What does an electromagnet do?
Name five (5) things.

If the ice extended right around the earth, forming a loop that the puck could go around in circles, the puck would not keep going forever. The laws of physics would eventually cause the puck to come to a stop. This is because of two factors: air resistance and gravity.

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Answer:

the laws of motion is what keeps everything going an back without gravity they couldn't been no us . let them say what they was but newton knows best if they want to come an say newtons discovery changed the world without him we couldn't rest

Answer:Stronger they are

(I think...)

Some of the ways that humans are destroying natural resources and the effect of human activities include:

Some of the ways to reduce the effects of our activities are:

Deforestation is the clearing of forests for human use. This can lead to soil erosion, water pollution, and the loss of biodiversity. Oil drilling is the process of extracting oil from the ground. This can pollute the air and water, and can damage the environment.

Driving less is one of the best ways to reduce our impact on the environment. We can walk, bike, or take public transportation whenever possible. Meat production is a major contributor to climate change. We can reduce our impact on the environment by eating less meat and more plant-based foods.

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A star grow larger after it exhausts its core hydrogen because B) Hydrogen fusion in a shell outside the core generates enough thermal pressure to push the upper layers outward.

When a star exhausts its core hydrogen, the inward gravitational force is no longer balanced by the outward pressure from fusion, causing the core to contract and heat up. This increased temperature ignites hydrogen fusion in a shell outside the core.

The energy produced by this fusion generates enough thermal pressure to push the upper layers of the star outward, causing it to expand and grow larger.

This expansion continues until the outer layers of the star become cool enough that the pressure is no longer sufficient to resist gravity, and the star begins to contract again. This cycle of expansion and contraction can repeat multiple times, depending on the mass of the star.

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Answer:

C would be the correct answer

Answer:

It has to have a whistle device on the spout. When boiling occurs, water vapour displaces air above the water which has to escape through the whistle hence activating the required vibrations. Thereafter, the continuing supply of steam does the same job until the cook involves turns off the heat. The whistle is not made to exacting scientific standards and there is no doubt a range of pressures above which it will work it. It would be interesting to know how you observed the water boiling without using a transparent kettle.

Explanation:

hope it helps

The center of gravity of a baseball bat is typically closer to the heavy end of the bat. As a result, the center of gravity of the bat will be located closer to the heavy end than to the handgrip. Therefore, the correct answer is C) closer to the heavy end.

This is because the mass of the bat is concentrated in the barrel end, which is heavier than the handle. When the bat is balanced on a fulcrum, the heavy end of the bat will naturally want to fall downward due to the force of gravity.

The center of gravity is the point at which the weight of an object can be considered to be concentrated. It is the average position of the weight distribution of the object. When a baseball bat is balanced on a fulcrum, the center of gravity of the bat must be directly above the fulcrum in order for the bat to remain in a state of equilibrium.

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The Correct choice is :

because the ball comes in motion as the boy kicks the ball.

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(b) There are 9 different possible combinations of quantum numbers for the two 2p electrons in carbon.

(c) There is only 1 different set of quantum numbers possible for the two electrons in carbon, taking into account the Pauli principle.

(b) The quantum numbers that describe an electron in an atom are the principal quantum number (n), azimuthal quantum number (l), magnetic quantum number (ml), and spin quantum number (ms). Ignoring the Pauli principle, each of the two 2p electrons in carbon can have its own set of quantum numbers.

For the 2p sublevel, the azimuthal quantum number (l) can have a value of 1, and the magnetic quantum number (ml) can have values of -1, 0, and 1. The principal quantum number (n) will be the same for both electrons since they are in the same sublevel.

Therefore, for each electron, there are 3 possible combinations of quantum numbers: (n, l, ml). For the two electrons, we can multiply these possibilities together: 3 * 3 = 9.

Thus, ignoring the Pauli principle, there are 9 different possible combinations of quantum numbers for the two 2p electrons in carbon.

(c) The Pauli exclusion principle states that no two electrons in an atom can have the same set of four quantum numbers. This means that for the two electrons in carbon, each combination of quantum numbers can only be used once.

Since there are 9 different possible combinations of quantum numbers obtained in part (b), applying the Pauli principle eliminates 9 - 1 = 8 of these combinations. This is because one combination will be the same as the other when the order of the electrons is switched.

