Answer:
Dependent variable- how fast is the time that Brian will react.Explanation:
Dependent variable - a variable that you can not manipulate and the one that is being observe.[tex]\tt{ \green{P} \orange{s} \red{y} \blue{x} \pink{c} \purple{h} \green{i} e}[/tex]
Name the type of forces involved in the following situations:
a) A rolling ball stops after covering some distance.
b) A magnet attracts a piece of iron.
c) Every object in the universe is attracted to each other.
Answer:
a. Frictional force
b. Magnetic force
c. Gravitational force
Answer:
frictional force
magnetic force
gravitational force
hope this helps!
Rearrange the equation below with the required unknown becoming the subject
a. V as subject
b. U as subject
c. a as subject
d. S as subject
Answer:
a.
[tex] {v}^{2} = {u}^{2} + 2as \\ v = \sqrt{ {u}^{2} + 2as} [/tex]
b.
[tex] {v}^{2} = {u}^{2} + 2as \\ {u}^{2} = {v}^{2} - 2as \\ u = \sqrt{ {v}^{2} - 2as} [/tex]
c.
[tex] {v}^{2} = {u}^{2} + 2as \\ 2as = {v}^{2} - {u}^{2} \\ a = \frac{ {v}^{2} - {u}^{2} }{2s} \\ \\ a = \frac{ {v}^{2} }{2s} - \frac{ {u}^{2} }{2s} [/tex]
d.
[tex] {v}^{2} = {u}^{2} + 2as \\ 2as = {v}^{2} - {u}^{2} \\ s= \frac{ {v}^{2} - {u}^{2} }{2a} \\ \\ s = \frac{ {v}^{2} }{2a} - \frac{ {u}^{2} }{2a} [/tex]
I hope I helped you^_^
A STONE IS THROWN VERTICALLY UPWARD WITH THE VELOCITY 25/s HOW LONG DOES IT TAKES TO REACH THE MAXIMUM HEIGHT?
Answer:
time taken to reach maximum height is 2.548 sec and Maximum height is 31.855 m
Explanation:
Initial velocity U= 25 m/s
at maximum height velocity, V= 0 m/s
Let the time taken to reach maximum height be t and maximum height be H.
V= U-gt
so 25-9.81.t=0
therefore t= 25/9.81 = 2.548 sec
Now,
H= Ut-1/2(gt^2)
=25x2.548-0.5x9.81x(2.548^2)
=31.855 m
Thank you
Q=U+pV solve for p please
Answer:
Q = U + pv
Q - U = pv
(Q - U) / v = p
14 km = m on conversions using a ladder method
BRAINLIEST PLS HELP
Imagine that you tested 20 high school students (15 male, 5 female). Twelve males and four females reported feeling a calming effect after exposure to the color blue.
In two to three sentences, explain what conclusions could be drawn from this information.
Answer:
Answer:
Explanation:
It means that out of 20 students, 3 males and 1 female were digital screen addicts because they were getting dangerous amount of blue light. Thus couldn't feel calming sensation that a human feels while seeing blue light. The rest students were getting balanced blue light. So they were getting relaxed feeling while being exposed to blue light.
The acceleration of a particle is given by a = c1 + c2v, where a is in millimeters per second squared, the velocity v is in millimeters per second, and c1 and c2 are constants. If the particle position and velocity at t = 0 are s0 and v0, respectively, determine expressions for the position s of the particle in terms of the velocity v and time t.
The expression for the position of the particle in terms of velocity and time is given as, s = vt
The given expression:
[tex]a = c_1 + c_2v[/tex]the unit of a = mm/s²the velocity, v = mm/sc₁ and c₂ are constantthe position of the particle at time, t = 0, is s₀ and v₀To find:
The expression for the position s of the particle in terms of the velocity v and time tDetermine the value of the constants from second equation of motion given as:
[tex]s = vt + \frac{1}{2}at^2\\\\substitute \ the \ given \ value \ of \ a\\\\s = vt + \frac{1}{2}(c_1 + c_2v)t^2\\\\s = vt + \frac{1}{2} c_1 t^2 + \frac{1}{2} c_2vt^2\\\\divide \ through\ by \ t^2\\\\\frac{s}{t^2} = \frac{v}{t} + \frac{1}{2} c_1 + \frac{1}{2} c_2v\\\\multiply \ through \ by \ 2\\\\\frac{2s}{t^2} = \frac{2v}{t} + c_1 + c_2v\\\\when \ t = 0\\\\0 = 0 +c_1 + c_2v\\\\c_1 + c_2v = 0\\\\from \ the \ original \ equation;\\\\s = vt + \frac{1}{2} (c_1 + c_2v)t^2\\\\[/tex]
[tex]s = vt + \frac{1}{2}(0)^2\\\\s = vt[/tex]
Thus, the expression for the position of the particle in terms of velocity and time is given as, s = vt
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Slove these problem physics
Answer:
element name = neon
no of proton = 10
no. if neutron = 9
atomic no. = 10
atomic weight = 20.17179u
it lies in group 18 and period 2
it is nonmetal because it is a noble gas .
hope this helped you ☺️
if a body covers a distance of 25m in a straight line in 5sec ,calculate the averge velocity of the body
Displacement (s)=25m
Time taken (t)=5 sec
Average Velocity (v)= ?
now,
v= d÷ t
v= 25m÷ 5
v= 5m/s
Answer:
[tex]displacement= 25m \\ time = 5 \: sec \\ avarage \: velocity = \frac{displacement}{time} \\ = \frac{25}{5} = 5 \frac{m}{sec} \\ thank \: you[/tex]
How long would it take a runner to go 5000 meters at a speed of 5 meters per second.
