7. Can the speed of a particle be negative? Can the
velocity of a particle be negative? Give arguments to
support your answers.
​

Answer:

It is facing away from the Earth.

Explanation:

If half of the moon is always illuminated by the sun, and we can't see the illuminated side during a new moon, the moon is turned away from the Earth.

To form cloud droplets in the sky, water vapour molecules must have a surface on which to adhere, a nucleus.

What is Cloud? Cloud is a combination of tiny water droplets or ice crystals that float in the air. Clouds are one of the sky's most beautiful and fascinating features. They come in a variety of forms, including white wispy cirrus clouds to big grey thunderclouds. These vapour droplets are very tiny, about 10 microns in diameter, and can be seen only when they reflect light. What is a nucleus? A nucleus is a tiny particle that serves as a foundation or centre around which other particles aggregate. Aerosols, like dust or salt, are frequently used as nuclei for cloud droplets to develop. It's also worth noting that a surface has to be stable to allow water droplets to form. A dust particle, for example, could be an excellent nucleus for water droplets to develop because it has a stable surface.

For more such questions on Cloud

https://brainly.com/question/30470077

#SPJ11

Light that is 10 w/m^2 in intensity and vertically polarized flows through a polarizer whose transmission axis is at a 15 degree angle with the vertical .Then the intensity of the transmitted light is 9.3 W/m^2.

After passing through a polarizing filter, the intensity of polarized light I is calculated as I = Io cos2, where Io is the initial intensity and is the angle formed by the filter's axis and the direction of polarization.

As is well known, the following equation can be used to determine the strength of transmitted light:

I = Iocos^2(θ),

where I denotes the amount of light being transmitted,

Io is the incoming light's intensity.

Given -

light input power intensity Io= 10 w/m^2

Per-square-meter power

α-15 degrees

In the equation above, by substituting the supplied numbers, we obtain -

I = Iocos^2(θ),

I= 10*cos^2(15)

I= 9.3 w/m^2

To know more about intensity of light visit:-

https://brainly.com/question/9195922

#SPJ4

When a force is applied to an object, it can cause a change in the object's motion or state of rest.

If the force is unbalanced, it can cause the object to accelerate or decelerate, resulting in a change in speed or direction. The effect of the applied force depends on the mass and nature of the object, as well as the magnitude and direction of the force. Additionally, the object may experience other effects, such as deformation or compression, depending on the type and direction of the force applied. Understanding the effects of applied forces is crucial in fields such as engineering, physics, and mechanics.

To know more about engineering, here

brainly.com/question/19117846

#SPJ4

--The complete question is, When force is Applied  on an object describe effect of action applied. --

Explanation:

substances have been in direct sunlight for up to 60 minutes. ... cool the fastest? ... 0.60 J/g °C. Match & then label each substance with its specific heat capacity ...

Answer:

think 2 also if not im so sorry  but i think it is :)

A obtained experimental is indeed a long, narrow chunk of stone that is extracted by drilling a hole through a rock with such a unique tool and lifting out an undamaged piece of the rock.

Work is being done on the thing as you lift it. The equation W = Fd describes the work W performed on an item by a constant force. It is determined by multiplying the force's intensity by how far the object is moved by the force.

Surface and body are no longer in contact when the body is lifted, eliminating any frictional forces. For the simple reason that friction opposes any relative motion between a surface and a substance (both are in contact).

To know more about lifting visit:

https://brainly.com/question/20068146

#SPJ1

In a circuit consisting of several resistors connected in series, the statement that is true is that the current flowing through each of them is the same. It is impossible to determine the power dissipated on each of them without knowing the actual magnitudes of the resistors.

When resistors are connected in series, the current flowing through the circuit is constant throughout. This means that the same amount of current passes through each resistor in the series.

This is a fundamental property of a series circuit, where the current encounters each resistor in succession. Therefore, the statement that the current flowing through each of the resistors is the same is true.

On the other hand, the power dissipated on each resistor depends not only on the current but also on the magnitude of the resistors themselves.

