Because like poles repel and unlike poles attract. This is a property of every magnet.
Final answer:
Magnets have both north and south poles, which cannot be separated; like poles repel each other, preventing north poles or south poles from meeting. Cutting a magnet results in new pairs of poles, as they always occur in pairs.
Explanation:
Every magnet has two types of poles, a north pole and a south pole. These poles always come in pairs and cannot be separated; they exhibit a fundamental property of magnets. The reason a north pole does not meet another north pole, or a south pole another south pole, is due to the magnetic fields that they generate. Like poles will always repel each other, which means the north pole of one magnet will repel the north pole of another magnet, and the same goes for two south poles.
When a magnet is cut, even into very small fragments, each piece will retain a north and a south pole. It is impossible to isolate a north pole or a south pole on its own, which is a basic principle of magnetism. Therefore, regardless of how much you divide a magnet, you will never end up with a single pole; new pairs of poles will emerge in each fragment. This inherent characteristic is verified by experiments and is even observable on the atomic level with elements that exhibit magnetic properties, such as iron.
HBr is added to water to form a solution. How does adding HBr to the water affect its PH level?
HBr has hydrogen ions (H+), not hydroxide ions (OH-).
Therefore, HBr is an acid, which decrease the pH level.
The answer is A.
the answer is D) your welcome :)))
An alternating current in a wire has a voltage of 2,800 V. It needs to be reduced 70 V. The wire makes 120 turns in the primary coil of a step- down transformation. How many turns of wire need to be in the secondary coil?
To calculate the number of turns in the secondary coil, use the transformer equation. The number of turns in the secondary coil is found by multiplying the ratio of the secondary voltage to the primary voltage by the number of turns in the primary coil.
Explanation:To calculate the number of turns of wire needed in the secondary coil, we can use the transformer equation. The ratio of the secondary voltage to the primary voltage is equal to the ratio of the number of turns in the secondary coil to the number of turns in the primary coil. In this case, the primary voltage is 2,800 V and it needs to be reduced by 70 V. So, the secondary voltage is 2,800 V - 70 V = 2,730 V. The number of turns in the primary coil is 120. Using the transformer equation, we can find the number of turns in the secondary coil:
Number of turns in the secondary coil = (Secondary voltage / Primary voltage) * Number of turns in the primary coil
Number of turns in the secondary coil = (2,730 V / 2,800 V) * 120
Number of turns in the secondary coil = 117
Therefore, there should be 117 turns of wire in the secondary coil.
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3. The direction of the centripetal force acting on a ball on a string being spun in a circle around a person is
A. outward-seeking.
B. parallel to the person.
C. perpendicular to the person.
D. center-seeking.
D. center seeking. Good Luck
Answer: The correct answer is "center-seeking".
Explanation:
Centripetal force is the force which is required to keep the body in the circular motion. The direction of the centripetal force is towards center of the circle.
The expression for the centripetal force is as follows;
[tex]F= \frac{mv^{2} }{r}[/tex]
Here, r is the radius, v is the velocity and m is the mass of the object.
Without this force, the body cannot move in the circular motion. Then, it follows the straight line motion.
The direction of the centripetal force acting on a ball on a string being spun in a circle around a person is center-seeking.
Therefore, the correct option is (D).
When two objects collide, what happens to the total momentum of the interacting forces? Explain why (use the vocabulary: momentum, potential energy and kinetic energy) How is mass related?
In a closed system, when two or more particles collide, the sum of momentum of two particles before and after collision will always be the same. In elastic collision, kinetic energy and momentum of a particle remains conserved. Whereas in inelastic collision, momentum remains same before and after collision but some of the particle's kinetic energy may be converted to other forms of energy.
A moving particle or object may possess kinetic energy and it depends mainly on its motion and mass. The kinetic energy is converted into potential energy and converted back to kinetic energy during collision of small particles.
Choose all the answers that apply. The sun: -is the largest star in our solar system -is the largest star in our galaxy
- is made mostly of hydrogen and helium
-will eventually run out of fuel and die
-creates energy through nuclear reactions
-is made mostly of hydrogen and helium.
-will eventually run out of fuel and die.
-creates energy through nuclear reactions
Answer:
The sun:
-is the largest star in our solar system
- is made mostly of hydrogen and helium
-will eventually run out of fuel and die
-creates energy through nuclear reactions
Explanation:
The sun an average mass and sized star composed of hydrogen and helium gas. It generates energy in its core by nuclear fusion reaction. It is the only star in the solar system. Once all the fuel is run out, the nuclear fusion reaction would stop and the sun would die. There are billions of stars in our milky way galaxy and sun is not the largest of them.
