please help me answer this​

Answer:

Sharpening a knife reduces it's height as a wedge thus giving it more efficiency.

Explanation:

Mechanical advantage refers to the degree or quantity to which a force is increased or amplified by using a tool or a machine.

Mechanical Advantage can be calculated as follows:

Lenght of Incline (LI) / Height of Incline (HI)

Assume I have constructed a hedge with an inclination that run 10 meters from point x to point y (which is the back of a truck. Point y to the floor is 5 meters.

If   LI = 10m and

HI= 5m

The mechanical advantage is given as 10/5 = 2

The angle of incline is also called the effort distance. From our calculations above, by sacrificing horizontal movement, I reduced the amount of effort it would have cost to lift up that object from ground up -  a distance of 5 meters.

Think of a knife as a form of a similar wedge.

The more a knife is sharpening of a knife further reduces its angle of elevation. Thats why it becomes more efficient to use, hence our mechanical advantage.

Cheers

Answer:

Answer:

Q=it

Explanation:

[tex] \purple {\bold {Q = it}} [/tex] is the equation equation that links charge flow, current and time.

Here,

Q = Charge

i = current

t = time

Answer As a wave travels across the open ocean, it gains speed. When a wave reaches a shallow coastline, the wave begins to slow down due to the friction caused by the approaching shallow bottom. ... Think of it like driving a car at high speed and then slamming on the breaks. Everything is going to fly to the front.:Waves at the Shoreline: As a wave approaches the shore it slows down from drag on the bottom when water depth is less than half the wavelength (L/2). The waves get closer together and taller. ... Eventually the bottom of the wave slows drastically and the wave topples over as a breaker. hope this helps have a nice night❤️❤️❤️

Explanation:

Answer:

C

Explanation:

Electromagnetic waves are produced by the vibration of charged particles.

The true statement of an electromagnetic wave is option c. The wave is caused by vibrating particles of matter.

It is the wave that should be developed that leads to the vibration that lies between the electric field and a magnetic field.

Here EM waves should be composed for oscillating magnetic and electric fields.

Hence, the option c is correct.

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The total thrust, expressed in pounds or tons, that the hydraulic-feed mechanism on a drill can impose on a drill string; also, the pressure of the fluid within the hydraulic cylinders, generally expressed in pounds per square inch. Ref: Long.

Hydraulic pressure is the force imparted per unit area of a liquid on the surfaces which it has contact. Liquids are incompressible, and as such, when a load acts

Answer:

Uv rays

Explanation:

ultraviolet rays of the suun gives force

Answer:

what zones

Explanation:

Answer:

35%

Explanation:

Answer:

its 83

Explanation:

Answer:

22 m

Explanation:

Answer:

cliff height = 10.55 m

Explanation:

Remarks

Solution

Time

So the time taken is d = r * t  

Remember, this formula can only be used when there is no acceleration.

d = 22 meters

r = 15 m/s

t = ?

t = d / r

t = 22 / 15

t = 1.467

Height of the Cliff

vi = 0 (vertially)

a = 9.8 m/s^2

t = 1.467 seconds    The time horizontally and vertically is the same.

d = ?

Formula

d = vi*t + 1/2 a t^2

Solution

d = 0 + 1/2 * 9.8 * 1.467^2

d = 10.55 meters.

Answer:

The mechanical advantage increases as the slope of the incline decreases. But the load will then have to be moved a greater distance. The ideal mechanical advantage (IMA) of an inclined plane is the length of the incline divided by the vertical rise, the so-called run-to-rise ratio.

Explanation:

PLEASE MARK ME AS BRAINLIEST

Responder:

E = 1440 kJ

Explicación:

Se da que,

La potencia de un horno de cocción es de 800 W

El voltaje al que se opera es de 230 V

Tiempo, t = 30 minutos = 1800 segundos

Necesitamos encontrar la energía eléctrica utilizada por el horno de cocción. El producto de la potencia y el tiempo es igual a la energía consumida. Entonces,

Answer:

CALCIUM IDENINE ADEININE AND PHOSPHATE

Explanation:

Answer:

The sun generates energy from a process called nuclear fusion. During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons. Hydrogen nuclei fuse to form one helium atom. During the fusion process, radiant energy is released. :D

Answer:

The third shell would be empty, so the eight electrons on the second level would be the outermost after the atom lost one electron

Explanation:

When an atom is bonded with other atoms, a more stable configuration must be reached, which is why the energy of the molecule is less than the energy of the individual atoms, for this to happen in general, electrons are shared or lost and gained in each atom, depending on the electronegative of the same.

If we analyze an atom within the molecule, its last shell is full, in the case of atoms with few electrons in this shell, they are lost and in the case of many electors in this shell, it gains electrons to have eight (8) in total.

When reviewing the different answers, the correct one is:

* The third shell would be empty, so the eight electrons on the second level would be the outermost after the atom lost one electron

Answer: It’s B

Explanation:

Answer:

39

Explanation:

calculator

Answer:

39 is the answer. of your questions

Answer:

I'm pretty sure it's half

Answer:

half

Explanation:

.................................

Answer:

soil

Explanation:

CORRECT

Answer:

soil

Explanation:

Hope this will help

Answer:false

Explanation:

Answer:a

Explanation:because I know

Answer:

B & C

Explanation:

the first block will not move

Answer:

13. (i) The magnitude of the force that is pressing the lawn-mower directly into the ground is 25 N

(ii) The magnitude of the effective force that moves the mower forward is approximately 43.3 N

(iii) Because there are no net downward force acting on the lawn-mower

Explanation:

13. The given force pushing the lawn-mower = 50 N

The angle at which the force acts = 30° to the ground

The component of the pushing force are;

(i) The magnitude of the force that is pressing the lawn-mower directly into the ground = The vertical component of the pushing force

The vertical component of the pushing force, [tex]F_y[/tex] = 50 N × sin(30°) = 25 N

∴ The magnitude of the force that is pressing the lawn-mower directly into the ground = [tex]F_y[/tex]  = 25 N

(ii) The magnitude of the effective force that moves the mower forward = The horizontal component of the pushing force

The horizontal component of the pushing force, Fₓ = 50 N × cos(30°) = 25·√3 N ≈ 43.3 N

∴ The magnitude of the effective force that moves the mower forward = 25·√3 N  ≈ 43.3 N

(iii) The lawn mower moves forward and not downwards because according to Newton's first Law of motion, the lawn-mower moves forward because it is being acted on by a net forward directed horizontal force

However, according to Newton's third law, the reaction of the ground is equal to the weight of the lawn mower, therefore, there are no net vertical force acting on the lawn-mower, such that the lawn-mower remains in the initial horizontal level and does not move downward into the ground.

Answer:

The first one is 9 times the original

The second one is 1/2 times

The third one is 1/3 times

Answer:3 m/s

Explanation:

The resulting acceleration to move the 5Kg box is equal to 3m/s². Therefore, option (D) s correct.

Acceleration can be defined as the rate of change in the velocity of an object with respect to time. The acceleration of an object is a vector parameter with both magnitude and direction. Acceleration is also defined as the first derivative of the velocity w.r.t. time and the second derivative of position w.r.t. time and

According to Newton's 2nd law of motion, the force is equal to the product of the mass (m) and acceleration.

F = ma

And,   a = F/m

Therefore, the acceleration (a) inversely proportional to the mass (m).

Given, the force used to move the box, F = 15 N

The mass of the given Box, m = 5 Kg

The resulting acceleration, a  = 15/5 = 3 m/s²

Therefore, the acceleration of the box is equal to  3 m/s² when it is pushed with a force of 15 N.

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Answer:

Pressure = 3000N/m²

Explanation:

Given the following data;

Force = 15N

Area = 0.5cm² to meters = 0.5/100 = 0.005m²

To find the pressure;

Pressure = Force/area

Substituting into the equation, we have:

Pressure = 15/0.005

Pressure = 3000N/m²

The man's average velocity is 73.3 mph (miles per hour).

Average velocity is a measure of the rate of displacement of an object in a given direction. It is the total displacement of the object divided by the total time taken to cover that displacement. In other words, it is the distance an object travels divided by the time it takes to travel that distance. Average velocity is an important concept in physics, as it can provide insight into the motion of an object and the forces acting upon it. Average velocity can be calculated using the equation: velocity = displacement/time.

This can be calculated by dividing the distance (55 miles) by the time (0.75 hours). Mathematically, this can be expressed as:

velocity = (distance / time)

velocity = (55 miles / 0.75 hours)

velocity = 73.3 mph

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Answer:

drought, floods, rip currents, tropical cyclones, wildfires

Explanation:

right on edge

Answer:11

Explanation:

Just did it

Answer: it’s 11

Explanation:

I just did the question

Answer

That doesn't make any sense.

Explanation:

Answer: The number of complete wavelengths in a given unit of time is called frequency (f). As a wavelength increases in size, its frequency and energy (E) decrease. From these equations you may realize that as the frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength gets longer.

Explanation: