Match each letter to the description


A woman walks in a

straight line with the sun

to her right at six o'clock in

the morning. Toward

which pole does she walk?


A line of latitude.


A man walks in a straight

line with the sun to his

right at six o'clock in the

evening. Toward which

pole does he walk?


A line of longitude.

Answer:

a) acceleration

Explanation:

Acceleration is, by definition, the change of an object's velocity.

Answer:

Explained below.

Explanation:

Nurture is basically defined as the influence of external factors on an individual after such a person is born into this world. Examples include; exposure of such an individual, experiences of such an individual and this learned by the individual.

Thus explains human condition in the sense that for example, the environment one is exposed to could make one to have anxiety or could lead to depression or picking up diseases that are easily transmitted.

Also, things learned could have an effect on the behavior exhibited by an individual. If he was taught to be violent, he will likely grow up to be a violent person.

The height to which the spans rise when they buckle is 2.04 m

thermal expansion is given as :

ΔL = αLΔT

Where:

ΔL = change in length

α = coefficient of thermal expansion

L = original length

ΔT = change in temperature

Calculate  the change in length of the bridge spans:

ΔL = αLΔT

ΔL = (1.2 x 10^-5) x (400) x (20)

ΔL = 0.096 m

We apply Pythagorean theorem to find the height to which the spans rise when they buckle:

h^2 = (400 + 2ΔL)^2 - 400^2

h^2 = (400 + 2(0.096))^2 - 400^2

h^2 = 4.1664

h = 2.04 m

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Explanation:

Distance traveled by motorist =(15.0m/s)t

Distance traveled by policeman =1/2(2.00m/s2)t2

(a) Intercept occurs when 15.0t =t2or t=15.0s.

(b) x(officer)=1/2(2.00m/s2)t2= 225m

Answer:

11,700Newton

Explanation:

According to Newton's second law, Force = mass × acceleration

Given mass = 65kg.

Acceleration if the car can be gotten using one of the equation of motion as shown.

v² = u²+2as

v is the final velocity = 18m/s

u is the initial velocity = 0m/s

a is the acceleration

s is the distance travelled = 0.9m

On substitution;

18² = 0²+2a(0.9)

18² = 1.8a

a = 324/1.8

a = 180m/²

Net force acting on the body = 65×180

Net force acting on the body = 11,700Newton

Answer:

Periodic.

Explanation:

Electromagnetic waves is a propagating medium used in all communications device to transmit data (messages) from the device of the sender to the device of the receiver.

Generally, the most commonly used electromagnetic wave technology in telecommunications is radio waves.

Radio waves can be defined as an electromagnetic wave that has its frequency ranging from 30 GHz to 300 GHz and its wavelength between 1mm and 3000m. Therefore, radio waves are a series of repetitive valleys and peaks that are typically characterized of having the longest wavelength in the electromagnetic spectrum.

Basically, as a result of radio waves having long wavelengths, they are mainly used in long-distance communications such as the carriage and transmission of data.

Generally, a fixed speed is used for the propagation of traveling waves and this speed is usually denoted with the variable "v" or sometimes "c."

Furthermore, if the waveform of a traveling wave is repeated every time at specific intervals T, it is referred to as periodic wave.

Mathematically, the period of a traveling wave is given by the formula;

\( Period = \frac {1}{T} \)

Where;

T is the time measured in seconds.

Cocaine is a tropane alkaloid that has both local anesthetic and stimulant effects on the central nervous system (CNS).

Cocaine inhibits the re-uptake of dopamine, serotonin, and norepinephrine into pre-synaptic neurons by binding to the transport proteins for these neurotransmitters. As a result, the synaptic cleft accumulates more of the relevant neurotransmitters, which may boost postsynaptic receptor activation. Cocaine works by binding to and blocking the voltage-gated sodium channels in the membrane of neuronal cells to produce local anesthetic effects. Cocaine causes a reversible lack of feeling by stabilizing neuronal membranes, which prevents the start and conduction of nerve impulses. A benzoic acid ester, cocaine was first employed as a local anesthetic.

