water has been sitting in the pipes.
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Please Help!
A girl preformed 50 j of work lifting a heavy box it took her 5 seconds to life the box. What was her power?
A. 45 W
B. 50 W
C. 10 W
D. 250 W
Explanation:
Power is change in energy over time.
P = (50 J) / (5 s)
P = 10 W
Answer: C
Explanation:
For this problem, we must divide.
50 ÷ 5 = 10
The answer to the question is 10
9. A car of 1200 kg is rolling down a hill. When the car reaches a momentum of 7800 kg
m/s, what is its velocity?
Answer:
V = p/m = 7800/1200 = 6.5m/s
Explanation:
Most of the radiation released from the failed nuclear reactor was from fission products.a. Trueb. False
The fission products iodine-131, cesium-134, and cesium-137 made up the majority of the radiation produced by the failed nuclear reactor. Iodine-131 is rapidly consumed through the air and has a tendency to localize in the thyroid gland, despite having a half-life of only eight days, according to UNSCEAR.
Does radiation come from nuclear fission?
Atoms split apart during nuclear fission, releasing energy in the process. Nuclear fission is used in all nuclear power reactors, and uranium atoms are used in the majority of them. In the process of nuclear fission, a neutron splits a uranium atom after colliding with it, releasing a significant quantity of energy in the form of heat and radiation.
If a fission reactor malfunctioned, what would happen?
Because of the potential for radioactive elements to escape from all containment and enter the environment, causing radioactive pollution and fallout and perhaps poisoning nearby people and animals, a meltdown is thought to be extremely severe.
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What did astronomers expect might cause the expansion of the universe to slow down?
a. The gravitational pull of all the matter in it
b. Being very old
c. Friction
d. Running out of energy
e. None of the above
Astronomers expected that the expansion of the universe might slow down due to Option a. the gravitational pull of all the matter in it.
Astronomers initially expected that the gravitational pull of all the matter in the universe would cause the expansion of the universe to slow down. This is because the gravitational force of matter pulls objects towards each other, and thus would be expected to slow down the expansion of the universe. However, later observations showed that the expansion of the universe was actually accelerating, rather than slowing down.
To account for this unexpected acceleration, astronomers introduced the concept of dark energy, which is a mysterious force that is thought to be causing the acceleration of the universe's expansion. Dark energy is believed to be a property of space itself, and it is thought to make up about 68% of the total energy density of the universe. The nature of dark energy is still not well understood, and it remains one of the biggest mysteries in modern physics.
In summary, while astronomers initially expected that the gravitational pull of matter in the universe would cause the expansion of the universe to slow down, later observations showed that the expansion is actually accelerating due to the mysterious force of dark energy. Therefore, Option A is Correct.
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An isolated conducting rod of length 8.00 cm is oriented parallel to the x-axis. it moves in the y-direction at 3.90 m/s in the presence of a uniform magnetic field of magnitude 0.600 t that points in the -z-direction. find the magnitude of the motional emf in the rod.
The magnitude of the motional emf in the rod is 0.1872 when an isolated conducting rod of length 8.00 cm is oriented parallel to the x-axis. The speed of rod in y-direction is 3.90m/s.
Given an isolated conducting rod of length (l) = 8.00 cm = 8x10-2m
it moves in the y-direction at (v) = 3.90 m/s
uniform magnetic field of magnitude (B)= 0.600T
Let the magnitude of the motional emf in the rod be E
We know that E = BxlxV
E = 0.600T x 3.90m/s x 8x10-2m = 18.72x10-2
Hence the magnitude of the motional emf in the rod is 0.1872
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a jet can travel at 350 m/s.
calculate how far it will travel in :
a) 30 secs
b) 5mins
c) half an hour
Explanation:
distance = speed x time
a- d= 350 m/s x 30s
d= 10500m
b- 5 mins = 300 sec
d= 350 m/s x 300s
d= 105000 m
c- 30 mins = 1800 sec
d= 350 m/s x 1800 s
d= 630000 m
a sound bridge is a. a lightweight frame for quickly moving a microphone above the action while filming on location. b. boosting the volume of the music to make it more prominent than the voices or sound effects. c. transferring a sound from one channel to another in multichannel recording. d. overlapping the sound of one scene into the next.
