Most battery-powered devices won?t work if you put the battery in backward. But for a device that you plug in, you can often reverse the orientation of the plug with no problem. Part A Explain the difference. a. You can often reverse the plug in the wall because it is an AC. However, a battery is a DC. b. Battery-powered devices are low-powered. c. Battery-powered devices have many defects in their construction d. You can often reverse the plug in the wall because it is a DC. However, a battery is an AC.

Answer:

A physic term

Explanation:

Answer:

Cambio de lugar o de posición de un cuerpo en el espacio.

Explanation:

Predisposition is the Biological and environmental factors that relate to schizophrenia are integrated in the 16 model of schizophrenia.

The correct answer is "predisposition". Schizophrenia is a complex mental disorder that has been studied extensively by researchers. It is believed to be caused by a combination of genetic and environmental factors. The predisposition to develop schizophrenia may be inherited genetically, but environmental factors such as exposure to stress, trauma, or substance abuse can trigger the onset of symptoms. There is also evidence to suggest that the evolution of the human brain may play a role in the development of schizophrenia, as it involves a delicate balance between neural circuits that govern perception, cognition, and emotion. While there is no cure for schizophrenia, early diagnosis and treatment can help manage symptoms and improve quality of life. it can be said that understanding the interplay between biological and environmental factors is crucial for developing effective interventions and improving outcomes for individuals with schizophrenia.

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Answer:

7. 20,000,000 mL.

8. 8,000 m.

9. 120,000 secs.

10. 4

Explanation:

7. Determination of the volume in millilitres (mL)

Volume in litre (L) = 20,000 L

Volume in millilitres (mL) =..?

The volume in mL can be obtained as follow:

1 L = 1,000 mL

Therefore,

20,000 L = 20,000 x 1,000 = 20,000,000 mL.

Therefore, 20,000 L is equivalent to 20,000,000 mL.

8. Determination of the distance in metre (m)

Distance in mile = 5 mile

Distance in metre =?

First, we shall convert from mile to kilometre.

This can be done as follow:

1 mile = 1.6 km

Therefore,

5 mile = 5 x 1.6 = 8 km

Finally, we shall convert 8 km to metre (m).

This is illustrated below:

1 km = 1,000 m

Therefore,

8 km = 8 x 1,000 = 8,000 m

Therefore, 5 miles is equivalent to 8,000 m.

9. Determination of the time in seconds.

Time = 400 minutes for 5 days.

First, we shall convert 400 mins to hour.

This is illustrated below:

60 minutes = 1 hour

Therefore,

400 mins = 400/60 = 20/3 hours

The time (hours) is 20/3 hours in 1 day.

Therefore, the time (hours) in 5 days will be = 20/3 x 5 = 100/3 hours.

Next, we shall convert 100/3 hours to minutes.

This is illustrated below:

1 hour = 60 minutes

Therefore,

100/3 hours = 100/3 x 60 = 2000 mins

Finally, we shall convert 2000 mins to seconds.

This is illustrated below:

1 mins = 60 secs

2000 mins = 2000 x 60 = 120,000 secs.

Therefore, the time is 120,000 secs.

10. Determination of the number of significant figures.

To obtain the significant figures of a number, we simply count all the numbers available.

Therefore, the number of significant figures for 9876 is 4.

Answer:

the process of that happening is called Dissolving

the substance that is dissolved is called

Solute

It takes the ball 3.06 seconds to reach its highest point

The time it takes for a ball to reach its highest point is given by the equation:

t = v / g

where

In this case, the initial velocity is 30.0 m/s and the acceleration due to gravity is \(9.8 m/s^2\). Therefore, the time it takes for the ball to reach its highest point is:

\(t = 30.0 m/s / 9.8 m/s^2 = 3.06 s\)

Therefore, it takes the ball 3.06 seconds to reach its highest point.

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Answer:

2838

Explanation:

It is generally knowledge that sound waves may bend around corners or pass through doorways, enabling us to hear conversations taking place in nearby rooms.

The air on the opposing side of the barrier also vibrates as a result of the audio hitting the wall. You will be able to hear some sound through a sturdy, solid wall since it won't spread the vibrations too much.

