Iron has a density of 7.9 g/cm 3. What is the mass of a cube of iron with the length of one side equal to 55.0 mm

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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When there's a hazard ahead, it's almost always quicker for you to steer away than to come to a full stop.

Hazard refers to any obstacle or other feature which causes risk or danger.

Living organisms respond to hazards via the production of adrenaline hormone. This hormone causes a flight response away from the hazard.

Therefore, when there's a hazard ahead, it's almost always quicker for you to steer away than to come to a full stop.

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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.

Answer:

0.25 m

Explanation:

 λ = v/f

I hope it helped you

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:

The Answer is Star's Parallax.

Explanation:

It is the straighforward way to determine to find the distance to a nearby star.

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:

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:

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

When a chunk of cosmic material the size of a golf ball or a baseball hits the Earth's atmosphere it makes a fireball.

Meteor shower is an event that occurs when tiny particles of stones that are of the size of a golf ball or baseball hits the earth's atmosphere.

As the particles enters the earth's atmosphere, they create friction through rubbing against the particles of the air. This eventually causes the particles to heat up leading to the formation of a fireball.

Meteor shower usually occurs between midnight and the very early hours of the morning.

Therefore, when a chunk of cosmic material the size of a golf ball or a baseball hits the Earth's atmosphere it makes a fireball.

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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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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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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:

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:

oh hi chimmy

Explanation:

jimmi jimmi jimin

Answer: 0.98N for Cylinder A and 2.943N for Cylinder B

Explanation:

Cylinder A = 100g = 100*10^-3kg =0.1kg

Cylinder B = 300g = 300*10^-3kg = 0.3kg

gravitational force g= 9.81m/s^2

For cylinder A Force = mg= 0.1*9.8=0.98N

For Cylinder B Force = mg= 0.3*9.81= 2.943N

F_net:-

Now

Apply Newton's second law

Answer:

In the neucleus :)

Explanation:

Protons are found insidde of the neucleus of an atom. Electrons are found on the outside of the neucleus. :)

Have an amazing day!!

Please rate and mark brainliest!!

Answer:

nucleus

Explanation:

Protons ans nuetrons are inside the nucleus

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:

Mechanization   perhaps

Explanation:

Answer:

3

Explanation:

3 times as lumiunous

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.

hope I could help!

Explanation:

Explanation:

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

The teacher is instructing the students in the syntax of italian.

Adjectives are words that are used in English language to modify or describe a noun or a pronoun. Usually, adjectives are placed before the nouns they modify.

But creation of sentence, using words, to form a meaning the adjective can be placed after a noun. This is seen in formation of sentences using Italian language.

Syntax is the arrangement of words to creat a meaningful sentence. The most basic syntax follows a subject + verb + direct object formula.

Therefore, the teacher is instructing the students in the syntax of italian.

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Answer:

d. syntax

Explanation:

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

Answer:

Radiotherapy

Explanation:

Answer:

Radioisotopes are used in medicine as tracers to detect and diagnose medical problems. Radioisotopes are also used in radiation therapy to treat cancer.

Explanation:

sample answer on edge:3

We can actually see that the argument the author presents in lines 8-10 is: D. One is not expected to threaten, harm or injure people or property.

Argument, refers to the statement (s) that are made with the intention of determining the degree of truth of another statement.

We see here that the author presents an argument in lines 8-10 and the argument is "one is not expected to threaten, harm or injure people or property."

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a. The restoring force in the spring has magnitude

F[spring] = k (0.79 m)

which counters the weight of the mass,

F[weight] = (0.46 kg) g = 4.508 N

so that by Newton's second law,

F[spring] - F[weight] = 0   ⇒   k = (4.508 N) / (0.79 m) ≈ 5.7 N/m

b. Using the same equation as before, we now have

F[weight] = (0.75 kg) g = 7.35 N

so that

(5.7 N/m) x - 7.35 N = 0   ⇒   x = (7.35 N) / (5.7 N/m) ≈ 1.3 m