[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
Wavelength, Wavespeed and frequency depends on each other in the following way :
[tex]\qquad \sf \dashrightarrow \: frequency = \dfrac{wave \: \: velocity}{wavelength} [/tex]
[tex]\qquad \sf \dashrightarrow \: f = \dfrac{389}{8} [/tex]
[tex]\qquad \sf \dashrightarrow \: f \approx 48.62 \: \: hertz[/tex]
And we know the Reciprocal relationship between frequency and period ~
So, let's find it's period •
[tex] \sf{\qquad \sf \dashrightarrow \: t = \dfrac{8}{389}} [/tex]
[tex] \sf{\qquad \sf \dashrightarrow \: t \approx 0.02 sec } [/tex]
Find the equivalent resistance of this circuit.
Answer:
320
Explanation:
Group R1 and R2
Then group R1'2 with R3
Explaination :
Here the given circuit is both in series and parallel. So we would be first calculating the total resistance in series.
Rs = R1 + R2 .... n
Rs = 100Ω + 220Ω
Rs = 320Ω
Therefore, resistance in series combination is of 320Ω.
Now, the circuit would be combined in parallel.
As we know that,
1/Rp = 1/R1 + 1/R2 +... 1/n>> 1/Rp = 1/320 + 1/320
>> 1/Rp = 1 + 1 / 320
>> 1/Rp = 2 / 320
>> 1/Rp = 1 / 160
Cross multiplying them,
>> Rp = 160Ω
Therefore,
Equivalent resistance of circuit is of 160Ω3d2
You have been asked to find out the best material for insulating a hot water tank.
You have three materials: aluminium foil, cotton wool and expanded polystyrene.
Describe an experiment to compare the effectiveness of these materials.
Include in your description the way you would use your results to decide the most
effective material.
The most effective insulating material is polystyrene.
What is insulating material?The material which isolates the body and doesn't allow heat and mass to flow out of the control system.
The insulating material should have the lowest thermal conductivity.
Polystyrene foam has low thermal conductivity which makes it a great insulator to heat.
Aluminum foil can be an effective insulating material because it doesn't flow heat out into the environment.
Cotton wool is effective, but not it is not fire resistant.
Thus, the best effective insulating material is polystyrene.
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Energy from the sun drives the _ of the water from the ocean surface. As the air moves up the west side of the mountain, the water vapor cools and undergoes _ . The force of gravity causes the _ of the water from the cloud. Choices for the _ are condensation, evaporation, precipitation
Answer: The air is full of water, as water vapor, even if you can't see it. Condensation is the process of water vapor turning back into liquid water, with the best example being those big, fluffy clouds floating over your head. And when the water droplets in clouds combine, they become heavy enough to form raindrops to rain down onto your head.
Explanation:
Two pistons of a hydraulic lift have radii of 2. 67 cm and 20. 0 cm, respectively. The downward force on the 2. 67-cm piston that is required to lift a mass of 2000 kg supported by the 20-cm piston is
The downward force on the 2. 67-cm piston that is required to lift a mass of 2000 kg supported by the 20-cm piston is 350 N.
What is pascal law?Pressure applied to a closed system of fluid will be transfer at each point of the fluid and the boundaries of the system.
Let suppose at the two point of such system the input force apllied is F₁ and output force we get is F₂. The area of this points is A₁ and A₂ respectively. As the pressure at both point is same. Then by the pascal law,
[tex]\dfrac{F_1}{A_1}=\dfrac{F_2}{A_2}\\[/tex]
In case of radius,
[tex]\dfrac{F_1}{\pi r_1^2}=\dfrac{F_2}{\pi r_2^2}\\\\\dfrac{F_1}{r_1^2}=\dfrac{F_2}{ r_2^2}[/tex]
Two pistons of a hydraulic lift have radii of 2. 67 cm and 20. 0 cm, respectively. Thus,
[tex]r_1=2.67\rm\; cm[/tex]
[tex]r_2=20.0\rm\; cm[/tex]
The downward force on the 2. 67-cm piston that is required to lift a mass of 2000 kg supported by the 20-cm piston is The force applied on second piston is,
[tex]F_2=mg\\F_2=2000\times9.81\\F_2=19620 \rm\; N[/tex]
Put the values in the above formula,
[tex]\dfrac{F_1}{2.67^2}=\dfrac{19620}{20^2}\\F_1=\dfrac{19620\times2.67^2}{20^2}\\F_1\approx 350\rm\; N[/tex]
Thus, the downward force on the 2. 67-cm piston that is required to lift a mass of 2000 kg supported by the 20-cm piston is 350 N.
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Gina applied 1,780 J of work to move a sofa 3.8 meters. What amount of force did she exert?
Answer:
468.42N
Explanation:
Here,
Work done(W)=1780J
Displacement(s)=3.8m
As we have,
Work=Force×displacement
Now,
[tex]\hookrightarrow 1780J=F\times3.8m\\\\\hookrightarrow \frac{1780J}{3.8m} =F\\\\\hookrightarrow F=468.42N[/tex]
What is thermodynamics?
o a. the movement of particles
o b. the flow of fluids
o c. the movement of matter
o d. the flow of energy, heat, and work
(figure 1)shows the wave function of an electron in a rigid box. The electron energy is 14. 5 ev. You may want to review (page 1151)
The energy of an electron in a rigid box when it is in the next higher state is 19.6 eV
What is electron energy?The energy carried by the electron when jumping from one energy level to another is called as electron energy.
Energy in the nth level for a rigid box of length L and mass of electron m is represented as
[tex]E_{n} = \dfrac{n^2{h^{2} } }{8mL^{2} }[/tex]
As the energy is proportional to n².
[tex]\dfrac{E_{n+1} }{E_{n} } =(\dfrac{n+1}{n} )^{2}[/tex]
Substitute the value 3 for n in the above equation. So, we have the energy of an electron is
E₄ = 19.6 eV
Thus, energy of electron in a rigid box when it is in the next higher state is 19.6 eV.
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A proton and an antiproton have equal energies of 450gev. The particles collide head-on. Find the available energy ea. The rest energy of the proton is 938mev
The available energy ea when the proton and the antiproton have equal energies of 450gev is 29 GeV.
How to find the available energy after the collision?The available energy can be found out with the following formula.
[tex]E_a=\sqrt{2E_tE_k++(m_1c^2)^2+(m_2c^2)^2}[/tex]
Here C is the speed of light (3×10⁸ m/s), Et is the energy of proton, Ek is the rest energy.
A proton and an antiproton have equal energies of 450gev. The particles collide head-on. The rest energy of the proton is 938mev
Thus, put the given values in the above formula,
[tex]E_a=\sqrt{2(450\times\dfrac{10^9eV}{1MeV})(938\times\dfrac{10^6eV}{1MeV})+(938\times\dfrac{10^6eV}{1MeV})^2+(938\times\dfrac{10^6eV}{1MeV})}\\E_a=29\rm\; Gev[/tex]
Thus, the available energy ea when the proton and the antiproton have equal energies of 450gev is 29 GeV.
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A 24 V battery is connected to a voltage divider circuit consisting of a 1 resistor and a 2 resistor. What is the voltage across the 2 resistor?
Answer:
8 V
Explanation:
Equivalent R
1/1 + 1/2 = 1/R3/2 = 1/RR = 2/3ΩFinding Current
I = V/RI = 24/2I = 12AFinding V
V = 12 * 2/3V = 8 VCan someone please answer this, ill give you brainliest Would be very appreciated.
Answer:
frost wedging
Explanation:
When glaciers melt and the rock beneath is weathered and broken down, this is called frost wedging.
Compare the amount of work done when one man uses an ideal pulley to lift a 500 newton weight 2 meters and one man lifts a 500 newton weight 2 by hand.
Select one:
a. Depends on the number of pulleys.
b. More work is done when one man lifts the weight by hand.
c. More work is done when one man lifts the weight using a pulley.
d. The amount of of work is the same with or without the lifting pulley.
More work is done when one man lifts the weight using a pulley. Option C is correct.
What is mechanical advantage ?Mechanical advantage is a measure of the ratio of output force to input force in a system, it is used to obtained efficiency of forces in levers and pulley.
