A plane is landing. It started at 400m/s and ended up at 50m/s after 30 seconds. What is it's acceleration?

{middle school}

Answer:

It simply means that the longest side of the object is 4 m that is 400cm..

Explanation:

___________

The work input required to lower a 120-pound weight from the top of a 3-foot table to the floor is 360 foot-pounds. The correct answer is option B.

The work done to lower an object is calculated by multiplying the force exerted on the object by the distance over which the force is applied. In this case, the force exerted is the weight of the object, which is 120 pounds.

The distance over which the force is applied is the vertical distance from the table's top to the floor, which is 3 feet.

To calculate the work input, we use the formula W = F × d, where W is the work, F is the force, and d is the distance.

Substituting the given values, we have W = 120 pounds × 3 feet = 360 foot-pounds.

Therefore, the work input required to lower the 120-pound weight from the top of the 3-foot table to the floor is 360 foot-pounds.

Learn more about force here:

https://brainly.com/question/30507236

#SPJ11

Answer:

That answer is 5105.8 J

Explanation:

5105.8 J

The differences between Carnot Cycle, Otto Cycle, Diesel Cycle, and Brayton Cycle are:

Carnot Cycle:

Carnot cycle is a reversible cycle that includes two isothermal and two adiabatic processes. It is an idealized thermodynamic cycle that is used to design high-efficiency engines. The Carnot cycle is the most efficient thermodynamic cycle. It serves as a guideline for establishing the upper limit of the thermal efficiency of practical engines. The purpose of the Carnot cycle is to provide an upper limit to the thermal efficiency of engines. The cycle is not used for any practical applications.

Otto Cycle:

Otto cycle is a thermodynamic cycle for spark-ignition reciprocating engines. It consists of four processes: isentropic compression, constant volume heat addition, isentropic expansion, and constant volume heat rejection. The purpose of the Otto cycle is to extract the maximum amount of work from a given fuel-air mixture. Otto cycle engines are used in cars, motorcycles, and small boats. The thermal efficiency of the Otto cycle is determined by the compression ratio of the engine. The higher the compression ratio, the higher the thermal efficiency of the engine.

Diesel Cycle:

Diesel cycle is a thermodynamic cycle for diesel engines. It consists of four processes: isentropic compression, constant pressure heat addition, isentropic expansion, and constant volume heat rejection. The purpose of the Diesel cycle is to extract the maximum amount of work from a given fuel-air mixture. Diesel engines are used in trucks, buses, and large boats. The thermal efficiency of the Diesel cycle is higher than the Otto cycle due to the higher compression ratio of diesel engines. The thermal efficiency of the Diesel cycle is determined by the compression ratio and the cut-off ratio of the engine.

Brayton Cycle:

Brayton cycle is a thermodynamic cycle for gas turbine engines. It consists of four processes: isentropic compression, constant pressure heat addition, isentropic expansion, and constant pressure heat rejection. The purpose of the Brayton cycle is to extract the maximum amount of work from a given fuel-air mixture. Gas turbine engines are used in aircraft, power plants, and ships. The thermal efficiency of the Brayton cycle is determined by the pressure ratio of the engine. The higher the pressure ratio, the higher the thermal efficiency of the engine. The Brayton cycle is also known as the Joule cycle.

learn more about Carnot Cycle here

https://brainly.com/question/28562659

#SPJ11

Answer:

C. the area of the rectangle plus the area of the triangle under the line

Explanation:

Based on the information provided, the velocity vs. time graph is a line with a positive slope and a y-intercept of (0, 3).  The displacement is the area under this line.  This area can be divided into a triangle and a rectangle.  So of the options available, C is the correct one.

Answer:

C

Explanation:

There is no explanation for the answer.

Answer:

Alkaline earth metals.

Explanation:

For e.g The metals of group ll are: Be, Mg, Ca, etc

Answer:

is it from positive to negative am I right tell me if I am wrong

Answer:

positive to negative

The flow of electric current is similar to the flow of water which is from higher level to lower level.

The electric current flow from higher potential region(positive* low concentration of electron) to lower potential region(negative*high concentration of electron)

The merry-go-round is accelerating since it is moving in a circle despite the fact that it is moving at a constant speed. The fact that an object moves in a circle does not always imply that it is moving at a constant speed. When an object moves in a circle, it changes direction, and this alteration of direction implies that the object is accelerating.

