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Answer:
R = U^2 sin 2 θ / g
θ represents the degrees above the horizontal that the particle was fired
sin 2 θ is a maximum for θ = 45 deg
Then sin 2 θ = sin 90 = 1 the max value of R
Related Questions
2. A 60-nc point charge is located at the center of a 'pi cube of side length m What is the electric flux through each of the faces of the cube?
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Answer:
Bağışlayın, bəzi problemlərim olduğu üçün bunu edirəm.
How is an image created by an X-ray machine? A. High-energy electromagnetic waves are either absorbed by or reflected by body tissue. B. Low-energy electromagnetic waves are either reflected by or transmitted through body tissue. C. Low-energy electromagnetic waves are either absorbed by or transmitted through body tissue. D. High-energy electromagnetic waves are either absorbed by or transmitted through body tissue.
Answers
Answer: C Low energy electromagnetic waves are either reflecting by or transmitted through body tissue.
Explanation:
Felix made a chart listing the uses for two types of mirrors. A 2 column by 2 row table. Column 1 is titled X and contains the following entries: Used as side view mirrors on cars, Used to help people see traffic around blind corners. Column 2 is titled Y and contains the following entries: Used in dental instruments, Used in telescopes to produce enlarged images Which headings belong in the chart? X: Plane Y: Convex X: Concave Y: Plane X: Convex Y: Concave X: Convex Y: Plane.
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Explanation:The image shows that the object (in this case it's candle) is in between the focal point and the mirror itself. In this case the one ray which is parallel to the mirror axis will pass through the focal point where as the second ray will first pass through the focal point and then touches the tip of the candle. If we extend the two rays behind the mirror, we will get the larger and upright image behind the mirror (as shown in the image attached with this post). Hence correct option is (C): It will be larger and upright.
Answer:
X: convex Y: Concave
Explanation:
Just got it right
Caleb does the following:
i. walks 4 m, south
ii. walks 8 m, east
iii. walks 4 m, north
iv. walks 8 m, west.
Her overall displacement is .....?
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Why does an iron nail sinks in water but a wooder cork floats on water?
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Answer:
Because nail is made of metal
If you hold a heavy weight over your head, the work you do __________. Is less than zero is greater than zero is converted into chemical energy Is zero. Is converted into potential energy
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If you hold a heavy weight over your head, the work you do is Is converted into potential energy.
What is Work done?Work is said to be done when the applied force displaces an object over a given distance.
Work - energy theoremWork energy theorem states that, the work done on object is equal to change in mechanical energy of the object.
When an object is raised over a given distance the work done is equal to the potential energy of the object given as;
W = P.E = mgh
Thus, If you hold a heavy weight over your head, the work you do is Is converted into potential energy.
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What is the kinetic energy of a 1.000 g bullet traveling at 1,000 m/s?
Answers
Answer: B
Explanation:
The conventional units for Joules is defined with kilograms. We are given the mass of the bullet in grams. Using the conversion factor of 1kg = 1000g, we get that:
[tex]1g*\frac{1kg}{1000g} =1*10^-^3kg[/tex]
Kinetic energy is defined to be:
[tex]KE=\frac{1}{2} mv^2[/tex]
[tex]KE=\frac{1}{2} (10^-^3kg)(1000m/s)^2[/tex]
[tex]KE=500J=5*10^2J[/tex]
please help me with this, This is very important for me
Answers
Answer:
(a) parallel circuit
(b) (i) ammeter (ii) current
Hope this helps!
What would a wave with a low amplitude sound like? Question 3 options: It would sound quiet. It would sound loud. It would sound squeaky. It would sound deep
Answers
Answer:
it would be loud
Explanation:
it would be loud
i need help with this
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Hope this helps!!!
What phase of the moon comes directly before a full moon?.
Answers
Suppose you had an electrical circuit and decided to change it into a new circuit. does the equivalent resistance of the new circuit compare to the old one ? If you were to insert additional resistors in series, how 。
a. No effect on the equivalent resistance
b. The equivalent resistance decreases
c. The equivalent resistance increases
Answers
Answer:
Yes becuase the circuit is fryed like sum french fries so yes yes is the yes option yes okay, yes but no
Explanation:
If you were to insert additional resistors in series, the equivalent resistance increases. The correct option is c.
