Answer: Reliable and trusted
The sources used in the scientific research purpose should be reliable.
Explanation:
In doing the scientific research, the sources must not be of popular kind but should be representative kind which could represent the material and method adopted in the research very well. The sources are never termed as new or old sources, as the source is not bounded by time but space.
The source applicability is defined by the parameter used in the specified location and not time. Therefore, the source must be reliable which could give definite information and trustworthy.
Which of the following types of stars had the smallest initial mass? Blue main sequence Neutron star Red supergiant White dwarf
Answer:
White dwarf
Explanation:
The Hertzsprung-Russell Diagram shows the mass of stars, the color, temperature and their brightness.Stars that lie below the main sequence area such as the White dwarf have the smallest initial mass.A white dwarf star has a mass less than that of the Sun.
Answer:
White Dwarf
Explanation:
The ampere is a unit of which physical quantity?
For this case we have by definition, that the Ampere, is the unit of electric current intensity.
For its part, the electric current is a measure of the velocity at which the electric charge flows.
The symbol of the current is A. We have that 1 Ampere is equivalent to an electric charge of a coulomb per second.
[tex]1A = \frac {1C} {s}[/tex]
Answer:
[tex]1A = \frac {1C} {s}[/tex]
A material that provides resistance to the flow of electric current is called a(an) (1 points)
Answer:
A Resistor.
Explanation:
Hope my answer has helped you and if not i'm sorry.
Alfred pushes on a heavy box, but cannot move it. The box has a lot of _____. inertia motion friction gravity
Answer:
Inertia
Explanation:
Inertia is best defined as the ability of an object to resist a change in position or movement. That is why when an object has a higher mass, the higher the inertia. Imagine an oncoming truck that is fully loaded versus you. The tendency for the truck to change its movement would be difficult because of its its mass. It has a lot of inertia.
The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?
Answer:
2.7
Explanation:
This is because fluorine has an atomic number 9
Answer:
2, 7
Explanation:
Fluorine has 9 electrons and electronic structures are written listing the amount of electrons in each shell/energy level starting from the first one.
The first one can hold a maximum of 2 electrons and the 2nd, 3rd and 4rth can hold a maximum of 8
A yellow object on a blue background
appears as
[IE-05)
a. White
b.Black
c. Green
d. Red
V-I graphs for two wires A and B are shown in the figure. If we connect both the wires
one by one to the same battery which of the two will produce more heat per unit time?
Justify your answer
В
(2)
PLEASE HELP: Which of the following is true about comets in our solar system?
a. Being mini-stars, they are made of gas.
b. They were discovered in the 17th century.
c. They take roughly the same amount of time to orbit the sun.
d. They all orbit the sun due to the sun’s gravity.
Answer: I think the answer is D. I'm sorry if it is incorrect.
A cold coke bottle is on the pan of a balance and is left open. What happens to its weight?
Answer:
It's weight would decrease over time.
Explanation:
The cold coke is going to stabilise in the room temperature. This causes the coke to heat up to room temperature. When the coke heats up, some molecules acquire enough kinetic energy that the evaporate. The evaporation of the molecules causes a decrease in weight.
Hope it helped!
Answer:
it's weight will decree over time
Explanation:
because the ice will tern to winter than it will evaporate
The metric unit of electrical power is the _____. watt volt ampere ohm
The answer is the second option "watt." Watt is the unit of power measured by one joule per second. Watts are a amount of electrical power and measured by the rate of energy transfer between two things.
Hope this helps.
A car jack with a mechanical advantage of 6 needs to produce an output force of 600 N to raise a car. What input force is required? 6 N 100 N 600 N 3,600 N
Answer:
Input force = 100N
Explanation:
Formula
Mechanical Advantage = output force / input force.
Givens
MA = 6
Output Force = 600 N
Input Force = ??
Solution
6 = 600 / x
Multiply both sides by x
6x = (600/x)*x
6x = 600
The xs cancel. Now Divide by 6
6x/6 = 600/6
x = 100 N
Answer:
100n
Explanation:
What frequency will you hear if a truck is driving toward you at 20 m/s sounding a horn of frequency 300 Hz. Assume the speed of sound to be 340 m/s.
