Michelson-Morley experiment helped present-day scientists by explaining how light travels through space and time.
What is an Experiment?This is referred to as a procedure which is carried out by scientists in other support or refute a hypothesis and an example of such is the Michelson-Morley experiment which helped explain some properties of light.
This experiment was able to explain how light travels in different media and the velocity in which such occurs. It was also discovered that light has a constant speed of light which helped to establish different mathematical relationships between various parameters and helped present-day scientists discover more.
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The frame of reference for an outside observer of a moving
bus might be a house across the street.
-TRUE
-FALSE
Answer:
false
Explanation:
when two resistors are wired in series with a 12 v battery, the current through the battery is 0.31 a. when they are wired in parallel with the same battery, the current is 1.60 a.
R₁ = 28. 535 v and R₂ 10.125 Ω are the resistance are wired in series with a battery.
Let R₁ and R₂ be the two Resistance
resistance - which resists the flow of current.
R₁ - Resistance of 1st resistor
R₂ - Resistance of 2nd resistor
V = Voltage = 12V
I = O.31A ( in series)
I = 1.6 A ( in parallel)
when two resistance connected in series then
Rs = R₁ + R₂
V = IRs = 12 /0.31 V
R₁+R₂ = 38.700Ω (equation1.)
When two resistance connected in parallel then the value of R is.
[tex]R_{p} =\frac { R_{1} R_{2}}{R_{1} + R_{2} }[/tex]
V = I Rp
V= I (R₂ R₁ /R₁ +R₂)
R₁ R₂ = 290.25 Ω
As we know
(R₁ - R₂ ) ² = (R₁ + R₂ ) ² - 4R1R2
Using above values we get,
(R₁ - R₂ ) ² = (38.70) ² - 4x 290.25
(R₁ - R₂ ) ² = 336.69 Ω
R₁ - R₂ = 18.34 (equation 2 )
Using equation 1 and 2 we get
R₁+ R₂ = 38.70 52
R₁ - R₂ = 18.34
R₁ = 28.535 Ω
Using the value of R₁ in equation 1 we get
R₂ = 38·700 - 28.535
R₂ = 10.125 Ω
R₁ = 28. 535 v and R₂ 10.125 Ω are the resistors are wired in series with a battery.
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Conclusion When there is a constant unbalanced force applied in the same direction as the motion, speed will ___________________ and acceleration will _____________________________. When there is an increasing unbalanced force applied in the same direction as the motion, speed will ___________________ and acceleration will ________________________. When there is a constant unbalanced force applied in the opposite direction as the motion, speed will ___________________ and acceleration will ________________________. When there is an increasing unbalanced force applied in the opposite direction as the motion, speed will ___________________ and acceleration will ________________________.
Explanation:
When there is a constant unbalanced force applied in the same direction as the motion, speed will increase and acceleration will remain constant. When there is an increasing unbalanced force applied in the same direction as the motion, speed will increase and acceleration will increase.
According to newton's 2nd law
F = ma
F ∝ a
meaning when F increases , a increases and vice versa
A person with body resistance between his hands of accidentally grasps the terminals of a 14-kV power supply. (a) If the internal resistance of the power supply is what is the current through the person’s body? (b) What is the power dissipated in his body? (c) If the power supply is to be made safe by increasing its internal resistance, what should the internal resistance be for the maximum current in the above situation to be 1.00 mA or less?
A person who unintentionally grabs the terminals of a 14-kV power supply while holding body resistance between his palms.
(A) What is the current flowing through the person's body if the power supply's internal resistance is?
(b) Where does his body's power go when it is dispersed?
(c) If the power supply's internal resistance is to be increased in order to make it safer, what internal resistance should it have for the maximum current in the aforementioned scenario to be 1.00 mA or less?
employing ohm's law
a) The equation V = IR, where V is the voltage in volts, I is the current in amperes, and R is the resistance in ohms
R = V / I = 1.50 V/ ( 2.05 /1000) A = 731.71 ohms
b) E = IR + Ir = (731.71 0.0036) Power = IV = v = = = 0.1107 W
Ohm's regulation states that the cutting-edge through a conductor between two factors is without delay proportional to the voltage across the two factors. Introducing the steady of proportionality, the resistance, one arrives at the usual mathematical equation that describes this relationship:
The regulation became named after the German physicist Georg Ohm, who, in a treatise posted in 1827, described measurements of applied voltage and current thru easy electrical circuits containing various lengths of wire.
