Can electromagnetic waves travel in a vacuum?

Yes
Or
No

Answer:

0.25 m

Explanation:

 λ = v/f

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Answer:

Mechanization   perhaps

Explanation:

Answer:

Conduction is the process by which heat energy is transmitted through collisions between neighboring atoms or molecules

Explanation:

Answer:

The liver filters the blood of toxins before it continues through the body. It also removes excess sugar from the arteries. Your kidney then further filters the blood for water-soluble waste and toxins to be excreted and finally, your bladder gets read of that water-soluble waste.

The center of mass is the point located in an average position concerning the objects' positions and their masses. (a/3;a/3) is the location of the COM.  

The center of masses of a given system of particles or objects is the position under which all external forces are acting. Any uniform force acts on this point.

This position is the average position of all the components of the system concerning their masses. It can be placed in one, two or three dimensions according to the system.

Coordinate X of the center of masses is given by the following formula,

Xcom = Σ(Ximi) / Σmi

This is the adition (Σ) of each particle position on the X-axis (Xi) multiplied by their mass (mi), and the result divided by the summation of all masses -total mass-.

In the same way, coordinate Y of the center of masses is given by the following formula,

Ycom = Σ(Yimi) / Σmi

This is the adition (Σ) of each particle position on the Y-axis (Yi) multiplied by their mass (mi), and the result is divided by the summation of all masses.

The center of masses is located in the position (X, Y).

According to this framework, we can get the coordinates of the center of masses for this bidimensional system. Coordinates can be expressed in meters or centimeters (m or cm).

Data:

     Particle ⇒ (X;Y)

Coordinate X  ⇒  Xcom =  Σ(Ximi) / Σmi

                             Xcom =  (0m) + (0m) +(am) / m +m +m

                             Xcom =  am / 3m

                             Xcom =  a/3

Coordinate Y  ⇒  Ycom =  Σ(Yimi) / Σmi

                             Ycom =  (am) + (0m) +(0m) / m +m +m

                             Ycom =  am / 3m

                             Ycom =  a/3

Coordinates of the center of masses, (X;Y) = (a/3 ; a/3)

(a/3 ; a/3) is the location of the center of mass in the proposed bidimensional system.

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The height, h to which the package of mass m bounces to depends on its initial velocity, v and the acceleration due to gravity, g and is given below:

[tex]h = \frac{v^{2}}{2g}[/tex]

Perfectly elastic collisions are collisions in which the momentum as well as the energy of the colliding bodies is conserved.

In perfectly elastic collisions, the sum of momentum before collision is equal to the momentum after collision.

Also, the sum of kinetic energy before collision is equal to the sum of kinetic energy after collision.

Since some of the Kinetic energy is converted to potential energy of the body;

[tex]\frac{mv^{2}}{2} = mgh[/tex]

[tex]h = \frac{v^{2}}{2g}[/tex]

Therefore, the height to which the package m bounces to depends on its initial velocity and the acceleration due to gravity.

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A symptom of schizophrenia could be having unusual beliefs that have no factual basis. The given statement is true.

Schizophrenia is a serious mental illness that impairs a person's ability to think. It mostly affects persons between the ages of 16 and 35. A mental health practitioner can diagnose the onset of schizophrenia.

Schizophrenia symptoms include:

1. Delusions are irrational ideas or perceptions that have no basis in reality.

2. Disorientation is a symptom of an inability to perform normally. When a person has hallucinations, he or she sees or hears things that are not real.

So, having strange views with no factual foundation might be an indication of schizophrenia, which is TRUE.

Hence the given statement is true.

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Answer:

true

Explanation:

got 100 on Edge

Answer:

option d is your answer

Explanation:

you can find the complete solution in the given attachment

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Answer:

they have nothing in common, the avocado turning brown is a chemical change while, the dinosaur bone turning into rocks over millions of years is a physical change.

Answer:

Thrust / Lift / Gravity

Explanation:

He must create enough force of thrust to jump for a short time and gravity pulls him back down almost immediately.

Answer:

gravity and resistance, the man is moving so the force is unbalanced

Explanation:

Answer:

Yes, the driver has traveled far enough to reach the office.

Explanation:

Starting at 50 km/h you can break the 50 into 4 sections (50/4 or 1/4 of 50) and that will get you 12.5

45 minutes are 3/4 of an hour which is 50 km/h.

12.5*3=37.5 km (37.5>30)

Answer:

When the circuit is not connected, the pointer of the ammeter or voltmeter is exactly at zero, thus said to be the instrument has zero error. If the pointer is above the zero mark, the zero error is negative.

Answer:

1389.1

For Acellus

Explanation:

The electric field equals the force exerted by the unit positive charge. The electric field at point P is 3.615×10⁶  N/C. Its unit is N/C.

When a charged particle is got influenced by another charged particle when bring near to it, a field is created by an electric charge. This field is called the electric field.

The electric field is obtained by taking the ratio between Force and unit positive charge. Force in a charge is because of attraction and repulsion. The SI unit of force is Newton (N).

The unit positive charge is the test charge used to analyze the other charges present in the field. The SI unit of charge is Coloumb (C). The charge is responsible for the creation of an electric field.

From the givens,

The charge  q₁ = q₂ = 5×10⁻⁸ C,

The distance of charges from point P, r₁ = 0.424 m; r₂ = 0.636 m.