Even if the speed remains constant, it is still accelerating because the velocity is changing. This is referred to as centripetal acceleration. Centripetal acceleration is the acceleration caused by a force that pulls an object towards the center of the circle. Centripetal force is required for a body to move in a circle. A merry-go-round moves in a circle at a constant speed. This implies that the speed of the merry-go-round does not vary. However, the direction of motion changes continuously, indicating that the merry-go-round is constantly accelerating. Therefore, the merry-go-round is accelerating despite the fact that it is moving at a constant speed.

to know more about Centripetal acceleration visit:

https://brainly.com/question/8825608

#SPJ11

The magnitude of London dispersion forces depends on the polarizability of the interacting particles, which determines their ability to induce temporary dipoles.

The interaction energy of these forces is inversely proportional to the sixth power of the distance between the particles.

London dispersion forces, also known as van-der Waals forces, are weak intermolecular forces that occur between all atoms and molecules. These forces arise from temporary fluctuations in electron distribution, creating instantaneous dipoles. The magnitude of London forces depends on the polarizability of the particles involved. Polarizability refers to the ease with which the electron cloud of an atom or molecule can be distorted.

Larger, more easily distorted electron clouds have higher polarizability and can induce greater temporary dipoles in neighboring particles.

The interaction energy of London dispersion forces follows an inverse sixth power relationship with distance. As the particles move closer together, the electron clouds become more distorted, resulting in stronger instantaneous dipoles. The energy of interaction decreases rapidly with distance due to the inverse sixth power relationship, which means that even slight changes in distance can have a significant impact on the strength of these forces.

Consequently, particles that are very close together experience much stronger London forces compared to those that are farther apart.

In summary, the magnitude of London dispersion forces depends on the polarizability of the interacting particles, while the interaction energy is inversely proportional to the sixth power of the distance between them.

To know more about van-der Waals forces visit:

brainly.com/question/30820013

#SPJ11

The correct statements are:

This refers to the charged particles that are moving through an electrical conductor.

Hence, we can see that based on the fact that the compass needle is connected to a terminal battery, this means that with no current, the compass needle will not move and options B and E are also correct.

Read more about current here:

https://brainly.com/question/25922783

#SPJ4

Answer:

a

b

e

Explanation:

i got it right on edge

The resistance of the silver wire at 33.0°c is 10.532 ω.

The resistance of a certain silver wire at 33.0°c can be calculated using the formula R = R₀(1 + αΔT), where R is the resistance at the desired temperature, R₀ is the resistance at the initial temperature, α is the temperature coefficient of resistance, and ΔT is the change in temperature.

For silver, the temperature coefficient of resistance is 0.0038 (°C⁻¹).

Therefore, the resistance of the silver wire at 33.0°c can be calculated as follows:

R = 10.00 ω (1 + 0.0038 (33.0°c - 19.0°c))

R = 10.00 ω (1 + 0.0038 (14.0°c))

R = 10.00 ω (1 + 0.0532)

R = 10.00 ω (1.0532)

R = 10.532 ω

Learn more about silver wire resistance:

https://brainly.com/question/29131922

#SPJ11

Ari's final vertical jump height is 5.2 m.

Ari's final vertical jump height is calculated from the law of conservation of energy as shown below.

P.E ( of Ari ) = P.E ( of Bari )

m1gh1 = m2gh2

where;

h1 = ( m2h2 ) / ( m1 )

h1 = ( 70 x 4 ) / ( 50 )

h1 = 5.6 m

Learn more about potential energy here: https://brainly.com/question/1242059

#SPJ1

The force applied by the bullet on the wood is 20 N.

The force applied by the bullet is calculated by applying the following kinematic equation and Newton's second law of motion as shown below.

F = ma

where;

The acceleration of the bullet is calculated as follows;

v² = u² - 2as

where;

when the bullet stops, the final velocity, v = 0

0 = u² - 2as

2as = u²

a = u² / 2s

a = ( 10² ) / ( 2 x 0.05 )

a = 1,000 m/s²

The force applied by the bullet on the wood is calculated as follows;

F = ma

F = ( 0.02 kg ) x ( 1000 m/s² )

F = 20 N

Learn more about applied force here: https://brainly.com/question/14428983

#SPJ1

The complete question is below:

A  bullet of 20 g is shot at 10m/s and is stopped by a piece of wood. The bullet goes 5cm into the piece of wood. Find the force applied by the piece of wood on the bullet

Answer:

26.6 m/s

Explanation:

\(v = r \alpha \\ v = r( \frac{2\pi}{t} ) \\ v = (55)( \frac{2\pi}{13} ) \\ v = 26.6 \: m {s}^{ - 1} \)

Answer:

1. Speed

Explanation:

"how far an object moves in a certain amount of time"

"how far an object moves"- distance

"In a " - over

"certain amount of time" - time

Distance over time is speed.

The speed of an object is the distance the object travels in one unit of time.

Hope I Helped, Feel free to ask any questions to clarify :)

Have great day!

           -Aadi x

Answer:

Explanation:

0 m/s^2 is the answer

Answer:

Zero

Explanation:

Constant speed involves zero acceleration  ( which is a change in speed)

electrostatic  attempting to calculate the charges of two friction-charged items. Include an explanation of WHY electrons flow from one material to another.

Wool, human hairs, dry skin, silk, rayon, tissue paper, plastic wrap, and polyester are examples of materials that tendency to gain or lose electrons; when you tested these materials, you should have discovered that they shifted the silver ball similarly to how the Expanded polystyrene plate did.

On insulating or unground surfaces, an excess or deficit of electrons results in static electricity, often known as an electrostatic charge. Triboelectric charges—charges created by friction between the two surfaces, for example the movement of two surfaces—are what cause it to occur.

To know more about electrostatic visit :

https://brainly.com/question/14889552

#SPJ4

Answer:

241,274.32 inches

Explanation:

How far will he travel if the rear wheel makes 1200 revolutions on the road?

Since the rear wheel makes one revolution in the distance of a circumference of a circle, C with diameter, d = 16 inches

C = πd²/4

So, the distance, travelled in 1200 revolutions is D = 1200 × C = 1200πd²/4

Substituting d = 16 into D, we have

D = 1200πd²/4

D = 1200π(16)²/4

D = 76800π

D = 241,274.32 inches

Answer:

1/5 km/min

Explanation:

the formula for velocity is distance/time

so if i plug in the distance and time i get 5/25 or 1/5

Hope this helps!

Total kinetic energy of a ostrich/child/bike is given by ptotal (= postrich + pchild/bike => 27.8 kg/m/s - 4.5 kg/m/s = 23.3 kg/m/s (in J). A body with mass m kg travelling at a speed of v m/s has momentum M = m*v kg*m/s.

Momentum can be thought of as a brain's "power" or the force that it can apply to another body while it is moving. For instance, a bowling ball with a heavy mass that is moving very slowly (low velocity) may have the same momentum as a baseball with a little mass that is thrown swiftly (high velocity).

More force is being applied to the truck than to the automobile. In motion, inertia is referred to as momentum. Momentum is calculated as the sum of an entity's mass and velocity. A tow van has far more momentum compared to a car driving at the exact same speed due to its increased weight.

To know more about speed visit:

https://brainly.com/question/28224010

#SPJ1

Answer: they are compression waves

Explanation:

The unique property of light waves is that they do not require a medium for propagation.

Generally; waves are classified into electromagnetic waves and mechanical waves. Mechanical waves require a medium of propagation while electromagnetic waves do not require a medium for propagation.

Also, waves are classified into transverse waves and longitudinal waves. In transverse waves, the disturbance is perpendicular to the wave front while in longitudinal or compressional waves, the disturbance is parallel to the wave front.

Light is both an electromagnetic wave and a transverse wave. This means that it requires no material medium for propagation. This is the unique property of light waves.

Learn more: https://brainly.com/question/2673886

The dishwasher would need to transfer 480 kJ of energy for 400 seconds, or 6 minutes and 40 seconds.

Power is determined by the product of force, velocity, and distance traveled (in the force's direction). For those looking to enter the teaching profession in the state of Uttar Pradesh, this is a fantastic opportunity. Voltage and current together produce electrical power P=VXI.

time = energy / power

480 kJ = 480,000 J

time = energy / power

time = 480,000 J / 1200 W

time = 400 seconds

Hence, for the dishwasher to transfer 480 kJ of energy, it would take 400 seconds, or 6 minutes, 40 seconds.

To know more about energy visit:-

https://brainly.com/question/1932868

#SPJ1

The rating of a branch circuit is determined by its ampacity.

Ampacity is the maximum amount of electric current that a conductor or device can carry without overheating and damaging the insulation or conductors. The rating of a branch circuit is the maximum current that the circuit can safely carry without exceeding its capacity or causing damage.

This rating is typically determined by the size of the wire and the protective devices, such as fuses or circuit breakers, that are installed to prevent overloads and short circuits. Branch circuits are commonly used to power individual rooms or devices, such as outlets, lighting fixtures, and appliances. The ampacity of the branch circuit must be carefully calculated to ensure that it can handle the expected load and prevent the risk of electrical hazards.

Know more about Ampacity here,

https://brainly.com/question/31556532

#SPJ11

The rating of a branch circuit is determined by its design capacity to safely carry current expressed in terms of amperes. This prevents overheating or fire hazards. The total current flowing into a junction is equal to the total current flowing out, according to Kirchhoff's junction rule.

The rating of a branch circuit is chiefly determined by the amount of current it's designed to safely carry without overheating or causing a fire. This value is typically found in terms of amperes (or amps), which represent the unit of electrical current. An electrical appliance's requirement for operating is usually expressed in amps. Circuit breakers and fuses are also rated in amps and are designed to interrupt the circuit if the current exceeds their rated value for a specific period.

For measuring the current flowing through a branch, we use an instrument called an ammeter. It needs to be placed in series with the branch circuit, and it has a small resistance to limit its effect on the circuit.

In applications of Kirchhoff's first rule (the junction rule), each branch's current is labelled, and the direction it's going must be determined. However, the total current or the sum of the electric current flowing into and out of the junction (or point in the circuit where conductors meet) must be equal, according to the junction rule.

https://brainly.com/question/33449387

#SPJ11

Answer:

they are both curved surfaces

Explanation:

Answer:

The Earth's gravity keeps the Moon orbiting us. ... This means gravity makes the Moon accelerate all the time, even though its speed remains constant.

There are several pieces of evidence that a convergent boundary once existed. Here are some examples:

Mountain belts: When two tectonic plates converge, they push against each other, which can cause the formation of mountain ranges. The presence of mountain belts, such as the Appalachian Mountains in North America or the Alps in Europe, is evidence that two plates once converged in that area.

Volcanic arcs: When two plates converge and one of them is an oceanic plate, subduction can occur. This can cause magma to rise to the surface and form a volcanic arc, such as the Ring of Fire in the Pacific Ocean. The presence of a volcanic arc is evidence that two plates once converged in that area.

Fossils: When two continents converge, the animals and plants living on those continents can become mixed together. This can lead to the formation of unique fossils that are found only in that area. The presence of these unique fossils is evidence that two continents once converged in that area.

Rocks: When two plates converge, the rocks in the area can become deformed and folded. The presence of folded rocks, such as those found in the Appalachian Mountains, is evidence that two plates once converged in that area.

Learn more about convergent boundary

https://brainly.com/question/30048451

#SPJ4

Answer:

handle, trigger, spindle

Answer:

The ratio of effusion rates of hydrogen gas to argon gas is approximately 4.47:1.

Explanation:

The ratio of effusion rates of two gases can be determined using Graham's law of effusion. According to Graham's law, the ratio of the effusion rates of two gases is equal to the square root of the inverse ratio of their molar masses.

In this case, we need to find the ratio of the effusion rates of hydrogen gas (H2) and argon gas (Ar).

The molar mass of hydrogen gas (H2) is approximately 2 g/mol, and the molar mass of argon gas (Ar) is approximately 40 g/mol.

Using Graham's law, the ratio of effusion rates (R) can be calculated as:

R = √(M2/M1)

R = √(40/2) = √(20) = 4.47

To know more about Graham's law of effusion here: https://brainly.com/question/21690803

#SPJ11