When an object that is made of magnetic material but is not a magnet comes in contact with a magnet _____.

To solve this problem, we need to analyze the projectile motion of the ball. Therefore, the horizontal component is approximately 14.878 m/s.Therefore, the ball is in the air for approximately 1.954 seconds.

Given:

Initial speed (magnitude): 18.0 m/s

Launch angle: 31.0 degrees above the horizontal

We can break down the initial velocity into horizontal and vertical components:

Initial horizontal velocity (v₀x) = v₀ * cos(θ)

Initial vertical velocity (v₀y) = v₀ * sin(θ)

where v₀ is the initial speed and θ is the launch angle.

Using the given values:

v₀ = 18.0 m/s

θ = 31.0 degrees (converted to radians, 31° * π/180 ≈ 0.5411 rad)

v₀x = 18.0 m/s * cos(0.5411 rad) ≈ 14.878 m/s (rounded to three significant figures)

v₀y = 18.0 m/s * sin(0.5411 rad) ≈ 9.570 m/s (rounded to three significant figures)

Part A: The horizontal component of the ball's velocity just before it is caught is equal to the initial horizontal velocity because there is no horizontal acceleration during the ball's flight. Therefore, the horizontal component is approximately 14.878 m/s.

Part B: The time of flight can be determined using the equation:

Δy = v₀y * t + (1/2) * g * t²

where Δy is the vertical displacement (initially 0 m since it is caught at the same level), v₀y is the initial vertical velocity, t is the time, and g is the acceleration due to gravity (-9.8 m/s²).

0 m = 9.570 m/s * t + (1/2) * (-9.8 m/s²) * t²

Simplifying the equation:

-4.9 t² + 9.570 t = 0

Solving this quadratic equation, we find two possible solutions for t: t = 0 s or t = 1.954 s.

Since the ball is caught, we consider the positive value of time, which is approximately t = 1.954 s (rounded to three significant figures).

Therefore, the ball is in the air for approximately 1.954 seconds.

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Answer:

Total resistance in parallel is 1.2703136679494.

Total resistance in series is 155.Total resistance in series is 155.

Explanation:

Answer:

P = I V = I^2 R

R = 150 + 300 = 450 Ω

I = 150 / 450 = .333 amps

P(150) = .333^2 * 150 = 16.7 W

During time interval t2, the voltage is decreasing from the maximum value to 0, as the magnetic flux linkage with the coil is reduced.

When an isolated magnetic North pole is discovered and dropped through the set-up (magnet through a coil experiment), there is a change in magnetic flux linkage within the coil. Therefore, the induced electromotive force (EMF) will cause a voltage pattern to form.The Faraday's Law of Electromagnetic Induction states that when there is a change in magnetic flux linkage within a coil, an EMF is induced in the coil.

In this scenario, the magnetic flux linkage increases as the magnetic North pole enters the coil and decreases when it exits the coil, which will result in a change in the direction of the induced EMF within the coil.The voltage pattern obtained from the experiment depends on the rate at which the magnetic North pole is dropped through the set-up and the number of turns of the coil.

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During the acceleration phase, the tyres' angular displacement is 23.2 rad.

Calculating the angular displacement of the tyres during the acceleration phase requires multiplying their linear displacement by their angular velocity. By multiplying the acceleration by the time of acceleration, the linear displacement of the tyres may be determined.

Calculate the linear displacement of the tires.

Linear displacement = Acceleration x Time = 1.17 m/s2 x 0.55 s = 0.64 m.

Calculate the angular velocity.

Angular velocity = Linear velocity / Radius = 14 m/s / 0.33 m = 42.42 rad/s.

Calculate the angular displacement.

Angular displacement = Angular velocity x Time = 42.42 rad/s x 0.55 s = 23.2 rad.

Therefore, the angular displacement of the tires during the period of acceleration is 23.2 rad.

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Answer:

0.18 amperes

Explanation:

V = 9

R = 50 ohms

I =  ?

Formula

V = I * R

Solution

9 = I * 50           Divide by 50. Switch

I = 9 / 50

I = 0.18 amperes.