To move a heavy couch across a carpeted floor what could be used to decrease the frictional force
Use a piece of cardboard
Put a lubricant between the surface of the object and the floor. use round objects, like pencils, to decrease the friction and push the refrigerator over the pencils
The _____(height or width) of a sound wave determines its _____(loudness or pitch).
Sound waves are longitudinal mechanical waves, that is, they depend on a medium to propagate.
Among the characteristics of a sound wave, it is the amplitude, that is the degree of movement of the molecules of the medium in which the wave propagates.
Depending on how high this amplitude is, the sound will be louder.
Answer:
1. height
2. loudness
Which is the goal of technology
TO bring joy and ease
It is the use of a (usually) mechanical means to create something physical that uses some scientific principle that will be used in war or for the betterment of man or both.
It is a machine that creates destruction or good or both that uses some sort of scientific basis of which it is an application.
What are the horizontal and vertical components of a
300 N force that is applied along a rope at 60° to the
horizontal and used to drag an object across a yard?
help! can u explain the solve? idk why my answer is always reverse, like the answer for horizontal, not for vertical. the answer for vertical, not for horizontal. so, i am confusing. pls help!
if u got the answer, thanks
Answer:
In the figure attached we can see in a better way this situation. If we are told the rope is at 60 degress to the horizontal, we can place this rope in the origin of the X-Y coordinate system.
If we observe in detail, we have a right triangle where the opposite side [tex]OS[/tex] to the angle [tex]60\º[/tex] is the vertical component [tex]F_{y}[/tex] and the adjacent side [tex]AS[/tex] is the horizontal component [tex]F_{x}[/tex] . So, we can use trigonometric functions to find the force [tex]F[/tex] (the hypotenuse [tex]h[/tex]) applied to the rope.
For [tex]F_{x}[/tex]:
We can use the trigonometric function cosine, which is defined as:
[tex]cos(60\º)=\frac{AS}{h}[/tex]
This means [tex]F_{x}=Fcos(60\º)[/tex]
[tex]F_{x}=300Ncos(60\º)[/tex]
[tex]F_{x}=150N[/tex]
For [tex]F_{y}[/tex]:
We can use the trigonometric function sine, which is defined as:
[tex]sin(60\º)=\frac{OS}{h}[/tex]
This means [tex]F_{y}=Fsin(60\º)[/tex]
[tex]F_{y}=300Nsin(60\º)[/tex]
[tex]F_{y}=259.8N[/tex]
Finally the horizontal and vertical components are 150 N and 259.8 N
James Cameron piloted a submersible craft to the bottom of the Challenger Deep, the deepest point on the ocean's floor, 11,000 m below the surface. What was the total inward force on the 1.1-m-diameter pilot sphere in which Cameron sat?
Answer:
[tex]4.1\cdot 10^8 N[/tex]
Explanation:
First of all, we need to find the pressure exerted on the sphere, which is given by:
[tex]p=p_0 + \rho g h[/tex]
where
[tex]p_0 =1.01\cdot 10^5 Pa[/tex] is the atmospheric pressure
[tex]\rho = 1000 kg/m^3[/tex] is the water density
[tex]g=9.8 m/s^2[/tex] is the gravitational acceleration
[tex]h=11,000 m[/tex] is the depth
Substituting,
[tex]p=1.01\cdot 10^5 Pa + (1000 kg/m^3)(9.8 m/s^2)(11,000 m)=1.08\cdot 10^8 Pa[/tex]
The radius of the sphere is r = d/2= 1.1 m/2= 0.55 m
So the total area of the sphere is
[tex]A=4 \pi r^2 = 4 \pi (0.55 m)^2=3.8 m^2[/tex]
And so, the inward force exerted on it is
[tex]F=pA=(1.08\cdot 10^8 Pa)(3.8 m^2)=4.1\cdot 10^8 N[/tex]
The total inward force is about 4.1 × 10⁸ N
[tex]\texttt{ }[/tex]
Further explanationLet's recall Hydrostatic Pressure formula as follows:
[tex]\boxed{ P = \rho g h}[/tex]
where:
P = hydrosatic pressure ( Pa )
ρ = density of fluid ( kg/m³ )
g = gravitational acceleration ( m/s² )
h = height of a column of liquid ( m )
Let us now tackle the problem!