A sound bridge is a d) overlapping the sound of one scene into the next
Sound bridging is an editing technique used to transition through sound from one scene to another. sound bridges, also known as audio bridges, allow filmmakers to enter and exit scenes by filling the gaps with audio. An audio bridge will connects two scenes, allowing the audio of the subsequent scene to play over the previous scene before showing the next shot. The technique used to accomplish this is known as J-cut.
There are different types of sound bridge namely
Dialogue sound bridgeSound effect sound bridgeMusic sound bridgeLearn more about the audios in
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Do all waves travel at the same speed in different materials
No, not all waves move through various materials at the same pace. The characteristics of the medium itself, the kind of wave, and the frequency of the wave are only a few of the variables.
that affect how quickly a wave moves through a given medium. Sound waves, for instance, go through various materials at varying rates, depending on the density and elasticity of the medium. In general, solids transmit sound more quickly than liquids or gases do. Similar to how sound waves go through various materials at various rates, depending on the refractive index of the medium. Light waves, for example, constantly travel in a vacuum at a constant speed of around 299,792,458 meters per second (or about 186,282 miles per second). Nevertheless, as they go on.
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How are particles in air arranged in a:
a) compression?
b) rarefaction?
PLZZZZZZZZZ HELPPPPP. BRAINLEST GIVEN What is a force of attraction between an object and the earth due to gravity?
Answer:
acceleration due to gravity: -9.8 m/s^2
Fg=mass of object*(-9.8)
Explanation:
This is a pretty vague question, but I'll answer as best I can.
All matter has gravity. YOU have gravity, although your gravitational pull is small. So, the force of attraction between the Earth and an object on Earth is modeled as
Force of gravity=(Gravitational constant*mass of object 1*mass of object 2)/distance between objects squared
Note that distance between an object on Earth and Earth is the radius of Earth (distance to Earth's core/center of mass)
Las ruedas de una locomotora de 500 toneladas tiene un coeficiente de friccion estatico con las vias de 0.15 ¿Cual es la fuerza de traccion tangencial maxima ejercida entre las vias y las ruedas?
Answer:
Ff = 7.35*10^5 N
Explanation:
To find the maximum transverse pulling force you use the following formula, for the friction force:
\(F_f=\mu N=\mu Mg\) (1)
μ: friction coefficient = 0.15
N: normal force, which is equal to the weight over the wheel
M: mass of th train = 500 ton = 500 000 kg
g: gravitational acceleration = 9.8 m/s^2
You replace the values of the variables in the equation (1):
\(F_f=(0.15)(500000kg)(9.8m/s^2)=735000 N=7.35*10^5N\)
hence, the maximum transverse pulling force is 7.35*10^5 N
What If Earth got Kicked Out of the Solar System?
Answer:
We wouldn't have our moon and sun. The earth will be colder and darker
Explanation:
Answer:
mars will become habitabe
Explanation:
true fact and every planet will become close to sun
A section of the surface of a hollow sphere has a radius of curvature of 0. 60 m, and both the inside and outside surfaces have a mirror-like polish. what are the focal lengths of the inside and outside surfaces
To find the focal lengths of the inside and outside surfaces of the hollow sphere, we can use the formula for the focal length of a curved mirror:
1/f = (n - 1) * (1/R1 - 1/R2)Where:
- f is the focal length of the mirror- n is the refractive index of the medium surrounding the mirror (assumed to be air, so n = 1)- R1 is the radius of curvature of the mirror's surface- R2 is the radius of curvature of the other surface (in this case, the second surface is the other side of the hollow sphere)Given that the radius of curvature (R1) is 0.60 m, we can substitute these values into the formula:
1/f = (1 - 1) * (1/0.60 - 1/R2)0 = -1 * (1/0.60 - 1/R2)0 = 1/R2 - 1/0.601/R2 = 1/0.60R2 = 0.60 mSince the inside and outside surfaces of the hollow sphere have the same radius of curvature, the focal lengths of both surfaces are equal. Therefore, the focal length of both the inside and outside surfaces of the hollow sphere is 0.60 m.