What is equivalent resistance?The resistances when connected in series has the equivalent resistance equal to the sum of all the individual resistances.
In the series circuit, the equivalent resistance is
Req= R₁ + R₂ + R₃
Suppose you had an electrical circuit and decided to change it into a new circuit.
The current through the circuit is the same for each resistor in a series circuit and is equal to the applied voltage divided by the equivalent resistance.
Yes, the equivalent resistance of the new circuit compare to the old one.
If you were to insert additional resistors in series, the equivalent resistance increases.
Thus, the correct option is c.
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How can scientists best confirm and validate the results of an experiment so they can publish their findings?
by removing the control from the experiment
by adding more variables to the experiment
by decreasing the number of trials
by creating a replicable experiment
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I think by adding more variables to the experiment.
Validity is when
the control variable the same
Instruction answers the aim
Correct equipments used
Which of the following is not true about potential energy?
Select one:
a.
b.
C.
d.
Potential energy is stored energy.
Potential energy is related to position.
Potential energy is a scalar quantity.
Potential energy has direction.
Answers
Answer:
[tex]\huge\boxed{\sf Option \ D.}[/tex]
Explanation:
Potential Energy:
Energy stored due to the position of any object is usually known as the potential energy of the object.Type of Quantity:
Potential energy is a scalar quantity which means it is only defined by its magnitude and has no direction.Unit:
The unit of potential energy is joules.Types:
Gravitational potential energyElastic potential energyElectric potential energyNuclear potential energy[tex]\rule[225]{225}{2}[/tex]
Why do you think there are differences on how far two vehicles should be from each other depending on what types of vehicle they are? How does this promote road safety?
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Answer:
to reduce the pace of accident
what is the speed of a wave has a wavelength of 0.5 m/s and a frequency of 2 hz?
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Answer: The equation that relates wavelength and frequency for electromagnetic waves is: λν=c where λ is the wavelength, ν is the frequency and c is the speed of light.
10/0.5=20 meter.
Explanation:
The speed of a wave has a wavelength of 0.5 m/s and a frequency of 2 hz is 0.25 m.
What is wave ?Wave is is a disturbance in a medium that carries energy as well as momentum . wave is characterized by amplitude, wavelength and phase. Amplitude is the greatest distance that the particles are vibrating. especially a sound or radio wave, moves up and down. Amplitude is a measure of loudness of a sound wave. More amplitude means more loud is the sound wave.
Wavelength is the distance between two points on the wave which are in same phase. Phase is the position of a wave at a point at time t on a waveform.
There are two types of the wave longitudinal wave and transverse wave.
Longitudinal wave : in which, vibration of the medium (particle) is parallel to propagation of the wave. Sound wave is a longitudinal wave.
Transverse wave : in which, vibration of the medium (particle) is perpendicular to propagation of the wave. Light wave is a Transverse wave.
The relation between velocity, frequency and wavelength is,
c = λν
Where λ is wavelength, ν is frequency and c is velocity.
Given,
c = 0.5 m/s
ν = 2 hz
λ = ?
Putting all the values in the equation,
0.5 = 2λ
λ = 0.5/2 = 0.25 m
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what is the name of Li1S
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hope it helps
A steel wire 0.72 m long has a mass of 5 x 10⁻³ kg. If the wire is under a tension of 60N, what is the speed of the transverse waves on the wire?
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Answer:
93m/s
Explanation:
Solution,
Here,
Length(l)=0.72m
Mass(m)=5x 10⁻³
T=60N
As we have
v=√T/μ
And
μ=m/l
μ=5 x 10⁻³ /0.72
Now
v=√60×0.72/5 x 10⁻³
v=√8640
v=92.95m/s=93m/s
Why do we need to convert mass to moles in stoichiometry problems.
Answers
What would happen if everyone on earth screamed at the same time?.
Answers
Answer:
There would be a huge sound like an applause. At 200 decibels (the loudest possible sound ever created on Earth), it could shatter ear drums.
Explanation:
Hope this helps
If everyone on the planet screamed at the same moment, it would be a tremendously loud and chaotic event.
