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Answer:

0.1962N.

Explanation:

Weight is a force, so we use newtons second law which states F=ma. So the weight of a watermelon on earth is 2kg x 9.81m/s², which is 19.62N (newtons). On the moon it weighs 2 x 1.63 which is 3.26N.

The weight of the pen is 0.02 x 9.81, which is 0.1962N. If the pen is not to fall the frictional force needs to be equal to this force,

so the answer is 0.1962N.

(Hope this helps can I pls have brainlist (crown)☺️)

if u throw a ball straight up its speed decreases .

the shape of the ball would be curved

velocity : top is zero

Hello, love! The answer is True, or T, on Edge2020.

Hope this helped!

~ V.

Answer:

'Tis True my friends

Explanation:

Answer:

r=v/I=10/2=5

Explanation:

The answer is 5ohms

Answer:

5 seconds

Explanation:

sound travels 1 km in roughly 3 secs so 1 mile in roughly 5 secs.

The use of wire reference numbers is a common method to help differentiate wire reference numbers from other numbering systems. In electrical engineering, wire reference numbers are important to help identify different wires in a complex circuit.

A wire reference number is a specific identifier assigned to a wire, making it easier to trace and identify each wire in the circuit. They help technicians to quickly identify and repair faults in the wiring system.In a complex circuit with multiple wires, it becomes crucial to use a system of numbering to avoid confusion. A system of wire reference numbers provides a logical order and avoids the use of other numbering systems. With wire reference numbers, each wire has its own unique number which helps electricians to easily identify and trace a particular wire. This system is essential when a technician is repairing or working on a wiring system and has to follow the route of a particular wire.The wire reference number system ensures that every wire is unique and has a specific number to help differentiate it from other wires in the system. It makes it easier for electricians to track down faults in a system without damaging any other wires. The use of wire reference numbers is an important practice for maintaining safety and reliability in electrical systems.

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Answer:

1500J

Explanation:

w=f×s

50×30

=1500j

Work done on the trolley by the force is 1500 Nm

Work is done when energy is transferred from one form to other or work is also done when a force causes an object to move .

It can be calculated as

Work done = Force * displacement

Given

Force = 50 N

Horizontal distance = 30 m

Work done  = 50 N * 30 m

                    = 1500 Nm

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If you shine a blue light on a red apple, the apple would appear to be black or very dark. This is because the color of an object is determined by the wavelengths of light that it reflects.

. A red apple appears red because it reflects wavelengths of light that correspond to the color red, while absorbing other wavelengths. When a blue light is shone on the apple, the wavelengths of light that the apple would normally reflect are being absorbed by the blue light, making the apple appear to be a darker color.

This phenomenon is called subtractive color mixing, where the colors of objects are determined by the colors of the light that are absorbed, or subtracted, by the object.

In this case, the blue light is subtracting the colors that the apple would normally reflect, resulting in a darker appearance. It is important to note that the apple is still red, but the blue light is altering our perception of its color due to subtractive color mixing.

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Answer:

It's a strength or force

Explanation:

the quantity of motion of a moving body, measured as a product of its mass and velocity

Answer:

momentum is a quality define as the product of the mass and velocity of an object.

(a) Power required to overcome rolling resistance: P_r = (Fr * V) / 550 hp

Power required to overcome aerodynamic drag: P_d = (Fd * V) / 550 hp

(b) Plot power (P) versus vehicle velocity (V) using the calculated expressions for Pr and Pd.

(c) Higher speeds require more power to overcome resistive forces, leading to lower fuel economy. Maintaining moderate speeds is crucial for improved fuel efficiency.

(a) To determine the power required to overcome rolling resistance and aerodynamic drag, we need to calculate the respective forces and then multiply them by the vehicle velocity.

The rolling resistance force, Fr, is given by the equation Fr = f * W, where f is the rolling resistance coefficient and W is the vehicle weight. Substituting the given values, we have Fr = 0.02 * 3550 lbf.

