Answer: 6 trillion miles
Explanation: 1 light-year = 6 trillion miles
Waves that collide with a barrier will reflect at an angle equal to the angle of incidence.
True
False
Answer:
True
Explanation:
This is a fundamental concept in physics dealing with the nature of waves where when the waves collide with a barrier such as wall or some form of surface will reflect at an angle equal to the angle of incidence.
Why is this equation wrong?
Answer:
It is not possible to find the square root in such a way
Explanation:
What is the mechanical advantage of the simple machine pictured?
A. 8.3
B. 14.7
C. 1.9
D. 20.4
Answer:
[tex]D.\ 20.4[/tex]
Explanation:
The simple machine in the attachment is a screw; so, I'll list the given parameters using related terms
Given
Radius of the screw (r) = 2.6m
Pitch (P) = 0.8m
Required
Calculate the Mechanical Advantage (M.A)
M.A is calculated as thus;
[tex]MA = \frac{2\pi r}{P}[/tex]
Substitute 2.6 for r; 0.8 for P and 3.14 for [tex]\pi[/tex]
[tex]MA = \frac{2\pi r}{P}[/tex]
[tex]MA = \frac{2 * 3..14 * 2.6}{0.8}[/tex]
[tex]MA = \frac{16.328}{0.8}[/tex]
[tex]M.A = 20.41[/tex]
From the list of given options, the approximated answer is D. 20.4
What happens to the gravitational force between two objects as the distance between them decreases?
Answer:
gravitational force increases
Explanation:
Since gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces. So as two objects are brought closer to each other, the force of gravitational attraction between them also increases.
This is an example of A) alpha decay B) beta decay C) gamma decay D) half-life decay
Answer:
The answer is option A.
alpha decay
Hope this helps
PLS ANSWER (SCIENCE QUESTION) I WILL MARK U AS THE BRAINLIEST!!! PLS ANSWER REALLY EASY!!
Q1. Fill in the blanks:
1. __________________ are the building blocks of matter.
2. Each ________________ has a chemical symbol.
3. ________________ is used in oxy- acetylene flame for welding.
4. Noble gasses are also called __________________.
5. Dimitri Ivanovich Medeleeve arranged the elements systematically in _______________
6. Elements are the simplest kind of __.
7. Metals have __ melting and boiling points.
8. As you move from the left side of the periodic table to the right side, the elements become __________ .
Answer:
1. Atoms
2. element
____________ interference occurs when two waves are out of phase
[tex]\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}[/tex]
Actually Welcome to the Concept of the Wave Optics.
Whenever the waves are out of phase they form a DESTRUCTIVE interference.
thus,
Destructive Interference occurs when two waves are out of phase.
Given the resistivities below, which material is best described as an insulator?
A. 4.5 22•m
B. 2.8 x 10-8
12.m
C. 1.7 x 10-8 2•m
D. 3.2 x 108 2.m
Answer: D) 3.2 × 10^8
Explanation: Insulators are best described as materials which are poor conductors of electricity and hence do not allow passage of electricity through them. Resistivity are hence used to describe property or characteristic of a material which does not allow the flow or passage of electric current.
In summary, materials which high resistivity values are referred to as Insulators. Conversely, those with low resistivity or high conductivity values are called conductors while those with intermediate values are named semiconductors.
In the question given above, the material with a resistivity value of 3.2 × 10^8 - - - has a very high resistivity value (320000000Ω), the other options given have very low resistivity values ; 0.0000000017, etc and are most likely to be conductors due to their excessively low resistivity values.
A 24.8 tall object is placed in front of a lens, which creates a -3.09 cm tall image. What is the magnification?
Answer: 0.125
Explanation:
Given that the
Object height U = 24.8 cm
Image height V = 3.09 cm
Magnification M is the ratio of the image height to the object height. That is, divide the given image height by the given object height.
M = V/U
Substitute V and U into the formula above.
M = 3.09/24.8
M = 0.125
Magnification is therefore equal to 0.125 approximately
Answer:
-0.125.
Explanation:
The previous explanation is right except for that it doesn't take into account that the -3.09 is negative – therefore, the positive answer is incorrect.
-0.125 is correct on Acellus.
A box having a mass of 0.2 kg is dragged across a horizontal floor by
means of a rope tied on the front of it. The coefficient of sliding friction
between the box and the floor is 0.2. If the angle between the rope and
the floor is 15º, what force must be exerted on the rope to move the box
at constant speed.
you can check attachment for answer.
kind regards
A force of 0.385 N must be exerted on the rope to move the box at a constant speed.
What is kinetic friction?Kinetic friction can be explained as a force that applies between moving surfaces of objects. A body moving on the surface will experience a force in the opposite direction. The friction force will depend on the coefficient of kinetic friction between the two bodies.
The mathematical expression of the kinetic friction can be represented as:
F = μ N
where 'μ' represents the coefficient of Kinetic friction.
Given, the mass of the box, m = 0.2 Kg
The coefficient of friction, μ = 0.2
The angle, θ = 15°
From the second law of motion:
F = ma
Fcosθ - f = 0
Fcosθ = μ N
[tex]\displaystyle F =\frac{\mu mg}{cos\theta + \mu sin\theta}[/tex]
[tex]\displaystyle F =\frac{0.2\times 0.2\times 9.8}{cos15 + 0.2 sin15}[/tex]
F = 0.385 N
Therefore, the force exerted is equal to 0.385 N.
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Describe the extent of the swing !
Answer:Definition of swing it. informal. : to do or manage something successfully If he can swing it, he'll visit next
The diagram illustrates the evolution of the universe, starting from the big bang. Each concentric circle represents a stage in the evolution as stated by the big bang theory. The arrows illustrate the changes that happened after the big bang and leading up to the stage where gases were formed that later led to the formation of stars and galaxies. Choose the inaccurate statements on the diagram.
Answer: The two correct answers are Universe became more dense and universe became less transparent.
Explanation: I took the test and those are correct
The incorrect statements on the diagram universe became more dense Universe became less transparent.
What is the universe?The universe is the whole cosmic system of matter and energy. The Earth, the Sun, the Moon, the planets, and the stars along with the dust, gases, and rocks form the universe.
The big bang is the theory that explains how the universe began. It says that the universe began with just a single point. It went on expanding and stretched to grow as large as possible. It is still now expanding.
The diagram (attached) illustrates the evolution of the universe, starting from the big bang. Each concentric circle represents a stage in the evolution as stated by the big bang theory.
Thus, the inaccurate statements on the diagram universe became more dense Universe became less transparent.
Learn more about the universe.
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when taking a shower are girls suppose to wipe front to back ?
Answer:
Explanation:
I don't think it matters while taking a shower, however, while using the restroom, it is especially encourgaed to wipe front to back. The reasoning behind this is to prevent UTI's that are transferred by fecal particles and bacteria from the anus into the vagina. Hope this helps:)
How many electrons do carbon and oxygen share
Answer:
1
Explanation:
To satisfy the Octet Rule, Carbon needs 4 more valence electrons. Since each Oxygen atom has 3 lone pairs of electrons, they can each share 1 pair of electrons with Carbon; as a result, filling Carbon's outer valence shell
Answer:
The Answer Is 4!!
Explanation:
Hope This Helps:)))
How is an ammeter connected to a circuit?
Answer:
Ammeter- It is an instrument use to measure the amount of current passing through the circuit.
In a circuit an Am-meter is connected in series with the device to measure its current.
What is the slope of the line plotted below?
A. 1
B. -2
C. 2
D.-1
Answer:
B. -2
Explanation:
Since the line is coming from the top left to the bottom right, you know the line is going to be negative.
If you take two points, so (0,1) and (1,-1), and use the formula y2-y1/x2-x1, after substitution you should get -1-1/1-0. If you simplify, the answer should be -2/1 or -2.