The power dissipated on a resistor can be calculated using the formula P = I²R, where P is the power, I is the current, and R is the resistance. Since the resistors in series may have different resistance values, it is impossible to determine the power dissipated on each resistor without knowing their individual resistances.

Therefore, the statement that the power dissipated on each of the resistors is the same is false. The power dissipated will vary depending on the individual resistance values.

Learn more about resistors here :

https://brainly.com/question/30672175

#SPJ11

Answer:  Make the frequency higher for number 1 and have the same amplitude.

Explanation: Wavelength and frequency are directly related so if you change one of those then you can't keep the other one the same. You would need to raise the frequency which would make 1 louder and keep amplitude the same for both so that 1 is louder.

To make the sounds match in pitch while making sound wave 1 louder than sound wave 2 : Increase the frequency for wave #1 while setting their amplitudes at the same value

The wavelength of a sound wave is inversely proportional to its frequency therefore when the frequency of wave 1 is increased its wavelength decreases with equal proportion.

Since the increase in frequency results to a decrease in wavelength. therefore to make wave 1 louder, both waves we will have to set the amplitude values of the waves at the same amplitude.

Hence we can conclude that to make the sounds match in pitch while making sound wave 1 louder than sound wave 2 ; Increase the frequency for wave #1 while setting their amplitudes at the same value.

Learn more : https://brainly.com/question/16051869

Earth has a definite orbit within the solar system whose the orbit is mainly a result of the mass of the Sun.

An orbit is defined as the regular, repeating path that one object in space takes around another while an object in an orbit is called a satellite which may be natural, such as the Earth or the Moon. According to the height of satellites from the earth, these orbit are classified as

Most of the weather and some communications satellites will tend to have a high Earth orbit which is farthest away from the surface. The main difference between orbit and orbitals is that the former is defined as a fixed path of electron revolutions, whereas the latter is defined as an uncertain region with a high probability of finding an electron.

Therefore, the Earth has a definite orbit within the solar system whose the orbit is mainly a result of the mass of the Sun.

Learn more about Orbits, here:

https://brainly.com/question/1371024

#SPJ6

Answer:

'brightness' and 'place' (?)

Explanation:

You can tell the distance in both simple and complicated ways; for instance, some methods like using luminosity don't work for all stars*

quote for better understanding:

"Farther methods are usually based on identifying what type of star a given star is, and estimating its luminosity .."

"..We then measure its apparent brightness (how bright it looks)* and do some math to figure out how far away it is."

(more detailed quote):

"By knowing the actual brightness and comparing it to the apparent brightness seen from Earth (that is, by looking at how dim the star has become once its light reaches Earth), they can determine the distance to the star."

Alternatively by observing the position of the star or its place a similar technique is used:

quote:

"Earth orbits the Sun, so it is in a slightly different position in January than in July. Nearby stars will seem to slightly shift in position in our sky relative to far-away stars."

In conclusion-- luminosity is commonly how astronomers know that stars are not all the same distance away from us.

Answer:

The ball of mass of 0.52 kg

Explanation:

By the second law of Newton, we get that the acceleration is equal to

a = F/m

Where F is the applied force and m is the mass.

So, the acceleration for each ball is equal to

For the ball with a mass of 0.52 kg

a = 26 N/0.52 kg

a = 50 m/s²

For the ball with a mass of 0.78 kg

a = 26 N/0.78 kg

a = 33.33 m/s²

Therefore, the ball with the greater acceleration is the ball with a mass equal to 0.52 kg

Explanation:

??

this question seems faulty.

The new normal force is greater than \(F_n\) as per the given data. The correct option is 1.

Friction is a force that prevents two solid objects from rolling or sliding over one another.

Although frictional forces, such the traction required to walk without slipping, may be advantageous, they can provide a significant amount of resistance to motion.

The normal force that the surface normally applies to the crate is perpendicular to the surface and works to balance the crate's weight.

The crate moves to the right when a force F is applied to it at an angle to the horizontal, and the normal force is adjusted to keep the crate in touch with the surface.

The formula for the normal force is FN = mg + Fsin(θ), where m is the mass of the crate, g is the acceleration due to gravity, and θ is the angle between the force F and the horizontal.