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Please help me will mark u brainiest
Answer:
Answer: B. 12 N
Explanation:
Static Equilibrium
Static equilibrium occurs when an object is at rest, i.e., neither rotating nor translating.
In the static rotational equilibrium, the total torque is zero with respect to any rotational axis.
The torque applied by a force F perpendicular to a displacement X with respect to a reference rotating point is:
T = F*X
Considering the pivot as the rotating point, there are 3 forces producing torque. Let's consider counterclockwise torques as positive, thus:
30N * 40 cm - 60 N * 30 cm + F (30 cm + 20 cm) = 0
Operating:
1200 N.cm - 1800 N.cm + F(50 cm) = 0
- 600 N.cm + F(50 cm) = 0
Solving for F:
F = 600/50
F = 12 N
Answer: B. 12 N
Ninety percent of research animals are __________. a. dogs b. rats and mice c. primates d. rabbits please select the best answer from the choices provided a b c d
Answer: rats and mice
Explanation: because they are small and easy and more ethical
Answer:
B. Rats and mice
Explanation:
They use rodents more as a test subject, so the answer would be B. Rats and Mice.
I hope it helps! Have a great day!
The energy transferred between objects in contact as of temperature difference is called what?
Answer:
Heat
Explanation:
Answer:
Heat conduction, also called diffusion, is the direct microscopic exchange of kinetic energy of particles through the boundary between two systems.
Explanation:
Cumulative Exam
Cumulative Exam Review
Active
2
Which best compares concave and plane mirrors?
Plane mirrors produce only virtual images, and concave mirr
Plane mirrors produce only real images, and concave mirror
Concave mirrors produce only real images, and convex mirro
Answer:
Explanation:
Hi! It would be A. Plane mirrors produce only virtual images,and concave mirrors produce real and virtual images.
Plane mirrors construct only virtual images, and concave mirrors make real and virtual images. Thus, this statement best corresponds concave and plane mirrors.
What are virtual images?A virtual image exists represented as the opposite of a real image, thus an image that cannot be obtained on a screen stands produced as a virtual image. The motivation for this exists in the fact that the beams of light that form a virtual image never connect therefore a virtual picture can never be projected onto a screen. Examples: Image formed in a plane mirror, an image constructed on the front and back surfaces of a spoon, etc.
Therefore, the (A) option exists as the accurate answer.
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Which forms of heat transfer do not require matter(particles) to happen? (Select all that apply)
Conduction
Convection
Radiation
None of these
Answer:
Radiation
Explanation:
bc Radiation transfers heat through electromagnetic waves.
A car starts from rest and accelerates to a speed of 30 m/s in 20 seconds, what is its acceleration
The acceleration of a car that starts from rest and accelerates to a speed of 30 m/s in 20 seconds is 1.5 m/s².
What is the acceleration of the car?Acceleration is defined as the change in velocity of a body or an object with time.
Mathematically;
Acceleration = change in velocity/time takenThe acceleration of the car is calculated using the equation of motion as follows:
v = u + a * t
where;
v is the final velocity
u is the initial velocity
t is the time taken
a is the acceleration
From the dat provided: v = 30 m/s, t = 20 s, u = O m/s
a = v - u/t
a = 30 - 0/20
a = 1.5 m/s²
Therefore, the acceleration of the car that starts from rest and accelerates to a speed of 30 m/s in 20 seconds, is 1.5 m/s².
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A solid block of volume 6.0m^3 is placed under water whose density is 1000 kgm^3 (g=10Nkg^1)
a) what volume of water does the block displace?
b) What mass of water does the block displace?
c) what is the weight of the displaced Water?
d) How large is the upthrust which acts on the block ?
e) What will happen if the block is made ofwood of density 700kgm^3?
f) What will happen if the block is made of rock of density 3000kgm^3?
Can you please answer theese two qeastion
Answer:
C.
Explanation:
kase anjan na yung sagot ohh
A soccer ball is kicked 7 meters west and then 3 meters east.