If you know what a milliampere is then it is 180 ma which is very large for a 9 volt battery to handle

Answer: The property that will best provide evidence that the samples are solid includes:

--> if the substance has a definite shape,

-->if the substance has a definite volume

--> if it's tightly packed.

Explanation:

According to the kinetic theory of matter, every substance consist of very large number of very small particles called molecules. These molecules, which are made up of atoms that are the smallest particles of a substance that can exist in a free state.

Matter can exist in the following states:

--> Solid state

--> liquid state or

--> Gaseous state.

The general property of a substance that is in gaseous state includes:

--> Definite shape: A substance can be grouped as a solid if it's shape is fixed that is, it doesn't depend on the shape of other materials.

--> Definite volume: A substance can be grouped as a solid if it occupies its own shape. This is due to the force of cohesion among its molecules.

--> Tightly packed: A substance can be grouped as solid if the molecular movements of the particles are negligible.

From the samples under observation by Juan and kym, if the sample that possesses the above described qualities, it is a solid rather than liquid or gas.

The editing technique is used to indicate a passage of time, usually symbolizing a sunset and sun rise is montage .

Montages are one of the most common techniques used to show the passage of time. In motion pictures, the editing technique of assembling separate pieces of thematically related film and putting them together into a sequence.

A Montage is a series of video messages sent privately from a bunch of people who really care about you, and combined into one surprise, video gift. Most Montages are 10-30 minutes long. The longest Montage ever was 1 hour and 12 minutes long

Montages enable filmmakers to communicate a large amount of information to an audience over a shorter span of time by juxtaposing different shots, compressing time through editing, or intertwining multiple storylines of a narrative. The word “montage” derives from French — meaning “assembly” or “editing.”

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Answer:

I think it is the third one

Explanation:

Everything about it is flipped

The electromagnets with poles that are reversed from the electromagnet  is according to image C.

A substance which is negative charged at one end and positive charged at another end creating the magnetic field around it.

A bar is a magnet which can attract the particle which are charged. It has two poles North and South.

The electromagnet is find in the electric motor. In the motor, loop made up of conductor is rotated by the effect of magnetic field of permanent magnet.

An electromagnet is a soft metal core made into a magnet by the passage of electric current through a coil surrounding it.

When the poles are reversed, then the direction of current flow is also reversed.

Thus, the correct option is C.

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The atom that is the most electronegative is fluorine (F).

Electronegativity, is the tendency for an atom of a given chemical element to attract shared electrons when forming a chemical bond.

Electronegativity increases across the groups from left to right of the periodic table and decreases down the group.

Examples of electronegative elements arranged in decreasing order;

Thus,  the atom that is the most electronegative is fluorine (F).

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Answer:

Volume, temperature, pressure and amount.

Explanation:

Answer:

The Four Gas Law Variables: Volume, Temperature, Pressure, and Amount. All gases must be enclosed in a container that, if there are openings, can be sealed with no leaks. The three-dimensional space enclosed by the container walls is called volume.

Explanation:

Answer:

b. 1.1 m/s c. -1.1 m/s

Explanation:

b.

m x v=f x t

The mass is 10 kg

10 x v (equation for momentum) = f x t (impulse)

you would find the impulse by finding the area under the graph, and then dividing by the mass

So in this case:

10 x v = 11

then divide by the mass

v = 11/10

v= 1.1 m/s

c.

F x t = impulse

we are trying to find force (magnitude)

impulse/t = F

we said that in order for it to stop the impulse for b would be 11, so if thats the case it would be 11 but it would be negative because when going in a positive direction and suddenly stopping the direction changes.

-11/t = F

to find t all we need to do is find the amount of seconds between 10 and 20, that would be 10.

-11/10 = F

F= -1.1 m/s

Answer B:

The velocity of the box at 10 seconds is :

              m x v=f x t

Given Information :

Mass(m)=10kg

Therefore, the velocity of the box at 10 seconds is 1.1m/s.

Answer C:

The magnitude and direction of that force be :

F x t = impulse

To find t all we need to do is find the amount of seconds between 10 and 20, that would be 10.

The magnitude and direction of that force will be -1.1m/s.

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Answer: C. Be more dense and flow under warm air.

Explanation:

think of a supermarket selling dairy products and when you open the fridge to get the milk, outside the supermarket is hot and inside the fridge is cold ice.

