If an object starts from rest, what is its initial velocity?

The maximum constant speed at which the pilot can travel around the vertical curve with a radius of curvature of

p = 800 m so that he experiences a maximum acceleration of

an = 8g = 78.5 m/s2 is 89.4 m/s.

Given data:

Radius of curvature p = 800 m

Maximum acceleration an = 8g = 78.5 m/s²

Mass of the pilot m = 70 kg

Maximum speed v for the plane is given as follows:

an = (v²) / pm

g = (v²) / p78.5 m/s²

= (v²) / (800 m)

where v is the velocity and an is the maximum acceleration Let's solve the above equation for v to determine the maximum constant speed:

v² = 78.5 m/s² × 800

mv² = 62800

v = √62800

v = 250.96 m/s

The pilot can travel at a maximum speed of 250.96 m/s

to experience a maximum acceleration of 8g if we consider the theory of relativistic mass increasing with speed.

So we need to lower the speed to achieve 8g.

For a safe speed, let's take 80% of the maximum speed; 80% of 250.96 m/s = 200.768 m/s

Therefore, the maximum constant speed that the pilot can travel around the vertical curve having a radius of curvature p = 800 m,

so that he experiences a maximum acceleration an = 8g = 78.5 m/s2, is 200.768 m/s.

When the plane is traveling at this speed and is at its lowest point, the normal force he exerts on the seat of the airplane is;

N = m(g + an)

Here, m = 70 kg, g = 9.81 m/s²,

and an = 78.5 m/s²

N = (70 kg)(9.81 m/s² + 78.5 m/s²)

N = 5662.7 N (approx)

Therefore, the normal force the pilot exerts on the seat of the airplane when the plane is traveling at the maximum constant speed and is at its lowest point is 5662.7 N.

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When A computer is on a desk The normal force pushing up on the computer is 17 N and the weight is 17 N down then the Net force is 0 N

Motion of the object is because of  Force exerted on it. Balanced forces are those forces which are opposite in direction and equal in magnitude. When resultant force acting on a body is zero then it is called as balanced force. motion of the body is not because of Balanced force. ex. when two persons pulling rope on both end with equal magnitude which cause them to be balanced force have 0 net force.

When resultant of all the forces is not equal to zero then we call it as Unbalanced forces. unbalanced force are responsible for the motion of the body.

Given,

Normal Force in upward direction = 17N

weight mg in downward direction = 17N

in this case both forces are in opposite direction. one is on positive y direction and other one is in negative y direction. Therefore net force acting on the computer desk is given by,

\(F^{2} _{net} = F^{2} _{1} + F^{2} _{2} + 2F _{1}F _{2}cos\alpha\).....1

where \(\alpha\) = angle between two forces.

\(\alpha\) = 180 \(cos\alpha\) = -1

\(F_{1} = F_{2}\) , 17N =17N

With this equation 1 becomes

\(F^{2} _{net}\) = 2F₁²-2F₁² = 0N

Hence net force is 0 N. This is a balanced force.

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The acceleration of the crate is 1.196 m/s².

This can be defined as the rate of change of velocity.

To calculate the acceleration of the crate, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute the values above into equation 1

Hence, The acceleration of the crate is 1.196 m/s²

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Answer: Choice A, that X and Y are both positive

Explanation: positive charges are attracted to negative charges, so for their electric fields, positive charges point outward while negative charges point inward. In this model, it shows that both X and Y are pointing outward, hence they both have to have positive charges

The formula Work = Force x Distance can be used to calculate the amount of work done. In this case, the applied force is 120 N, and the distance traveled is 15 m.

Work equals Force x Distance = 120 N x 15 m = 1800 J

As a result, the answer is 1,800 J.

It is important to remember that work is a scalar quantity whose value is determined by the direction of the force and displacement. The work done is positive if the force and displacement are both in the same direction. If they are pointing in opposite directions, the work is negative. Because the force and displacement are both in the same direction in this case, the work done is positive.

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The tree will fall in the south eastern side of the area due to two bulldozer.

The tree falls in the sloppy direction due to both bulldozer which apply force from two directions. One bulldozer apply force on the tree from western side whereas the other bulldozer apply force on the tree from north side so that's why we can say that the tree will fall in the south eastern side of the area.

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Answer:

Maybe it; the 4th image

Explanation:

The upper bulldozer have more force than the lower bulldozer. Therefore making the down force longer than the right force

Answer:

A helpful mutation like camoflage would immensely help a species survive and flourish. The reason being the appliances of such a mutation. Camoflage is one of the most apllicable of abilities. It can be used as a defense mechanism, to hide in plain sight, it can be used offensively to avoid being seen while hunting and it can even be used as a form of communication between the species. All of these appliances would greatly benefit the species and would most definitely help it survive and flourish.

Answer:

The front wheels are aligned towards the right.

Explanation:

Wheel alignment is very important. It ensures proper maintenance of the car's wheel. When a car turns around a common point, the wheel on that side to which the car turns, the turning is more than the other.

The wheel alignment consists of adjusting the wheel's angles so as to stay perpendicular to the surface of the road and to ensure proper tract to the tires. It also provides maximum life to the tire. The front wheels are aligned to the right when the car makes a right turn and the wheel leans in towards the center of the car.

Answer:

Batteries are systems that store chemical energy and then release it as electrical energy when they are connected to a circuit. Batteries can be made from many materials, but they all share three main components: a metal anode, a metal cathode and an electrolyte between them. The electrolyte is an ionic solution that allows charge to flow through the system. When a load, such as a light bulb, is connected, an oxidation-reduction reaction occurs that releases electrons from the anode while the cathode gains electrons

Explanation:

No, because even though the resistances can be determined, resistance also depends on the dimensions of the resistor.

 A resistor is an electronic component that inhibits electric current. Resistors are included in passive components because these components do not require an electric current to work. Resistors are made of tubular material or carbon and ceramic materials. The greater the capacity of the resistor, the larger the diameter of the tube used.

in electronic circuits, resistors have several uses, namely as follows.

The resistor formula is as follows:

R = V/I

Description:

R = resistance in units of Ohms

V = voltage in units of Volts

I = current in amperes

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Answer: overjustification

Explanation:

The overjustification effect is a situation that occurs when an incentive like prizes or money or prizes leads to the reduction in an individual's intrinsic motivation that is necessary in performing a task.

In this case, because the children are motivated by money, when the take doesn't involve money anymore, they may not be willing to do it.

Inelastic collision, the momentum before and after the collision and the total energy of the system remains conserved.

Answer: Down below is the answer in complete sentences!

Explanation:

PART A:

Gravity and Acceleration are two additional forces acting upon the sled.

PART B:

Gravity will affect the sled by pulling it down, since the slope of the hill is negative.

Acceleration will affect the sled by gradually increasing it's speed, since the slope is downwards, which in addition to the initial force exerted plus gravity increases the speed, thus the sled accelerates.

when running a line, in a right-triangle, from the 90° angle perpendicular to its opposite side, we will end up with three similar triangles, one Small, one Medium and a containing Large one.  Check the picture below.

\(\cfrac{x}{11}~~ = ~~\cfrac{4}{x}\implies x^2=44\implies x=\sqrt{44}\implies x=2\sqrt{11}\)

Answer:

density=mass/volume

density=19.3

mass=x

volume=100

we are looking for mass so we have to change the subject formula to m=dv

which means mass is equals to density multiplied by volume

m= 19.3 x 100

which is 1930.

Answer:

2kg

Explanation:

∆p=mv m=∆p/v. (3.0kg*m/s)/1.5m/s

Answer:

yes, it will move but slowly

Explanation:

The friction force between the box and the floor don't stop it from moving.... but it slow down its speed

The wavelength of an electromagnetic wave with a period of 8.43 ps can be found using the equation λ = c/f, where λ is the wavelength, c is the speed of light, and f is the frequency.

To find the wavelength, we can use the equation λ = c/f, where λ represents the wavelength, c is the speed of light in a vacuum (which is approximately 3 × \(10^8\) meters per second), and f is the frequency of the wave.

First, we need to convert the period to frequency by taking the reciprocal: f = 1/8.43 ps. Since the period is given in picoseconds (ps), we divide 1 by 8.43 ps to obtain the frequency in inverse picoseconds (ps^(-1)).

Next, we can substitute the values into the equation to find the wavelength: λ = (3 × \(10^8\) m/s) / (1/8.43 ps). By simplifying the equation, we get: λ = (3 × \(10^8\) m/s) * (8.43 ps).

The picoseconds cancel out, leaving the wavelength in meters: λ ≈ 2.5299 meters. Therefore, the wavelength of the electromagnetic wave with an electric field oscillating with a period of 8.43 ps is approximately 2.5299 meters.

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Answer:

Explanation:

In this case, a dark shirt or blanket would be a heat conductor as well as metal would be, too

Static electricity represents charges without movement, while electric current represents charges in motion (electric flow).

The fuse is a component of electrical installations that is interrupted or melts when the current is excessive. Fuses are composed of a sheet or filament made of an alloy or metal that is characterized by a low melting point. This element is located at a strategic point in the electrical installation so that it melts if the intensity of the current exceeds a certain value. Thus, the fuse interrupts the current and safeguards the integrity of the conductors, minimizing the risk of fire or breakdown.

Answer:

Explanation:

5 C = 278 K

25 C = 298 K

V1 / T1 = V2 / T2

1.5L / 278 K = V2 / 298 K

V2 = (1.5L * 298) / 278

V2 = 1.61 L

Through photosynthesis, the plant creates glucose, a type of sugar, from water and carbon dioxide from the air.

Chloroplasts, a type of organelle found in plant cells, convert light energy into chemical energy that is relatively stable through the photosynthetic process. They maintain life on Earth in this way.

Chlorophyll stands out among the many kinds of pigments found in nature because it gives plants the ability to absorb the energy they require to develop tissues.

Chlorophyll is found in the plant's microscopic chloroplasts, which are found in its cells. This is where photosynthesis takes place.

Therefore, water and carbon dioxide from the air into glucose.

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Answer:

4 seconds

Explanation:

Given:

Δy = 0 m

v₀ = 20 m/s

a = -10 m/s²

Find: t

Δy = v₀ t + ½ at²

0 m = (20 m/s) t + ½ (-10 m/s²) t²

0 = 20t − 5t²

0 = 5t (4 − t)

t = 4

Answer: greater than

Explanation:

It is possible to distinguish between these types of radiation by the use of an electrostatic field.

A radioactive source is a source that emits radiation such as alpha, beta and gamma radiation. We can be able to distinguish between these types of radiation by the use of an electrostatic field.

The gamma rays is undeflated by the field, the alpha ray is deflated to the negative part of the field while the beta rays is deflated by the positive part of the field.

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Answer:

yes

Explanation:

velocity is vector though but speed is scalar

velocity requires direction

so velocity is literally speed with direction

All particles have energy, and the energy varies depending on the temperature the sample of matter is in, which determines if the substance is a solid, liquid, or gas. Solid particles have the least amount of energy, and gas particles have the greatest amount of energy

Answer:

2.5 m/s North

Explanation:

Took the quiz on K12 it was right

To determine the strength of the dipole created by the redistributed charge on the conducting spherical shell, we can consider the concept of electric dipole moment.

The electric dipole moment (p) is defined as the product of the magnitude of either charge (q) in the dipole and the separation distance (d) between them:

p = q * d

In this case, the dipole moment arises from the redistribution of charge on the conducting spherical shell. The magnitude of the charge on the shell will depend on the electric field (E) it experiences.

Now, let's analyze the scenario step by step:

1. The electric field (E) is uniform and acts on the conducting spherical shell of radius (r).

2. Due to the presence of the electric field, charges on the shell will redistribute themselves until equilibrium is reached.

3. The redistribution of charges will result in a dipole-like configuration, where positive charge accumulates on one side and negative charge on the other side.

4. To calculate the strength of the dipole moment (p), we need to determine the magnitude of the charge (q) and the separation distance (d) between them.

5. In the case of a conducting shell, the electric field inside the shell is zero, and the charges redistribute themselves to the outer surface of the shell. This means that the separation distance (d) between the positive and negative charges is equal to the diameter of the shell (2r).

6. The magnitude of the charge (q) on each side of the dipole can be determined by considering the net charge on the shell, which is zero. Therefore, the charges on each side of the dipole are equal in magnitude.

Now, we can express the dipole moment (p) as:

p = q * d = q * 2r

To find the value of q, we need to consider the electric field (E) acting on the shell. The electric field due to an idealized dipole at the center of the shell is given by:

E = (kp * cosθ) / r^2

where kp is the electric dipole moment of the idealized dipole and θ is the angle between the direction of the electric field and the axis of the dipole.

Since the electric field (E) acting on the shell is the same as the field due to the idealized dipole, we can equate these two expressions:

E = (kp * cosθ) / r^2 = (kq * 2r * cosθ) / r^2

From this equation, we can deduce that kp = 2krq.

Therefore, the strength of the dipole moment (p) is given by:

p = q * 2r = (kp * r) / (2k)

Substituting kp = 2krq, we get:

p = (2krq * r) / (2k) = rq

Hence, the strength of the dipole moment is given by p = rq, where r is the radius of the conducting spherical shell and q is the magnitude of the charge on each side of the dipole.

Note: The negative sign indicating the direction of the dipole is not considered here since we are only interested in the magnitude of the dipole moment.

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Answer:

20 kg = 20000 grams. What is 20 kilograms in pounds? 20 kg = 44.09245 pounds.Explanation:

:)

Answer:

W = mg

W = 20kg x 9.8m/s^2

W = 196 N