[tex]\texttt{ }[/tex]
Given:
depth of the ocean's floor = h = 11 000 m
diameter pilot sphere = d = 1.1 m
atmospheric pressure = Po = 10⁵ Pa
Asked:
total inward force = F = ?
Solution:
[tex]F = P A[/tex]
[tex]F = ( P_o + \rho g h ) A[/tex]
[tex]F = ( P_o + \rho g h ) ( \pi d^2 )[/tex] → Area of Sphere = π d²
[tex]F = ( 10^5 + 1000 \times 9.8 \times 11000 ) ( \pi \times 1.1^2 )[/tex]
[tex]F \approx 4.1 \times 10^8 \texttt{ Newton}[/tex]
[tex]\texttt{ }[/tex]
Conclusion:The total inward force is about 4.1 × 10⁸ N
[tex]\texttt{ }[/tex]
Learn moreBuoyant Force : https://brainly.com/question/13922022Kinetic Energy : https://brainly.com/question/692781Volume of Gas : https://brainly.com/question/12893622Impulse : https://brainly.com/question/12855855Gravity : https://brainly.com/question/1724648[tex]\texttt{ }[/tex]
Answer detailsGrade: High School
Subject: Physics
Chapter: Pressure
Consider the four spheres. As illustrated by the diagram, we would expect spheres A - C to be attracted to sphere D. Sphere D has the greatest gravitational force because as represented here, it
Has the most mass and density creating a gravitational field and pulling in the A and C with the lesser mass
Answer: the answer is A
Explanation:
Which is an advantage of using space observatories for space exploration?
It allows scientists to avoid the effects of light pollution.
Answer:
The advantage is to avoid the effects of light pollution.
Explanation:
There are several reasons why space observation is desirable in order to avoid problems that terrestrial observatories have. An example of this is that the space observatory does not suffer from the interference of city lights, avoiding light pollution. In addition, thermal turbulence (present in the atmosphere) also does not alter the telescope image. The terrestrial atmosphere, having a spherical shape, acts as a lens that distorts images (a fact known as optical aberration), so the resolution of terrestrial images has a significant reduction. The atmosphere of our planet also absorbs an important portion of the electromagnetic spectrum (infrared and ultraviolet rays, for example), so some observations are virtually impossible to make.
most earthquakes happen:
Final answer:
Most earthquakes occur along plate boundaries where stress is released through sudden slippages. The longer the interval between earthquakes, the greater the stress and energy released when the surface finally moves.
Explanation:
Most earthquakes occur along plate boundaries where tectonic plates interact. The motion of these plates builds up stress in the crust, which is released in sudden and violent slippages that generate earthquakes. The longer the interval between earthquakes, the greater the stress and the more energy released when the surface finally moves. For example, in California, the San Andreas Fault slips every 25 years or so, while the average interval between major earthquakes in the Los Angeles region is about 150 years.
You use a very sensitive instrument to measure the speed of sound in your front yard in December. You repeat the test in August when the temperature is 10°C (50°F) warmer. In August, the speed of sound will be:
A: slower
B: the same
C: faster
than in December.
The speed of sound varies depending on the medium through which the sound waves travel. In addition, it varies with changes in the temperature of the medium. This is because an increase in temperature means that the frequency of interactions between the particles that transport the vibration increases, hence this increase in activity increases the speed. That is why the speed of sound in a gas is not constant, but depends on the temperature.
So, if we want the speed of sound in a gas to increase, the temperature of that gas must increase, as well.
For example, the higher the air temperature, the greater the velocity of propagation. Experiments have shown that the speed of sound in air increases [tex]0.6m/s[/tex] for every [tex]1\°C[/tex] increase in temperature.
Therefore:
The speed of sound will be faster than in DecemberAnswer:
Faster
Explanation:
If temp. gets cold resistance in thermostat increases so voltage across it increases AND LED lights brighter. I understand everything except that for LED. It emits light when current passes through it, but if resistance increases how can current increase???
Normally, when something gets colder, its electrical resistance gets smaller. This is true of component-A in the drawing ... a simple resistor.
The component labeled 'B' has a strange and unusual symbol, and it's not a simple resistor. It's a "thermistor". The word "thermal" always has something to do with heat, and "thermistor" comes from "thermal resistor. These things can be manufactured either way ... using different materials, a thermistor can be manufactured so that its resistance goes UP, or goes DOWN, or doesn'tchange when it gets colder. I'm pretty sure that's what's going on here.