Compute the conductivity of a conductor with a length of 2.0 cm and a cross-sectional area of 0.060 cm2, whose conductance is 3.5 x 103 ohms. σ = _____ ohm-1cm-1 A: 1.2 x 10 5 B: 2.9 x 10 -4 C: 1.1 x 10 2 D: 1.9 x 10 6
Answer: A
Explanation:
You are given the following parameters:
Length L = 2.0 cm and
cross-sectional area A = 0.060 cm^2
Conductance = 3.5×10^3 ohms
Conductance is a reciprocal of resistance R
Conductance = (σ × A)/L
Where σ = conductivity
Substitutes all the parameters into the formula
3.5×10^3 = (0.06 × σ)/2
Cross multiply
7×10^3 = 0.06σ
Make σ the subject of formula
σ = 7000/0.06
σ = 116666.67 ohm-1cm-1
σ = 1.2 ×10^5 ohm-1cm-1 approximately
Answer:
1.2 ×10^5
Explanation:
Which of the following is a personal decision that involves science A)It is immoral to cheat on your homework? B)what movie will I like the most this weekend? C)will an air purifier reduce the dust in my house? D)is $100 a reasonable price for a cell phone?
Answer:
C because air purifier is very essential in dusty homes .
Answer:C
Explanation: The answer is C because an air purifier purifies the air in your room which is science.
What type of quantity is momentum?
It is a scalar quantity because it involves magnitude only.
It is a vector quantity because it involves magnitude only.
It is a scalar quantity because it involves magnitude and direction.
It is a vector quantity because it involves magnitude and direction.
Answer: It is a vector quantity because it involves magnitude and direction.
Explanation:
momentum has magnitude and direction
Magnitude is a Scalar quantity
direction is a vector quantity
scalar times a vector is a vector
The type of quantity momentum has is that of a vector and it is denoted as option D.
What is a Vector quantity?
This is the type of quantity which has magnitude and direction present in it and momentum has the both.
The formula is mass × velocity in which velocity is a vector quantity which makes it that too.
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Please answer this question
Answer:
Volume of the tank = 3m³
Mass of total water = 3,000 kg
Explanation:
Given:
Measurement of tank = 2m × 1.5m × 1m
Density = 1,000 kg/m³
Find:
Volume of the tank.
Mass of total water.
Computation:
⇒ Volume of the tank = lbh
Volume of the tank = 2m × 1.5m × 1m
Volume of the tank = 3m³
⇒ Mass of total water = Volume of the tank × 1,000 kg/m³
Mass of total water = 3m³ × 1,000 kg/m³
Mass of total water = 3,000 kg
Answer:
length x width x height = volume
2 x 1.5 x 1 = 3m
3m^3 is the volume
1000 km/ m^3 x 3m^3 = 3000^3 km
Hope this helps
Explanation:
Which of the following is an example of heat convection?
Answer:
Liquid inside a beaker on a hot Bunsen burner circulates and heats through constant motion.
Explanation:
Transmission of heat by convection requires the movement of a liquid or gas. An example would be liquid in a beaker heating up as hot and cold parts of the liquid constantly circulate, which further heats the liquid. Heat from the sun is considered radiation, and the other two answers are examples of conduction.
The degree to which a liquid resists flowing is called _____.
Answer:
Viscosity is a measure of how much a liquid resists flowing freely.
Answer:
velosity is the anser
Explanation:
sorry for the spelling
what are AR,L,K in the periodic table
Answer:
Argon, Lithium and Potassium
Explanation:
Answer:
AR=Argon, L=Lithium K=Potassiaum
Explanation:
The general kinematic equations of motion for vertical displacement can also be simplified significantly. Write the simplified
equation for y in this case. Explain how you have been able to simplify it from this general displacement equation:
Answer:
Δy = v₀t + (1/2)gt²
where g = 9.81 m/s if the body is moving downwards and g = -9.81 m/s if the body is moving upwards
Explanation:
The general kinematic equation for horizontal displacement is gives as:
Δx = v₀t + (1/2)at²
Where
Δx = change in the x direction
v₀ = initial velocity
t = time
a = acceleration
If the body is vertically instead of horizontally, Δx is changed to Δy
Δy = v₀t + (1/2)at²
For a vertical moving body, the acceleration it experiences is the gravitational accerelation of the earth 'g'
So the equation becomes:
Δy = v₀t + (1/2)gt²
where g = 9.81 m/s if the body is moving downwards and g = -9.81 m/s if the body is moving upwards
The general kinematic equations of motion for vertical displacement is written as [tex]h = v_0_yt - \frac{1}{2} gt^2[/tex].