What is the DISTANCE?
What is the DISPLACEMENT?
Answer:
4 meters............
.
.
.
.
.
describe Newton's law of gravitation and its application?
Answer:
Newton's law of gravitation states that every object in this universe attracts every other object with a force called gravity,
when the distance between the two object is increased the gravitational force decreases by its square,
and when the mass an object increases the gravitational force also increases,
therefore, gravitational force is directly proportional to the mass of the two objects and is square inversely proportional to distance between them.
Hope it helped u,
pls mark as the brainliest and put thanks
^_^
Question 4 (1 point)
Select all of the BENEFITS of a SERIES circuit.
It uses more wire than a parallel circuit.
It is simple and cost effective to build.
The bulbs will stay on when one bulb breaks or burns out.
You will always know when there is a break in the circuit.
Answer:
D and C
Explanation:
C. The bulbs will stay on when one bulb breaks or burns out.
D. You will always know when there is a break in the circuit.
BENEFITS of a SERIES circuit:
Easy to design and build the circuit. If a component breaks, the current flow stops. It acts as a current regulator. The cost to build a Series Circuit is less compared to Parallel Circuit.Cells are connected in series give a greater resultant voltage than individual cells. Voltage increases if the number of cells increases. Series circuits do not overheat easily.The bulbs will stay on when one bulb breaks or burns out. You will always know when there is a break in the circuit.Therefore, option C and D are correct.
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Below is a list of organisms and their tolerance to pollution. Which organism(s) would you expect to be remaining after the stream they lived in was polluted with man-made waste? Select all that apply.
Answer:
Black Flies, leeches and aquatic worms.
Explanation:
Black Flies, leeches and aquatic worms are the organisms that are tolerant to pollution and has the ability to survive in the polluted environment occur due to man-made waste. these organisms sometimes takes food from these pollutants and help in surviving these organisms. Without these tolerant organisms, those organisms which are not sensitive to these pollutants will die and removed from that polluted environment.
A company claims to have built a perpetual motion device, which stays in motion without any energy input. Which statement best
summarizes the company's claim.
Answer:
It's Compleatly False
Explanation:
It would violate the first law of thermodynamics which states that energy cannot be created or destroyed, and these laws are not optional. Furthermore, A perpetual motion machine would have to produce work without energy input. The Second Law of Thermodynamics states that that an isolated system will move toward a state of disorder.
a copper wire that is 1 mm thick and 30 cm long is connected to a 1 v battery. (the resistivity of copper is 1.69 x 10-8 ω⋅m.)
A copper wire that is 1 mm thick and 30 cm long is connected to a 1 v battery. (the resistivity of copper is 1.69 x 10-8 ω⋅m). The power is 154.82 W.
As we know the formula of Power:
P = V²/R ......(i)
Where,
P = power dissipated, V = voltage R = resistance
Now,
R = Lρ/A .....(ii)
Where,
L = length of the wire, A = cross-sectional area, ρ = resistivity of the wire.
From eq (i) and eq(ii),
P = V²/(Lρ/A)
P = AV²/Lρ........ (iiI)
Here,
A = πd²/4, Where d = 1 mm
A = (3.14×0.001²/4) = 7.85×10⁻⁷ m²
Putting the value of A and the given values from the question in equation (iii).
P = (7.85×10⁻⁷×1²)/(0.3×1.69 x 10⁻⁸)
P = 154.82 W
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pls solve this numerical.
Answer:
[tex]{ \rm{A .B = |A| |B| \sin( \theta) }} \\ { \rm{A.B = 5 \times 7 \times \sin(45) }} \\ { \rm{A.B = 35 \times \frac{1}{ \sqrt{2} } }} \\ \\ { \rm{A.B = \frac{35}{ \sqrt{2} } }}[/tex]
rationalise the denominator;
[tex]{ \rm{A.B = \frac{35}{ \sqrt{2} } \times \frac{ \sqrt{2} }{ \sqrt{2} } }} \\ \\ { \rm{A.B = \frac{35 \sqrt{2} }{2} }}[/tex]
Switch on your light source. Make sure it is shining onto a wall. Hold your largest plastic shopping bag square between the light source and the wall. What do you observe?
Since the plastic is not very thick, light rays can penetrate through when I hold my largest cardboard square between the light source and the wall. As a result, the cardboard tends to cast a shadow.
Based on the precise materials and light sources that were employed, the results of the cardboard experiment frequently differ.
Keep in mind that it is generally expected that reflective materials, such aluminum foil and mirrors, would reflect the specified or given light.
Since the plastic is not very thick, light rays do penetrate when I hold my largest cardboard square between the light source and the wall. As a result, the cardboard tends to cast a shadow when held in this position.
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Which units are used to express sound intensity?
Answer: decibels
Explanation:
The tensile stress in a thick copper bar is 99.5 % of its elastic breaking point of 13.0× 10¹⁰ N/m² . If a 500-Hz sound wave is transmitted through the material, (c) What is the sound intensity in the bar?
Here the sound intensity in the bar is 4.73×10⁹ W/m².
What do you mean by sound intensity?The power carried by sound waves per unit area in a direction perpendicular to that region is known as sound intensity or acoustic intensity. The watt per square meter (W/m²) is the SI unit of intensity, which also covers sound intensity. One use for this technology is to measure the amount of sound energy present in the air near a listener.
According to the question:
The sound intensity in the bar, I = 1/2 ρω²s²v
I = 1/2 (8.92×10³)(2π×500)²(4.63×10⁻³)²(5010)
I = 4.73×10⁹ W/m².
Hence, the sound intensity in the bar is 4.73×10⁹ W/m².
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A hiker is traveling through the woods. He first travels east 125 m and then turns and travels 36 m north . What his his resultant displacement. Make sure you include magnitude , direction , and angle.
Answer:
can you put it in a sentence
Which genus of single-celled organisms feeds by surrounding its food with cytoplasm and engulfing it?
A.Euglena
B.Volvox
C.Amoeba
D.Paramecium
Answer:b
Explanation:
b
an electric dipole is located at the origin consists of two equal and opposite charges located at <-0.01, 0, 0>m and <0.01, 0 ,0 >m. the electric field at <0,1,0>m has a magnitude of 1 n/c. what is the approximate magnitude of the electric field at <0,2,0>m
The approximate magnitude of the electric field at <0,2,0>m is 0.
What is magnitude?Size alludes to the reviewing of the splendor of stars, the first being the most splendid. It has been moved to different issues since essentially the seventeenth hundred years. A size is the estimation or outright worth of an amount. A size is addressed by a positive genuine number. In Physics, greatness is characterized as the most extreme degree of size and the course of an article. Greatness is utilized as a typical calculate vector and scalar amounts. By definition, we realize that scalar amounts are those amounts that have size as it were.
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help me
1. A girl drops her new I-phone in the parking garage at First Colony Mall off a 22m ledge.
How fast is her phone moving just before racking into pieces?
2. An AHS football player throws a soccer ball straight up at 4m/s. How long does it take
for it to come back to their hand?