When this circuit gets colder, resistance-A gets smaller, but resistance-B either gets bigger OR doesn't change. Either way, the voltage across B increases. Since the LED is connected directly across B, the current through it depends on that voltage, so the LED gets more current, and becomes brighter, when A and B both get colder.
This circuit could actually be a very useful device. If you took out the LED and put a voltmeter in its place, then the reading on the voltmeter would tell you the temperature of wherever you put the two components A and B.
A cart with an initial velocity of 5.0 m/s to the right experiences a constant acceleration of 2.0 m/s2 to the right. What is the cart’s displacement during the first 6.0 s of this motion
Answer
66 m
Using the 2nd equation of linear motion, we can be able to solve the problem.
The equation states that;
S = ut + 1/2 at²
Where s ⇒ displacement,
u ⇒ initial velocity,
t ⇒ time and
a ⇒ is acceleration
∴ S = ut + 1/2 at²
= (5 × 6) + (1/2 × 2 × 6²)
= 30 + 36
= 66 m
which of the following expressions is equivalent to the expression
[tex] \frac{ - 50}{8} [/tex]
a.
[tex] \frac{ - 50}{ - 8} [/tex]
b.
[tex] \frac{50}{ - 8} [/tex]
c.
Answer:
B. 50/-8
Explanation:
The expression -50/8 is equivalent to;
-50/8 = -6.25
The expression; 50/-8 is also equal to -6.25
Therefore;
The expression; -50/8 is equal to 50/-8
In which direction does a bag at rest move when a force of 20 newtons is applied from the right? A. in the direction of the applied force B. in the direction opposite of the direction of the applied force C. perpendicular to the direction of the applied force D. in a circular motion
The correct answer is A. In the direction of applied force. This is because acceleration occurs n the direction of applied force according to Newtons second law of motion which states that the acceleration of a body is directly proportional to the applied force and takes place in the direction of force.
Answer:
A. in the direction of the applied force
Explanation:
As per newton's first law of motion we know that object will not change in its state of motion till some external force is applied on it
So here we can say that when force is applied on an stationary object then the stationary object will move in the direction of applied force so change in the state of motion from rest state to moving state will occur and the direction of motion must be in applied force direction
So correct answer will be
A. in the direction of the applied force
An electron with a charge value of 1.6x10^-19 C is in the presence of an electric field of 300 N/C when located between a pair of oscilloscope deflecting plates. What force does the electron experience?
(1.6 x 10⁻¹⁹ C) x (300 N/C) = 4.8 x 10⁻¹⁷ Newton
The force experienced by the electron is 4.8×10⁻¹⁷ N.
Electric Field: An electric field is a region or space, where an electric force can be experienced or felt.
The formula of electric force is
F = E×Q............... Equation 1
Where F = Electric force, E = Electric field, Q = Charge.
From the question,
Given: Q = 1.6×10⁻¹⁹ C, E = 300 N/C
Substitute these values into equation 1
F = (1.6×10⁻¹⁹)(300)
F = 4.8×10⁻¹⁷ N.
Hence, The force experienced by the electron is 4.8×10⁻¹⁷ N.
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If temperature increases, what happens to pressure? Question 3 options: Pressure increases. Pressure decreases. Pressure stays the same.
Answer:
Pressure increases
Explanation:
Gay- Lussac's law gives the relationship between pressure and the temperature. There exists a direct relationship between temperature and pressure as per Gay- Lussac's law as :
At constant volume, [tex]pressure\propto temperature[/tex]
It is clear that pressure and temperature are directly proportional to each other. So, if temperature increases, pressure also increase. Hence, the correct option is (A) " Pressure increases ".
Answer: the pressure increases!
what is the simple average of these two velocities (0m/s, 0.4m/s)
The answer should be 0.2 :D
Mass is a measure of the amount of matter in a substance. Weight, on the other hand, is a form of gravitational attraction, which is dependent upon mass and distance. Which of the following actions will cause the gravitational attraction between the Earth and an object to increase?
A.
increasing the mass of the object
B.
decreasing the mass of the Earth
C.
increasing the distance between the Earth and the object
D.
decreasing the distance between the object and the Sun
From this particular list of choices, only A. increasing the mass of the object can increase the gravitational attraction between the object and the Earth.
Choices B and C have exactly the opposite effect, and choice-D has no effect at all.