Therefore, after applying the Pauli principle, only 1 out of the 9 possible combinations remains.

In summary, there is only 1 different set of quantum numbers possible for the two electrons in carbon, taking into account the Pauli principle.

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Answer:

A

A fox and hawk can be both a predator and prey

Answer:

0.0118125 (kg)

Explanation:

mass = density x volume

First, find the volume of the cube as you're already given the density. You're also given the length of the cube, 1.5 cm. You need to convert this to m since the density's unit is kg/m^2

1.5cm x (1m/100cm) = 0.015m

Since Volume = (length)^3,

Volume of the cube = (0.015)^3

Volume of the cube = 3.375*10^-6

So mass of the cube = (3500)(3.375*10^-6) = 0.0118125 (kg)

Answer:

kya faltu sawal h repetitive g=10N/kg

The key difference between using a 5N Spring Scale and a 10N Spring Scale lies in their measurement range and sensitivity.

The 5N scale is more beneficial for measuring smaller objects with lower force requirements, while the 10N scale is better suited for objects that require greater force to measure.
A 5N Spring Scale can measure objects with a maximum force of 5 Newtons, providing more accurate readings for objects that fall within this range. On the other hand, a 10N Spring Scale is designed to measure objects with a force of up to 10 Newtons. When measuring objects with lower force requirements, using a 5N scale would result in more precise and accurate measurements, as it is specifically calibrated for smaller force values.

In summary, the choice between a 5N and a 10N Spring Scale depends on the force required to measure the objects in question. For objects with lower force requirements, a 5N Spring Scale would be more beneficial, providing more accurate and precise measurements compared to the 10N scale.

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Answer:

There are several ways to consider the composition of the human body, including the elements, type of molecule, or type of cells. Most of the human body is made up of water and H2O, with bone cells being comprised of 31% water and the lungs 83%.1  Therefore, it isn't surprising that most of the human body's mass is oxygen. Carbon, the basic unit for organic molecules, comes in second. 96.2% of the mass of the human body is made up of just four elements: oxygen, carbon, hydrogen, and nitrogen.

Explanation:

Elements are essential units that are the basic constituents of all living and non-living beings. They are the core of the universe. Every tiny or huge particle comprises elements. Our body is built up of five major elements: Carbon, Hydrogen, Oxygen, Nitrogen and calcium.

I) Tension in the spring = 2N

ii) Angular speed of the bung=5 rads-¹

iii) The time(T) it takes to make one complete revolution=1.256 seconds

Formula used to calculate the time(T) it takes to make one complete revolution = 2π √(l/g)

l = radius= 40cm = 0.4m

g = acceleration due to gravity = 10m/s-²

π =3.14( constant)

T = 2× 3.14 × √0.4/10

T = 6.28 ×√0.04

T = 6.28 × 0.2

T= 1.256 seconds

Formula to calculate angular speed(w)= 2π/T

where T= 1.256 secs

Therefore w = 2×3.14/1.256

w = 6.28/ 1.256

w = 5 rads-¹

Formula to calculate Tension in the spring(F)

= mrw²

where m= 200 g = 0.2kg

r = radius= 40cm = 0.4m

w = angular speed = 5 rads-¹

Therefore F = 0.2 × 0.4 × 5²

= 0.08 ×25

= 2N

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Answer:If the masses are different, the lighter ice skater will accelerate faster than the ice skater with more mass.

Explanation:

The lighter skater will accelerate more quickly than the heavier skater if there are mass discrepancies.

According to Newton's third law, the action and reaction forces in any force interaction must be equal and moving in the opposite directions. These pressures, nevertheless, affect a variety of items. In this case, each skater will experience the same amount of force, and if any other horizontal forces, such as friction, operating on each skater in the opposite direction from the pushing force are less than the pushing force, each will accelerate in that direction. The two skater system's center of mass will remain where it is if there is little to no friction to prevent the skaters from moving.

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Answer:

C (1.07 metres)

Explanation:

wavespeed = frequency x wavelength

rearrange for wavelength

wavelength = wavespeed ÷ frequency

so 320 ÷ 300 = 1.07m (rounded)

Answer:

biosphere

Explanation:

pretty sure bc it is ground

The magnetic field strength 1.0 cm away from the 1.0-m long, 1.0-mm diameter nichrome heater wire connected to a 12 V battery is approximately 1.26 × 10⁻⁴ T.