Answer:

Yes

Explanation:

\(v = \frac{ds}{dt} \\ where \: we \: need \: to \: know \\ \: change \: in \: displacement \\ \: and \: the \: time \: taken\)

if you know the time it took an object to travel between two points and the position of the object at the points, then we can determine the object's instantaneous velocity by using the differential rate of the displacement function with respect to the time.

Instantaneous velocity =  \(\frac{dS}{dt}\)

The total displacement covered by any object per unit of time is known as velocity. It depends on the magnitude as well as the direction of the moving object.

velocity= displacement  / time taken

for instantaneous velocity =  \(\frac{dS}{dt}\)

Thus, If you know how long it took an item to go between two places and where it was when it got there, you can use the differential rate of the displacement function with respect to time to calculate the object's instantaneous velocity.

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The kinetic energy of the object is increasing when the force acts on the object as shown in option A.

Kinetic energy is the energy possessed by a body by virtue of its motion. Hence, a body that has kinetic energy must be in motion. Recall that the reason for motion is a force.

Now, for a force to increase the kinetic energy of the moving object, the force must act in the same direction. Therefore, the correct answer to the question ought to be the diagram shown in option A.

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Answer:

D. Force is pointing northwest (135 degrees) and Vi is pointing to the east (0 degrees).

Explanation:

Answer:

its the third one

Explanation:

The thrust of the rocket is 0.807 MN.

The thrust of the rocket is calculated by applying Newton's second law of motion as shown below.

F = ma

where;

F = m (v/t)

F = m (x/t²)

F = ( m/t) (x / t)

F = ( m/t ) ( v )

where;

F = ( 269 kg/s ) ( 3,000 m/s )

F = 807,000 N

F = 0.807 MN

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(a) The speed of the ball at the lowest point is 1.97 m/s.

(b) The tension in the rod at the lowest point is 1.29 N since the ball is weightless at that instant.

(c) The angle at which the tension in the rod equals the weight of the ball is 81.4 degrees.

(d) The answer to (c) remains the same if the mass of the ball is increased.

(a) To find the speed of the ball at its lowest point, we can use the conservation of energy. At the highest point, the ball has potential energy equal to mgh, where m is the mass of the ball, g is the acceleration due to gravity (9.81 m/s²), and h is the height of the ball above its lowest point. At the lowest point, all of this potential energy is converted into kinetic energy, so we can set mgh = (1/2)mv², where v is the speed of the ball at its lowest point.

Solving for v, we get:

mgh = (1/2)mv²

v² = 2gh

v = √(2gh)

Plugging in the values, we get:

v = √(2 x 9.81 x 0.62) = 1.97 m/s

Therefore, the speed of the ball at its lowest point is 1.97 m/s.

(b) To find the tension in the rod at the lowest point, we can use Newton's second law. At the lowest point, the ball is moving in a circular path with a constant speed, so the net force on the ball is the centripetal force:

F_net = mv²/r

where r is the length of the rod. The only force acting on the ball at the lowest point is tension in the rod, so we can write:

T - mg = mv²/r

Solving for T, we get:

T = mv²/r + mg

Plugging in the values, we get:

T = (0.092 kg) x (1.97 m/s)² / 0.62 m + (0.092 kg) x (9.81 m/²) = 1.29 N

Therefore, the tension in the rod at the lowest point is 1.29 N.

(c) To find the angle at which the tension in the rod equals the weight of the ball, we can use trigonometry. Let θ be the angle between the rod and the vertical. At this angle, the tension in the rod is equal to the weight of the ball, so we can write:

T = mg sin(θ)

where m is the mass of the ball and g is the acceleration due to gravity.

Solving for θ, we get:

θ = \(sin^{(-1)\)T/mg)

Plugging in the values, we get:

θ = \(sin^{(-1)\)(1.29 N / (0.092 kg x 9.81 m/s²)) = 81.4 degrees

Therefore, the angle at which the tension in the rod equals the weight of the ball is 81.4 degrees.

(d) If the mass of the ball is increased, the answer to (c) will remain the same. This is because the tension in the rod and the weight of the ball both increase by the same factor, so their ratio remains the same.

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Answer:

No and yes it's like a 30%or 20%

Explanation:

"researchers say that there is no proof that dimples are inherited."

meaning that if the mom or dad had dimples it might have a chance or no since a dominant trait not a recessive trait

True

In place of photographic plates or films, charge coupled devices, or CCDs, are sensitive photon detectors that can be employed in telescopes to create images. CCDs were created in the late 1960s and are now found in various devices, including digital cameras and photocopiers.

CCDs are more light-efficient, catch a greater proportion of incoming photons, can store and transfer digital data, and don't require development like film does. They respond linearly and capture up to 80% of the light that strikes them.

I understand the question you are looking for is this:

One of the primary advantages of CCDs over photographic plates is the former's high efficiency in detecting light. True or false.

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The normal force between the steel spatula and the dry steel frying pan is 0.5 N.

The frictional force between two surfaces can be calculated using the formula Ff = μk × FN, where Ff is the frictional force, μk is the coefficient of kinetic friction, and FN is the normal force. Rearranging the formula to solve for the normal force gives us FN = Ff / μk.

Plugging in the given values for the frictional force and coefficient of kinetic friction, we get:

FN = 0.150 N / 0.3

FN = 0.5 N

Therefore, the normal force between the steel spatula and the dry steel frying pan is 0.5 N.

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Answer:

Example for 1. Law of Inertia

Falling forward while getting down from a moving bus:

When a passenger gets down from a moving bus, their upper body is still in motion, and when it comes in contact with the ground which is at rest, their body topples forward due to the inertia of motion.

Example for 2. Law of Acceleration

Hitting a Ball:

A ball develops a certain amount of acceleration after being hit. The acceleration with which the ball moves is directly proportional to the force applied to it. This means that the harder you hit the ball, the faster it will move

Example for 3. Law of Interaction

Walking:

Whenever people walk, their foot exerts a force on the ground. The ground then exerts an equal force which points in the opposite direction. It is this force (force due to friction) that allows the person to move forward.

Example for 4. Work and Power

As P=F.v

Cycling:

A person riding a bicycle possesses some amount of energy. This energy is utilized by the cyclist to do work on the paddles of the bicycle by applying some force and enabling the bicycle to move forward.

Example for 5. PE to KE

An apple hanging on a tree:

It has the potential energy due to its raised position. When the apple falls from the tree. The falling apple has the kinetic energy. Thus the potential energy stored in the apple in its raised position changes into the kinetic energy when the apple is falling. This kinetic energy does work on stone as the apple strikes the stone, and it makes the stone to move into the ground.

Example for 6. Sound and Light

TV:

We see TV takes electrical energy as input and produces. light energy, sound energy.

Example for 7. Heat and Electricity

The electric heaters:

An electric heater is an electrical device that converts an electric current into heat.

The time taken by Kamal's family to drive on the second day is 6.45 hours.

What is speed?

Speed is defined as the ratio of the time it takes for a body to cross a distance to the time it takes.

The time is calculated as:-

For 4 hours of driving at an average speed of 60 miles per hour, the distance covered is,

d = 60 x 4 = 240miles

Miles remaining for the second day is,

627 - 240 = 387 miles

Time taken to cover 387 miles second day is,

T = 387 / 60 = 6.45 hours

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Answer:

It is not correct.

The correct conversion is:

1030 KJ = 246.18 KCal.

Explanation:

To know if 1030 KJ is equivalent to 245 KCal, we shall convert 1030 kJ to kcal. This can be obtained as follow:

4.184 KJ = 1 KCal

Therefore,

1030 KJ = 1030 KJ × 1 KCal / 4.184 KJ

1030 KJ = 246.18 KCal.

Thus, 1030 KJ is equivalent to 246.18 KCal.

From the above calculation, we can see that:

1030 KJ ≠ 245 KCal

Rather,

1030 KJ = 246.18 KCal.

The gas state of a substance that is normally a solid or a liquid at room temperature occurs when the substance undergoes a phase change from solid or liquid to gas.

This phase change is known as sublimation for solids and evaporation for liquids. The temperature and pressure conditions at which sublimation or evaporation occurs depend on the substance's properties, such as its intermolecular forces and molecular weight. For example, dry ice (solid carbon dioxide) sublimes at -78.5°C and atmospheric pressure, while water (a liquid at room temperature) evaporates at 100°C and atmospheric pressure. The gas state of normally solid or liquid substances has many practical applications, such as in refrigeration, gas storage, and chemical synthesis.

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Answer:

A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses.

Explanation:

Resistors are common elements of electrical networks and electronic circuits and are ubiquitous in electronic equipment. Practical resistors as discrete components can be composed of various compounds and forms. Resistors are also implemented within integrated circuits.

The electrical function of a resistor is specified by its resistance: common commercial resistors are manufactured over a range of more than nine orders of magnitude. The nominal value of the resistance falls within the manufacturing tolerance, indicated on the component.

The electric field across the membrane is:

Electric field =(-0.07 V) / (10 × \(10^-9\) m) = -7 ×\(10^6\) V/m

calculate the electric field across the neuron's membrane, we can use the following formula:

E = V / d

where E is the electric field strength, V is the potential difference across the membrane, and d is the thickness of the membrane.

In this case, the potential difference is the resting potential of -70 mV, or -0.07 V (since 1 mV = 0.001 V), and the thickness of the membrane is 10 nm, or 10 × \(10^-9\)m. Therefore, we can calculate the electric field as follows:

E = (-0.07 V) / (10 ×\(10^-9\) m) = -7 × \(10^6\) V/m

The electric field across the membrane is negative, indicating that the inside of the neuron is more negative than the outside. The direction of the electric field is from the outside to the inside of the neuron.

The resting potential of a neuron is the difference in electric potential between the inside and outside of the neuron when it is not actively transmitting a signal. This resting potential is maintained by the selective permeability of the neuron's cell membrane, which allows certain ions to move in and out of the cell while restricting others. In a typical neuron, the inside of the cell is negative compared to the outside due to the unequal distribution of ions across the cell membrane.

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To determine how close together two point sources could be at a 2-million-light-year distance, like the Andromeda Galaxy, you'll need to consider the following factors:

1. The distance of the point sources: In this case, it's 2 million light-years away, which is the approximate distance of the Andromeda Galaxy from Earth.
2. The angular resolution of the observing instrument: This is the minimum angular separation between two objects that an instrument can resolve. This value depends on the specific telescope or device you are using to observe the point sources.

To calculate the minimum separation between the point sources, you can use the formula:
Minimum separation (in light-years) = Distance (in light-years) * Angular separation (in radians)

You'll need to know the angular resolution of the observing instrument to determine the minimum separation. Once you have the angular resolution, you can convert it from arcseconds to radians by dividing it by 206,265 (since 1 radian equals 206,265 arcseconds). Then, you can plug that value into the formula above to find the minimum separation in light-years.

In summary, to find how close together the point sources could be at the 2-million-light-year distance of the Andromeda Galaxy, you need to know the angular resolution of the observing instrument, convert it to radians, and then use the formula above to calculate the minimum separation in light-years.

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The factor that can have a significant influence on a planet’s surface temperature is its atmosphere.

The atmosphere plays a fundamental role in the Earth planet's temperature because it allows the entry and out of certain types of radiation that may increase the temperature.

The role of the atmosphere in the Earth's temperature is well documented because our temperature is thick and it increases its homeostatic temperature balance.

In conclusion, the factor that alters a planet’s surface temperature is its atmosphere.

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Answer:

The mass of the block of material is 3 x 10³⁷ g/mol

The charge of the material is  4.8 x 10⁸ C

Explanation:

Given;

number of protons of the material, P = 3 x 10²⁷

number of neutrons in the material, N = 3 x 10³⁷

number of electrons in the material, E =  3 x 10²⁷

The mass of the block of material is calculated as follows;

M = P + N

M =  3 x 10²⁷ +  3 x 10³⁷

M =  3 x 10³⁷ g/mol

The charge of the material is calculated as follows;

charge of 1 electron = 1.6 x 10⁻¹⁹ C

charge of  3 x 10²⁷ electrons =  3 x 10²⁷ electrons   x   1.6 x 10⁻¹⁹ C

                                                = 4.8 x 10⁸ C