Answer:
The Answer is Star's Parallax.
Explanation:
It is the straighforward way to determine to find the distance to a nearby star.
A 3.0- resistor is connected in parallel with a 6.0- resistor. This combination is connected in series with a 4.0- resistor. The resistors are connected to a 12-volt battery. How much power is dissipated in the 3.0- resistor
Answer:
5.33 w
Explanation:
parallel resistors equivalent r = r1 r2 /(r1+r2) = 2 ohm
in series with 4 ohm resistor makes total r = 6 ohms
12 v / 6 ohm = 2 amps current
2/3 of the current will go through the 3 resistor
2/3 * 2 = 4/3 amp
power = I^2 R = 4/3 ^2 * 3 = 5.33 watts
Determine the energy in ev of a photon when electron transit from third level to the first level
energy of hydrogen atom *
A) 12 ev
B) O 1.2 ev
C) 0.12 ev
Answer:
One way of writing frequency difference for "Lyman" series is
f = 3.289 * 10^15 (1 / 1^2 - 1 / n^2)
f = 3.289E15 * (1 - 1/9) = 2.924E15 as frequency difference of terms
E = h f = 6.63E-34 * 2.924E15 = 1.938E-18 Joules
1 eV = 1.60 * 10^-19 Joules
1.938 / .16 = 12.1 eV
If a 10 kW device is used for 15 mins then the amount of energy transferred is
Answer:
9,000,000J
Explanation:
10kW is converted to Joules by multiplying 1000. Which is 10000W
15 minutes is converted to seconds, which is 900s
Energy transfer is Power(J) × Time(s)
so: 1000× 900
=9,000,000 J or 9000 kJ
Which of the following lists of elements is ordered by increasing number of valence electrons?
A.Li,C,O,F
B. F, O, N, C
C. O, S, Se, Te
D. Sr, Ca, Mg, Be
The list of elements with increasing number of valence electrons are Sr, Ca, Mg, Be.
What is valence electrons?Valence electrons are the electrons that is found at the outer shell of an atom which make the atom to form a chemical bond in which each atom involve contribute one or more valence electrons to form the bond.
Therefore, The list of elements with increasing number of valence electrons are Sr, Ca, Mg, Be.
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A second-grade teacher dropped a box of paper clips and they scattered all over the floor. She then asked her students, "Why will a magnet be a useful tool to pick the paper clips?"
The magnet will be a useful tool to pick the paper clips because the magnet can attract the paper clips.
Attraction of magnetsThe 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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PLEASE I NEEDHELP !!!!!!!!!!
In the diagram, q1 and q2 are both
+5.00*10^-8 C. What is the electric field
at point P? Include a + or - sign to
indicate the direction.
91
P
92
0.636 m
+ 0.424 m-**
(Remember, E points away from + charges,
and toward - charges.)
(Unit = N/C)
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.
What is an electric field?
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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Describe at least one technological application of radioactive decay that can benefit human health.
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
Does any substance exist that has particles with no motion? Explain your position
Answer:
solid
Explanation:
In a solid, particles are packed tightly together so they don't move much. The electrons of each atom are constantly in motion, so the atoms have a small vibration, but they are fixed in their position. Because of this, particles in a solid have very low kinetic energy.
Roxanne’s italian teacher was talking about how adjectives are placed after the noun, unlike in english. the teacher is instructing the students in the __________ of italian. semantics morphemes phonemes syntax
The teacher is instructing the students in the syntax of italian.
What is an adjective?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.
Learn more about syntax here:
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Answer:
d. syntax
Explanation:
What will happen if there is no oxygen for 2mins???
Without oxygen, there would not any fire and the combustion process in our vehicles would stop. Every mode of transport except electric would fail instantly. Planes flying high in the sky would fall on earth and millions of cars running on petrol and diesel would stop on the roads.
If a gas has the same temperature throughout, which gas molecule has the highest average velocity?
Answer:
H2
Explanation:
The highest average velocity is H2.
I hope it helps! Have a great day!
Anygays-
At peak brightness, the white dwarf supernova is approximately __________ times as luminous as the massive star supernova at its peak brightness.
Answer:
3
Explanation:
3 times as lumiunous
When there's a hazard ahead, it's almost always quicker for you to _________ than to come to a full stop.
When there's a hazard ahead, it's almost always quicker for you to steer away than to come to a full stop.
What is an hazard?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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how do two positive electric charges react to each other?
Answer:
The two positive electric charges repel each other. If a positive charge and a negative charge interact, their forces act in the same direction, from the positive to the negative charge. As a result opposite charges attract each other: The electric field and resulting forces produced by two electrical charges of opposite polarity.
Explanation:
Hope this helps!
-PBvibes
<3
Answer:
they repel each other
Explanation:
If a positive charge and a negative charge interact, their forces act in the same direction, from the positive to the negative charge. As a result opposite charges attract each other: The electric field and resulting forces produced by two electrical charges of opposite polarity.
What is the argument the author presents in lines 8-10? A) One is not expected to retaliate to threats and injury. B) One is not expected to simply accept threats and injury. C) One is expected to understand the likelihood of threats and injury. D) One is not expected to threaten, harm or injure people or property.
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.
What is argument?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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What do these two changes have in common?
a piece of avocado turning brown
a dinosaur bone turning into rock over millions of years
Select all that apply.
Both are only physical changes.
Both are chemical changes.
Both are caused by heating.
Both are caused by cooling.
Submit
a piece of avocado turning brown a dinosaur bone turning into rocks over millions years physical or chemical
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.