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Answer:

     l = 0.548 m

Explanation:

For this exercise we compensate by finding the speed of the car

         p = m v

         v = p / m

         v = 0.58 / 0.2

         v = 2.9 m / s

this is how fast you get to the ramp, let's use conservation of energy

starting point. Lowest point

         Em₀ = K = ½ m v²

final point. Point where it stops on the ramp

         \(Em_{f}\) = U = m g h

  mechanical energy is conserved

          Em₀ = Em_{f}

          ½ m v² = m g h

           h = \(\frac{m v^2}{2 g}\)

let's calculate

          h = \(\frac{0.2 \ 2.9^2}{2 \ 9.8}\)

          h = 0.0858 m

to find the distance that e travels on the ramp let's use trigonometry, we look for the angle

          tan θ = y / x

          tan θ = 12/75 = 0.16

          θ = tan⁻¹ 0.16

          θ = 9º

therefore

           sin 9 = h / l

           l = h / sin 9

           l = 0.0858 / sin 9

           l = 0.548 m

Answer:

true

Explanation:

this is because potienal energy is energy that is stored, and kinetic is energy being used, as kinetic is used, potential is also being used.

Answer:

1.7333333m/s²

Explanation:

Tension of the line = the weight + force from pulling up the fish

30N = mg + ma

30 = (6)(9.8) + (6)a

10.4 = 6a

∴ a = 1.7333333m/s²

You are fishing and catch a fish with a mass of 6 kg. If the fishing line can withstand a maximum tension of 30 N, the maximum acceleration is  1.7333333 m/s².

The rate at which an item changes its velocity is known as acceleration, a vector quantity. If an object's velocity is changing, it is acceleration.

Tension of the line = the weight + force from pulling up the fish

30 N = mg + ma

30 = (6)(9.8) + (6)a

10.4 = 6 a

a = 1.7333333 m/s²

You are fishing and catch a fish with a mass of 6 kg. If the fishing line can withstand a maximum tension of 30 N, the maximum acceleration is  1.7333333 m/s².

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Part 1)

Recall, for a body to remain in rotational and translational equilibrium, the net external torque and force acting on a system must be zero. The formula for calculating torque is

Torque = Force x moment arm

Let P be the force exerted by the hammer on the nail. For rotational equilibrium, the torque about the point of contact would be equal. Thus,

For the nail,

distance = 5.86 cm = 5.86/100 = 0.0586 m

moment arm = 0.0586mSin26 = 0.0257

Torque = P x 0.0257 = 0.0257P

For the handle,

Force = 125

perpendicular distance = 28 cm = 28/100 = 0.28

Torque = 125 x 0.28 = 35

By equation both torques,

0.0257P = 35

P = 35/0.0257

P = 1361.87 N

the force exerted by the hammer claws on the nail is 1361.87 N

Part 2)

The force exerted by the surface on the point of contact is the normal force, N

It would be equal to the total downward force. Since the claw is inclined,

Normal force = Downward force x Sinθ

Downward force = P = 1361.87

θ = 26

N = 1361.87Sin26

N = 597 N

the force exerted by the surface on the point of contact with the hammer head is 597 N

Explanation:

Isotopes are atoms with different atomic masses which have the same atomic number. The atoms of different isotopes are atoms of the same chemical element; they differ in the number of neutrons in the nucleus.

Answer:

The atoms of a chemical element can exist in different types. These are called isotopes. They have the same number of protons (and electrons), but different numbers of neutrons. Different isotopes of the same element have different masses.

Explanation:

If the racer keeps the same speed, it would take her approximately 71.94 seconds to run the next 400 meters.

If the racer keeps the same speed, it would take her approximately 289.56 seconds to run one mile.

FIRST CASE: To solve this problem, we can use the formula for average speed, which is:

average speed = distance / time

We can rearrange this formula to solve for time:

time = distance / average speed

In the first part of the problem, the racer ran 100 meters in 18 seconds. We can calculate her average speed as:

average speed = distance / time = 100 meters / 18 seconds ≈ 5.56 m/s

Now we can use this average speed to find the time it would take her to run the next 400 meters:

time = distance / average speed = 400 meters / 5.56 m/s ≈ 71.94 seconds.

SECOND CASE: We need to find the time it would take the racer to run the next mile. One mile is equal to 1609.34 meters. We can use the same formula as before, but this time we need to use the distance of one mile:

time = distance / average speed = 1609.34 meters / 5.56 m/s ≈ 289.56 seconds

Therefore, if the racer keeps the same speed, it would take her approximately 289.56 seconds to run one mile.

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The tax rate you will pay is displayed in tax brackets for each category of taxable income.

Thus, For instance, in 2022, the first $10,275 of your taxable income is subject to the lowest tax rate of 10% if you are single.

Up until the maximum amount of your taxable income, the following portion of your income is taxed at a rate of 12%.