The general kinematic equations of motion for vertical displacement is written as follows;
[tex]h = v_0_yt - \frac{1}{2} gt^2[/tex]
where;
h is the vertical displacement of the object[tex]v_0_y[/tex] is the initial vertical velocity of the objectg is the acceleration due to gravityt is the time of motion of the objectThus, the general kinematic equations of motion for vertical displacement is written as [tex]h = v_0_yt - \frac{1}{2} gt^2[/tex].
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Plz Help me with this ?
Answer:
the answer is c part.
Explanation:
hope it helps.
Answer:
The answer is C How many times the heart beats in one minute.
What is the resultant force?
8 NA
14 N
3N
3N
22 N
Answer:
option will be ''B'' 0N
Explanation:
There are two forces acting upward 8N and 14N which is equal to 22N(upward force)
since, 22N is also acting downwards
both the forces will cancel each other and the the outcome will be zero.
Now, there is a 3N force acting on the left and right. So, they too, will cancel each other and the result will be zero.
In simple words, the box won't move in any direction Since it's being pulled with equal strength from all sides.
hope this helps
A car has a mass of 8000 kg and a kinetic energy of 24,000 J. What is its
speed?
A. 1.7 m/s
B. 2.4 m/s
C. 6 m/s
D. 3 m/s
Answer:
2.4
Explanation:
48,000/8000=6
square root of 6 = 2.44948974278
so 2.4
AnswerB.2.4m/s
Explanations;
24000=1/2×8000×v^2
24000/4000=v^2
√ 6.=v
v=2.4
Mary is allergic to cats. Mary's friend, Sue, has a roommate who has cats. Whenever Mary visits Sue, Mary sneezes even before she enters Sue's house. Mary's sneezing persists even after Sue's roommate and his cats have moved out. After a while, Mary stops sneezing before she enters Sue's house. The point at which Mary's sneezing stopped is an example of _____.
Answer: Extinction
Explanation: Extinction simply means cessation. A condition whereby an action or behavior exhibited by an individual or organism eventually stops. In psychological parlance, extinction is usually attributed to the discontinuance of a certain behavior usually due to non - reinforcement or eventual absence of the conditioned stimulus.
In the scenario above, the point at which Mary stopped sneezing is called extinction which is due to the removal of the cat which is the cause of Mary's sneezing behavior.
Which method is used to separate parts of a solution when the entire solution can pass through a filter?
Answer:
Straining method
Explanation:
Straining method is the method that can be used to separate parts of a liquid mixture when the entire mixture can pass through a filter.
An overhead projector lens is 32.0 cm from a slide (the object) and has a focal length of 30.1 cm. What is the magnification of the image? (Unit=cm) PLS HELP
Answer: M = 14.3
Explanation:
Given the following :
Object distance (u) = 32cm
Focal length (f) = 30.1 cm
Magnification = image distance (v) / object distance (u)
Recall ; 1/f = 1/u + 1/v
1/30.1 = 1/32 + 1/v
1/v = 1/30.1 - 1/32
1/v = (32 - 30.1) / 963.2
1/v = 2.1 / 963.2
1/v = 0.0021802
v = 1/0.0021802
v = 458.66666 cm
Therefore, Magnification 'M' = v / u
M = 458.66666 / 32
M = 14.333333
M = 14.3
Answer:
M = -15.8
Explanation:
object distance = 32cm
focal length = 30.1 cm
To find M we first need to find di or image distance
I will use the equation: 1/f = 1/di + 1/do
By changing the equation to 1/f - 1/di = 1/do we get 0.0019725
equation with numbers plugged in:
1/30.1 - (1/32) = 0.0019725
To change 1/do to do we divide 1 by 0.0019725
You should get 506.97
Now use the equation
M = -(di/do)
M = -(506.97/32)
You should get M = -15.8