Use the formula given below to calculate the force advantage of the crow-bar (lever) in the picture.

FA = Leffort / Llifting

Select one:
a. 60
b. 32
c. 15
d. 2​

Answer:

You can use a block and an inclined plane (just a tilted board)

Place the block on the plane and gradually increase the angle the plane makes with the horizontal.

Static friction will keep the block in place (no sliding) until the angle between the plane and the horizontal is large enough. The block will now slide but is still under the influence of kinetic friction. Thus static friction is greater than sliding friction.

Answer:

A

B

C

are the correct options

Hence the complete statement will be, " Sensation " occurs in the body while perception occurs in the brain.

Option D

Generally, senses acquire facts from the surroundings using the sensory receptors which eventually feed into neural inputs.

These neural impulses are then dispatched to the brain there it is prepared and interpreted for in addition evaluation which is recognized as perception.

Therefore,we have the follow statements to be true

Sensation occurs in the body

Perception occurs in the brain

Option D

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Answer:

I think it is the first one: The arrow appears reversed because light is bent as it enters the water, and again as it exits. The two light paths cross, making the direction of the arrow appear crossed.

Explanation:

Answer

P V = C R T      natural gas law

P1 V1 = C R T1

P2 / P1 = T2 / T1 = 4       other numbers remain constant and cancel

P2 = 4 P1

The new pressure is 4 times as great.

The new pressure is 4 times greater.

[tex]PV=CRT[/tex] (Natural gas law)

[tex]P1V1=CRT1[/tex]

[tex]\frac{P2}{P1} =\frac{T2}{T1} =4[/tex] (Other members remain constant and cancel)

[tex]P2=4P1[/tex]

Therefore, the new pressure is 4 times greater.

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Answer:

matter

Explanation:

Answer:

moving up positive acceleration

Explanation:

when moving up as you bounce the ball

the speed changes gradually increasing so according to the equation

acceleration =[speed change ] ÷ period when speed change is positive acceleration is also positive , and an greater value

example speed changes 5m/s within 2 seconds throwing the ball upward

(these are assuming values to explain)

acceleration is 5/2 = + 2.5 m/s^2

so this is an positive acceleration

if negative we call deceleration

When a basketball is bouncing and moving up, it has a negative acceleration.

Acceleration is the rate of change of velocity with respect to time. If the velocity of the basketball is increasing in the upward direction as it bounces, the acceleration is directed downward (negative). This might seem counterintuitive at first, but it is essential to understand that acceleration is a vector quantity, which means it has both magnitude and direction.

When the basketball moves upward during its bounce, its velocity is slowing down due to the opposing force of gravity. As it moves against gravity, the magnitude of its velocity decreases until it reaches the highest point (apex) of its bounce, where its velocity momentarily becomes zero. At the apex, the basketball changes direction and starts moving downward, and its velocity increases in the downward direction.

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Answer:

the faster an object moves the more kinetic it has. the more mass an object has, the more kinetic energy it has.

The total work work done on a block by the force of friction is the force of friction times the distance traveled times the cosine of the angle between the friction force and displacement

Work done is measured in joules (J). It is distance moved along the line of action of the force is measured in metres (m)

Work is said to be done when a force acts upon an object to cause a displacement.

Calculating the work done on an object

work done = force × distance

Where;

Work done is measured in joules (J)

Force is measured in newtons (N)

Distance is measured in meters (m)

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Answer:

108

Explanation:

because F=ma

which is 90 × 1.2

= 107N

Answer:

Isaac Newton

Explanation:

Because i learned this in school

Answer:

d(P1,P2) = (x2 x1)2 + (y2 y1)2 + (z2 z1)2. This can be proved by repeated application of the Pythagorean Theorem. Example The distance between P1 = (2,3,1) and P2 = (8,5,0) is d(P1,P2) = (8 2)2 + (5 3)2 + (0 1)2 = 36 + 64 + 1 = 101 10.05.

Explanation:

By using what we know about microscopic interactions, we will see that the correct option is:

"The electric field is stronger and is the opposite direction of the gravitational field"

The gravitational field depends on the mass of the proton, while the electric field depends on the charge of the proton. We know that gravity is negligible at such small scales, where the electric and nuclear interactions rule. So for such small particles, electric fields will always be stronger than gravitational fields.

We know that the gravitational force is an attractive force, so the field will point inwards.

In the other hand, the electric force depends on the type of the charge. Two equal chares repel and two opposite charges attract.

In the case of the proton, we have a positive charge, so it will only atract negative charged particles. So the vectors of the field point outwards.

Then we can conclude that the field's directions are opposite.

Then the correct option is:

"The electric field is stronger and is the opposite direction of the gravitational field"

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Answer:

latent heat, also called the heat of vaporization

Answer:

The ball hit with 12N

Explanation:

Just took the quiz and got it right

We have that the miss  distance  is mathematically given as

h= 0.76 m

Distance of miss

Question Parameters:

Generally the equation for the Time is mathematically given as

   t = d / v

Therefore

[tex]t = \frac{73.0 m}{ 185 m/s}[/tex]            

 t = 0.39s              

Hence      

x = 1/2 g t^2    

x = 1/2 *9.8 * 0.39 s ^2        

x= 0.76 m  

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12 x is the magnification power if we view an object with binoculars, and the image appears right side up and a dozen times larger.

Magnification power refers to the larger image of a given lens can make of an object which is seen through the lens. If a microscope has magnification power up to 1000x, then this means that the image of the object is 1000 times larger than the original one so we can conclude that the magnification power of binocular is 12x.

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During boiling, the temperature of a container of water remains constant because thermal energy of the water is constant during the transformation from liquid to gas.

Kinetic energy is energy possessed by a particle by virtue of its motion. Molecules that compose matter are in constant random motion according to the kinetic theory of molecules.

The temperature of a container of water stops increasing right before it starts to boil and turn into gas because the thermal energy of the water remains constant as it transforms from liquid to gas. The heat that is required to turn the liquid into gas at the boiling point is called the latent heat.

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Answer:

that makes it a scalar quantity

The electric charge only has an amount that makes it a scalar quantity.

A scalar quantity is a type of quantity that can be described by magnitude only. Scalar quantity has no direction and can be represented by magnitude only.

Electric charge with only amount can be said to be a scalar quantity, because it can be completely described by its magnitude only.

Thus, the electric charge only has an amount that makes it a scalar quantity.

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Answer:easier for a sharp pin to penetrate a piece of cardboard than a blunt one

Explanation:when the same force is used. A solid resting on a horizontal surface exerts a normal contact force equals to its weight.

Answer:

Find two boxes just a bit smaller than the other. The long sides of the box should be less than twice as long as the short side of the boxes. The smaller box should fit inside the larger box with about 1 inch in each direction to spare. The boxes can be cut down so that they fit together properly. Leave the flaps on the boxes. Buy a small sheet of Plexiglas (tm) a little bit smaller than the width and length of the top of the box. You will also need four pieces of cardboard to use for reflectors.

Explanation:

Answer:

B

Explanation:

The Magician pulled a rabbit out of his hat

Answer:

In the near infrared (NIR) and the short-wave infrared (SWIR) spectrums, we measure the reflectivity of objects. Thus, using a specific lighting working in an active infrared spectrum, we can capture the rays reflected by the object and produce its reflectrogram.

Explanation:

hope it will help you have a great day bye and Mark brainlist if the answer is correct

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Answer:

If you put the metal extract into the water there will be no reaction but if you put it into the acid it will liberate H2 (hydrogen gas) Hence it is the difference

Explanation:

this should sum it down

Based on the nature of variables, none of the evidence card should be eliminated because they all represent variables.

Variables refers to any quantity that can have various values.

Variables include age, time , distance, height, speed, etc.

Variables can either be independent, dependent or constant.

There, none of the evidence card should be eliminated because they all represent variables.

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vf²=vi²+at

t = 8 min = 480 s

decelerates = a = - (negative sign)

input the value:

160²=vi²-0.5 x 480

25600 = vi²-240

25840 = vi²

vi = 160.75 m/s

The initial velocity of the aircraft is equal to 400 m/s when it decelerates at 0.5 m/s².

The equations of motion have described the behavior of a physical system in which motion is a function of time. The equations of motion describe a set of mathematical functions in terms of dynamic variables and the relationship between the velocity, time, displacement, and acceleration of a moving object.

The mathematical expressions for three equations of motion can be written as:

[tex]v = u + at\\S = ut +\frac{1}{2} at^2\\v^2-u^2 = 2aS[/tex]

Given, the final velocity of the aircraft,  v = 160 m/s

The time taken by the aircraft, t = 8 min = 480 sec

The de-acceleration of the aircraft, a = -0.5 m/s²

From the first equation of motion, we can find the initial velocity of the aircraft:

[tex]v = u +at[/tex]

160 = u - (0.5) × (480)

u = 160 + 240

u  = 400 m/s

Therefore, the initial velocity of the aircraft is equal to 400 m/s.

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Answer is the hind brain

The brainstem is located under the forebrain and midbrain. Therefore option D is correct.

The brainstem is located under both the forebrain and midbrain. It is a vital component of the central nervous system that connects the brain to the spinal cord and controls many essential functions such as breathing, heart rate, and digestion.

It consists of three main regions: the medulla oblongata, pons, and midbrain. The forebrain, midbrain, and hindbrain together constitute the major divisions of the brain.

The hindbrain is positioned below the midbrain and includes structures like the cerebellum, pons, and medulla oblongata.

The brainstem, specifically its lower regions, is responsible for relaying information between the brain and the rest of the body while regulating critical bodily functions.

Therefore option D is correct.

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Answer:

In stress strain curve of ductile materials, up to proportionality limit stress and strain are proportional to each other and also elastic in nature. After that proportionality disappears and only elasticity remains. That limit is called elastic limit.

Explanation:

Answer: A

Explanation: The direction of force is opposite but the magnitude of force is equal.