[tex]\\ \sf\longmapsto Speed=\dfrac{Distance}{Time}[/tex]
[tex]\\ \sf\longmapsto Time=\dfrac{Distance}{Speed}[/tex]
[tex]\\ \sf\longmapsto Time=\dfrac{5000}{5}[/tex]
[tex]\\ \sf\longmapsto Time=1000s[/tex]
en and Karen are travelling for the weekend. They both leave from Jen's house and meet at their destination 250 miles away. Jen drives 45mph the whole way. Karen drives 60mph but leaves a half hour after Jen. How long does it take for Karen to catch up with Jen
Answer:
1 1/2 hours. for Karen to catch Jen.
Explanation:
Karen needs to make up 22.5 km which is the distance Jen travels in 1/2 hour.
The distance where they meet must be equal from the starting point.
Jen
Jen is out 1/2 hour longer.
Let the Karen's time = t
d = r * t
d = 45 * (t + 1/2 hour)
Karen
d = 60 * t
The distances are equal
so
Meeting time
45*(t + 1/2 hour) = 60 * t
45t + 22.5 = 60t Subtract 45t from both sides
22.5 = 15t Divide by 15
t = 22.5 / 15
t = 1 1/2 hours = 1.5 hours.
Now you have to interpret the results.
Remember that Jen has travelled 1/2 hour more than Karen
Her time is 2 hours.
Karen's time is 1.5 hours.
Jen travels 2 hours which is 2 * 45 = 90 miles
Karen travels 1 1/2 hours which is 1.5 * 60 = 90 miles
a heat engine gives out 400J of heat energy as the useful work.calculate the energy given to it as input if its efficiency is 40%?
Answer:
E(efficiency) = E(out) / E(in)
.4 = 400 J / E (in)
E (in) = 1000 J
Heat input : 1000J
What is efficiency of a heat engine ?
The efficiency of a heat engine is defined as the ratio of work done by the heat engine absorbed per cycle.
Given : work output = 400 J
Efficiency = 40 % = 0.4
heat input = ?
Efficiency = work output / heat input
0.4 = 400/heat input
heat input : 1000J
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Any two waves that meet as they travel through the same medium will interact. If the two waves are in phase their crests will coincide and they will experience _____ interference, producing a wave with a(n) _____ amplitude.
Answer:
constructive
alpitude
what do you think the benefits of nuclear energy are
The benefits of nuclear energy should involve less energy cost, accurate, release zero emissions of carbon, cost-effective, etc.
The information related to nuclear energy is:
It is to used for nuclear reactions in order to generate electricity.Nuclear power could be received from nuclear fission, decay, and its reactions.The majority of electricity should be generated via nuclear fission of both uranium & plutonium for nuclear power plants.Therefore we can conclude that The benefits of nuclear energy should involve less energy cost, accuracy, release zero emissions of carbon, cost-effective, etc.
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A student drops a feather off the top a building. The feather averages 1.5m/s while
fluttering to the ground.
Determine all unknowns.
The acceleration with which an object falls through a fluid decreases as the speed of the object increases under gravity, to the point where the speed becomes constant, which is known as the terminal speed of the object
The unknown parameters are the mass of the feather, the density of the air, the feather's projected area and the coefficient of drag
The reason the above selected parameters are the correct unknowns is as follows;
The known parameter;
The speed of the feather the student drops off the building's top = 1.5 m/s
The required parameter;
The unknown parameters
Method;
Determine the terminal velocity parameters of the feather
The terminal velocity, [tex]\mathbf{V_t}[/tex], of an item is the maximum steady speed the item reaches as it falls through a fluid. The terminal velocity of the feather is given by the following equation
[tex]Terminal \ velocity, V_t = \mathbf{\sqrt{\dfrac{2 \cdot m \cdot g}{\rho \cdot A \cdot C_d} }}[/tex]
Where;
[tex]\mathbf{V_t}[/tex] = Terminal velocity = The constant speed of the feather
m = Mass of the feather
g = Gravitational acceleration
ρ = Air density
A = The feather's projected area
[tex]C_d[/tex] = Drag coefficient
The average speed of the feather = 1.5 m/s = The feathers typical or most common speed = The terminal velocity of the feather, [tex]\mathbf{V_t}[/tex];
Plugging in [tex]\mathbf{V_t}[/tex] = 1.5 m/s gives;
[tex]V_t = 1.5 \ m/s = \mathbf{\sqrt{\dfrac{2 \cdot m \cdot g}{\rho \cdot A \cdot C_d} }}[/tex]
Therefore, the unknown parameters with regard to the feather falling are the parameters that are to be specified, including;
The mass of the featherThe density of air at the locationThe feather's projected areaThe drag coefficientLearn more about terminal velocity here:
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what is displacement
Answer:
finding the volume of an irregular shape
what occurs at the end of a negative cell if an electric cell is placed in a closed circuit?