Amjad holds a brass cylinder in each hand. Cylinder A
has a mass of 100.0 g and cylinder B has a mass of 300.0 g. What upward forces do his two hands exert to keep the cylinders at rest? If he then drops the two, with what acceleration do they fall? (Ignore air resistance.)
(with explanations)
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
If a car driver suddenly makes a sharp turn, the passenger slides to the side of the car because of
Your answer:
Answer:
Inertia
Explanation:
It is inertia that causes the passengers to move toward the right side of the car. As the car swerves to left, passengers' body continues their motion as hitherto and as such it causes the passengers to move toward the right side of the car.
!! PLEASE PLEASE PLEASE MARK ME THE BRAINLIEST !!
Answer:
inertia
Explanation:
The radium isotope 223Ra, an alpha emitter, has a half-life of 11. 43 days. You happen to have a 1. 0 g cube of 223Ra, so you decide to use it to boil water for tea. You fill a well-insulated container with 460 mL of water at 16∘ and drop in the cube of radium
The time taken for the water to boil at the given rate of the alpha decay is 0.08 s.
Number of radium atom
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]
Decay constant of the radium[tex]\lambda = \frac{ln2}{t_{1/2}} \\\\\lambda = \frac{ln 2}{(11.43 \times 86400)} \\\\\lambda = 7.02 \times 10^{-7} \ s^{-1}[/tex]
Rate of the alpha decayR = λN
R = (7.02 x 10⁻⁷) x (2.7 x 10²¹)
R = 1.895 x 10¹⁵ atoms/s
Change in the mass of the RadiumΔm = m(Ra₂₂₃) - [m(Rn₂₁₉) + m(α)]
Δm = 223.018u - (219.008u + 4.0026u)
Δm = 0.0074u
Energy released in the alpha decay[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]
Rate at which energy is releasedP = E/t = ER
P = (1.103 x 10⁻¹²)(1.895 x 10¹⁵)
P = 2,089.99 J/s
Mass of the boiled watermass = density x volume
mass = (1 g/L) x (0.46 L)
mass = 0.46 g
Heat absorbed by the waterQ = mcΔT
Q = 0.46 x 4.184 x (100 - 16)
Q = 161.67 J
Time taken for the water to boilPt = 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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According to Newton's 1st Law of Motion, a moving object will move forever at a constant rate in the same direction. Why do objects stop moving?
Please help!
Answer:
Object stop moving when the force which is friction that acts to resist sliding between two touch-ing surfaces is not present
Answer:
See below ~
Explanation:
Newton's 1st Law of Motion : "An object in motion (or rest) will stay in motion (or rest) unless acted upon by an unbalanced force.
Objects stop moving due to the application of forceAn ball rolling on the road stops due to the frictional force of the roadAn apple falls from the tree due to gravitational forceWe can alter the motion of a football by applying force
When a chunk of cosmic material the size of a golf ball or a baseball hits the Earth's atmosphere it makes a
When a chunk of cosmic material the size of a golf ball or a baseball hits the Earth's atmosphere it makes a fireball.
What is meteor shower?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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An explosion is done on moon what effect will be its on earth
A. We can hear
B. We can see
C. We can hear and see
D. None
Answer:
d. none is the answer we can't hear and see
Give 2 to 3 examples of conservations of energy.
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:
Two moles of helium gas initially at 321 K
and 0.42 atm are compressed isothermally to
1.83 atm.
Find the final volume of the gas. Assume
that helium behaves as an ideal gas. The
universal gas constant is 8.31451 J/K·mol.
Answer in units of m^3
If the helium behaves as an ideal gas, its final volume is 0.13m³.
Ideal Gas Law
The ideal gas law states "that pressure multiplied by volume is equal to moles multiply by the universal gas constant multiply by temperature of gas. It is expressed;
PV = nRT
Where P is pressure, V is volume, n is the amount of substance, T is temperature and R is the ideal gas constant.
Given the data in the question;
Amount of helium gas; n = 2molTemperature T = 321KPressure P = 0.42atm = 42556.5PaUniversal gas constant R = 8.31451 J/K·mol = 8.31451 m³Pa/KmolVolume V = ?To determine the volume of the helium gas, we substitute our given values into the expression above.
PV = nRT
V = nRT / P
V = ( 2mol × 8.31451 m³Pa/Kmol × 321K ) / 42556.5Pa
V = 5337.91542m³Pa / 42556.5Pa
V = 0.13m³
Therefore, if the helium behaves as an ideal gas, its final volume is 0.13m³
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In what part of the atom are the
protons located?
A. in the nucleus Thy
B. in the neutron
C. in the electron
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
34. Identify the bond in SO3.
a. covalent
b. ionic
c. metallic
d. metalloid
Answer:
The answer is A.) Covalent
Explanation:
They share a double covalent bond.
-Hope This Helps!
-Justin ! :)
Please select all Non-Locomtor movements.
Pull
Run
Bend
Leap
Answer:
(1) Pull
(2) Bend
Those two are Non-Locomotor movements while others are Locomotor movements.
If this helps you please help me by giving brainliest. Thank you.
A spring hangs at rest from a support. If you suspend a 0.46 kg mass from the spring it elongates 0.79m.
A) Determine the spring constant.
B) Calculate the elongation if you put a .75kg mass on the spring.
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
A symptom of schizophrenia could be having unusual beliefs that have no factual basis. please select the best answer from the choices provided t f
A symptom of schizophrenia could be having unusual beliefs that have no factual basis. The given statement is true.
What is the definition of schizophrenia?
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
How does friction affect object acceleration down an incline?
Friction is the force that acts on the opposite side of direction of force, thus it manages to decelerate an object, so it acts upward along the plane