3. Batman throws a Batarang 31 m/s into the air. How high does it go?
4. A rock falls off a cliff for 0.004 hours, how high was the cliff?
5. An object is thrown into the air going 11 m/s. How fast is it going 2 seconds later?
1. The phone is moving with a velocity of 20.77 m/s before racking into pieces
2. The time taken for the ball to come back to their hand is 0.82 s
3. The maximum height reached by the batarang is 49.03 m
4. The cliff is 1016.06 m high
5. The object is moving with a velocity of –8.6 m/s after 2 s
1. How to determine the velocityInitial velocity (u) = 0 m/sAcceleration due to gravity (g) = 9.8 m/s²Maximum height (h) = 22 mFinal velocity (v) = ?v² = u² + 2gh
v² = 0² + (2 × 9.8 × 22)
v² = 431.2
Take the square root of both side
v = √431.2
v = 20.77 m/s
2. How to determine the time taken for the ball to come backWe'll begin obtaining the time taken to reach the maximum height. This is illustrated below:
Initial velocity (u) = 4 m/sFinal velocity (v) = 0 m/s (at maximum height) Acceleration due to gravity (g) = 9.8 m/s²Time to reach maximum height (t) =?v = u – gt (since the ball is going against gravity)
0 = 4 – (9.8 × t)
0 = 4 – 9.8t
Collect like terms
0 – 4 = –9.8t
–4 = –9.8t
Divide both side by –9.8
t = –4 / –9.8
t = 0.41 s
Finally, we shall determine the time for the entire trip
Time to reach maximum height (t) = 0.41 sTime for the entire trip (T) =?T = 2t
T = 2 × 0.41
T = 0.82 s
3. How to determine the maximum height Initial velocity (u) = 31 m/sFinal velocity (v) = 0 m/s (at maximum height) Acceleration due to gravity (g) = 9.8 m/s²Maximum height (h) =?v² = u² – 2gh (since the ball is going against gravity)
0² = 31² – (2 × 9.8 × h)
0 = 961 – 19.6h
Collect like terms
0 – 961 = –19.6h
–961 = –19.6h
Divide both side by –19.6
h = –961 / –19.6
h = 49.03 m
4. How to determine the height of the cliffAcceleration due to gravity (g) = 9.8 m/s²Time (t) = 0.004 h = 0.004 × 60 × 60 = 14.4 s Height (h) =?h = ½gt²
h = ½ × 9.8 × 14.4²
h = 4.9 × 207.36
h = 1016.06 m
5. How to determine the velocityInitial velocity (u) = 11 m/sAcceleration due to gravity (g) = 9.8 m/s²Time (t) = 2 sFinal velocity (v) = ?v = u – gt (since the ball is going against gravity)
v = 11 – (9.8 × 2)
v = 11 – 19.6
v = –8.6 m/s
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how elements are arranged in the groups of periodic table
if you lift weights faster than normal you have increased what?
A work
B force
C power
D distance
The accompanying table shows measurements of the Hall voltage and corresponding magnetic field for a probe used to measure magnetic fields. (a) Plot these data and deduce a relationship between the two variables.
The value of [tex]V_{H}[/tex] is[tex](1.00\times10^{-4} V/T)B[/tex].
What is a magnetic field?
The magnetic influence on moving electric charges, electric currents, and magnetic materials is described by a magnetic field, which is a vector field. A force perpendicular to the magnetic field and its own velocity acts on a moving charge in a magnetic field. The magnetic field of a permanent magnet pulls on ferromagnetic substances like iron and attracts or repels other magnets. A magnetic field that varies with location will also exert a force on a variety of non-magnetic materials by changing the velocity of those particles' outer electrons. Electric currents, like those utilized in electromagnets, and electric fields that change in time produce magnetic fields that surround magnetized things. Since a magnetic field's position can affect both its strength and its direction.
By using the trend line option in excel, we get
[tex]\Delta V_{H} (in\mu V) = 100B[/tex]
[tex]\Delta V_{H} (V)= (\frac{100} {10^{-6} } V/T)B[/tex]
=[tex](1.00\times10^{-4} V/T)B[/tex]
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Review. A metal rod of mass m carrying a current I glides on two horizontal rails a distance d apart. If the coefficient of kinetic friction between the rod and rails isμ , what vertical magnetic field is required to keep the rod moving at a constant speed?
The vertical magnetic field required to keep the rod moving at a constant speed is IBd=[tex](u_{k} )[/tex]mg.
What is magnetic field?
When describing the distribution of the magnetic force in the area surrounding and inside of a magnetic object, we use the metaphor of a magnetic field.
The most of us are somewhat familiar with common magnetic items and are aware that there may be forces present between them. We know that magnets have two poles, and that two magnets can be attracted (opposite poles) or repellent depending on how they are oriented (similar poles). We understand that this occurs in some area that surrounds a magnet. Described by the magnetic field, this area.
Mathematics uses a vector field to represent the magnetic field. An array of several vectors drawn on a grid can be used to directly plot this vector field.
Explanation:
Given mass of rod ,m
current carrying= I
Separation between rails =d
The kinetic friction coefficient, uk
The force of magnetic field (F) is perp. to the magnetic field.
Let required magnetic field be B.
Now balancing forces in y-direction,
N=mg
And. in x-direction,
F=f
IBd= [tex]u_{k}[/tex]N
IBd=[tex](u_{k} )[/tex]mg
B=[tex]\frac{u_{k} mg}{Id}[/tex]
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