1. Current means flow of electrons and electrons are negative charged and so are attracted to the positive end of the battery and repelled by the negative end.
2. When battery is connected in a circuit that lets the electron flow through it, they flow from negative to positive.
3. When negative terminal of cell is connected to other negative terminal of the cell in a particular circuit then, current will not flow in circuit as electrons cannot flow from negative to negative terminal.
Critical Thinking If there is a difference
between a substance's atomic number and
its atomic mass, which measure must be the
larger number?
Which term describes the repeated arrangement of the same molecule? (1 point)
O molecular model
O atoms
O bonds
o extended structure
The term which best describes the repeated arrangement of the same molecule is: D. extended structure.
An atom can be defined as the smallest unit which comprises the matter that forms all chemical elements. Thus, atoms are typically the fundamental building blocks of matter and as such determines (defines) the structure of a chemical element.
Generally, atoms are typically made up of three (3) distinct particles and these are;
Protons.Neutrons.Electrons.In Chemistry, a molecule can be defined as a group of two or more atoms that are chemically bonded together by means of shared electrons and represents the smallest fundamental unit of a substance or chemical compound.
Basically, when the same molecule are arranged repeatedly it is typically referred to as an extended structure.
In conclusion, the term which best describes the repeated arrangement of the same molecule of a chemical compound or substance is an extended structure.
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What is the name given to a celestial object with a known brightness, used to establish distances in astronomy?
Schrodinger's cloud model for electrons is an alternate theory to Bohr's orbit model. True or False
Answer:
it's true...
Explanation:
hope it helps you
Activity log - Chest and Back Record your time and activity below and in your unit fitness log. If a particular category does not apply, leave it blank. Date: Warm-up: Cool-down: Type of Activity: (Cardiovascular, Muscular, or Flexibility) Description of Activity and Time: Intensity Level: (Moderate or Vigorous) Total Time:
Answer:
Muscular and vigorous
Explanation:
Big gains only
Answer:Date: 08/21/21
Warm-up: 5 minutes
Cool-down: 1 minute
Type of Activity: Muscular
Description of Activity and Time: push up, and repetitions 10 minutes
Intensity Level: Moderate
Total Time:16 minutes
Explanation:
A ball rolled at a speed of 3m/s for 2.5s. How far did it travel?
Answer:
7.5 m
Explanation:
speed = distance/time
=> speed × time = distance
=> (3 m/s) × (2.5 s) = distance
=> 7.5 m = distance
what colors are included in our visible spectrum?
ALL colors are in the visible spectrum.
"Color" is a word we use to describe light that our eyes can detect. If the light has a "color", that means we can see it, and somebody gave it a name. If we can't see it, then we don't have a "color" to describe it.
Every color that has ever been perceived by human eyes is present in the humanly-visible spectrum, except "black".
There are at least hundreds of them. Probably thousands. Maybe millions.
The Colours that are included in visible spectrum are - 7 Colours namely :
Red Orange yellowgreen blueindigovioletExplanation:
when white light passes through a prism , the violet light bends most and the red light bends the least.Dispersion of light is the phenomenon of splitting of white light into its constituent seven colours on passing through a glass prism.The band of seven Colours so obtained is called visible spectrum.The seven Colours of white light are Violet, indigo , blue, green , yellow, orange and red . It is remembered by the acronym - VIBGYOR.
What is the relationship between the number of resistors ,the effective resistance of the circuit and the total current in parallel
Answer:
As more and more resistors are added in parallel to a circuit, the equivalent resistance of the circuit decreases and the total current of the circuit increases. Adding more resistors in parallel is equivalent to providing more branches through which charge can flow.
what is the value of acdeleration due to gravity on the surface of the moon and on the surface of the eatrh
Answer:
Explanation:
moon is 1.6metre per second and earth is 9.8 meters per second square
Have a nice day bye
Physical Science Essential Question: How can the scientific process be used to help us investigate and understand natural phenomena? Elaborate: Challenge students to pretend they are on the scientific journey to develop a vaccine to stop the zombie apocalypse and they need to design an experiment as a result of working in a laboratory. Ask the students to write 2-3 paragraphs describing what they would test and why might this be important in science and the real world. They might need to include the following terms: Experimental design
Test variable
•Outcome
•Control variable
•Hypothesis
•Testable
•Graphs and charts
Answer:
It C 100% bc i alrweady learn this
Is the earth flat or round or a donut?
What is Measurement?
Answer:
Measurement is a comparison of an unknown quantity with a known fixed quantity of the same kind. The value obtained on measuring a quantity is called its magnitude. Magnitude of a quantity is expressed as numbers in its units.Explanation:
measurement is necessary to express the amount or rate of any physical quantity
Help would be very appreciated :)
Answer:
c. is the answer i think
Explanation:
Answer:
d. is the the naswer I'm sure with it and not much sure but it would be ryt option