The particular impacts and repercussions, however, would be dependent on a variety of parameters such as the strength of the screams, the length, and the location of persons.
The cumulative cries of billions of individuals would produce a deafening loudness, perhaps reaching levels far beyond what the human ear can handle.
Thus, those in close proximity to people yelling may experience discomfort, confusion, and even bodily pain as a result of the loudness.
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A transformer has 200.0 turns in its secondary coil and 120.0 turns in its primary coils. The primary coil is connected to a 80.00 V power supply. If 3.50 A flows in the primary coil, then how much current is there in the secondary coil
Answers
No.of primary turns/no.of secondary equal to current in primary /current in secondary therefore 200/120=3.50/C.in secondary =2.1A
The force between two objects is 60. N. One object has a positive charge of 1.2 x 10-6 C, while the other has a negative charge of -1.2 x 10-6 C. How far apart are the two objects in cm? (1.5 cm)
Answers
The distance between the two objects is 1.5 cm.
To calculate the distance between the two objects, we use the formula obtained from Columb's law
What is Columb's law?Columb's law states that the force of attraction or repulsion between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
Formula:
F = kqQ/r²............... Equation 1Where:
F = Force between the two objectsr = Distance between the objectsQ and q = charges on both objects respectively.k = Columb's constantMake r the subject of the equation
r = √(kqQ/F).............. Equation 2From the question,
Given:
F = 60 Nq = 1.2×10⁻⁶ CQ = 1.2×10⁻⁶ Ck = 8.99×10⁹Substitute these values into equation 2
r = √[(1.2×10⁻⁶×1.2×10⁻⁶×8.99×10⁹)/60]r = √[(12.9456×10⁻³)/60]r = √(2.16×10⁻⁴)r = 1.47×10⁻² mr = 1.47 cmr ≈ 1.5 cm.Hence, The distance between the two objects is 1.5 cm.
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A website is having a sale, and all items are 25% off the original price, p
Which expressions can be used to find the price of an item after the discount?
Select all that apply
Α.
0.75
B
1.25
CP_25
DP - 0.25
E 001P x 75
Answers
A lightweight plastic rod has a mass of 2.0 kg attached to one end and a mass of 2.5 kg attached to the other end. The rod has a length of 1.20 m. How far from the 2.0-kg mass should a string be attached to balance the rod
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The distance from the 2.0 kg mass at which a string should be attached to balance the rod is 0.67 m.
Distance can be defined as the horizontal length between two points.
To calculate the distance at which the string must be attached to balance the rod, we use the formula below.
Formula:
m₁gx = m₂g(1.2-x)................. Equation 1From the question,
Given
m₁ = 2.0 kg m₂ = 2.5 kgx = Distance of the string from the 2.0 kg massg = Acceleration due to gravity.= 9.8 m/s²Substitute these values into equation 1
2(9.8)(x) = 2.5(9.8)(1.2-x)Solve for x
19.6x = 29.4-24.5xCollect like terms
19.6x+24.5x = 29.444.1x = 29.4x = 29.4/44.1x = 0.67 mHence, the distance from the 2.0 kg mass at which a string should be attached to balance the rod is 0.67 m.
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Four objects are being tested to see how they are affected by fluid friction. Object W has a surface area of 4. 5 cm2, Object X has a surface area of 2. 5 cm2, Object Y has a surface area of 6. 2 cm2, and Object Z has a surface area of 3 cm2. Which object would experience the most fluid friction? W X Y Z.
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Answer: the most affected object by friction is the Y
Explanation:
The fluid friction consists of 2 parts.
viscous resistance and friction with air.
assuming that the objects are in contact with the air, the situation is described by the following equation.
with: C= numerical drag coefficient
p= density
A= Area of the object
v= velocity
so assuming the other variables are constants the area of the object is directly proportional to the fluid friction
Please help!
Which resources are renewable resources?
Select all correct answers.
1. natural gas
2. solar
3. coal
4. hydroelectric
5. biomass
Answers
Answer: The answers are Biomass, Solar, and Hydroelectric! :)
Explanation:
How does an insulator stop the flow of an electric current? Question 9 options: Electrons in an insulator do not move readily. Insulators convert electric energy to other forms of energy. Insulators have too many electrons. Insulators have a positive charge so they absorb electrons.
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Insulators are often defined as materials that do not allow electricity to flow through them. Option A is correct. Electrons in an insulator do not move readily.
What is an insulator?Insulators are commonly employed in physics. Insulators are often defined as materials that do not allow electricity to flow through them.
Insulators are also referred to as poor electrical conductors. We may discover various instances of these insulators in our daily lives. Insulators include materials such as paper, glass, rubber, and plastic.
Insulators are often defined as materials that do not allow electricity to flow through them. Electrons in an insulator do not move readily
Hence option A is correct. Electrons in an insulator do not move readily
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Find the kinetic energy of a body of mass 2 kg moving with a speed of 10 ms^-1 .
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Question :-
Find the Kinetic Energy of a body of Mass 2 kg moving with a Speed of [tex] \bf{10 \: {ms}^{ - 1} } [/tex] .Answer :-
Kinetic Energy is 100 Joule .Explanation :-
As per the provided information in the given question, we have been given that the Mass of the body is 2 kg . Speed of the body is given [tex] \bf{10 \: {ms}^{ - 1} } [/tex] . And, we have been asked to calculate the Kinetic Energy .
For calculating the Kinetic Energy , we will use the Formula :-
[tex] \bigstar \: \: \boxed{ \sf{ \: Kinetic \: Energy \: = \: \dfrac{1}{2} \: \times \: {mv}^{2} \: }} \\ [/tex]
Where ,
M denotes to the MassV denotes to the SpeedTherefore , by Substituting the given values in the above Formula :-
[tex] \longmapsto \: \: \sf{ Kinetic \: Energy \: = \: \dfrac{1}{2} \: \times \: {m \: \times \: v}^{2} } \\ [/tex]
[tex] \longmapsto \: \: \sf{Kinetic \: Energy \: = \: \dfrac{1}{2} \: \times \: 2 \: \times \: {10}^{2} } \\ [/tex]
[tex] \longmapsto \: \: \sf{Kinetic \: Energy \: = \: \dfrac{1}{2} \: \times \: 2 \: \times \: 100 } \\ [/tex]
[tex] \longmapsto \: \: \sf{Kinetic \: Energy \: = \: \dfrac{1 \: \times \: 2 \: \times \: 100}{2}} \\ [/tex]
[tex] \longmapsto \: \: {\textbf {\textsf {Kinetic \: Energy \: = \: 100 \: Joule }}} [/tex]
[tex] \underline {\rule {180pt} {4pt}} [/tex]
The kinetic energy of the body with the given value of mass travelling at the given speed is 100 Joules.
What is Kinetic Energy?Kinetic energy is simply a form of energy a particle or object possesses due to its motion.
It is expressed as;
K = (1/2)mv²
Where m is mass of the object and v is its velocity.
Given the data in the question;
Mass of the body m = 2kgVelocity v = 10ms⁻¹Kinetic energy of the train K = ?We substitute our given values into the above expression to determine the kinetic energy of the body.
K = (1/2)mv²
K = (1/2) × 2kg × (10ms⁻¹)²
K = 0.5 × 2kg × 100m²s⁻¹
K = 100kgm²s⁻¹
K = 100J
Therefore, the kinetic energy of the body with the given value of mass travelling at the given speed is 100 Joules.
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If Felix jumped from an even greater distance, do you think the force on him would be different? If so, how?
Help, This is my last question
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Answer:
it would be the same because they are equal
Define propagation of sound
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Considering the definition of speed and propagation of sound, sound is a sequence of waves of pressure which propagates through compressible media and depends on the characteristics of the medium in which the propagation occurs.
Definition of speed and propagation of soundSound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid.
That is, sound is a longitudinal wave, mechanical (does not travel in a vacuum) and propagates in all directions, so that the wave front is spherical.
Propagation of sound involves energy transport without matter transport, in the form of mechanical waves.
The speed of propagation of a sound wave depends on the characteristics of the medium in which the propagation occurs and not on the characteristics of the wave or the force that generates it. The speed of propagation of sound waves is also known as the speed of sound.
SummaryIn summary, sound is a sequence of waves of pressure which propagates through compressible media and depends on the characteristics of the medium in which the propagation occurs.
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