List four conditions that may result in the emission of electrons from a conductor.

Refer to the attachments

Note that

Like charges attract each other and unlike charges repel each other

Student 2 is correct. The Benz is not traveling at constant velocity. At the end of two seconds the speed would have increased by 4.4 m/s.

The final velocity of the benz is determined by using first kinematic equation;

v = u + at

where;

v = 2.2 + (2.2 x 2)

v = 6.6 m/s

Δv = 6.6 m/s - 2.2 m/s = 4.4 m/s

Thus, student 2 is correct. The Benz is not traveling at constant velocity. At the end of two seconds the speed would have increased by 4.4 m/s.

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The maximum force that the athlete exerts on the bag is NEGATIVE 1,500 N and in the OPPOSITE DIRECTION of the force that the bag exerts on the athlete.

Newton's third law of motion states action and reaction are equal and opposite. That is the force applied to an object is equal in magnitude to force experienced by the object but in opposite direction.

From the given question, when the bag exert a certain on the athlete, the athlete also exerts similar force to the bag but in opposite direction.

Thus, the complete sentence is as follows;

The maximum force that the athlete exerts on the bag is NEGATIVE 1,500 N and in the OPPOSITE DIRECTION of the force that the bag exerts on the athlete.

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Answer:

The solar eclipse stopped years ago due to the moon, sun, and earth's alignment not being able to sync like it did before.

I do not agree with the statement 'theoretical capacity of a process is the reciprocal of the theoretical flow time of the process' because time is only one variable.

The theoretical capacity of a process can be defined as the ability to perform a given work in a given period of time.

The theoretical capacity of a process is not only dependent on the time that takes to carry out but also on other variables (e.g., temperature, light conditions, etc).

In conclusion, I do not agree with the statement 'theoretical capacity of a process is the reciprocal of the theoretical flow time of the process' because time is only one variable.

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The time taken by the train will be 13.84 sec. Time taken is the ratio of the distance and speed.

Distance is a numerical representation of the distance between two objects or locations.

Distance can refer to a physical length or an estimate based on other factors in physics or common use. |AB| is a symbol for the distance between two points A and B.

Distance is found as the product of the speed and velocity.

Distance = speed × time

time = Distance/speed

time= 1275 (m)/92.1( m/sec)

time(t) =13.84 sec

Hence, the time taken by the train will be 13.84 sec

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Answer

When you are riding in a coaster car that is traveling at a constant speed, you only feel the downward force of gravity. But as the car speeds up or slows down, you feel pressed against your seat or the restraining bar. You feel this force because your inertia is separate from that of the coaster car.

Explanation:

Answer:

A & C

Explanation:

Answer:

A and C

Explanation:

Answer:

"Both students are correct. When light is traveling through small openings, solids, liquids, gases, or a vacuum, it behaves like a wave. When it interacts with matter, it acts like a stream of particles."

Explanation:

just got it right

Answer:

static electricity is a flowing charges

Answer:

Average speed = 2.5 mph

Distance = 22.352 meters

Explanation:

Calculate speed, distance or time using the formula d = st, distance equals speed times time.

Calculate speed, distance or time using the formula d = st, distance equals speed times time.

You can use this formula for any question like this

Answer:

The answer is C.

Explanation:

Answer:

[tex]\huge\boxed{\sf Option \ 3}[/tex]

Explanation:

[tex]\rule[225]{225}{2}[/tex]

The electrostatic force between these electrons will be 2.3×10⁻²⁰ N.

The force of attraction between two charges, according to Coulomb's law, is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

Charges that are similar repel each other, whereas charges that are diametrically opposed attract each other.

They will repel, moving in opposite directions at the same speed. Because the magnitude and nature of the charge are same.

The electrostatic force between these electrons is;

[tex]\rm F= \frac{Kq_1q_2}{r^2} \\\\ F=\frac{9 \times 10^9 \times -1.6 \times 10^{-19} \times- 1.6 \times 10^{-19} }{(0.10 \times 10^-3)^2} \\\\F= 2.3 \times 10^{-20} \ N[/tex]

Hence, the electrostatic force between these electrons will be. 2.3×10⁻²⁰ N.

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When two charged plates are separated by a distance, the potential difference between the plates is 54 Volts.

The electric field intensity which does not increase or decrease with time or remain constant is called the uniform electric field.

Given is the plates separated by distance d = 15 cm =0.15 m, electric field E= 360 N/C.

The relation between the electric field and voltage is

E=V/d

Substitute the values into the expression to get the potential difference V,

V = 360 x 0.15

V = 54 Volts

Thus, the potential difference between the plates is 54 Volts.

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The motorcycle's average velocity will be 20 m/sec. The ratio of the overall distance traveled to the total time taken by the body is the average velocity.

The average velocity is the ratio of the total distance traveled to the total time taken by the body. Its unit is m/sec.

V= 72km/hr =20 m/sec

Total distance travelled by the  motorcycle;

D= v ×t

D=(20 m/sec)×20 sec

D=400 m

The average velocity is:

[tex]\rm v_{avg}=\frac{d_{total}}{t_{total}} \\\\ \rm v_{avg}=\frac{400}{20} \\\\ v_{avg}=20 m/sec[/tex]

Hence,the motorcycle’s average velocity will be 20 m/sec.