This is all just a complicated, technical way of saying that if you eat a big steak plus a few shakes, your mass increases, and you WILL gain weight.
Answer:
A
Explanation:
got it right on study island
a tool that uses lenses to focus light and
create useful images
the answer your looking for is Optical instrument.
-- microscope
-- eyeglasses
-- telescope (refracting type)
Which of the following objects is NOT in a state of equilibrium?
A glass table able to withstand a normal force of 450 N when a 500 N object is placed on it.
Two teams pulling a rope in opposite directions, both with a force of 3670 N
An 80-N rope holding up a 920-N weight with a tension of 1000 N.
A 500-newton sign hanging from two chains of insignificant weight, each with a tension of 250 N
Answer:
A glass table able to withstand a normal force of 450 N when a 500 N object is placed on it
Explanation:
An object is said to be in equilibrium when the net force acting on it is zero.
Let's analyze each option:
- A glass table able to withstand a normal force of 450 N when a 500 N object is placed on it. --> NON-EQUILIBRIUM. In fact, the downward force (the weight of the object, 500 N) is more than the maximum upward normal force (450 N), so the net force is non-zero.
- Two teams pulling a rope in opposite directions, both with a force of 3670 N --> EQUILIBRIUM. Both forces are equal in magnitude and opposite in direction, so the net force is zero.
- An 80-N rope holding up a 920-N weight with a tension of 1000 N. --> EQUILIBRIUM. The total force pulling on one side is 80 N + 920 N = 1000 N, which is equal to the force on the other side.
- A 500-newton sign hanging from two chains of insignificant weight, each with a tension of 250 N --> EQUILIBRIUM. The total force pushing on one side is 250 N*2 = 500 N, which is equal to the force on the other side.
How does a pulley make work easier?
A pulley makes work easier by redistributing the force required to lift an object, providing mechanical advantage and allowing the user to exert less force over a greater distance.
A pulley is a simple machine that consists of a grooved wheel and a rope or cable. It is used to change the direction or magnitude of a force, making it easier to lift or move heavy objects.
The primary concept behind how a pulley makes work easier is the principle of mechanical advantage. Mechanical advantage refers to the ability of a machine to multiply the input force applied to it, resulting in a greater output force. In the case of a pulley, it can provide a mechanical advantage by redistributing the force required to lift an object over a larger distance.
When a force is applied to one end of the rope wrapped around a pulley, the tension in the rope becomes equal throughout its length. This means that the force applied on one side of the pulley is transmitted to the other side with the same magnitude. As a result, the load being lifted is shared between the rope segments on each side of the pulley.
By using multiple pulleys, either in a fixed or movable configuration, a system of pulleys known as a block and tackle can be created. This arrangement allows for further mechanical advantage by increasing the number of rope segments supporting the load. Each additional pulley effectively divides the force required to lift the load, reducing the effort needed.
Therefore, a pulley system allows the user to exert less force over a greater distance, making it easier to lift heavy objects. The mechanical advantage provided by the pulley helps in minimizing the effort required to overcome the resistance or weight of the load, thus making work easier.
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An atom with five protons six neutrons and five electrons has an atomic mass of
An atom with five protons six neutrons and five electrons has an atomic mass of.
The element is boron with a atomic mass of 10.811 u
definition of liquid
a substance that is not solid
plz give me a brainliesttttt
According to the dictionary, the definition of liquid is, "a substance that flows freely but is of constant volume, having a consistency like that of water or oil."
What is the structure located inside the nucleus of a cell that contains an organism’s genetic code?
This belongs in the bio section but the structure are the chromosomes that contain the DNA strands themselves containing the genetic information of any living things
I'm hungry as hell right now. How much time does someone need to die from starving?
About 2 months depends on the person
A 111.6 g sample of iron was heated from 0°C to 20°C. It absorbed 1004 J of energy. What is the specific heat capacity of iron?
Answer:
0.45 J/gC
Explanation:
The heat absorbed by the sample of iron is given by:
[tex]Q=mC_s (T_f-T_i)[/tex]
where:
Q = 1004 J is the heat absorbed
m = 111.6 g is the mass of the sample
Cs is the specific heat capacity of iron
T_f = 20 C is the final temperature of the sample
T_i = 0 C is the initial temperature
Solving the equation for Cs, we find
[tex]C_s = \frac{Q}{m(T_f-T_i)}=\frac{1004 J}{(111.6 g)(20 C-0 C)}=0.45 J/gC[/tex]