A reflecting wave is created as a sound crosses a room and collides with a wall, reintroducing some of that waveform back into the space. The originating sound will endeavor to go through the wall and into the next space. Sound Transmission is the name for the energy that remains after this transmission.

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Answer:

6 cm

Explanation:

When 4 cm from the mirror the image is 4 cm behind the mirror.  

When the mirror is moved 1 cm towards the man the man is now 3 cm from the mirror and his image is also 3 cm from the mirror.

Thus the distance between the man and his image is now 3+3 = 6 cm.

The moment caused by the 2 kg mass placed at a distance of 0.5 m to the left of the pivot is 1 kg m. This moment is anticlockwise.

Moment is a physical parameter equal to the product of the distance or displacement and another physical quantity such as mass, force etc.

For a mass of 2 kg and distance of 0.5 m the moment is  :

moment = mass × distance

= 2 × 0.5 = 1 kg m

If we are taking the moment of force, then it the product of the distance and force acting on the body is taken.

force = mg

F =  2 kg × 9.8 m/s² = 19.6 N

then moment of force = 19.6 N × 0.5 m = 9.8 N

The moment from left to right in direction is anticlockwise.

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Increasing human population have advanced the problem of the impact of humans on the environment as shown above.

We know that the environment has to do with our natural surroundings. The environment has to do  with that space that is around us from which we obtain the materials and energy that are necessary to support life.

We know that the greatest pressure that is placed on the environment and the resources that is in it comes from anthropogenic activities. These are the activities of the people that live within the environment. The extraction of resources for the provision of energy as well as construction pts great pressure on the environment

As we look at the image, we call to mind that the the explosions in the population of human beings have put more pressure on the environment and thus made it unable to support the human population.

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Answer:

The main cause Is that more light energy from the sun is transfered to the ground of Eastbrook and the energy then move to the air that is above Eastbrook.

Explanation:

Different in air Temperature is caused by combination of water, air and land working hand in hand. The water, air and land cause heating and cooling of different areas at different rates. Also there are differences in temperature in different places base on seasons or time of the year. As you move higher in a place or a mountainous area tend to have high temperature than the ocean.

The kind of scanning that uses ultrasonic with a display of both structure and motion with time is called ultrasonic motion imaging.

This technique uses high-frequency sound waves to generate images of internal structures and also captures the motion of those structures in real-time. Ultrasonic motion imaging is commonly used in medical imaging to visualize the movement of organs such as the heart, and in industrial applications to detect motion in machinery and materials.

A medical imaging technology called ultrasound motion imaging, sometimes referred to as ultrasound imaging or sonography, employs high-frequency sound waves to provide live images of the body's internal organs and structures. It is frequently applied to diagnose in order to evaluate various illnesses and anomalies.

A transducer sends high-frequency sound waves into the body during an ultrasound checkup. The transducer picks up echoes produced when these sound waves hit the tissues and organs. A computer then transforms the echoes into visual images and displays them in real time on a monitor.

With the aid of ultrasonic motion imaging, moving objects can be seen, including the heart pumping and blood flowing through channels.

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By the processes of heat transfer, the sidewalk absorbs heat by radiation and cooks the egg.

Heat energy is a form of energy that is due to difference in temperature between two bodies.

Heat energy always flow from hotter to colder bodies

The processes of heat transfer include;

The sidewalk absorbs heat by radiation and cooks the egg.

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Answer:

absorption

Explanation:

In the thermal equilibrium, the change in temperature is said to be zero in between the bodies. Thermal equilibrium is reached when both objects have the same temperature.

Thermal equilibrium is easily explained by the zeroth law of thermodynamics. If any two-body is at thermal equilibrium there is no change in the temperature of the body.

According to zeroth law if body A is in thermal equilibrium with body B and body B is in thermal equilibrium with C . So body A and C are also in thermal equilibrium.

In the thermal equilibrium, the net heat transfer is said to be zero in between the bodies.

Hence option A IS RIGHT. Thermal equilibrium is reached when both objects have the same temperature

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Answer:

75.1 m/s

Explanation:

vf = vo + at

d = do + vo t  + 1/2 a t^2    <====use this to find time...

then use this 'time' in the first equation to find  vf

590.39 = 0 + 25.88 t + 1/2 (4.21) t^2     Use Quadratic Formula

                to find     t = 11.69 s

Now use the first equation:

vf = 25.88 + 4.21 (11.69) = 75.1 m/s

The average velocity in terms of acceleration and time is 1/2at².