As taxable income rises, the tax rate rises under the progressive tax system. Overall, this has the result that taxpayers with higher incomes often pay a greater rate of income tax than taxpayers with lower incomes.

Thus, The tax rate you will pay is displayed in tax brackets for each category of taxable income.

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Answer:

it is double the temperature change of iron

In a two-coil system, the induced potential difference in the secondary coil depends on the number of turns of wire (option B)

An electrical setup that features two distinct wire coils is known as a 'two-coil system,' inclusive of what's referred to as both its 'primary' and 'secondary' coils.

Typically these separate wire loops are wound tightly around one single central core material (often either iron or air-based). Power input links directly into its 'primary' counterpart whereas its 'secondary' element is typically associated with circuits/loads.

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Answer:

Control groups let the one who is expermenting compare  the effect of the varibles in the expermental group.

Explanation:

The block accelerates down the ramp due to the component of its weight that acts parallel to the ramp; this force has magnitude

(100 kg) g sin(26.6°) ≈ 438 N

(Note that the positive sign here means we take "down the ramp" to be the positive direction.)

Since the ramp is frictionless, this is the only force acting on the block in this direction. By Newton's second law, the block's acceleration is a such that

438 N ≈ (100 kg) a   ⇒   a ≈ 4.38 m/s²

The block accelerates uniformly, so that it attains a speed v as it moves 50 m such that

v² = 2a (50 m)

Solve for v :

v = √(2a (50 m)) ≈ 20.9 m/s

List these drinks in order of kinetic energy, starting with the drink whose particles have the highest kinetic energy:

hot chocolate > juice > milk > water.

The average kinetic energy of the particles in an object is measured by its temperature. The velocity of these particles likewise increases as the temperature rises.

A thermometer or a calorimeter is used to determine the temperature. In other words, a system's internal energy is determined by its temperature.

Hence, the kinetic energy of molecules is proportional to temperature of the liquid. So, list these drinks in order of kinetic energy:

hot chocolate > juice > milk > water.

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a. It takes 13.94 seconds to change your displacement by 18.0m east.

b. It takes 28.9 seconds to change your displacement by 32.0m north,

In geometry and mechanics, a displacement is described as a vector whose length is the shortest distance from the initial to the final position of a point P undergoing motion.

To change your displacement by 18.0m east, we use the

X direction = \(\frac{18}{1.70 cos 22.7}\)

x direction = 13.94 seconds

To change your displacement by 32.0m north, we use the

Y direction = \(\frac{32}{1.70 sin 22.7}\)

y direction= 28.9 seconds

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Answer:

288kj

Explanation:

The speed of the ball rebounding from the plate is approximately 13.2 m/s.

According to the graph, the greatest force exerted by the football on the force plate during impact is around 1900 N. The ball comes to a halt on the force plate before rebounding.

The kinetic energy of the ball before impact equals the kinetic energy of the ball after the rebound, according to the law of conservation of energy.

The speed of the ball rebounding can be calculated using the formula:

(1/2)mv²= (1/2)mv_0²

where m is the mass of the ball (0.43 kg), v is the speed of the ball rebounding, and v_0 is the initial speed of the ball (15 m/s).

Solving for v, we get:

v = sqrt(v_0² - (2F/m))

where F is the maximum force exerted on the force plate (1900 N).

Plugging in the values, we get:

v = sqrt(15² - (2*1900/0.43)) ≈ 13.2 m/s

Therefore, the speed of the ball rebounding from the plate is approximately 13.2 m/s.

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Answer:

un café y a seguir pensando porque no se la respuesta xd

Answer:

Ionic bonds form when a nonmetal and a metal exchange electrons, while covalent bonds form when electrons are shared between two nonmetals. An ionic bond is a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions.

Explanation:

hope this helps!

Answer:

For \(a > 0\), at \(t = a \; \text{second}\), the particle should have a velocity of \(\displaystyle -\frac{8}{a^3}\; \rm m \cdot s^{-1}\).

Explanation:

Differentiate the displacement of an object (with respect to time) to find the object's velocity.

Note that the in this question, the expression for displacement is undefined (and not differentiable) when \(t\) is equal to zero. For \(t > 0\):

\(\begin{aligned}v &= \frac{\rm d}{{\rm d}t}\, [s] = \frac{\rm d}{{\rm d}t}\, \left[\frac{4}{t^2}\right] \\ &= \frac{\rm d}{{\rm d}t}\, \left[4\, t^{-2}\right] = 4\, \left((-2)\, t^{-3}\right) = -8\, t^{-3} =-\frac{8}{t^3}\end{aligned}\).

