What is the maximum power consumption of a 3.0 V portable electronic device that draws (max) 270 mA of current?

Answer:

2 charges of electron (2C)

Explanation:

I = Q/t

2 = Q/1

Q = 2×1= 2C

Q = 2 charge of electron

Answer:

the so-called alkali metals, the most used of all is potassium

Explanation:

The photoelectric effect is the expulsion of electrons from metals by effect of incident radiation.

To see this effect, materials with a small work function are needed, so the most used materials are the materials of group i of the periodic table, the so-called alkali metals, the most used of all is potassium

Answer:

Force = m a

Explanation:

Force is the quantity that relates mass of an object with its accelerate.

Final answer:

The acceleration of an object is directly proportional to the force applied and inversely proportional to its mass, as described by Newton's second law of motion (F = ma). Therefore, a less massive object will accelerate more than a more massive one when subjected to the same force.

Explanation:

The relationship between an object's mass and its ability to accelerate is a fundamental concept in Physics. According to Newton's second law, the acceleration (a) of an object is directly proportional to the net force (F) applied to it and inversely proportional to its mass (m), which can be expressed with the formula F = ma. This means for the same applied force, an object with less mass will accelerate more than an object with greater mass. As mass increases, more force is required to achieve the same acceleration.

Experiencing Mass and Acceleration

Our daily experience supports this relationship. Pushing a bicycle, which has less mass, results in more readily noticeable acceleration compared to pushing a car, which has more mass. The force necessary to change the motion of the car is significantly higher due to its greater mass.

Certain conditions must be met when applying Newton's second law. The object's velocity should be well below the speed of light, the force must be the total force accounting for all significant factors, and the observation must be made in an inertial reference frame. Within these parameters, we can accurately predict the impact of mass on an object's acceleration in response to a given force.

Answer:

The days are longer than during winter

Explanation:

In the summer, days feel longer because the Sun rises earlier in the morning and sets later at night. When the North Pole of the Earth is tilted toward the Sun, we in the northern hemisphere receive more sunlight and it's summer. ... It is also the day that the Sun reaches its highest point in the sky.

Explanation:

Momentum = mass × velocity

p = (65 kg) (5 m/s)

p = 325 kg m/s

Should be position 1.

1) 10.8 cm, shrunken

2) 19.7 cm

3) 8.8 cm

4) See explanation

Explanation:

1)

A mirror works on the principle of reflection: a ray of light coming from an object is reflected back by the mirror, producing an image of the object.

The position of the image can be found by using the mirror equation:

[tex]\frac{1}{f}=\frac{1}{p}+\frac{1}{q}[/tex]

where

f is the focal length of the mirror

p is the position of the object

q is the location of the image

In this problem:

f = 7 cm is the focal length of the mirror

p = 20 cm is the position of the object

So we can find q from the equation:

[tex]\frac{1}{q}=\frac{1}{f}-\frac{1}{p}=\frac{1}{7}-\frac{1}{20}=0.0929\\q=\frac{1}{0.0929}=10.8 cm[/tex]

The sign of q is positive: this means the image is real.

The magnification of the image is given by

[tex]M=\frac{y'}{y}=-\frac{q}{p}[/tex]

where

y' is the size of the image

y is the size of the object

M is the magnification

Substituting,

[tex]M=-\frac{10.8}{20}=-0.54[/tex]

Which means that he image is shrunken, (because [tex]|M|<1[/tex]), so [tex]y'<y[/tex].

2)

A lens works on the principle of refraction: the rays of light coming from an object are refracted into the focal point of the lens, and they can produce an image of the object.

We can solve the problem by using the lens equation:

[tex]\frac{1}{f}=\frac{1}{p}+\frac{1}{q}[/tex]

where

f is the focal length of the length

p is the position of the object

q is the location of the image

In this problem we have:

q = 51.5 cm is the location of the image

p = 32 cm is the position of the object

Solving for f, we find the focal length:

[tex]\frac{1}{f}=\frac{1}{32}+\frac{1}{51.5}=0.051\\f=\frac{1}{0.051}=19.7 cm[/tex]

3)

In this problem, we know the following data:

[tex]f=+17 cm[/tex] is the focal length (for a converging lens, it is positive)

[tex]y=5.5 cm[/tex] is the height of the object

[tex]y'=13.8 cm[/tex] is the height of the image

[tex]q=-22 cm[/tex] is the location of the image (it is negative because the image is virtual)

From the magnification equation, we can find the position of the object:

[tex]\frac{y'}{y}=-\frac{q}{p}[/tex]

And solving for p, the position of the object, we find:

[tex]p=-\frac{qy}{y'}=-\frac{(-22)(5.5)}{13.8}=8.8 cm[/tex]

So, the object should be located 8.8 cm from the lens.