Average velocity:

Velocity is the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time.

Assume the acceleration a is uniform then:

v(t) = u + at

u = initial velocity

By average velocity v we mean average over time than strictly speaking:

v = 1/t \(\int\limits^t_0 {v(t)} \, dt\)

  = 1/t \(\int\limits^t_0 {(u + at)} \, dt\)

  = 1/t ( ut + 1/2 at²)

 v = u + 1/2at²

If u =0, then we have

v = 1/2 at²

Therefore the average velocity is 1/2at².

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The sun is Yellow, red, orange, and blue. Therefore option B is correct.

The star is moving toward an observer. Therefore option B is correct.

39. The type of radioactive decay represented by the equation provided Gamma. Therefore option A is correct.

40. The statement is completed correctly by the information which states that the coal in Alberta has a lower carbon content than coal in other parts of Canada, resulting in reduced greenhouse gas emissions.

29. graph B depicts the relationship between gravitational field strength and the mass of the International Space Station orbiting Earth.

30. The correct sequence of colors representing the changing temperature from the surface to the atmosphere of the sun is Yellow, red, orange, and blue. Therefore option B is correct.

1. When a star undergoes a blue shift, it indicates that the star is moving toward an observer. Therefore option B is correct.

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Answer:

a) Time = 2.67 s

b) Height = 35.0 m

Explanation:

a) The time of flight can be found using the following equation:

\( x_{f} = x_{0} + v_{0_{x}}t + \frac{1}{2}at^{2} \)   (1)

Where:

\( x_{f}\): is the final position in the horizontal direction = 80 m

\( x_{0}\): is the initial position in the horizontal direction = 0

\(v_{0_{x}}\): is the initial velocity in the horizontal direction = 30 m/s

a: is the acceleration in the horizontal direction = 0 (the stone is only accelerated by gravity)

t: is the time =?  

By entering the above values into equation (1) and solving for "t", we can find the time of flight of the stone:  

\( t = \frac{x_{f}}{v_{0}} = \frac{80 m}{30 m/s} = 2.67 s \)

b) The height of the hill is given by:

\( y_{f} = y_{0} + v_{0_{y}}t - \frac{1}{2}gt^{2} \)

Where:

\( y_{f}\): is the final position in the vertical direction = 0

\( y_{0}\): is the initial position in the vertical direction =?

\(v_{0_{y}}\): is the initial velocity in the vertical direction =0 (the stone is thrown horizontally)            

g: is the acceleration due to gravity = 9.81 m/s²

Hence, the height of the hill is:

\( y_{0} = \frac{1}{2}gt^{2} = \frac{1}{2}9.81 m/s^{2}*(2.67 s)^{2} = 35.0 m \)  

I hope it helps you!

The equation that describes the motion of the buoy in simple harmonic motion can be written as:

y(t) = A * cos(ωt + φ)

Where:

- y(t) is the displacement of the buoy from its equilibrium position at time t.

- A is the amplitude of the motion, which is half the total distance traveled by the buoy, so A = 14 feet / 2 = 7 feet.

- ω is the angular frequency of the motion, which is calculated as ω = 2π / T, where T is the period of the motion. In this case, the period is 5 seconds, so ω = 2π / 5.

- φ is the phase constant, which represents the initial phase of the motion. Since the high point corresponds to the time t = 0, we can set φ = 0.

Therefore, the equation that describes the motion of the buoy is:

y(t) = 7 * cos((2π/5)t)

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Consequently, the refraction angles for red and violet light are 46.5° and 46.0°, respectively.

The difference between the speed of light in a vacuum and that in a medium, denoted by the letters c and c', is known as the index of refraction (n): The propagation vector in the new medium has a different angle with respect to the normal when light travels from one medium to another at an angle as a result of this speed difference. In optics, an optical media's refractive index—a dimensionless number that indicates how well the medium bends light—is used to measure that medium's optical properties. When light enters a substance, its refractive index influences how much of its path is bent.

A material's refractive index, which is quantified, indicates how much a light path is bent or refracted when it penetrates that material. The critical angle for total internal reflection and the amount of light that is reflected when it reaches the contact are both determined by the index of refraction.

For light of a specific color and a specific set of media, the sine of the angle of incidence to the sine of the angle of refraction ratio is constant.

According to Snell's law.

The formula for Snell's law is

n=sini/sinr

I stands for incidence angle.

The refraction angle is r.

The medium's refractive index is n.

For red light,

n=sini/sinr

1.331=〖sin75〗^°/sinr

sinr=〖sin75〗^°/1.331

r=〖sin〗^(-1) (0.7258)

r=46.5°

Consequently, the red light refraction angle is 46.5°.

For violet light,

n=sini/sinr

1.342=〖sin75〗^°/sinr

sinr=〖sin75〗^°/1.342

r=〖sin〗^(-1) (0.7197)

r=46.0°

Consequently, the violet light's angle of refraction is 46.0°.

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a beam of white light goes from air into water at an incident angle of 75o. at what angles are the red (660 nm) and violet (410 nm) parts of the light refracted? Red light in water has an index of refraction equal to 1.331 and that of violet light is 1.342.

By using uniform motion, the displacement of a fallen crate after 2.9 seconds is  41.209 meters.

We need to know about uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule

vt = vo + a . t

vt² = vo² + 2a . s

s = vo . t + 1/2 . a . t²

where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.

From the question above, we know that

t = 2.90 s

vo = 0 m/s

a = g = 9.8 m/s²

By substituting the given parameters, we can calculate the displacement with the third equation

s = vo . t + 1/2 . a . t²

s = 0 . 2.9 + 1/2 . 9.8 . 2.9²

s = 0 + 41.209

s = 41.209 m

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Answer:

False

Explanation:

The internet uses various mediums (fibre optic being only one of the newer ones) to transfer information.

Answer:

60 kWh

Explanation:

The computation of the annual energy consumption in KW-h is shown below:

As we know that

1 kw = 1000 w

So, for 1400 W it would be

= 1,400 ÷ 1,000

= 1.4 kW

Now the number of hours it used in a year

= 7 minutes × 365 days ÷ 60 minutes

= 42.58333 hours

So in one year it used

= 1.4 kW × 42.58333

= 59.61 kWh

= 60 kWh

The density of the planet can be determined using the period of the satellite's orbit and the radius of the orbit.

In a circular orbit, the centripetal force required for the satellite to maintain its orbit is provided by the gravitational force between the satellite and the planet. The centripetal force is given by the equation:

F = (mv^2) / r

where m is the mass of the satellite, v is the velocity of the satellite, and r is the radius of the orbit.

The period of the orbit, T, is related to the velocity and radius by the equation:

T = (2πr) / v

Rearranging this equation gives us:

v = (2πr) / T

Substituting this expression for v into the centripetal force equation, we have:

F = (m(4π^2r) / T^2) / r

The gravitational force between the satellite and the planet is given by:

F = G(Mm) / r^2

where G is the gravitational constant, M is the mass of the planet, and m is the mass of the satellite.

Setting these two equations equal to each other, we can solve for the mass of the planet, M:

G(Mm) / r^2 = (m(4π^2r) / T^2) / r

Simplifying and rearranging, we find:

M = (4π^2r^3) / (GT^2)

The density, ρ, of the planet is given by:

ρ = M / V

where V is the volume of the planet. Assuming the planet is a perfect sphere, we have:

V = (4/3)πr^3

Substituting the expression for M and V, we can solve for the density:

ρ = (3T^2) / (4πG)

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The magnetosphere is a region around the Earth that is influenced by the planet's magnetic field, which acts as a shield for the planet's atmosphere against the solar wind, cosmic rays, and other charged particles that are constantly bombarding it.

The Earth's atmosphere is protected by its magnetic field, which is generated by the motion of molten iron in the planet's core, as well as the magnetic fields of other planets, stars, and galaxies that it interacts with.

In summary, the Earth's magnetosphere serves as a barrier that deflects the charged particles of the solar wind and other cosmic rays away from the planet's atmosphere, preventing them from stripping away the gases and protective layers that make up the Earth's atmosphere. Thus, the magnetosphere is critical in maintaining the habitability of Earth by protecting the planet's atmosphere and maintaining its life-sustaining conditions.

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