To find the magnetic field strength 1.0 cm away from the nichrome heater wire, follow these steps:

1. First, calculate the resistance (R) of the wire using its resistivity (ρ), length (L), and cross-sectional area (A). The formula for resistance is R = ρL/A. The area of a cylindrical wire can be found using the formula A = πd²/4, where d is the diameter of the wire.

2. Next, find the current (I) flowing through the wire using Ohm's Law, which states that I = V/R, where V is the voltage provided by the battery.

3. Finally, calculate the magnetic field strength (B) at a distance (r) from the wire using Ampère's Law, which states that B = μ₀I/(2πr), where μ₀ is the permeability of free space (4π × 10⁻⁷ T·m/A).

Now, let's apply these steps to our problem:

1. \(A = \pi (1.0 \times 10^{-3} m)^{2}  / 4 = 7.85 \times 10^{-7}  m^{2}\)
  R = (1.5 × 10⁻⁶ Ω·m)(1.0 m)/(7.85 × 10⁻⁷ m²) ≈ 1.91 Ω

2. I = 12 V / 1.91 Ω ≈ 6.28 A

3. \(B = (4\pi \times 10^{-7}  Tm/A)(6.28 A)/(2\pi (0.01 m)) = 1.26 \times 10^{-4}  T\)

So, the magnetic field strength 1.0 cm away from the 1.0-m long, 1.0-mm diameter nichrome heater wire connected to a 12 V battery is approximately 1.26 × 10⁻⁴ T.

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At a scenic overlook, you can hear an echo only if you shout in one particular direction because the presence of a suitable reflecting surface is necessary for the sound waves to bounce back and reach your ears as an echo.

Sound waves propagate through the air in all directions from their source, and they continue to spread until they encounter a surface. When the sound waves encounter a solid object, such as a wall, cliff, or other large structure, they can be reflected back toward the source. This reflection allows the sound waves to travel back to the observer's ears, creating an audible echo. In the case of the scenic overlook, there must be a surface in the specific direction where the sound waves can reflect off and return to the observer.

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The core of a highly evolved high mass star, depending on the type of stellar remnant, can be as small as the size of the Earth (for a white dwarf) or as compact as about 10 kilometers (for a neutron star).

The core of a highly evolved high mass star is typically a compact object known as a stellar remnant. There are two main types of stellar remnants that can form depending on the mass of the star: white dwarfs and neutron stars.

A white dwarf is the remnant of a star with a mass up to about 8 times that of the Sun. Its core is about the size of the Earth, which is much smaller compared to the original size of the star.

On the other hand, a neutron star is formed when a star with a mass greater than about 8 times that of the Sun undergoes a supernova explosion. The core of a neutron star is incredibly dense and compact, with a radius typically on the order of 10 kilometers (6.2 miles). Neutron stars are composed primarily of tightly packed neutrons and are extremely massive.

In summary, the core of a highly evolved high mass star, depending on the type of stellar remnant, can be as small as the size of the Earth (for a white dwarf) or as compact as about 10 kilometers (for a neutron star).

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Answer:

objects that is at rest will remain at rest and an objects in motion will remain in motion with the same velocity unless changed by an unbalanced force.

Explanation:

A moving body must undergo a change of position.

The concept of inertia states that an object will maintain its current motion unless a force changes its speed or direction. The phrase should be understood as a shortened form of Newton's first law of motion's description of "the principle of inertia."

The inertia of motion is the resistance offered by the body to continue to be in the uniform motion unless an external force acts on it.

Movement is a change in a body part's position in relation to the entire body. It is one of the key characteristics shared by all living things. Examples of movement include eating, breathing, and eye blinking. Therefore, we may conclude that at least one portion of our body moves in some way every second.

Hence, a  moving body must undergo a change of position.

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The resistance of the electric heating element can be determined using Ohm's law, which states that resistance (R) is equal to voltage (V) divided by current (I). In this case, the voltage across the element is given as 232 volts and the current flowing through it is 19 amperes. The correct option is 12 ohms.