The aerodynamic drag force, Fd, is given by the equation Fd = 0.5 * Cd * A * rho * V^2, where Cd is the drag coefficient, A is the projected frontal area, rho is the air density, and V is the vehicle velocity. Substituting the given values, we have Fd = 0.5 * 0.34 * 23.3 ft^2 * 0.08 lb/ft * V^2.

To calculate the power required, we multiply the respective forces by the vehicle velocity and convert the units from lbf-ft/s to horsepower (hp). The power required to overcome rolling resistance is P_r = (Fr * V) / 550 hp, and the power required to overcome aerodynamic drag is P_d = (Fd * V) / 550 hp.

(b) To plot the power versus vehicle velocity, we can use the given range of 0 to 75 mi/hr. For each velocity value, substitute it into the equations for Pr and Pd calculated in part (a) and plot the corresponding power values on the graph.

(c) The implication for vehicle fuel economy can be deduced from the results of part (b). The power required to overcome both rolling resistance and aerodynamic drag increases with vehicle velocity. This indicates that at higher speeds, more power is needed to overcome the resistive forces, resulting in higher fuel consumption. Therefore, the fuel economy of the vehicle will likely decrease as the velocity increases, highlighting the importance of maintaining moderate speeds for improved fuel efficiency.

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Answer:

They have holes that are positively charged

Explanation:

There are two types of semiconductors i.e. p-type and n-type.

p-type is a type of semiconductor that is formed when a trivalent impurity is added to an intrinsic semiconductor like silicon or germanium. Boron (B), Gallium (Ga), Indium(In), Aluminium(Al) etc are trivalent impurities. Due to this combination, a large number of holes are created in it.

Hence, p-types of semiconductors have holes that are positively charged.

Answer:

light always moves in straight lines

The surface charge density on the large charged non-conducting sheet can be calculated using the angle θ between the silk thread and the sheet, along with the mass of the small sphere and its charge. A diagram is necessary to visualize the setup.

Consider a small sphere of mass m and charge q hanging from a silk thread, making an angle θ with a large charged non-conducting sheet. To calculate the surface charge density on the sheet, we need to consider the electrostatic equilibrium of the system.

In this setup, the electrostatic force on the charged sphere is balanced by the tension in the silk thread. The weight of the sphere is balanced by the vertical component of the tension, and the electrostatic force is balanced by the horizontal component of the tension. These two components can be expressed as Tsinθ and Tcosθ, respectively.

The electrostatic force between the charged sphere and the sheet can be expressed as F = kqσA, where k is the Coulomb's constant, q is the charge on the sphere, σ is the surface charge density on the sheet, and A is the area of the sheet.

By equating the horizontal component of the tension to the electrostatic force, we have Tcosθ = kqσA. Rearranging the equation, we can solve for σ, which gives σ = (Tcosθ)/(kqA).

In summary, the surface charge density on the large charged non-conducting sheet can be calculated by dividing the horizontal component of the tension in the silk thread (Tcosθ) by the product of Coulomb's constant (k), the charge on the small sphere (q), and the area of the sheet (A).

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Answer:

Saturn is almost as big as Jupiter despite its smaller mass because Jupiter is a more dense gas giant than Saturn.

Explanation:

Expectation value of position in the x-direction, ⟨X^⟩: We apply the position operator, X^, to the wavefunction and integrate:

⟨X^⟩ = ∫ xψ(x, y) dx dy = ∫ xNexp(-2σ^2x^2)exp(-2σ^2y^2) dx dy

To find the expectation values for the position and momentum operators, we need to apply the corresponding operators to the wavefunctions and integrate over the appropriate variables.

a) For the wavefunction ψ(x, y) = Nexp(-2σ^2x^2)exp(-2σ^2y^2):

Expectation value of position in the x-direction, ⟨X^⟩: We apply the position operator, X^, to the wavefunction and integrate:

⟨X^⟩ = ∫ xψ(x, y) dx dy

= ∫ xNexp(-2σ^2x^2)exp(-2σ^2y^2) dx dy

Similarly, we can find the expectation values ⟨Y^⟩, ⟨P^x⟩, and ⟨P^y⟩ by applying the respective operators and integrating over the variables x and y.

b) For the wavefunction φ(x, y) = Nexp(iay)exp(-2σ^2(x-d)^2)exp(-2σ^2y^2):

We follow the same procedure as in part a) to find the expectation values ⟨X^⟩, ⟨Y^⟩, ⟨P^x⟩, and ⟨P^y⟩ for the wavefunction φ(x, y).

The expectation values provide us with information about the average positions and momenta of the particle in the x-y plane for each wavefunction. By calculating these expectation values, we can gain insights into the behavior and properties of the particle in the given states.

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The total electric potential will be 4.50 ×10⁴ V. The potential difference is the difference in electric potential between two charged substances.

The amount of work performed in an electrical field to move a unit charge from one location to another is defined as the electrical potential difference.

The distance between all charges and the center is the same. The 10,500 mC, 11.50 mC, 21.00 mC, and 20,500 mC charges neglect each other's potentials.

Hence, the total electric potential will be 4.50 ×10⁴ V.

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In a space with hyperbolic geometry, the behavior of parallel lines differs from that of Euclidean geometry.

In hyperbolic space, parallel lines diverge from each other as they extend further.If two initially parallel flashlight beams traverse billions of light-years of space in a hyperbolic geometry, they will gradually diverge from each other. The divergence between the beams will increase as they travel a greater distance.

This phenomenon is a consequence of the non-Euclidean geometry of space. In hyperbolic space, the curvature causes parallel lines to "spread out" or diverge. The extent of the divergence will depend on the specific curvature of the space and the distance traveled.

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Answer:

Newton's first law of Inertia.

Explanation:

This explains how a magician is able to remove a tablecloth from under dishes and glasses on the table without disturbing them. Because of the mass of the object, it remains in inertia. The Tablecloth, in this trick, is slippery so that it does not have any real friction with glasses and dishes.

Answer:

Acceleration → Change in velocity divided by time.

Proportional → Net force and acceleration

Inversely Proportional → Mass and acceleration

Net force Not Equal to zero → Driving a car up the on-ramp of the freeway

Net force Equal to zero → Driving a car with cruise control on, straight down.

Acceleration → Net force divided by mass

Force → Mass times acceleration.

Explanation:

Below we will explain each choice.

A) Acceleration by means of the following expression of kinematics is defined as the change of velocities in a given time.

\(a=\frac{v_{f}-v_{o}}{t}\)

where:

a = acceleration [m/s²]

Vf = final velocity [m/s]

Vo = initial velocity [m/s]

t = time [s]

B)

Newton's Second Law tells us that the sum of forces in a body is equal to the product of mass by acceleration so we have the following expression.

F = m*a

where:

F = force [N] (units of Newtons)

m = mass [kg]

a = acceleration [m/s²]

As we can see in the previous equation The Force is proportional to the acceleration, that is to say, every time the acceleration increases or decreases this same will happen with the force, increases or decreases.

C)

In Newton's second law we see an inversely proportional relationship, which is best seen if we clear the term of acceleration.

\(a=\frac{F}{m}\)

In any mathematical expression where a term is in the denominator, we can say that this is inversely proportional to the term to the left of the equal sign.

D)

When a vehicle climbs a hill or climbs a slope, forces such as the weight of the vehicle act in the opposite direction to the movement, so the sum of the forces cannot be equal to zero.

E)

When a vehicle moves on a track at a constant speed that is to say at cruising speed, we say that its acceleration is zero, therefore the sum of the forces acting on the moving vehicle is equal to zero.

F)

Acceleration is defined as the relationship between Force and mass

\(a =\frac{F}{m}\)

G)

Force is defined as the product of mass by acceleration.

F = m*a

When an object is released with an initial velocity upward, the direction of its acceleration is typically downward.

This is because the force of gravity, which acts on the object, pulls it in the opposite direction to its motion. According to Newton's second law of motion, the net force on an object is equal to its mass multiplied by its acceleration. In this case, the force of gravity acts as the net force, causing the object to accelerate downward.

The acceleration due to gravity is approximately 9.8 meters per second squared on Earth, and it acts downward towards the center of the planet. Therefore, when the object is released with an initial velocity upward, the gravitational force causes it to decelerate and eventually change direction, resulting in a downward acceleration. This downward acceleration opposes the initial upward velocity of the object until it eventually reaches its peak and starts to fall back down under the influence of gravity.

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Given data:

* The current through the system is I = 3 A.

* The resistance of resistors connected in parallel is,

Solution:

The equivalent resistance of the system is,

Substituting the known values,

By taking inverse value,

According to Ohm's law, the voltage across the battery is,

Substituting the known values,

Thus, the voltage across the battery is 11.25 volts.

Answer:   Eat only when you're truly hungry instead of when you are tired, anxious, or feeling an emotion besides hunger.

Plan meals ahead of time to ensure that you eat a healthy well-balanced meal.

Keep more fruits, low-fat dairy products (low-fat milk and low-fat yogurt), vegetables, and whole-grain foods at home and at work.

Explanation:

Answer:

I know that some foods have a lot of sugar. I read online that I don’t need any more than 25 grams of added sugar a day. One kind of pop that I like to drink has 40 grams of sugar per can. I can start by drinking less pop. Next, I learned that some food makers are now putting nutrition keys on the front of their boxes. I love all kinds of breakfast cereal, so I can use the nutrition key to compare brands. Cereal high in fiber is good, but cereal high in sugar isn’t. I’ll be more careful, too, when ordering fast food. Sometimes fast-food places want to change the size of my order from medium to large for a higher price. From now on, I won’t pick the bigger meal. Picking the medium-sized meal should be better for me and can even save me money.

Explanation: Plato

The area of the coil and the variation in the magnetic field both affect the induced current. The area A that each loop in a coil of wires adds to the right-hand side of the equation ensures that the induced emf is proportionate to the number of loops in the coil.

Imagine a flux line going straight into each of the x's on the board when a coil of wire attached to an ammeter is set in a steady magnetic field. The Coil Area slider can be moved to change the coil's area, which changes the area inside the coil through which the magnetic field is passing. There is an electric current generated when the slider is moved, as indicated by the ammeter, and the direction of the current is indicated by the ammeter reading (positive or negative) and the accompanying black arrows. Observe that the speed at which you change the coil form slider affects how soon the ammeter responds.

Given that an induced current's intensity largely depends on when the coil is adjusted quickly, the magnetic flux changes more quickly than when it is adjusted slowly, giving rise to higher values on the ammeter.

If a conducting loop is subjected to a fluctuating magnetic field, a current can be induced in the loop. The magnetic field's strength can be changed, the conductor can be moved in and out of the field, the distance between a magnet and the conductor can be changed, or the area of a loop in a steady magnetic field can be altered. Whatever method is used to create the variation, the end consequence, an induced current, remains the same. According to Faraday's law of induction, the current's intensity will fluctuate in direct proportion to the change in magnetic flux.

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Answer:

The scale diagram is in the image attached

Explanation:

The scale diagram is in the image attached.

The North direction is upwards in the diagram, the West is to the left, the East is to the right and the South is downwards.

First movement: 550m north -> 5.5 cm upwards

Second movement: 350m west -> 3.5 cm to the left

Third movement: 250m south -> 2.5 cm downwards

Fourth movement: 450m east -> 4.5 cm to the right

Fifth movement: 150m south -> 1.5 cm downwards

Hope it helps!

A satellite travels at a constant speed, its shape is a circle.

An integrated receiver and transmitter of radio signals known as a transponder, a satellite is essentially a self-contained communications system that can receive signals from Earth and retransmit those signals back to Earth.

The three primary parts of a satellite are the propulsion system, which includes the rockets that move the satellite, the power system, which includes the solar panels that supply power, and the communications system, which includes the antennae and transponders that receive and retransmit signals. To enter into the proper orbit and periodically adjust its position, a satellite needs a propulsion system of its own.

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Answer:

yes

Explanation:yes

Answer:

Yes

Explanation:

Earth is accelerated around the sun