When θ is doubled, sin(2θ) = 2sin(θ)cos(θ), so the new normal force becomes:

FN' = mg + Fsin(2θ) = mg + 2Fsin(θ)cos(θ)

Since sin(θ) and cos(θ) are both less than or equal to 1, the second term on the right-hand side of the equation is greater than or equal to the original term Fsin(θ).

Thus, the new normal force is greater than the original normal force, and the correct answer is 1.

For more details regarding friction, visit:

https://brainly.com/question/13000653

#SPJ2

Your question seems incomplete, the probable complete question is:

A crate is on a horizontal frictionless surface. A force of magnitude F is exerted on the crate at an angle θ to the horizontal, as shown in the figure, causing the crate to slide to the right. The surface exerts a normal force of magnitude FN on the crate. While F is kept constant, the angle θ is now doubled but is still less than 90°. Assume the crate remains in contact with the surface. How does the new normal force exerted on the crate compare to FN ?

answer choices

Answer:

Another way electromagnetic (EM) waves are like ocean waves is that they both move energy from one place to another. The biggest difference between ocean waves and EM waves is that ocean waves move across water. Energy moves through the water. EM waves don't need anything to move through.

Explanation:

Answer:

30N

Explanation:

Projectile motion will be able to calculate how high something will go and how fast will it be going when it returns to its original position

Projectile motion is the study of projectiles and their motion. It is a branch of physics. A projectile is any object that moves under the action of a force, such as gravity or air resistance, that is not directly opposed to its motion.

The study of a projectile’s flight path in space can be used to determine the height and range it will reach by calculating its velocity, angle and gravitational forces.

Projectile motion will be able to calculate how high something will go and how fast will it be going because these are all related variables.

To learn more about projectile motion,

https://brainly.com/question/24216590

#SPJ4

Answer:

Informed consent

Explanation:

Informed consent is one of the many principles guiding the research practices and ethics. It allows participants to participate in a research knowing that they are aware of the pros and cons, terms and condition, and other necessary information guiding the research.

Informed consent itself has four fundamental principles guiding it:

i. Participants must be able to make the decisions of whether or not to participate.

ii. The researcher must provide and disclose every necessary information pertaining to the research.

iii. It must be ascertainable that the participants understand these information and the research itself.

iv. Participation must be voluntarily and under no circumstance must it pose any form of duress on the participants.

The magnitude of the frictional force between the tires and the road that allows the car to round the curve without sliding off in a straight line is 2000 N.

To calculate the centripetal force exerted on a car that rounds a radius curve on horizontal ground, we can use the following formula:

\(F = mv^2 / r\)

where F is the centripetal force, m is the mass of the car, v is its velocity, and r is the radius of the curve.

Without the frictional force, the car would slide off in a straight line due to its inertia, so the frictional force must be equal in magnitude and opposite in direction to the centrifugal force, which is the force that tends to pull the car away from the center of the curve.

The maximum static frictional force that can act between the tires and the road without causing the car to slip is given by:

f = μsN

where f is the frictional force, μs is the coefficient of static friction between the tires and the road, and N is the normal force acting on the car due to the road.

Since the car is traveling on a horizontal surface, the normal force is equal in magnitude to the weight of the car, which can be calculated as:

N = mg

where g is the acceleration due to gravity.

Combining the above equations, we get:

f = μsN = μsmg

The maximum value of the frictional force that allows the car to round the curve without sliding off in a straight line is equal to the centripetal force, which can be equated to mv^2/r, as shown earlier.

Therefore, we can write:

\(f = mv^2 / r\)

Equating this expression to the previous expression for f, we get:

\(mv^2 / r = μsmg\)

Solving for the frictional force, we get:

\(f = μsmg = mv^2 / r\)

\(f = (m/r) v^2\)

Substituting the given values, we get:

\(f = (m/r) v^2 = (1000 kg / 50 m) (10 m/s)^2\)

f = 2000 N

Therefore, the magnitude of the frictional force between the tires and the road that allows the car to round the curve without sliding off in a straight line is 2000 N.