4)

The images produced by a lens or by a mirror can be of two types:

Answer: 298800 metres

Explanation:

Given that:

speed of polar bear = 8.3 m/s

Distance traveled = ?

Time taken = 10.0 hours

Since the SI unit of time is seconds, convert time in hours to seconds

1 hour = 60 minutes & 1 minute = 60 sec

So, 10.0 hours = (10 x 60 x 60)

= 36000 seconds

Apply the formula:

speed = distance traveled / time taken

8.3 m/s = distance traveled / 36000 seconds

Distance traveled = 8.3m/s x 36000 sec

= 298800 metres

Thus, the polar bear traveled 298800 metres.

Answer: 62.86 coulombs

Explanation:

Resistance (R) = 210Ω

Voltage of battery (V) = 110V

total amount of charge (Q) = ?

Time (T) = 2 minutes

The SI unit of time is seconds so convert 2 minutes to seconds

(If 1 minute = 60 seconds

2 minutes = 2 x 60 = 120 seconds)

To get the total charge, first get the current (I) flowing in the circuit by applying the formula V = IR

110V = I x 210Ω

I = 110V/210Ω

I = 0.524 Amps

Then, apply the formula

Charge = current x time

i.e Q = IT

Q = 0.524 Amps x 120 seconds

Q = 62.86 coulombs

Thus, 62.86 coulombs of charge passes through the circuit.

Final answer:

To calculate the total amount of charge that passes through a point in the circuit in 2 minutes, we first find the current using Ohm's Law and then multiply by the time in seconds. The result is a total charge of 62.856 coulombs.

Explanation:

Calculating Total Charge in a Circuit

To find the total amount of charge that passes through a point in a circuit, we need to calculate the current first and then use the relationship between charge, current, and time. According to Ohm's Law, the current I in a circuit is given by the voltage V across the resistor divided by the resistance R of the resistor. In this case, with a 110V battery and a 210Ω resistor, the current is I = V/R = 110V/210Ω. Once we have the current, we can calculate the charge Q that passes through a point by multiplying the current by the time in seconds.

First, calculate the current: I = 110V / 210Ω ≈ 0.5238 A.

Next, convert the time given in the question from minutes to seconds: 2 minutes is 2 x 60 = 120 seconds.

Finally, multiply the current by the time to find the total charge: Q = I x time = 0.5238 A x 120 s = 62.856 C.

Therefore, the total amount of charge that passes through a point in the circuit in 2 minutes is 62.856 coulombs.

Answer:

B.) The glass and paper have different charges

Explanation:

Answer:  

The glass and paper have different charges

Explanation:

did the instruction on edge

The acceleration will be "3 mph/s".

According to the question,

Final velocity,

Initial velocity,

Time,

As we know the formula,

→ [tex]Acceleration =\frac{Final \ velocity-Initial \ velocity}{Time}[/tex]

By substituting the values, we get

→                       [tex]= \frac{45-15}{10}[/tex]

→                       [tex]= \frac{30}{10}[/tex]

→                       [tex]= 3 \ mph/s[/tex]  

Thus above answer is right.

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Answer:b

Explanation:the water will not be hot nomore because of the cold water

Answer:

compressions

Explanation:

compressions part of the wave are the particles of the medium closer together. Hence option B is correct.

Wave is is a disturbance in a medium that carries energy as well as momentum . wave is characterized by amplitude, wavelength and phase. Amplitude is the greatest distance that the particles are vibrating. especially a sound or radio wave, moves up and down. Amplitude is a measure of loudness of a sound wave. More amplitude means more loud is the sound wave.

Wavelength is the distance between two points on the wave which are in same phase. Phase is the position of a wave at a point at time t on a waveform. There are two types of the wave longitudinal wave and transverse wave.