It is an effective way of amplify the force in simple machines like lever The theoretical mechanical advantage is defined as the ratio of the force responsible for the useful work in the system to the applied force.
More work is done when one man lifts the weight using a pulley. With the pulley, the mechanical advantage is increasing.
Hence, option C is correct.
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A beach ball is rolling in a straight line toward you at a speed of 9 m/sec. it's momentum is 3 kg.m/sec. what is the mass of the beach ball?
Answer:
1/3 kg
Explanation:
Concepts
The formula p = mv tells us that momentum is mass times velocity. We can easily rearrange this equation to solve for m by dividing both sides by v:
p/v = mv/vm = p/vApplication
We are asked to find the mass of a beach ball, given the velocity as 9 m/s and the momentum as 3 kg · m/s. We can use the formula m = v/p to find the mass of the ball in kilograms.
Solution
[tex]m = \frac{3}{9}[/tex] [tex]m = 1/3[/tex]How many stars has been observed by Hubble telescope till now ?
Answer:
More Than 1.3 million.
Hope it helps :))
‼️PLEASE ANSWER WILL MARK BRAINLIEST‼️
Answer:
b 1000
if you multiply 2m/s by 500 you get 1000 it should look like this.
500 x 2m/s
Consider a pendulum of length 3. 171 m. The acceleration of gravity is 9. 832 m/s2. A) what is its period at the north pole?answer in units of s
The period of the pendulum of length 3. 171 m when acceleration of gravity is 9. 832 m/s, is 3.57 seconds.
What is time period of pendulum?Pendulum is the body which is pivoted to a point and perform back and forth motion around that point by swinging due to the influence of gravity.
The time period of a pendulum is the time taken by it to complete one cycle of swing left to right and right to left.
It can be given as,
[tex]T=2\pi \sqrt{\dfrac{L}{g}}[/tex]
Here, (g) is the gravitational force of Earth and (L) is the length of the pendulum.
A pendulum of length 3.171 m. The acceleration of gravity is 9.832 m/s2. The period at the north pole is,
[tex]T=2\pi \sqrt{\dfrac{3.171}{9.832}}\\T=3.57\rm\; s[/tex]
Thus, the period of the pendulum of length 3. 171 m when acceleration of gravity is 9. 832 m/s, is 3.57 seconds.
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What are the minimum energies of the two oppositely directed gamma rays in a PET procedure?
The minimum energy of the two oppositely directed gamma rays in a PET procedure is : 0.51 MeV
What happens in a PET procedure ?In a PET procedure when an electron and positron collide the energy equivalent of their individual masses are converted into gamma rays which will move in directions opposite to each other.
Given that an electron and a positron posses equal masses the minimum energy of the gamma ray will be 0.51MeV
Hence we can conclude that the minimum energy of the two oppositely directed gamma rays in a PET procedure is 0.51MeV.
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Where in the galaxy are the most stars born?
Answer: Stars are formed in dust clouds and are found in most galaxies.
Explanation:
Answer: Stars form inside relatively dense concentrations of interstellar gas and dust known as molecular clouds.
Explanation:
Points a and b are nearby a proton in otherwise empty space. the potential is chosen to be zero very far away from the proton. the potential at a is half as much as the potential at b. compared to the electric field energy density at b, the electric field energy density at a is __
Compared to the electric field energy density at b, the electric field energy density at a is large by a factor of 16.
What is potential energy?The energy of a particle by virtue of its position.
The potential at B = Vb =V
Vb = 1/4π∈₀ x e/r₁ = ke/r₁
V =ke/r₁
and r₁ = ke /V
The potential at A = Va = 2V
2V = ke/r₂
r₂ = ke/2V
The electric field at point B. Eb = ke/r₁²
Substitute the value of r₁, we get
Eb = V²/ke
The electric field at point A , Ea = ke /r₂²
Substitute the value of r₂, we get
Ea = 4V²/ke
The electric field energy density at point A and B,
Ua = 1/2 ∈Ea²
Ub = 1/2 ∈Eb²
electric field energy density is proportional to the square of electric field at the particular point.
Ua/Ub =(Ea/Eb)²
Substitute the values, we get
Ua/Ub = 16
Thus, compared to the electric field energy density at b, the electric field energy density at a is large by a factor of 16.
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Motion is a change in
1.Time
2.Speed
3.Position
4.Velocity
Motion is a change in position measured by distance and time.
The dark fringe for m = 0 in a young's double-slit experiment is located at an angle of θ = 15°. What is the angle that locates the dark fringe for m = 1?
Answer:
51°
Explanation:
dark fringe equation = dsinθ = (m + 1/2)λ
sinθ = [(m + 1/2)λ]d
sinθ1 = [(m + 1/2)λ]d
sinθ1/sinθ = [(m + 1/2)(λ/d)] / [[(m + 1/2)(λ/d)] = [(m + 1/2)] / [(m + 1/2)]
sinθ1 = [(m + 1/2)] / [(m + 1/2)] (sinθ)
sinθ1 = [1+1/2]/[0+1/2] (sin15)
sinθ1 = 3sin15
sinθ1 = 0.77645
θ1 = sin^-1( 0.77645)
θ1 = 50.94° = 51°
The dark fringe for m = 0 in a young's double-slit experiment is located at an angle. The angle that locates the dark fringe for m = 1 is 51°.
What is dark fringe?When light passes through a slit , it produces a spectrum which can be seen on the screen kept a distance in form of fringes of different intensity. The fringe with intensity zero is called the dark fringe.
Given is the angle θ = 15°
The equation for the dark fringe is
d sinθ = (m + 1/2)λ
For m= 0 and m=1, the ratio of the sines is
sinθ₁/sinθ₀ = [(m + 1/2)] / [(m + 1/2)]
Rearranging for sinθ₁, we have
sinθ₁ = [(m + 1/2)] / [(m + 1/2)] (sinθ₀)
Substituting the values into the equation and solving for θ₁
sinθ₁ = [1+1/2]/[0+1/2] (sin15)
θ₁ = 51°
Thus, the angle that locates the dark fringe fro m = 1 is 51°.
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at 20° c, 33 meters of copper wire has a restaurants of 0.6 ohms. what is the resistance of 165 meters?
Resistance for 165 metres is 3 ohms.
Just as water flows from a region of high pressure to a region of low pressure, electric charge flows from a region of:.
Due to concentration difference, electric charge flows from a region of high electric potential to a region of low electric potential.
How electric charge move?Electric charge flows from a region of high electric potential to a region of low electric potential because of concentration difference. This movement is same as the diffusion in which molecules move from high concentration to lower concentration.
So we can conclude that due to concentration difference, electric charge flows from a region of high electric potential to a region of low electric potential.
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1. As a person stands on earth they put a force on the ground and the ground puts a force on them.
How do these forces compare?
2. The sheet on your bed gives negative charged electrons to your blanket on your bed. If both objects
started this interaction as neutral, what is the charge of the sheet now?
3. A batter swings a Louisville Slugger Baseball bat that has a charge of +12, while a pitcher throws a
baseball with a charge of -2. What is the net charge of the two objects in this scenario?
4. In the bat and ball example (above in question 3), what will the charge of the ball be after the batter
hits it with the bat?
5. We know that opposite charges attract each other, but according to Coulomb's Law what is the single
most important factor in the strength of these forces?
Answer:
mb
Explanation:
m b
The formulas used to analyze the horizontal and vertical motion of projectiles launched at an angle involve the use of which function(s)? tangent only cosine only sine and tangent cosine and sine
The formulas used to analyze the horizontal and vertical motion of projectiles launched at an angle involve the use of tangent, cosine and sine.
What is vertical motion of a projecile?The vertical motion of a projectile is affected by gravity and the velocity of vertical motion given by the following formula;
Vy = Vsinθ
What is horizontal motion of a projecile?The horizontal velocity of a projectile is given by the following formula;
Vx = Vcosθ
Direction of the motionThe direction of the motion is calculated as follows;
tanθ = Vy/Vx
Thus, the formulas used to analyze the horizontal and vertical motion of projectiles launched at an angle involve the use of tangent, cosine and sine.