Learn more about centripetal force

brainly.com/question/11324711

#SPJ11

Answer:

A

Explanation:

At constant speed, acceleration=0

From the formula, Fnet=ma (Resultant force= mass x acceleration), sub a=0

Fnet=0

Since the resultant force=0, the pushing force is equal to the frictional force

The sound pressure level produced within the roof void as a result of the plant room noise is calculated to be 48 dB.

To determine the sound pressure level in the roof void, we utilize the sound reduction index of the plant room wall and the sound pressure level in the plant room. The formula used for this calculation is L2 = L1 - R, where L2 represents the sound pressure level in the roof void, L1 denotes the sound pressure level in the plant room, and R signifies the sound reduction index of the plant room wall adjoining the roof void. Given that the sound pressure level in the plant room is 61 dB and the sound reduction index of the plant room wall is 13 dB, we substitute these values into the formula to find the sound pressure level in the roof void:

L2 = 61 dB - 13 dB

L2 = 48 dB

Hence, the sound pressure level produced within the roof void as a result of the plant room noise is determined to be 48 dB. To further reduce the sound pressure level from the plant room to the adjacent rooms, there are several recommended strategies. One approach is to improve the sound insulation of the common wall between the plant room and the adjacent rooms. This can involve increasing the sound reduction index of the wall by adding sound-absorbing materials or panels, or enhancing the sealing of any gaps or openings to minimize sound leakage.

To learn more about sound pressure level, Click here:

https://brainly.com/question/13155295

#SPJ11

Answer:

you can find answer in this

Explanation:

https://physics.nist.gov/cuu/Units/units.html

A. Since John has a mass of 65 kg and stands at rest on the ice, John's momentum is 0 Kgm/s.

B. The momentum of the ball is 50 Kgm/s.

C. The total momentum of the system is 50 Kgm/s. ​

Given the following data:

A. To find John's momentum:

Mathematically, momentum is given by the formula;

\(Momentum = Mass\) × \(Velocity\)

Substituting the given parameters into the formula, we have;

\(Momentum = 65\) × \(0\)

John's momentum = 0 Kgm/s.

b. To find the momentum of the ball:

\(Momentum = Mass\) × \(Velocity\)

Substituting the given parameters into the formula, we have;

\(Momentum = 10\) × \(5\)

Ball's momentum = 50 Kgm/s.

c. To find the total momentum of the system:

\(Total\; momentum = John's \;momentum + Ball's \;momentum\)

Substituting the values into the formula, we have;

\(Total\; momentum = 0 + 50\)

Total momentum = 50 Kgm/s.

Read more: https://brainly.com/question/23092552

Tenemos un problema de termodinamica sobre gases ideales, los cuales pueden ser descritos por la ecuación de estado del gas ideal

\(P*V = n*R*T\)

donde:

P = presión

V = volumen

n = número de moles

R = constante de los gases

T = temperatura.

1) Para el primer problema podemos pensar que el gas dentro del globo es un gas ideal:

Originalmente sabemos que n = 4 y V = 5.0 L

Entonces tendremos:

\(P*(5.0 L) = (4 moles)*R*T\)

Ahora decidimos agregar 8 moles más, dejando constante la presión y la temperatura, entonces podemos reescribir la ecuación de arriba como:

(5.0L)/(4 moles) = R*T/P

Y como R, T y P son constantes, entonces:

R*T/P es una constante.

Esto quiere decir que cuando agreguemos 8 moles, para tener un total de 12 moles, tendremos que:

V'/(12 moles) = R*T/P = (5.0L)/(4 moles)

Donde V' es el nuevo volumen final del globo, y es lo que queremos obtener.

V'/(12 moles) =  (5.0L)/(4 moles)

V' =   (5.0L)*(12 moles)/(4 moles) = (5.0 L)*3 = 15.0 L

2) Queremos obtener la densidad en gramos sobre litro de un gas con una masa molar de 60g/mol, a P = 0.75 atm y T = 25°C.