Answer:
=319Hz
Explanation:
This question is on sound waves
General formulae;
Frequency of observer= f of source*[ (v of sound+ v of observer)/(v of sound-v of source)]
where f is frequency and v is velocity
Given;
Velocity of sound = 340m/s
frequency of source = 300 Hz
Velocity of observer=0m/s
Velocity of source/truck= 20m/s
Substitute values in the formulae;
Frequency of observer= 300× {(340+0)/(340-20)}
=300×{ 340/320}
=300×340/320
=318.75
=319Hz
The acceleration due to gravity is ____.
The acceleration which is gained by an object because of gravitational force is called its acceleration due to gravity. Its SI unit is m/s2. Acceleration due to gravity is a vector, which means it has both a magnitude and a direction. The acceleration due to gravity at the surface of Earth is represented by the letter g. It has a standard value defined as 9.80665 m/s2.[ However, the actual acceleration of a body in free fall varies with location. (Wikipedia)
The acceleration due to gravity is 9.89 m / s2.
Explanation:
Gravity was discovered by Newton when he was sitting under a tree and was watching an apple reaching the ground instead of going upwards. He fond that there is a gravitational pull attached to the ground of the earth which makes all the objects towards the ground. It is represented by 'g' and its value is equal to 9.8 m /s2.
A bar magnet cut in half will form a total of
poles.
a)four
b)eight
c)two
Answer:
A bar magnet is exactly 2 poles, if you cut it in half, you would have 4 poles.
Answer:
four
Explanation:
1,990,000,000,000,000,000,000,000,000,000 in scientific notation
Answer:
[tex]1.99 \times {10}^{30} [/tex]
Explanation:
Scientific notation should be in the form of
[tex]a \times {10}^{n} [/tex]
where
[tex]1 \leqslant a < 10[/tex]
Haley noticed a small spot on her skin that turned out to be skin cancer. Which treatment is her doctor most likely to use?
Answer:
B.) superficial external beam radiation therapy
Explanation:
This is used for skin cancer, correct on edge.
Superficial radiotherapy refers to radiation that does not penetrate deep into your body. Superficial external beam radiation therapy is used by the doctor for skin cancer.
What is Superficial radiotherapy?External radiation includes superficial radiotherapy. It is used to treat cancer that has spread to or near the skin's surface.
The term "superficial radiotherapy" refers to radiation that does not penetrate deep into your body.
Subtle radiotherapy can be performed using low-intensity x-rays (photons) or electrons. Your doctor will determine which one you require.
This is determined by the size and depth of cancer, as well as its location in the body.
Hence Superficial external beam radiation therapy is used by the doctor for skin cancer.
To learn more about Superficial radiotherapy refer to the link;
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A vector has an x-component
of -309 m and a y-component
of 187 m.
Find the magnitude of the
vector.
Explanation:
The magnitude of a vector v can be found using Pythagorean's theorem.
||v|| = √(vₓ² + vᵧ²)
||v|| = √((-309)² + (187)²)
||v|| ≈ 361
You can find the angle of a vector using trigonometry.
tan θ = vᵧ / vₓ
tan θ = 187 / -309
θ ≈ 149° or θ ≈ 329°
vₓ is negative and vᵧ is positive, so θ must be in the second quadrant. Therefore, θ ≈ 149°.
Answer:
2 answers. Pay attention
Explanation:
Acellus asks you to find Magnitude and vector. The questions are in separate answers. Type in 361 whenever it asks for Magnitude. When it asks for Vector type in 149.
Magnitude is 361
Vector is 149
How much heat is absorbed by 41 g iron skillet when its temperature varies from 9°C. to 20°C
Answer:
202.95J
Explanation:
The formulae for the energy absorbed by the iron skillet is;
q=m*c*ΔФ where q=energy absorbed, m is mass of iron skillet, c is specific heat capacity and ΔФ is change in temperature
Given that;
m= 41g
ΔФ=20°-9°=11°
c=0.45 J/g°C
q= 41×0.45×11
q= 202.95 J
Jason is a body builder. Despite being more fit, he weighs more than his brother Ryan, who is the same height. Which is a possible reason?