This expression can then be evaluated at \(t = 1\), \(t = 2\), and \(t = 3\) to obtain the required results.

The magnitude of the force on the tooth is approximately 0.022 N.

To find the magnitude and direction of the force on the tooth, we can use Hooke's Law, which states that the force exerted on an object is directly proportional to the change in length of a material when it is stretched or compressed.

First, we need to calculate the strain (ε) of the stainless-steel wire.

Strain is defined as the change in length divided by the original length:

ε = ΔL / L₀

Given that the change in length (ΔL) is 0.10 mm \((0.10 \times 10^{-3} m)\) and the unstretched length (L₀) is 3.1 cm \((3.1 \times 10^{-2} m)\), we can calculate the strain:

\(\epsilon=(0.10 \times 10^{-3} m)/(3.1 \times 10^{-2} m)=0.003225\)

Next, we can use Young's modulus (E) to calculate the stress (σ) in the wire.

Stress is defined as the force per unit area:

σ = E * ε

Given that Young's modulus (E) for stainless-steel is 18 × 10¹⁰ N/m², we can calculate the stress:

σ = (18 × 10¹⁰ N/m²) * 0.003225 = 5.805 × 10⁸ N/m²

Now, we can find the force (F) on the tooth by multiplying the stress by the cross-sectional area (A) of the wire:

F = σ * A

The cross-sectional area (A) can be calculated using the formula for the area of a circle:

A = π * (d/2)²

Given that the diameter (d) of the wire is 0.22 mm\((0.22 \times 10^{-3} m)\), we can calculate the cross-sectional area:

\(A = \pi * (0.22 \times 10^-3 m / 2)^{2} = 3.802 \times 10^{-8} m^2\)

Finally, we can calculate the force:

\(F = (5.805 \times 10^{8} N/m^{2}) * (3.802 \times 10^-8 m^{2}) \approx 2.206 \times 10^{-2} N\)

Therefore, the magnitude of the force on the tooth is approximately 0.022 N.

Since the wire is stretched, the force is pulling the tooth in the direction opposite to the stretching.

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Given:

The frequency of the wave is f = 2766 kHz

The power is P = 35 kW

Required: Number of photons emit each second by the transmitting antenna.

Explanation:

Power and energy are related as

For each second the time will be t = 1 s

Also, the energy can be calculated by the formula

Here, Planck's constant is

On substituting the values, the number of photons each second will be

Final Answer: There are 1.92 x 10^(31) photons each second.

The statement that is true about the theory of plate tectonics and the theory of continental drift C. The theory of plate tectonics gives the method by which continents can move as part of plates .

According to the scientific hypothesis of plate tectonics, the underground movements of the Earth create the primary landforms. By explaining a wide range of phenomena, including as mountain-building events, volcanoes, and earthquakes, the theory, which became firmly established in the 1960s, revolutionized the earth sciences.

The scientist Alfred Wegener is most closely connected with the concept of continental drift. Wegener wrote a paper outlining his notion that the continents were "drifting" across the Earth, occasionally crashing through oceans and into one another, in the early 20th century.

According to tectonic theory, the Earth's surface is dynamic and can move up to 1-2 inches every year. The numerous tectonic plates constantly move and interact. The outer layer of the Earth is altered by this motion. The result is earthquakes, volcanoes, and mountains.

Therefore, option C is correct.

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Option C. The heat absorbed or lost by a substance while it's changing state  correctly describes latent heat

Latent heat is the heat absorbed or lost by a substance while it is changing state.

The latent heat is a type of heat that is transferred during phase change, i.e., while a substance undergoes a change of state.

For example, when ice melts into liquid water, or when liquid water evaporates into water vapor, heat is absorbed from the surroundings.

Latent heat is not associated with a temperature change; rather, it's associated with a change of state.

For instance, the temperature of water remains at 100°C while boiling.

When water is boiling, the latent heat of vaporization is absorbed and utilized to break the hydrogen bonds holding water molecules together to change water from the liquid phase to the gaseous phase.

When the water is boiling, adding more heat won't increase the water's temperature, instead, the extra heat will be absorbed to change the phase of water molecules.

Therefore, the correct answer to the given question is option C: The heat absorbed or lost by a substance while it is changing state.

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