Primero pasemos la temperatura a grados kelvin:

T = 25°C = (25 + 273.15)°K = 298.15°K

Planteamos la ecuación del gas ideal:

\(P*V = n*R*T\)

reemplazando R = 0.082 (atm*L/mol*k), además de la presión y la temperatura para un solo mol de gas:

\((0.75 atm)*V = (1 mol)*(0.082 (atm*L/mol*k))*(298.15°K)\)

Resolviendo para V obtenemos que:

\(V = (1 mol)*(0.082 (atm*L/mol*k))*(298.15°K)/(0.75 atm) = 32.597 L\)

Así, vemos que un mol de este gas ocupa un volumen de  32.597 L

Y también sabemos que un mol de este gas pesa 60 gramos.

Recordando que la densidad es el cociente entre la masa y el volumen, podemos ver que la densidad del gas será:

\(d = 60g/(32.597 L) = 1.84 g/L\)

Si deseas leer mas sobre el tema, podes ver:

https://brainly.com/question/18528542

The flow velocity of the river is 2 mts/hour.

To solve the problem, we can use the formula:

v = d / t

Where,

v = the velocity of the river

d = the distance traveled by the log in the same time interval t as the boat.

Let's say the speed of the boat with respect to the water vb. [assume the speed of the boat with respect to the water is constant throughout the entire trip]

Assume, vb = 3 mts/hour.

The distance traveled by the boat upstream is 1.52 km + (91 min x 60 sec/min) x vb. The distance traveled by the log is 2 x 1.52 km. The time elapsed for the entire trip is 2 x 91 min x 60 sec/min.

So, v = (2 x 1.52 km) / (2 x 91 min x 60 sec/min)

Finally, v = vb - v.

Substituting the known values, we get:

v = vb - (2 x 1.52 km) / (2 x 91 min x 60 sec/min)

v = 3 - 1.00

v = 2 mts/hour

The velocity of the river is 2 mts/hour.

Here you can learn more about flow velocity

brainly.com/question/24543119

#SPJ4

Answer:

common glass

Explanation:

Answer:

11 protons and 10 electrons leaves a positive charge of one

Positive ions will migrate towards the negative cathode (cations)

C is correct

An atom is composed of electrons, protons and neutrons. Element in atomic state is neutral. The atom with 11 protons, 10 electrons and 13 neutrons is a cation with a net charge of +1.

Cation is a positive ion formed when an atom loses its electrons. The number charge it acquires is the number of electrons it lost. Anions are negative ions formed by accepting electron by an atom.

In a neutral atom the number of electrons and protons are same which means the all the positive charges are neutralized by exact number of negative charges.

If one proton dominates then the atom gets a positive charge and forms a cation. Similarly if one electron dominates in number it gets a negative charge and forms an anion.

The given atom have 11 protons and 10 electrons where, one proton is excess than the number of electron. Therefore one unit of net positive charge dominates there and forms a cation.

Hence option c a cation with net charge of +1 is correct.

To find more about cations, refer the link below:

https://brainly.com/question/28710923

#SPJ2

To most efficiently solve this problem, you should divide the rod into pieces of charge that consist of Thin slices of the rod cut perpendicular to the axes of the rod. Option C.

The electric potential is a magnitud used to obtain a measure of the electric field that a charge located at a point A can acquire.

The electric potential, V, of the electric field created by a point charge Q is obtained by means of the following expression,

V = k (Q/R)

Where

The electric potential can be created by one or many punctual charges.

If it is caused by many punctual charges in the electric field, the total electric potential, Vt, results from the addition of the electric potentials, Vn, at that point created by each of the charges separately.

Vt = V1 + V2 + V3 + .... + Vn

In the exposed example, there is a lineal distribution of charges along the rod.

So there is a rod of length L. This rod has a possitive charge Q distributed along its length.

There is an A point placed at a distance D from one of the rod extremes.

We need to find the way to calculate the Electric potential, V.

Vt = ∫ K dQ/R

where dQ is a charge differential = λ dL

So we need to place a charge differential, dQ, at any place along the rod. Then R will be the distance from the dQ to the point A.

The total V is the addition of many puntual V.

The best way to calculate it is option C. Thin slices of the rod cut perpendicular to the axes of the rod.

You will learn more about electric potential at

https://brainly.com/question/9383604