A.
Jason has more muscle mass than Ryan does.
B. Jason has more body fat than Ryan does.
c. Jason has more muscle mass and body fat than Ryan does
D. Jason has less body fat than Ryan does.
Answer: C. Jason has more muscle mass than Ryan
Explanation:
using the given data table, calculate the acceleration of the skateboarder. you can use either form of the equation below?
The acceleration of the skateboarder on road A, road B and road C is 7,75 m/s² , 3,87 m/s² and 9,68 m/s².
Further Explanation
Given
mᴀ = mʙ = mᴄ = 62 kg
Fᴀ = 480N
Fʙ = 240 N
Fᴄ = 600 N
Asked
aᴀ, aʙ, aᴄ = ?
Solution
Based on the question, we know that the mass of road A, road B and road C are same. And, the formula of acceleration is
[tex]\boxed{\text{a} = \frac{\text{F}}{\text{m}}}[/tex]
so, we can calculate the acceleration of road A, road B and road C.
• for road A
[tex]\text{a}_A = \frac{\text{F}_A}{\text{m}}[/tex]
[tex]\text{a}_A = \frac{480 \text{N}}{\text{62 \text{kg}}}[/tex]
aᴀ = 7,7419 m/s²
aᴀ = 7,75 m/s²
• for road B
[tex]\text{a}_B = \frac{\text{F}_B}{\text{m}}[/tex]
[tex]\text{a}_B = \frac{240 \text{N}}{62 \text{kg}}[/tex]
aʙ = 3,8709 m/s²
aʙ = 3,87 m/s²
• for road C
[tex]\text{a}_C = \frac{\text{F}_C}{\text{m}}[/tex]
[tex]\text{a}_A = \frac{600 \text{N}}{62 \text{kg}}[/tex]
aᴄ = 9,6774 m/s²
aᴄ = 9,68 m/s²
-----------------------------
Learn More1. Learn More About The First Newton Law https://brainly.com/question/10454047
2. Learn More About Acceleration https://brainly.com/question/418785
-----------------------------
ANSWER DETAILGrade: Middle School
Subject: Physics
Chapter: Motion and Kinematics
Keywords: Motion, Mass, Acceleration, Newton, Newton Law, Force, Kinematics
To find the acceleration of the skateboarder, use the provided data and the equation: acceleration = (final velocity - initial velocity) / time. Plug in the values and ensure all units are consistent, then solve.
Explanation:To calculate the acceleration of the skateboarder, you need to use the data given in the table and the equations of motion. Assume the data provides initial velocity (Vi), final velocity (Vf), and time (t).
The acceleration can be calculated using the formula: acceleration (a) = (Vf - Vi) / t. Make sure the velocities are in the same units and the time is in seconds to get the acceleration in meters per second squared (m/s²).
Plug in the values from the table into this equation to find the acceleration. For instance, if Vi = 2 m/s, Vf = 4 m/s, and t = 1 s, Then the acceleration would be (4 m/s - 2 m/s) / 1 s = 2 m/s².
Learn more about Acceleration here:https://brainly.com/question/11789833
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Which shows the correct order of steps during the formation of an ionic bond?
Ions are attracted to each other → Electrons are transferred → An ionic compound forms
An ionic compound forms → Ions are attracted to each other → Electrons are transferred
Electrons are transferred → Ions form → Ions are attracted to each other
Ions form → Electrons are transferred → Ions are attracted to each other
Answer:
Before I answer I want to say this Calibri is the superior font and green is the only highlight color.
The correct answer is C: Electrons are transferred → Ions form → Ions are attracted to each other
Explanation:
Generally, an ionic compound is formed between electropositive and electronegative elements.
Normally every element wants to occupy the inert gas configuration in order to be stable. During the ionic bond formation the electropositive metal will lose the electrons and forms cation. The electronegative metal will gain electrons and forms anion.
The cation is positively charged and the ion is negatively charged. Due to the coulombic force of attraction, the ions will be attracted to each other and forms an ionic compound.
One can take the example of NaCl where Na will lose one electron and form. Chlorine will take one electron and form. These ions are attracted and sodium chloride is formed.
Hence the formation of an ionic compound follows these steps-
1- First electrons are transferred.
2-The ions are formed
3-The ions are attracted to form the compound
17. What's the role of the sun's
gravity in the solar system?
O A. Keeps the planets orbiting
around the sun
O B. Prevents the sun from falling into
a black hole
O C. Slowly pulls the planets toward
the sun
O D. Slowly pushes the planets away
from the sun
O Mark for review (Will be highlighted
on the review page)
Answer:
The purpose of the sun is to keep planets orbiting around it. Without the sun's gravity, the planets would not be orbiting around it, although it is impossible for a planet or a star or a planet to not have gravity. I hope you find this answer as the one you needed, please mark me as brainiest answer. Aka Answer A.)
Gravity is the property of every object that has mass. The gravity of the sun keeps the planets orbiting around the sun in the solar system.
What is Gravity?It is the force that attracts the less massive objects towards their center of mass. Sun also has huge gravity (Force), Hence it attracts the plates towards itself.Earth also has gravity, but very less than that of the sun. Hence the gravity cause planets to keep orbiting around the sun. Gravity is the least powerful force of the universe but it works up to a huge distance.Therefore, the gravity of the sun keeps the planets orbiting around the sun in the solar system.
Learn more about Gravity,
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A block of size 20m x 10 mx 5 m exerts a force of 30N. Calculate the
maximum & minimum pressure exerted by the block on ground?hello yeah tell me the answer of this question
Answer:
We know that force applied per unit area is called pressure.
Pressure = Force/ Area
When force is constant than pressure is inversely proportional to area.
1- Calculating the area of three face:
A1 = 20m x 10 m =200 Square meter
A2 = 10 mx 5 m = 50 Square meter
A3 = 20m x 5 m = 100 Square meter
Therefore A1 is maximum and A2 is minimum.
2- Calculate pressure:
P = F/ A1 = 30 / 200 = 0.15 Nm⁻² ( minimum pressure)
P = F / A2 = 30 / 50 = 0.6 Nm⁻² ( maximum pressure)
Hence greater the area less will be the pressure and vice versa.
Maya sets up two experiments as shown. What question is Maya most likely trying to answer? How does the type of material used in the core affect the strength of an electromagnet? How does the number of loops of wire affect the strength of an electromagnet? How does the speed at which an iron bar is removed from wire loops affect the strength of an electromagnet? How does the thickness of the wire affect the strength of an electromagnet?
Answer:
D
Explanation:
The correct answer is D
How does the thickness of the wire affect the strength of an electromagnet?
Answer:
How does the thickness of the wire affect the strength of an electromagnet
Explanation:
Generally, electromagnet strength increases with an increase in wire thickness. From the theory of electric circuit, the resistance of an electric wire is inversely proportional to the cross sectional area of the electric wire. Mathematically, we have:
R ∝ 1/A
Where:
R is the resistance of the electric wire; A is the cross sectional area of the wire. Therefore, for a large cross sectional area, the resistance will be very low, and the electric current passing through the electromagnet will be high. This will create a very high magnetic field. Thus, the question that Maya will most likely answer is: How does the thickness of the wire affect the strength of an electromagnet.
a 230-newton box rests on a plank 5 meters long. One end is 1.2 meters higher than the other end. Find the components of the force the box exerts
Answer:
55.3 N, 223.3 N
Explanation:
First of all, we can find the angle of the inclined plane.
We have:
L = 5 m the length of the incline
h = 1.2 m is the height
We also have the relationship
[tex]h = L sin \theta[/tex]
where [tex]\theta[/tex] is the angle of the incline. Solving for the angle,
[tex]\theta= sin^{-1} (\frac{h}{L})=sin^{-1} (\frac{1.2 m}{5 m})=13.9^{\circ}[/tex]
Now we can find the components of the weight of the box, which is the force that the box exerts on the plank. Calling W = 230 N the weight of the box, we have:
- Component parallel to the incline:
[tex]W_{par} = W sin \theta = (230 N)(sin 13.9^{\circ}) =55.3 N[/tex]
- Component perpendicular to the incline:
[tex]W_{per} = W cos \theta = (230 N)(cos 13.9^{\circ}) =223.3 N[/tex]
Find the magnitude of pressure in Pascal of 150N that acts normally on area. Of 0.25m2
Answer with Explanation:
When solving a problem in math, chemistry or physics, it is necessary to understand all the words and their definitions. If not, start with finding out their meanings, one by one.
Here the key word to know is pascal, (P), which is a unit of measure for pressure, defined as
pressure = Force / applied area
1 pascal = 1 newton / square metre or
1 P = 1 N/sq.m.
Here, we have been given:
Force = 150 N
Area = 0.25 m^2.
Thus the pressure
= Force / Area
= 150 N / 0.25 m^2
= 150/0.25 N/m^2
= 600 pascals.
[ note that the abbreviations are written in capitals, while the full words, units of measurement, are written without capitalization, since they are no longer proper names]
you add 800 ml of water at 20c to 800 ml of water at 80c what is the most likely final temperature of the mixture ?
a. 100c
b. 60c
c. 25 c
d.50c
Answer:
d. 50 C
Explanation:
In this problem, we have to add 800 ml of water at 20 Celsius to 800 ml of water at 80 Celsius.
According to the 2nd law of thermodynamics, heat transfers from hot to cold temperature.
The quantity of both the different waters is equal so this makes it very easy. All we have to do is find the mean of both the temperatures:
Final temperature = (20 C + 80 C)/2
= 50 Celsius
Answer: D. 50 C
Explanation:
Four different observers are standing in a straight line on a street and hear a siren from a police car. Each person recorded their observations in the chart shown.
If the people are all lined up on the street at different blocks, and the police siren starts at block 3, which statement describes what block each person is standing at?
Wycleff is on block 1, Lilly is on block 4, Quincy is on block 12, and Emilia is on block 17.
Lilly is on block 1, Wycleff is on block 4, Quincy is on block 12, and Emilia is on block 17.
Lilly is on block 1, Wycleff is on block 4, Emilia is on block 12, and Quincy is on block 17.
Wycleff is on block 1, Lilly is on block 4, Emilia is on block 12, and Quincy is on block 17.
Answer:
D
Explanation:
Wycleff heard a low pitch sound the whole time, so the police car must have been moving away from him. So he was at block 1.
Lilly observed a Doppler effect (change in pitch) first. So the car must have passed her first, so she was at block 4.
Emilia observed a Doppler effect after Lilly. So the car passed her after it passed Lilly, so she was at block 12.
Quincy heard a high pitch sound the whole time, so the police car must have been moving toward him. So he was at block 17.
Wycleff is on block 1, Lilly is on block 4, Emilia is on block 12, and Quincy is on block 17. Therefore, the correct option is option D.
What is doppler effect?The apparent change in frequency caused by an observer moving relative to the wave source is called as that of the Doppler effect, Frequency deviation, or simply Doppler, according to the circumstances. The phenomenon is named after Christian Doppler, the Austrian physicist who originally observed it in 1842.
The entire time, Wycleff would hear a low-pitched sound, suggesting that the police car was moving away from him. As a result, he was in block 1.
The very first thing Lilly saw was a Doppler effect (a pitch change). Due to her position in block 4, the car should really have bypassed her first.
Emilia saw a Doppler effect after Lilly. She was at block 12 whenever the car passed Lilly before overtaking her.
Quincy had been hearing a high-pitched sound the entire time, which signaled that perhaps the police car was coming. As a result, he was in block 17.
Therefore, the correct option is option D.
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According to Newton's first law of motion, what will an object in motion do when
external force acts
come to a stop
move at the same velocity
speed up
change direction
It could speed up, change direction, come to a complete stop, or slow down without stopping.
The one thing the object could NOT do is keep moving with the same velocity. Its velocity must change.
Answer:
move at the same velocity
Explanation:
:>
The proper order of the cycle of addiction is
Answer:
The answer would be drug use, addiction, dependence, tolerance, and withdrawal.
Answer:
D. drug use, tolerance, dependence, addiction, and then withdrawal
Explanation: took the test rn on edge 2020