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The geocentric model of the solar system was accepted because it made sense based on observations at the time. The heliocentric model became accepted later thanks to the work of Copernicus and Galileo.

The geocentric model of the solar system was accepted by scientists for many years because it appeared to make sense based on the observations at the time. In the geocentric model, Earth was believed to be at the center of the universe, with the planets and the Sun orbiting around it. This model was supported by the apparent motion of the celestial bodies in the sky.

For centuries, people observed that the Sun appeared to rise in the east and set in the west, while the planets seemed to move across the sky in different paths. The geocentric model provided a simple explanation for these observations. Additionally, there was a lack of evidence at the time to support an alternative model.

It was not until the 16th century, with the work of Nicolaus Copernicus and later Galileo Galilei, that the heliocentric model of the solar system started gaining acceptance. The heliocentric model, with the Sun at the center, provided a more accurate explanation for the motion of the planets, as well as other astronomical phenomena. The development of telescopes and advancements in observations also contributed to the acceptance of the heliocentric model.

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The geocentric model was accepted for years due to its ability to predict planetary motions and its alignment with religious and philosophical beliefs.

The geocentric model, which positioned Earth at the center of the universe, was accepted by scientists and scholars for many years due to a combination of observational, philosophical, and religious reasons.

Even when Greek astronomers suggested that it was more natural for smaller objects to revolve around larger ones, the Ptolemaic model persisted because it was able to predict planetary motion with reasonable accuracy through complex mechanisms like epicycles and deferents.

The geocentric model was further reinforced by the fact that it was embedded in the teachings of the Church, and the heliocentric idea faced significant resistance due to the societal and theological implications of displacing Earth from the cosmic center.

It was not until the works of astronomers such as Copernicus, Brahe, Kepler, and Galileo provided substantial evidence that the heliocentric model began to gain acceptance over the geocentric model.

Answer: 896J

Explanation:

Given that

Mass of motorcycle = 112kg

kinetic energy = ?

velocity of the motorcycle = 4m/s

Since kinetic energy is the energy possessed by a moving object, and it depends on the mass (m) of the object and the velocity (v) by which it moves. Therefore, the motorcycle has kinetic energy

i.e K.E = 1/2mv^2

KE = 1/2 x 112kg x (4m/s)^2

KE = 0.5 x 112 x 16

KE = 896J

Thus, the motorcycle has 896 joules of kinetic energy.

Explanation:

We know that F = ma

So given

Force (F) = 10N

Mass (m) = 1kg

Acceleration (a) = ?

We know

F = ma

10 = 1 * a

Therefore Acceleration = 10 m/s²

Answer:

10m/s2

Explanation:

Force = mass x acceleration

10 = 1 x a

Divide both sides by 1

10/1 = 1/1 x a

10 = a

a = 10m/s2

Answer:

the answer would be D. Yelling out in a cave and hearing your voice call back to you

Explanation:

Answer:

yes B is correct

Explanation:

Species A and C are related to humans. Therefore, the correct option is option B among all the given options.

A multicellular organism's embryo is the first stage of development. In sexually reproducing animals, gametophyte is the stage of the life cycle which thus begins immediately after implantation of both the female egg cell even by male sperm cell.

The resultant merger of these two cells results in a single-celled zygote which divides into cells are known as blastomeres. Species A and C are related to humans.

Therefore, the correct option is option B.

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Answer:

do

Explanation:

Answer: All major slopes at risk of mass wasting could be identified and monitored.

Answer:

Batteries use electrolytes and similar metals to produce a flow of electrons.

Answer:

D. Batteries convert chemical potential energy into electric energy

Explanation:

It was the correct answer on OW

Answer:

The electric force is [tex]6.2\cdot 10^{35}[/tex] times stronger than the gravitational force

Explanation:

The magnitude of the electrostatic force between two charges is given by:

[tex]F_E=k\frac{q_1 q_2}{r^2}[/tex]

where:

[tex]k=8.99\cdot 10^9 Nm^{-2}C^{-2}[/tex] is the Coulomb's constant

[tex]q_1, q_2[/tex] are the two charges

r is the separation between the two charges

In this problem:

[tex]q_1=1.6\cdot 10^{-19}C[/tex] (charge of the proton)

[tex]q_2=3.2\cdot 10^{-19}C[/tex] (charge of a nucleus of helium, twice the charge of a proton)

[tex]r=100 \mu m = 100\cdot 10^{-6} m[/tex]

So the electric force is

[tex]F_E=(8.99\cdot 10^9)\frac{(1.6\cdot 10^{-19})(3.2\cdot 10^{-19})}{(100\cdot 10^{-6})^2}=4.6\cdot 10^{-20} N[/tex]

Instead, the magnitude of the gravitational force between two objects is given by :

[tex]F_G=G\frac{m_1 m_2}{r^2}[/tex]

where

[tex]G=6.67\cdot 10^{-11} m^3 kg^{-1}s^{-2}[/tex] is the gravitational constant

m1, m2 are the masses of the two objects

r is the separation between them

Here we have:

[tex]m_1=1.67\cdot 10^{-27}kg[/tex] is the mass of the proton

[tex]m_2=6.68\cdot 10^{-27}kg[/tex] is the mass of a nucleus of helium (4 times the mass of the proton)

[tex]r=100 \mu m = 100\cdot 10^{-6} m[/tex] is the separation

So the gravitational force is

[tex]F_G=(6.67\cdot 10^{-11})\frac{(1.67\cdot 10^{-27})(6.68\cdot 10^{-27})}{(100\cdot 10^{-6})^2}=7.4\cdot 10^{-56} N[/tex]

So, we see that the electric force is much stronger than the gravitational factor, by a factor of:

[tex]\frac{F_E}{F_G}=\frac{4.6\cdot 10^{-20}}{7.4\cdot 10^{-56}}=6.2\cdot 10^{35}[/tex]

Answer:

It is a parallel connection

Explanation:

In parallel connection the

Cell is not easily used up because the cells share the total current generated together with all bulbs.

But a major problem is the bulbs must not be left together undisconnected to avoid exhaustion arising from short fall in the strength of one cell as this bounds to affect others

Answer:

parallel

Explanation:

Answer:

W and X

Explanation:

When escaping a rip current, one should always walk to the side until you escape from the rip current. If you walk towards the shore, you have the ability to keep getting dragged toward the current, such as with X and Y.

Answer:A

Explanation:

Answer:

A

Explanation:

Answer:

C. are bent when two charges interact.

Explanation:

took the quiz on A p e x

Answer:

5N

Explanation:

From Newton's third law, we understood that to every action, there is an equal an opposite reaction.

Since Arti's foot exerts a force of 5N on the ball, then, an equal and opposite force of 5N will be exerted on Arti's foot as understood from Newton's third law.

Therefore, a force of 5N will be exerted on Arti's foot.

Two forces interact when Arti kicks a football - Arti's foot exerts a 5N force on the ball, and the ball exerts a 5N force on Arti's foot.

When Arti kicks a football, two forces interact - Arti's foot exerts a force of 5N on the ball.

According to Newton's Third Law of Motion, for every action, there is an equal and opposite reaction. So, the ball exerts a force of 5N on Arti's foot in the opposite direction. Therefore, the size of the force exerted on Arti's foot is also 5N.

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Answer:

radiation

Explanation:

if there was no radiation there would be an iceage

Answer:

4386250J

Explanation:

In the picture above.

Hope this helps.

Final answer:

The kinetic energy of a truck with a mass of 2900 kg moving at 55 m/s is calculated using the formula KE = ½ mv², resulting in 4,386,250 joules (J).

Explanation:

To calculate the kinetic energy (KE) of a truck with a mass of 2900 kg moving at 55 m/s, we use the formula:

KE = ½ mv²

Where:

By plugging in the values:

KE = ½ (2900 kg) (55 m/s)²

KE = ½ (2900) (3025)

KE = 0.5 × 2900 kg × 3025 m²/s²

KE = 4,386,250 J

The kinetic energy of the truck is 4,386,250 joules (J).

Answer:

See the explanation below.

Explanation:

A rigid body is an ideal concept of a body that does not vary its shape or dimensions when subjected by external forces. In real life all bodies are deformed independent of the hardness or strength of the material, whether in very small values of millimeter. The hammer in this case is considered as a rigid body for practical cases of kinematics or Kinetics in physics and engineering studies.