Applying Ohm's law, we calculate the resistance as:

R = V / I

R = 232 volts / 19 amperes

R ≈ 12 ohms

Therefore, the resistance of the element is approximately 12 ohms. This means that for every ampere of current flowing through the element, there is a voltage drop of 12 volts. The resistance value of 12 ohms indicates that the element has a moderate level of electrical resistance, which allows it to generate heat efficiently when current flows through it. Thus, the correct option is 12 ohms.

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A train has an initial velocity of 44meter per second and an acceleration of 4meter per second.The final velocity after 10 seconds is 84m/s.

As we know,

Acceleration= Final velocity-Initial velocity /time.

where acceleartion = a=4m/s².

Initial velocity= u= 44m/s

let final velocity be v

Time =t = 10seconds.

Therefore, the equation is:

a=v-u/t

Substituting the values in the given equation, we get:

4=v-44/10

Now cross multiplying,

4×10 = v-44

40=v-44

40+44=v

v=84m/s

Therefore, the final velocity after 10 seconds is 84m/s.

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Answer:

Current, I = 0.000109 Amps

Explanation:

Given the following data;

Voltage = 6V

Resistance = 55,000 Ohms

To find the current flowing through the circuit;

Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.

Mathematically, Ohm's law is given by the formula;

\( V = IR\)

Where;

V represents voltage measured in voltage.

I represents current measured in amperes.

R represents resistance measured in ohms.

Making current the subject of formula, we have;

\( I = \frac {V}{R} \)

Substituting into the formula, we have;

\( I = \frac {6}{55000} \)

Current, I = 0.000109 Amps

Answer:

the work done by gravity on the boy is 604.62 J

Explanation:

Given;

distance the boy slides, d = 3 m

angle of inclination of the playground, θ = 40⁰

mass of the boy, m = 32 kg

The vertical height, h, above the ground through which the boy falls represents the height of the triangle which is the opposite side.

The distance through which the boy slides, d, represents the hypotenuse side of the right triangle.

\(sin \theta = \frac{opposite }{hypotenuse} \\\\sin \theta = \frac{h}{d} \\\\h = dsin\theta\\\\h = 3 \times sin(40^0)\\\\h = 1.928 \ m\)

The work done by gravity on the boy is calculated as;

W = P.E = mgh

             = 32kg x 9.8m/s² x 1.928m

             = 604.62 J

Therefore, the work done by gravity on the boy is 604.62 J

\(w = fdcos( \alpha )\)

\(w = fdcos(0)\)

\(100 = 10d \times 1\)

\( \frac{10d}{10} = \frac{100}{10} \)

\(displacement = 10 \: meters\)

240 seconds

Explanation:

If he walked to A and took 80 Seconds it should be the same amount of distance to B and C

The given sequence does converge. It converges to 4. To determine if the given sequence converges, we need to analyze its pattern.

The sequence is defined as {4- (3)}** n=0, where n represents the index of the term in the sequence. The expression within the braces, 4- (3), suggests that each term is obtained by subtracting 3 multiplied by the previous term from 4.

Let's calculate a few terms to observe the pattern:

Term 0: 4 - (3)* = 4 - 0 = 4

Term 1: 4 - (3)4 = 4 - 12 = -8

Term 2: 4 - (3)(-8) = 4 + 24 = 28

Term 3: 4 - (3)*28 = 4 - 84 = -80

From the calculations, it is clear that the sequence does not converge to a specific value. Instead, it oscillates between positive and negative values, never settling down to a single value. Therefore, the given sequence does not converge.

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Eddy believes that aliens make him walk 2 miles every day from his house to the store. this is an example of Hallucinations.

Hallucinations are sensory impressions that come from the mind yet seem realistic. Every one of the five senses may be affected by hallucination. One could, for instance, hear a voice that nobody else in the area can hear or see of a fake image. When someone is hallucinating, they will perceive things in their brains that they believe to be real but are actually not. Only the mind can produce these ideas. These symptoms could be brought on by medical conditions like seizures or alcoholic use problems, drug side effects, or mental diseases. The perception of hearing, smell, touch, vision, or physiological sensations may all be affected by hallucinations. A person may have hallucinations with or without knowledge that they are hallucinations. It is regarded as a psychotic sign when someone believes their delusion to be genuine.

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