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Answer:
d
Explanation:
edg 2022
Please help help help mee
Answer:
.60 A
Explanation:
The RMS (Root Mean Square) voltage (the effective voltage) of the PEAK voltage is .7 * peak
.7 * 425 = 297.5 v
Now, V = IR re-arranged to V/R = I
297.5 v / 500 ohm = .595 A = ~ .6 A
5) Select the best answer.
Which object will accelerate faster?
an object that has 500 N of force applied to it
an object that has 50 N of force applied to it
Answer:
I think the object with 500 N of force applied.
An astronaut is weighed before he sets off to the Moon. He has a mass of 80 kg.
What will his weight be on Earth?
formula
weight= mass×gravity
weight=80×10=800
Help!
11. A string vibrates at a frequency of 15 Hz. What is its period?
12. A speaker vibrates at a frequency of 292 Hz. What is its period?
13. A swing has a period of 12 seconds. What is its frequency?
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
As we know, period (t)of a wave and it's frequency (f) are Reciprocal of each other, so if one is know then we can just reverse the order to get the other one.
that is :
[tex]\qquad \sf \dashrightarrow \: frequency = \dfrac{1}{period} [/tex]
Now, let's move on to problems ~
# 11. f = 15 hertz, t = ?
[tex]\qquad \sf \dashrightarrow \: t = \dfrac{1}{15} \: \: sec[/tex]
[tex]\qquad \sf \dashrightarrow \: t \approx0.067 \: \: sec[/tex]
#12. f = 292 hertz, t = ?
[tex]\qquad \sf \dashrightarrow \: t = \dfrac{1}{292} \: \: sec[/tex]
[tex]\qquad \sf \dashrightarrow \: t \approx0.0034 \: \: sec[/tex]
#13. t = 12 seconds, f = ?
[tex]\qquad \sf \dashrightarrow \: f= \dfrac{1}{12} \: \: hertz[/tex]
[tex]\qquad \sf \dashrightarrow \: f \approx0.083 \: \: hertz[/tex]
We know that, frequency = reciprocal of the period of time an object swings or vibrates at. Therefore,
[tex]\tt\:FORMULA \downarrow\\\\\star\boxed{\mathfrak{Frequency = \frac{1}{period \: of \: time}}}[/tex]
Now, let's solve the questions by using this formula.
[tex]\rule{150pt}{2pt}[/tex]
11. Frequency = 15 Hz
Period = ?
[tex]\sf\:Frequency = \frac{1}{period}\\\sf\:15 = \frac{1}{period}\\\boxed{\bf\:period = \frac{1}{15} = 0.67 \: s}[/tex]
[tex]\rule{150pt}{2pt}[/tex]
12. Frequency = 292 Hz
Period = ?
[tex]\sf\:Frequency = \frac{1}{period}\\\sf\:292 = \frac{1}{period}\\\boxed{\bf\:period = \frac{1}{292} = 0.0034 \: s}[/tex]
[tex]\rule{150pt}{2pt}[/tex]
13. Period = 12 s
Frequency = ?
[tex]\sf\:Frequency = \frac{1}{period}\\\sf\:Frequency = \frac{1}{12}\\\boxed{\bf\:Frequency = 0.083 \: Hz}[/tex]
[tex]\rule{150pt}{2pt}[/tex]
Note:The SI units of,
Frequency = Hertz (Hz)Period of time = Second (s / sec)[tex]\rule{150pt}{2pt}[/tex]
Can someone please answer this, ill give you brainliest Would be very appreciated.
Thermal stress is a type of (options, chemical, mechanical, biological) weathering.
Answer:
mechanical
Explanation:
Thermal stress is a type of mechanical weathering. This occurs due to breakdown of rocks which takes place via expansion and/or contraction induced by heating and/or cooling.
What would happen to a plastic pop bottle full of air if it were taken 1000 m below the surface of the ocean? What would happen to it if it were taken 10 000 m into the atmosphere? Explain your answer.
Answer:
if it were submerged 1000 m in the ocean it would be crushed because of the differences of the air and water pressure.
If it were taken 10,000 m (higher than Mt Everest) it would explode due to the differences of external and internal air pressures.