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Answer:

1. 2 m/s/s

Explanation:

Formula

Force = Mass x Acceleration

The thin atmosphere of Mars is thought to be due to the planet's lack of a magnetic field, which has allowed the Solar wind to blow away much of the gas the planet once had. Venus, despite still having a thick atmosphere of CO2, surprisingly has a similar problem

Answer:

f λ = c = 3.00E8      frequency * wavelength = speed of light

λ = c / f = 3.00E8 / 4.0E14 = 7.5E-7 m

Note 1 angstrom = 1.00E-10 m and 1 milli-micron = 1.00E-9 m

So the wavelength would be 7500 angstroms

The visible spectrum is 4000 A - 7000 A  or 400 - 700 milli-microns

The frequency of the ultraviolet light given that its wavelength is 100 nm is 3×10¹⁵ Hz

The frequency of the light can obtain as illustrated below:

v = λf

3×10⁸ = 100×10¯⁹ × f

Divide both side by 100×10¯⁹

f = 3×10⁸ / 100×10¯⁹

f = 3×10¹⁵ Hz

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a)The time taken between the parcel leaving the airplane, and it's striking the ground will be 6.38 second

c)The speed at which the parcel strikes the ground will be 62.64 m/sec.

Speed is defined as the rate of change of the distance or the height attained. it is a time-based quantity. it is denoted by U for the initial speed while V for the final speed. its SI unit is m/sec.

The given data in the problem is;

Steady speed (V)= 90 m/s

Altitude (h) = 200 m

Time taken (t)=?

horizontal distance travelled(d)=?

Striking speed(V)=?

The striking speed is;

[tex]\rm V^2=U^2+2gh \\\\ V=\sqrt{2gh} \\\\V=\sqrt{2\times 9.81 \times 200} \\\\ V= \sqrt{3924} \\\\ V=62.64 \ m/sec[/tex]

The time taken is found as;

[tex]\rm H = ut + \frac{1}{2} gt^2 \\\\ 200=0+ \frac{1}{2} \times 9.81 \times t^2 \\\\ t=6.38 \ sec[/tex]

Hence, the time taken between the parcel leaving the airplane, and it's striking the ground will be 6.38 second

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Answer:

678908765456789

Explanation:

Answer:

The impulse experienced by the object equals the change in momentum of the object. In equation form, F • t = m • Δ v. In a collision, objects experience an impulse; the impulse causes and is equal to the change in momentum.

Explanation:

When A 0.025 kg piece of clay is thrown into a wall and has a speed of 9 m/s before it strikes the wall then change in momentum 22.5 kg.m/s² is and impulse is 0.225 Ns.

Momentum is defined as product of mass and velocity of the body. It is denoted by letter p and it is expressed in kg.m/s.

Mathematically p = mv.

it discuss the moment of the body. body having zero mass or velocity has zero momentum.

The dimensions of the momentum is [M¹ L¹ T⁻¹].

Given,

mass of the clay = 0.025 Kg

Speed of the clay = 9m/s

The momentum of clay is P = mv = 0.025×9 =0.225 kg.m/s

In this problem a piece of clay having mass 0.025 Kg, velocity of clay is 9m/s.

By using formula,

change in momentum of the clay = dp/dt

We must know about change in time in order to calculate change in momentum with respect to time.

Consider that the change in momentum is 0.01s.

dp/dt = p₂-p₁/t₂-t₁ = 0- 0.225/0.01 = 22.5 kg.m/s²

Impulse = dp/dt×Δt = 22.5×0.01 = 0.225 Ns

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The depth of the crack along the aeroplane wing is determined as 1.5 m.

The depth of the crack in the wing from which the echo is heard is calculated as follows;

d = (vt)/2

From the image;

d1 = (5000 x 0.4 x 10⁻³)/2

d1 = 1 m

d2 = (5000 x 0.8 x 10⁻³)/(2)

d2 = 2 m

Average depth

d = (d1 + d2)/2

d = (1 + 2)/2

d = 1.5 m

Thus, the depth of the crack along the aeroplane wing is determined as 1.5 m.

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Answer:The answer is 2

The order of band in which the light becomes the brightest is n = 0.

Diffraction is the phenomena of the spreading of waves around obstacles. Diffraction occurs in electromagnetic radiation, such as light, X-rays, and gamma rays, etc.

When light waves pass near a barrier they tend to bend around that barrier and become spread out.

The order bands n=2 becomes dimmest due to the spreading out of the light wave.

Thus, the order of band in which the light becomes the brightest is n = 0.

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n = 0 is correct for edge. :)

Answer:

False

Explanation:

A graphic organizer is a written out explanation of similarities and differences among topics. A graphic organizer is a visual representation. Another name for a chart is "Venn diagram." Compare and contrast graphic organizers identify only similarities among sets of information.

Volume?

Let's see

Volume:-

Answer:

2. ( b ) zero

3. ( c ) 10 s

4. Uniform then decreasing

Explanation:

2.

Since the motion is uniform, initial and final velocity will be 0, hence acceleration will be zero.

3.

Initial velocity ( u ) = 5 m/s

Final velocity ( v ) = 35 m/s

Acceleration ( a ) 3 m/s^2

To find : Time ( t )

Formula : -

t = v - u / a

 = 35 - 5 / 3

 = 30 / 3

t = 10 s

Answer:

See below ~

Explanation:

Q2

The uniform circular motion in the movement of object in a circular path with fixed and perpendicular on the direction of the motion acceleration.

Q3

Q4

The vertical component for a projectile by acute angle on the horizontal axis changes from decreasing then increasing velocity.

Answer:

It passes another car that travels southward at 60 km/h. Do both cars have the same speed? Do they have the same velocity? Answer: Both cars have the same speed, but they have opposite velocities because they are moving in opposite directions.

Explanation:

Answer:

See below ~

Explanation:

As the magnitude (absolute numerical value) of both cars are equal, they both have the same speed.

But, as they are travelling in opposite ways, they have different directions. Hence, they have different velocities.