The net electric field E = E₁ + E₂

Electric field E = F / q

 E₁ = kq₁ / r₁²          (k = 9×10⁹ Nm²/C²)

     =  9×10⁹× 5×10⁻⁸ / (0.424)²

  E₁   = 2.503×10³ N/C.

E₂ = kq₂ / r₂²

    = 9×10⁹× 5×10⁻⁸ / (0.636)²

E₂ = 1.112×10³ N/C

E = E₁ + E₂

  =2.503×10³ + 1.112×10³

  = 3.615×10³ N/C

Hence, the net electric field is 3.615×10³ N/C.

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Answer:

it should be 21,3 kilometer

The speed of the sound wave after the flash was seen, in the experiment for measuring the speed of sound gun is 110 m/s.

The speed of the sound wave can be determined by applying the principle of echoe as shown below;

v = 2d/t

where;

v = (2 x 715) / (13)

v = 110 m/s

Thus, the speed of the sound wave after the flash was seen, in the experiment for measuring the speed of sound gun is 110 m/s.

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Answer:

C is radius of sphere

Explanation:

F is C/2

Explanation:

[tex]w = mg \\ w = 25kg \times 9.8 \frac{m}{s} ^{2} \\ w = 245\\ [/tex]

The time taken for the water to boil at the given rate of the alpha decay is 0.08 s.

The number of radium atom in 1.0 g is calculated as follows;

[tex]N = N_A(\frac{m}{M} )\\\\N = (6.02 \times 10^{23})(\frac{1}{223} )\\\\N = 2.7 \times 10^{21} \ atoms[/tex]

[tex]\lambda = \frac{ln2}{t_{1/2}} \\\\\lambda = \frac{ln 2}{(11.43 \times 86400)} \\\\\lambda = 7.02 \times 10^{-7} \ s^{-1}[/tex]

R = λN

R = (7.02 x 10⁻⁷) x (2.7 x 10²¹)

R = 1.895 x 10¹⁵ atoms/s

Δm = m(Ra₂₂₃) - [m(Rn₂₁₉) + m(α)]

Δm = 223.018u - (219.008u + 4.0026u)

Δm = 0.0074u

[tex]E =\Delta mc^2\\\\E = 0.0074u \times c^2\\\\E = 0.0074 \times931.5\ MeV/c^2 \times c^2\\\\E = 6.893 \ MeV\\\\E = 6.893 \times 10^6 \times 1.6\times 10^{-19} \\\\E= 1.103 \times 10^{-12} \ J[/tex]

P = E/t = ER

P = (1.103 x 10⁻¹²)(1.895 x 10¹⁵)

P = 2,089.99 J/s

mass = density x volume

mass = (1 g/L) x (0.46 L)

mass = 0.46 g

Q = mcΔT

Q = 0.46 x 4.184 x (100 - 16)

Q = 161.67 J

Pt = Q

t = Q/P

[tex]t = \frac{161.67}{2,089.99} \\\\t = 0.08 \ s[/tex]

Thus, the time taken for the water to boil at the given rate of the alpha decay is 0.08 s.

The complete question is below:

How long will it take the water to boil?

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F_net:-

Now

Apply Newton's second law

Answer:

d. none is the answer we can't hear and see

It is true that as the distance d between a planet and a moon is increased, the strength of tidal forces decreases linearly (i.e., the strength of tides scales as 1.

Tidal force is the gravitational force that a body on a linear motion experiences which pull the body towards the center of the mass of another varying body because of the gravitational pull of that body at a distance.

Therefore, It is true that as the distance d between a planet and a moon is increased, the strength of tidal forces decreases linearly (i.e., the strength of tides scales as 1.

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Answer:

w = 40 Joules

Explanation:

Formula to get work:

W = F × S

where:

w = work/Joules

F = force/newtons

s = displacement/meters

substitute:

w = 20 × 2

w = 40J

The magnet will be a useful tool to pick the paper clips because the magnet can attract the paper clips.

The like poles of magnets repel while unlike poles of magnets attracts. Magnets attracts irons or metallic materials.

The paper clips are mettalic or made of iron and hence the magnet will attract them.

There we can conclude that the magnet will be a useful tool to pick the paper clips because the magnet can attract the paper clips and will help to gather them together for easy picking.

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Answer:

1. Energy can neither be created or destroyed.

2. Conduction. Putting a pot of water on a hot burner. Convection. Putting your wet shoes over an air vent to dry them quicker. Radiation. Sitting in front of the fire to warm your hands up.

3. renewable sources can be used again and again, but non renewable sources cannot.

4. I would recommend solar energy. I think solar energy should be considered because solar energy can be reused, and also because they can use it to power their houses and they wouldn't need fossil fuels to do so.

5. Turn off the lights and open the windows during the day and if something is left plugged into the wall and it is not being used, unplug it.

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Explanation:

The correct number from the options to describe the length of this metal bar is 15 cm or fifteen centimeters.

The most common units to measure length include:

The unit that should be used is centimeters, considering a rule usually contains centimeters, and this is the unit provided in the image.

Moreover, based on the rule it can be determined the length is 15 centimeters. Other numbers such as 15.0 or 15.000 are innaccurate as there is not need to add more figures in this case.

Note: This question is incomplete because the image is missing. Here is the image

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Answer:

Explanation:

The slope of the graph is the spring constant     n/m