About EqualIn physics, equality or conservation of a quantity or value in a given context. In general, the equivalent concept is used to state that two things have the same value or replace one another in an equation or physical relationship.
Examples of the use of equivalent concepts in physics include:
Equivalent in units: In unit conversion, a quantity can be expressed in equivalent units, for example 1 meter is equivalent to 100 centimeters, or 1 joule is equivalent to 1 newton meter.Energy equivalent principle: The energy equivalent principle states that energy cannot be created or destroyed, but can only change form or be transferred from one system to another in a fixed amount.Newton's law of action-reaction: Newton's law of action-reaction states that every action has an equal and opposite reaction. For example, when we push against a wall, the wall also exerts an equal force on us.In the context of physics, the concept of equivalent is important for understanding the relationship between these quantities and the basic principles that govern physical phenomena.
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1. Find the temperature when the degrees of the Celsius scale will be one fifth of the corresponding degrees of the Fahrenheit scale
2. How much heat is necessary to warm 500g of water from 20°C to 65°C?
Answer:
F = 9/5 C + 32 conversion from C to F
F = 9/5 * F/5 + 32
25 F = 9 F + 800
16 F = 800
F = 50
Check:
C = 5/9 ( F - 32) = 5/9 (50 - 32) = 10 as requested
Q = c m change in temp
Q = 1 cal/gm-deg C * 500 gm * 45 deg C = 22,500 calories
50 Fahrenheit heat required.
How much heat required?Heat transfer is a discipline of thermal engineering that concerns the generation, use, conversion, and exchange of thermal energy between physical systems.
F = 9/5 C + 32 conversion from C to F
F = 9/5 * F/5 + 32
25 F = 9 F + 800
16 F = 800
F = 50
The answer is 50 Fahrenheit.
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An electromagnetic wave is traveling straight down toward the center of the Earth. At a certain moment in time the electric field points north. In which direction does the magnetic field point at this moment?
Based on the right-hand rule of electromagnetism, if the electric field is pointing north, then the magnetic field would be pointing west.
This is because the magnetic field direction is perpendicular to the direction of the electric field and the direction of wave propagation. At the given moment when the electric field of the electromagnetic wave points north and the wave is traveling straight down towards the center of the Earth, the magnetic field will point west. This is due to the right-hand rule, which states that the direction of the magnetic field is perpendicular to both the direction of the wave propagation and the electric field.
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A ball that has a mechanical energy of 65 J haas 10 j of kinetic energy. The ball has j of potential energy
Answer:
55 j
Explanation:
Mechanical energy = kinetic + potential
65 = 10 + P.E.
55 j = PE
A drive shaft is required to deliver 2017 watts of power What is the required speed (in revolution per minutes) of the drive shaft for it to transmit a torque of 0.86 kNm? Please provide the value only and in 2 decimal places
The required speed of the drive shaft is 2343.02 revolutions per minute (RPM) when transmitting a torque of 0.86 kNm.
To determine the required speed of the drive shaft, we can use the formula relating power, torque, and rotational speed.
The formula for power (P) in terms of torque (T) and rotational speed (ω) is:
P = T * ω
Given:
Power (P) = 2017 watts
Torque (T) = 0.86 kNm = 0.86 * 1000 Nm
We can rearrange the formula to solve for rotational speed (ω):
ω = P / T
Substituting the given values, we have:
ω = 2017 / 0.86 * 1000
ω ≈ 2343.02
Therefore, the required speed of the drive shaft is approximately 2343.02 revolutions per minute (RPM) when transmitting a torque of 0.86 kNm.
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which is 20 light years planet from earth
A light-year is a unit of distance, specifically the distance that light travels in one year.
Light travels at a speed of approximately 299,792 kilometers per second (or about 186,282 miles per second) in a vacuum. Therefore, to determine which planet is 20 light-years away from Earth, we need to identify a planet located at a distance of approximately 20 times this speed of light.
As of my knowledge cutoff in September 2021, no known exoplanets have been directly observed and confirmed to be located exactly 20 light-years away from Earth. However, there are numerous exoplanets that have been discovered within a range of distances from Earth.
Some notable exoplanets discovered within approximately 20 light-years of Earth include:
Proxima Centauri b: This exoplanet is located in the habitable zone of the closest star system to our Solar System, Proxima Centauri. It is estimated to be around 4.24 light-years away.Ross 128 b: This exoplanet orbits a red dwarf star known as Ross 128, located approximately 11 light-years away from Earth.TRAPPIST-1 system: This system hosts seven Earth-sized planets orbiting the ultra-cool dwarf star TRAPPIST-1. The TRAPPIST-1 system is located around 39 light-years away from Earth.know more about light-year here:
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what is the answer to Alfredo, who has a mass of 60kg, jumped off a retaining wall. His kinetic energy when he landed on the ground was 882 joules. What was his gravitational potential energy when he was sitting on the wall?
Answer:
1.5m
Explanation:
i hope this helps
A ball is thrown vertically upward. After t seconds, its height h (in feet ) is given by the function h(t)=40t-16t^(2). What is the maximum height that the ball will reach?
The maximum height that the ball will reach is 25 feet. when the ball will reach its maximum height after 1.25 seconds.
The maximum height that the ball will reach can be determined by finding the vertex of the parabola represented by the function
h(t) = 40t - 16t²
The x-coordinate of the vertex can be found using the formula
x = - b / (2a)
where:
a = coefficient of the t² term
b = coefficient of the t term.
Given
a = -16
b = 40
x = -40/(2×(-16))
= 1.25
This means that the ball will reach its maximum height after 1.25 seconds. We need to substitute this value of t into the function to determine the maximum height:
h(1.25) = 40 (1.25) - 16 (1.25)²
= 50 - 25
= 25.
Therefore, the maximum height that the ball will reach is 25 feet.
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If an object is being pulled by a constant force, what will happen to the acceleration if the mass of the object suddenly doubles?
Which chamber of the heart receives blood with sugar and high oxygen levels from the lungs? A. left atrium B. right atrium C. left ventricle D. right ventricle
Answer:
left atrium
Explanation:
its the first chamber of the heart to receive oxygenated blood from the lungs
A bullet with a mass of 7.91 g and a speed of 352 m/s penetrates a tree horizontally to a depth of 4.86 cm. What is the frictional force?
The frictional force exerted by the bullet on the tree is approximately 10,142.49 N
Elaborating:We can calculate the force using the formula: F = K/d
where d is the distance over which the frictional force acts, which in this case is the depth to which the bullet penetrates the tree.
F = (493.57 J)/(0.0486 m)
F = 10,142.49 N
What is the force of friction?The force that prevents an object from moving when it comes into contact with another object is known as the frictional force. It occurs as a result of objects' surface irregularities, which cause them to resist movement when in contact with one another.
What factors determine the magnitude of the frictional force?How much frictional power relies upon a few elements, for example, the idea of the surfaces in touch, the power squeezing the items together, and the speed at which they move comparative with one another. In mechanics, engineering, and materials science, among other fields of physics, the frictional force is an essential phenomenon.
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which statement identifies a reason to preserves wetlands
Answer:
They store floodwater
Explanation: