What is the elevation of point B?
What about F?

Answer:

the answer is C

Explanation:

this is because pressure is defined as the force acting per unit area thus,

the lower the area the higher the pressure

this can be explained by This,

will you experience pain if touch the tip of the needle or your pen

the area in the needle is less thus, more pressure

hope this helps,

Answer:

energy can move from one location to another, the particles of matter in the medium return to their fixed position. A wave transports its energy without transporting matter.

A wave which propagates in a medium loses its energy while moving from one location to another location but their is no loss in the matter of a wave.

A wave is a disturbance which propagates through a medium. There is a disturbance, propagation of light, and a medium. A disturbance is a change from the current state of a measurable quantity at some location.

In a wave phenomenon of light, the energy can move from one location to another location, yet the particles of matter in the medium come back to their fixed positions. A wave transports its energy without any transportation of matter.

The wave function for a material particle which moves is called a matter wave. The relationship between the momentum and wavelength for matter waves can be given by the expression: p = h/λ, where, p is the momentum, h is constant and λ is the wavelength of light and the relationship between energy and frequency is E = hf.

Learn more about Waves here:

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Answer:

$4.2

Explanation:

Given data

Power= 700W

time= 10 hours

Cost per kilowatt hours is cents $0.20

Let us find the number of hours in a month

=24*30

=720 hours

Energ= power*time

Energy= 700/1000*30

Energy= 7*3

Enery= 21 kwh

1 kwh= 0.2

21kwh= x

cross multiply

x=21*0.2

x= $4.2

Answer:

I hope the answer below helps :

Explanation:

Let the tension force be T in the rope.

The downward forces acting on the system of the boy and the box are the weight of the boy and the weight of the box.

The upward forces are T and T on each side of the rope.

As the system is in a static equilibrium:

[tex]T+T=(10+45)kg \\\\=>T=55kg[/tex]

or  55g or

Newtons=550N ,  if g=10m/s  

The forces acting on the boy are: Tension T, reaction from the weighing machine, and weight 45 g.  So,

Normal−reaction of the weighing machine :

[tex]45-T\\45-55\\=-10[/tex]

(i)  The weighing machine shows its normal reaction force as the weight of the person standing on it.  So weight displayed =-10kg.

(ii) Suppose the man pulls down the rope with a force F and the tension becomes T.

The forces acting downwards on the rope at the two ends are:  F, weights of man and the box.  The upward forces are Tension T on each side of rope.

The system being in equilibrium:

[tex]2T=F+45kgf+10kgf\\=F+55kgf\\=T=45kgf+\frac{F}{2}[/tex]

=>  Normal reaction force from the weighing machine on the man

N=45+F−T=-10kgf+F/2

If N is to become 45kgf, then  F has to be 55kgf or 550N

Answer:

The reading on the scale is 539 N.

Explanation:

The given parameters include;

The reading on the scale = weight of the boy + weight of the box

                                           = M₂g + M₁g

                                           = g(M₂ + M₁)

where;

The reading on the scale is calculated as follows;

W = 9.8(45 + 10)

W = 9.8(55)

W = 539 N

Thus, the reading on the scale is 539 N.

Answer: Cells have receptors because Receptors let the cell know when to let things in and out of the cell.

Explanation:

Cell receptors also called transmembrane receptors are proteins located on the surface of a cell (extracellularly) or inside the cell which receive signals that alters the functions of the cell. The functions of the cells which can be altered includes the alteration in gene transcription and the cell morphology.

Cell receptors are generally categorizes into the following groups:

--> Internal receptors

--> cell surface receptors

--> ion channel receptors

--> G protein coupled receptors

--> enzyme linked receptors

Interaction of cell membrane receptors with specific ligands that bonds to the receptors causes conformational changes in the receptor protein. This in turn, enzymatically activates the intracellular part of the protein or induces interactions between the receptor and the proteins in the cytoplasm that act as second messengers, thereby relaying the signal from the extracellular part of the receptor to the interior of the cell. This enables the cell to know when to let things in or out of it through the information conveyed.

Answer:

v = 39.6 m/s (first answer option)

Explanation:

Use conservation of mechanical energy.

The starting is completely potential energy and the final is all kinetic energy:

[tex]m*g*h=\frac{1}{2}*m*v^2\\g * h=\frac{1}{2} v^2\\9.8*80=\frac{1}{2} v^2\\v^2=1568\\v\approx 39.6\,\,m/s[/tex]

which agrees with the first answer shown.

Answer:

any characteristic of matter that can be observed without changing the identity of the material. Scientists call a characteristic of matter that you can detect with your senses a Physical property. color, shape, smell, taste, mass, volume, and density.

Explanation:

Answer:

5,000J

Explanation:

GPE = mass x gravity x height

GPE = 10 x 10 x 50

= 5,000

Answer:

3.678kJ

Explanation:

Given

mass= 75kg

height= 5 m

g= 9.81m/s^2

Required

Potential energy

PE= mgh

substitute

PE= 75*9.81*5

PE=3678.75J

PE= 3.678kJ

Answer:

See the explanation below.

Explanation:

An example of renewable energy is wind energy, since the planet by means of pressure variations among other natural phenomena presents air currents that can rotate the propellers of energy-generating turbines. This energy is renewable because the wind is used as a source of this energy.

An example of non-renewable energy is oil as it has been formed by carbon-containing fossils that have remained in the Earth's layers for millions of years. It is a non-renewable source since the amount of oil is finished after its total extraction from one well and for the generation of another well will depend on geological processes that last millions of years.

Answer:

D.

Explanation:

There are three physical properties of matter that involves solid, liquid and gas.

The last statement is correct as it says: boiling and melting points are similar as both changes the physical state of matter. But are different as boiling point changes liquid into gas for example: liquid at high boiling point changes into vapors (gas) and melting point changes solid into liquid for example: ice at high melting point changes into liquid.

Hence, the correct option is "D".

Answer:

1.52s

Explanation:

Given parameters:

Acceleration  = 63m/s²

Final velocity  = 96m/s

Unknown:

Time taken  = ?

Solution:

To solve this problem, we use one of the kinematics equation:

        v  = u + at

v is the final velocity

u is the initial velocity

a is the acceleration

t is the time taken

So;

           96  =  0 + 63t

             t  = 1.52s

Answer:

attached below

Explanation:

Answer:

50%

Explanation:

Given parameters:

Work output  = 30J

Work input  = 60J

Unknown:

Efficiency of the lever  = ?

Solution:

To solve this problem, the efficiency is taken as the ratio of the work output to that of the work input;

 Efficiency  = Work output / Work input  x 100

Efficiency  = [tex]\frac{30}{60}[/tex]  x 100  = 50%

Answer:

atmosphere

Explanation:

i took the test and got it right

Answer: isotopes

Explanation:

Answer:

Their father applied more force to Jordan than Kathy.

Explanation:

Answer Maybe try 400

Explanation:

Multiply

Answer:

16 Newtons

Explanation:

The equation for work is Joules = Force x Distance(Meters). Substituting in the values leaves us with 80 = F * 5. Evaluating this equation, we can conclude that the amount of force used was in fact 16 Newtons.  

Answer:

Hiya your answer's up

Down

6- dioxide

Explanation:

Average speed =total distance ÷ total time

speed = d ÷ t

d= 74400

t= 16

then,

speed = 74400÷16

=4650

Answer:

The largest earthquake ever been recorded is explained below in detail.

Explanation:

Earthquakes are normally produced when stone underground swiftly fractures along a fault. This immediate discharge of pressure causes the seismic waves that make the terrain shake.

Valdivia Earthquake was the most strong quake was the 9.5-magnitude Valdivia Earthquake that punched in Chile in 1960, That quake generated a tsunami, which together slaughtered an approximated 5,700 people.

Answer:

1. W = 900 J

2. a = -450000 m/s²

Explanation:

2.

First, we calculate the deceleration of the bullet by using 3rd equation of motion:

[tex]2as = V_{f}^{2} - V_{i}^{2}\\[/tex]

where,

a = deceleration = ?

s = distance traveled = 0.1 m

Vf = Final Speed = 0 m/s (it eventually stops)

Vi = Initial Speed = 300 m/s

Therefore,

[tex]2a(0.1\ m) = (0\ m/s)^{2} - (300\ m/s)^{2}\\a = \frac{-90000\ m^{2}/s^{2}}{0.2\ m}\\\\[/tex]

a = -450000 m/s² (negative sign shows deceleration)

1.

Now, we calculate the force using Newton's Second Law:

[tex]F = ma\\F = (0.02\ kg)(-450000\ m/s^{2})\\F = - 9000\ N[/tex]

Negative sign shows decelerating force.

For work done:

[tex]Work\ Done = W = Fs\\W = (9000 N)(0.1\ m)[/tex]

W = 900 J

Answer:

It gets a new rock when it is getting older

Explanation:

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Answer:

135

Explanation:

Multiply 3x45 So the overall answer is 135

Answer:

d-135m

Explanation:

Answer:

Explanation:

The canon is heavier than the canon ball.

Answer:

True

Explanation:

Velocity is a vector quantity, which means that it carries both magnitude and direction. Hence when direction of a particle changes, although magnitude (speed) may remain same, it's velocity changes due to direction change. For ex. A particle is m... A particle is moving along x axis with speed 1m/s, it's velocity will be represented as 1i (i represents unit vector along x)

But if it now starts moving along y axis, it's velocity is 1j (j represents unit vector along y axis). Hence velocity changes with direction.

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