Please Help! id really appreciate it thanks!

Answer:

Plzzzz answer fast......

Answer:

Explanation:

a. The frequency increases.

b. The period increases.

c. The frequency stays the same.

d. The period stays the same

Answer:

4.28 s

Explanation:

after two seconds (2 s) His friends is

d = 3.5 m/s x 2 s = 7 meter ahead.

in this state, a bicylist start from initial velocity vo = 0 m/s and accelerat 2.4 m/s²

then, when bicylist reach his friend

t friend = t bicyclist = t

d bicylist = d friend + d

-------

d friend = 3.5 . t

d bicylist = vo . t + ½ a t²

d friend + d = vo . t + ½ a t²

3.5 t + 7 = 0 . t + ½ . 2.4 . t²

3.5 t + 7 = 1.2 t²

0 = 1.2 t² - 3.5 t - 7

t = -1.363 and t = 4.28

take the positive one

Answer:

V = I * R        voltage drop

P = I * V = I^2 * R        power

I = P / V = 327 / 15 = 21.8 amps

b)   I = 21.8 amps

a) R = P / I^2 = 327 / 21.8^2 = .69 ohms

Check:

V = I R = 21.8 * .69 = 15 Volts

Main Answer:The momentum chart after the decay is as follows:

Piece 1: P1

Piece 2: P2

Piece 3: P3

Supporting Question and Answer:

What is the relationship between the total momentum before and after the decay of a nucleus into three pieces?

The total momentum before the decay is equal to the total momentum after the decay, according to the principle of conservation of momentum.

Body of the Solution:To fill out the momentum chart for the decay of a nucleus into three pieces, we need to consider the conservation of momentum. Assuming the system is isolated and no external forces act on it, the total momentum before the decay should be equal to the total momentum after the decay.

Let's denote the momenta of the three pieces as P1, P2, and P3, and the total momentum as P_total.

Before Decay (Initial State):

After Decay (Final State):

The total momentum before the decay is 0, and the total momentum after the decay is the sum of the momenta of the three pieces:

P_total = P1 + P2 + P3

Therefore, the momentum chart after the decay is as follows:

Piece 1: P1

Piece 2: P2

Piece 3: P3

Total Momentum: P_total = P1 + P2 + P3

Final Answer:Thus,, the momentum chart after the decay is as follows:

Piece 1: P1

Piece 2: P2

Piece 3: P3

Total Momentum: P_total = P1 + P2 + P3

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The momentum chart after the decay is as follows:

Piece 1: P1

Piece 2: P2

Piece 3: P3

The total momentum before the decay is equal to the total momentum after the decay, according to the principle of conservation of momentum.

To fill out the momentum chart for the decay of a nucleus into three pieces, we need to consider the conservation of momentum. Assuming the system is isolated and no external forces act on it, the total momentum before the decay should be equal to the total momentum after the decay.

Let's denote the momenta of the three pieces as P1, P2, and P3, and the total momentum as P_total.

Before Decay (Initial State):

Nucleus: Momentum = 0 (at rest)

After Decay (Final State):

Piece 1: Momentum = P1

Piece 2: Momentum = P2

Piece 3: Momentum = P3

The total momentum before the decay is 0, and the total momentum after the decay is the sum of the momenta of the three pieces:

P_total = P1 + P2 + P3

Therefore, the momentum chart after the decay is as follows:

Piece 1: P1

Piece 2: P2

Piece 3: P3

Total Momentum: P_total = P1 + P2 + P3

Thus,, the momentum chart after the decay is as follows:

Total Momentum: P_total = P1 + P2 + P3

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A horizontal line in a vs t graph shows that the change in acceleration with time is 0.

The acceleration-time graph depicting the acceleration as a function of time for a particle traveling in a straight line is shown below. Acceleration values are plotted on the y-axis of the acceleration-time graph, while time values are plotted on the x-axis.

On the graph of acceleration vs time, the horizontal line indicates that there has been no change in acceleration with respect to the passage of time. The magnitude of the acceleration maintains its original value regardless of the passage of time. This kind of acceleration is referred to as either uniform acceleration or constant acceleration.

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1. The doorknob is at a higher electric potential than John's body, creating an electric potential difference.

2. As John moves his hand closer to the doorknob, the electric potential difference and the amount of charge transferred increase.

3. The applet focuses on the movement of negative charges (electrons) rather than positive charges.

4. The flow of electrons generated by rubbing the carpet and the doorknob will eventually cease as the charges reach equilibrium, and it is not a sustainable source of power for a calculator.

1. The doorknob is at a **higher electric potential** than John's body. When John moves the rightmost leg back and forth, it induces a separation of charges. The negative charges accumulate on John's body, while positive charges accumulate on the doorknob. This creates an electric potential difference, and since charges naturally move from higher to lower potential, the doorknob has a higher electric potential than John's body.

2. The amount of charge on John's body and the distance between his hand and the doorknob are related. As John moves his hand closer to the doorknob, the electric potential difference between them increases. According to Coulomb's law, the electric force between two charges is directly proportional to the product of their magnitudes and inversely proportional to the square of the distance between them. Therefore, as the distance decreases, the electric force and the amount of charge transferred increase.

3. The applet does not show positive charges because it focuses on the movement of negative charges (electrons). In most electrical phenomena, such as static electricity or everyday electrical circuits, the flow of electrons is the primary concern, so the applet emphasizes the behavior of negative charges.

4. While John can generate a steady stream of electrons from the carpet to the doorknob through rubbing, this process cannot power your calculator for long because the electrons eventually reach equilibrium. Once the doorknob and the carpet reach the same electric potential, there will be no further flow of electrons. In other words, the charges will be evenly distributed, and the flow will cease. Additionally, the electrons that leave the carpet and accumulate on the doorknob may eventually dissipate through various means, such as conduction or leakage currents.

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Explanation:

Measurement plays an important role in our daily lives because they are useful to do basic tasks, such as taking the temperature of a child with the help of a thermometer,making time estimations,measure out medicines and find out weights, areas and volumes of different substances

Answer:

1. B

2. C

WELCOME!!

Explanation:

I have had the same thing for school and I got it correct :(

The exact same.  gravity has no effect on mass.

Answer:

Explanation:

Answer:

False

Explanation:

Rolling friction takes place when an object rolls on the surface. Sliding friction takes place when two surfaces are rubbed against each other. Rolling friction is much less than sliding friction for same pair of bodies. When one body rolls upon another, there is theoretically no sliding or slip between them.

Saturn is undergoing an apparent retrograde movement period as the Earth moves closer to Saturn in its orbit and then both planets are located on the side of the Sun. Stars that are nearer to us will exhibit higher parallax, similar to how it occurs on Earth.

The star parallax of the Earth is quite modest, barely 0.03 seconds of arc. It would be difficult to see against the backdrop of stars, even with a good telescope.

The angle between the Earth's place at a single time of year and the Earth 6 months later, as determined from a nearby star, is known as the parallax angle. This angle is used by astronomers to calculate how far away that star is from Earth.

We may calculate the distance to a nearby planet using the method described before, s. Now, measuring from an observation point O, we determine the angle the planet occupies, which is. Therefore, P1P2=d, where d is the planet's diameter. As a result, we may use the parallax method to calculate the radius of a neighboring planet.

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Answer:

An electrical potential is a difference in electric potential energy.

Explanation:

Electric potential is a location-dependent quantity that expresses the amount of potential energy per unit of charge at a specified location. ... If the electric potential difference between two locations is 3 volts, then one coulomb of charge will gain 3 joules of potential energy when moved between those two locations.

The electric potential, or voltage, is the difference in potential energy per unit charge between two locations in an electric field.

Such a switching network can be made using combinational logic circuits such as AND, OR, and NOT gates.

To design a switching network that has five input variables and one output variable with the given requirements, we can use combinational logic circuits. The five input variables represent four BCD digits and a control line, and the output variable is a logic 1 or 0 based on the given conditions.

We can use a combination of logic gates such as AND, OR, and NOT gates to implement the switching network. The following steps can be followed to design the circuit:

By using these combinational logic circuits, we can design a switching network that satisfies the given requirements with five input variables and one output variable. The circuit can be implemented using discrete logic gates or programmable logic devices such as field-programmable gate arrays (FPGAs) or application-specific integrated circuits (ASICs).

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In the described system, the force F is applied to a mass system that is initially motionless. The surfaces, pulley, and wheels in the system are assumed to be frictionless, meaning there is no resistance to motion caused by friction.

Additionally, it is specified that mass m2 can only move vertically, implying that its motion is constrained to a vertical direction.

This scenario suggests that the force F is not contributing to the motion of the system. With no friction present, the forces acting on the masses can be attributed to the effects of gravity and any internal forces within the system.

The absence of a horizontal component in the motion of m2 indicates that any horizontal forces, including the applied force F, are not affecting its vertical movement.

The conditions provided in the question help establish the specific dynamics and constraints of the system, which are crucial in determining the forces and motions involved.

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If an electric current of 50 amperes constantly flows through a copper wire 0.5 meters long, the wire is in a homogeneous magnetic field. The intensity of the ampere force acting on the conductor​ is: 25N.

The intensity of the ampere force (also known as the Lorentz force) acting on a conductor in a magnetic field can be calculated using the following formula:

F = BIL

where:

F=  ampere force

B = magnetic induction

I = current

L= length of the conductor

Plugging in the given values:

F = 1 T * 50 A * 0.5 m

F = 25 N

Therefore the intensity of the ampere force acting on the conductor is 25 N.

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The normal force acting on the mountain goat is 650 N. It supports the weight of the goat and keeps it in equilibrium on the slope.

The normal force is the force exerted by a surface to support the weight of an object resting on it. It acts perpendicular to the surface. In this case, the mountain goat is standing on a slope.

When an object is on an inclined surface, the normal force can be split into two components: one perpendicular to the slope (normal to the surface) and one parallel to the slope (tangential to the surface).

The component parallel to the slope is responsible for counteracting the gravitational force pulling the object down the slope.

In this scenario, the mountain goat is standing on the slope, and we can assume it is in equilibrium, meaning it is not sliding down the slope. Therefore, the parallel component of the normal force is equal in magnitude and opposite in direction to the gravitational force acting down the slope.

The weight of the mountain goat is given as 650 N. This is the magnitude of the gravitational force acting on the goat.

The normal force acting on the goat is equal in magnitude but opposite in direction to the gravitational force. So the normal force is also 650 N.

The normal force acting on the mountain goat is 650 N. It supports the weight of the goat and keeps it in equilibrium on the slope.

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Hi there!

Assuming the rod is pulled back 90° (π/2 radians), we can use angular kinematics to solve.

Using the equation:

\(\omega_f^2= \omega_i^2 + 2\alpha \theta\)

\(\omega_f\) = final angular velocity (? rad/sec)

\(\omega_i\) = initial angular velocity (0 rad/sec)

\(\alpha\) = angular acceleration (rad/sec², must solve for)

\(\theta\) = angular displacement (π/2 rad)

Recall Newton Second Law's rotational equivalent:
\(\Sigma \tau = I\alpha\)

τ = Torque (Nm)

I = Moment of inertia (kgm²)
α = angular acceleration (rad/sec²)

Setting the pivot point at the end, and knowing that the force of gravity works at an object's center of mass (1.5m from the rod's end), we can solve for the angular acceleration.

\(\tau= F \times r\\\\\tau = W \times r = 10(9.8) * 1.5 = 147 Nm\)

Now, solve for the moment of inertia given I = 1/3ML² at one of its ends:
\(I = \frac{1}{3}(10)(3^2) = 30 kgm^2\)

Solve for the angular acceleration:
\(147 = 30\alpha\\\\\alpha = 4.9 \frac{rad}{sec^2}\)

Now, we can use the kinematic equation to solve.

\(\omega_f^2 = 0 + 2(4.9)(\frac{\pi}{2}})\\\\\omega_f = \sqrt{2(4.9)(\frac{\pi}{2})} = \boxed{3.923 \frac{rad}{sec}}\)

Answer:

1) Used in optical instruments such as telescopes.

2) Used to form mirages

Explanation:

1) Perhaps the simplest example of this is the astronomical refractor telescope with a right-angle eyepiece holder. Astro scopes mostly point at things high in the sky, but it is inconvenient to place your eye low to look up through the scope, so the light path is bent 90 degrees just before the eyepiece. This can be done with a mirror, but using a simple 45 degree prism (internal angles 45, 45, and 90 degrees) will do the 90 degree bend more efficiently.

2) So when a light pass from cold air to hot air light tends to bend from its path which is known as refraction. As the light get refracted it reaches to a point where the light tends to form 90 degree angle.

Answer:

disturbance,energy

Explanation:

Waves are a disturbance that transfer energy from one place to another.

;)

When the ladybug is rotating, the velocity and acceleration vectors are constantly changing. This is because the direction and magnitude of these vectors are changing as the ladybug moves in a circular motion.

Specifically, the velocity vector is always tangent to the circle at the point where the ladybug is located. This means that the direction of the velocity vector is constantly changing as the ladybug rotates. Similarly, the acceleration vector is always directed towards the center of the circle, meaning that its direction is also constantly changing.

In terms of magnitude, the velocity vector will remain constant if the ladybug is moving at a constant speed. However, the magnitude of the acceleration vector will change depending on the speed of the ladybug and the radius of the circle.

Overall, the velocity and acceleration vectors are constantly changing in both direction and magnitude as the ladybug rotates.

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The first two statements are true. The last two statements are false.

1. At the critical maximum nucleate boiling heat flux, a sudden temperature jump can occur in a heating element. This phenomenon happens when the heat flux is at its maximum and the liquid near the heating surface transitions to a highly active boiling state. The sudden temperature jump is caused by the intense vapor generation and rapid heat transfer processes occurring at the surface.

2. Film boiling is a stage of boiling where a vapor film forms between the heater surface and the liquid. This vapor film acts as an insulating layer, leading to low heat transfer rates in the film boiling region. The vapor film reduces the contact between the heater surface and the liquid, hindering efficient heat transfer and resulting in lower overall heat transfer rates compared to other boiling regimes.

3. Condensation is the process in which a vapor or gas transforms into a liquid state. When condensation occurs, latent heat is released. However, contrary to the statement, the release of latent heat actually acts to heat the surroundings, not cool the air. This is because latent heat represents the energy released during the phase transition from gas to liquid, and it is transferred to the surrounding environment.

4. In pool boiling problems, the excess temperature is not equal to Ts - Too as stated. Instead, it is calculated as Ts - Tsub. Ts represents the surface temperature, and Tsub represents the saturation temperature of the liquid. The excess temperature is the temperature difference between the surface and the saturation temperature, which is used to characterize the heat transfer performance in pool boiling experiments or analyses.

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Answer:

it is very hard but i am trying to help you.

Explanation:

It requires 6676 kJ of energy to remove all the third-shell electrons in a mole of gaseous silicon atoms.

An ionization energy is the energy required to remove an electron from an atom or ion. The ionization energies of elements increase from left to right and decrease from top to bottom on the periodic table, as the atomic radius decreases and the ionization energy increases.

Silicon is a chemical element with the symbol Si and the atomic number 14.

Therefore, we need to multiply the ionization energy by the number of silicon atoms in one mole. This gives us the total energy required to remove all the third-shell electrons in a mole of gaseous silicon atoms.

Summary:It requires 6676 kJ of energy to remove all the third-shell electrons in a mole of gaseous silicon atoms.

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Answer:

Advantages

1) No power supply needed

2)Cling to vertical surfaces

3)No electrical contact problems

4)Inexpensive

Disadvantage

1)Direct field only

2)Deteriorate with wear

3)Have to be pulled from test surface

4)No control over field strength

To raise the temperature of 100g of water from 20C to 40C, 8.4k joules are required.

A joule is the amount of energy expended when a one-newton force is exerted across a one-meter distance. One joule is equal to one watt of electricity emitted or lost over the course of one second.

One joule is therefore not a lot of energy. The kilojoule (kJ), which has a value of 1,000 J per kilojoule, serves as the standard unit of energy since it is typical to measure energies in thousands of joules. The use of calories in nutrition is one such instance. A calorie is a common unit of measurement for dietary energy content.

A joule of energy transmitted to an object is equal to one newton of force. Additionally, it gauges energy.

It, therefore, has 8.4k joules.

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Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question

mass = 2.5 kg

acceleration = 3.0 m/s²

We have

force = 2.5 × 3.0 = 7.5

We have the final answer as

Hope this helps you

Answer:

7500 Newtons

Explanation:

Mass of the sportscar= 1500 kg

Acceleration of the sportscar= 5m/s^2

Hence, let the Force acting on it be F

\(We\ know\ that,\\Force=Mass*Acceleration\\F=ma\\\\Here,\\F=1500*5\\=7500 kg m/s^2\ or\ 7500\ Newtons\)