Answer:
It would take 1 s to hear the echo.
Explanation:
Here, the sound covered a total of 340 meters, since it bounces off the canyon wall and travels back to Miles in the form of echo.
The time elapsed can be determined by,
v = [tex]\frac{2D}{t}[/tex]
⇒ t = [tex]\frac{2D}{v}[/tex]
where: v is the speed of sound in air (343 m/s), D is the distance of the nearest canyon (170 m).
So that,
2D = 2 x 170 = 340 m
Thus,
t = [tex]\frac{340}{343}[/tex]
= 0.9913 s
t = 1 s
It takes 1s for Miles to hear his echo.
A positively charged light metal ball is suspended between two oppositely charged metal plates on an insulating thread as shown below. After being charged once, the plates are disconnected from the battery. Describe the behavior of the ball. Please use 3 content related sentences. (
Answer:
The positive ball would go first to the negatively charged plate.
Explanation:
After which, it would hold a more negative charge. Due to the negative charge, it would travel towards the positive plate. Thereby, it would transfer negative electrons to the positive plate once more. In doing so, it would transfer positive protons to the negative plate. After which, it would hold more negative electrons and be drawn towards the positive plate once more. The Process would continue until the once-positive and once-negative became neutral ( and were discharged.) Additionally, the ball hanging on the insulator thread would also be neutral and discharged.
A ball is launched horizontally at a speed of 4.0m/s from the top of a cliff that is 24.6 meters high. Where in the ball's trajectory is the horizontal speed a maximum? Explain how you know.
Answer:
The horizontal speed of the ball is constant where there is little resistance from the air
Explanation:
From the given parameters of the ball, we have;
The horizontal speed of the ball = 4.0 m/s
The height of the cliff from which the ball is launched = 24.6 meters
The direction in which the ball is launched = Horizontally
The components of the forces acting on the ball are;
The vertical force = The Earth's gravitational attraction
The horizontal force = 0 N (There are no horizontal forces acting on the ball)
According to Newton's first law of motion, the ball will continue in its uniform motion or in its rest state unless acted upon by a force
Therefore, given that there are no horizontal forces component acting on the ball, (little air resistance) the ball will continue with the initial horizontal velocity, such that the horizontal velocity of the ball remains constant.
Is this right? Please help me. ITS SOCIOLOGY!!
Answer:
i think so
Explanation:
I NEED HELP
PLEASEEE
IS MY MIDDLE FINGER FINE
Answer:yea lookin fine
Explanation:
Help pls.!! and explain please
Answer:
so if it's 20 you should put 20 times 10 15 * 30 and 1.3 * 5 mg and if you put that milligrams in there it'll solve the destination I saw the white way you going so yeah just be careful at least you want to make the milligrams even a multimacy with the y i and replace it with the 14a
When hydrogen reacts with oxygen, hydrogen loses electrons. Which term
applies to what happens to hydrogen in this reaction?
A. Oxidation
B. Synthesis
C. Reduction
D. Redox
Answer:
A.) Oxidation
Explanation:
:p
Hydrogen reacts with oxygen, hydrogen loses electrons. The term
applies to what happens to hydrogen in this reaction is
A. Oxidation
What is oxidation reaction ?
Oxidation is a process where a substance: Loses one or more electrons or gains an oxygen atom or we can say that oxidation is a process which involves the addition of oxygen or any electronegative element or the removal of hydrogen or any electropositive element.
Reduction is the gain of electrons or reduction is a process which involves the addition of hydrogen or any electropositive element or the removal of oxygen or any electronegative element.
A synthesis reaction is a type of reaction in which multiple reactants combine to form a single product. Synthesis reactions release energy in the form of heat and light, so they are exothermic.
correct option is A. Oxidation
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R. Una bailarina gira con una frecuencia de 1hz y momento de inercia i = 28.14kg . M2. Calcule su velocidad de giro cuando disminuye su momento de inercia a la mitad.
Answer:
w = 4π rad / s
Explanation:
When the dancer is turning, the body is isolated so the angular momentum is conserved.
initial
L₀ = I₀ w₀
final
L_f = I w
in this case it indicates that the initial moment is Io = 28.14 kg m² and the final moment is half
I = I₀ / 2
frequency and angular velocity are related
w = 2π f
w = 2π 1
wo = 2π rad / s
how angular momentum is conserved
L₀ = L_f
I₀ w₀ = I w
w = [tex]\frac{I_o}{I}[/tex] w₀
let's calculate
w = 2 2π
w = 4π rad / s
How is speed different from velocity?
Answer:Speed is the time rate at which an object is moving along a path
Velocity is the rate and direction of an object's movement.
Explanation:
Hope it helps
what prevents friction
Answer:
control of friction can be done with the help of lubricants
Explanation:
A disturbance that generates a wave may be a simple pulse or shock
True or false
Answer:
That would be true.
-- a bell starts ringing (wave) when you tap it (simple pulse)
-- a pond starts rippling (wave) when a stone drops in (simple shock)
-- a guitar strings starts waving when you pluck it
4. Explain how energy is transformed in a spring.
Answer:
As spring falls in a vertical plane, the change in gravitational potential energy is transformed to elastic potential energy.
Explanation:
To calculate the spring constant, Hooke's law was used, as well as potential energy to calculate the gravitational and elastic potential energy.
Xander goes airborne on his scooter as he exits a half-pipe at Newton's Skate Park. Xander and his scooter have a total mass of 50 kg. The net force acting on Xander and the scooter is 25N. What is Xander's acceleration?
Hello,
QUESTION)According to the 2nd Newton's law,
✔ We have : F = m x a ⇔ a = F/m; with F in N, m in kg, a in m/s²
a = 25/50a =0.5 m/s²Therefore Xander's acceleration is 0.5 m/s².
The total mass of Xander and his scooter is 50 kg and the net force acted due to Xander and his scooter is 25 N then the acceleration will be 0.5 m/s².
What is Acceleration?Acceleration is the rate at which the speed and orientation of a moving object change over time. When a spot or object moves faster or slower along a straight line, it is said to be accelerated. Even though the speed is constant, motion on a circle accelerates so because the direction is always shifting. Both by and to acceleration for all other types of motion.
It is a vector quantity because it has both magnitude and direction.
As per the given information provided by the question,
Mass, m = 50 kg
Force, F = 25 N
F = ma
25 N = 50 × a
a = 25/50
a = 0.5 m/s².
Therefore, the acceleration of Xander's acceleration will be 0.5 m/s²
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Wheel and axle gizmos
Answers;
Explanation:
Wheel and axle gizmos answer key
This process releases a large amount of . Energy ,oxygen ,or water
Answer:
carbon dioxide i think please be right
Explain how do you determine the intensity of earthquake
Answer:
The Richter scale measures the largest wiggle (amplitude) on the recording, but other magnitude scales measure different parts of the earthquake. The USGS currently reports earthquake magnitudes using the Moment Magnitude scale, though many other magnitudes are calculated for research and comparison purposes.
Answer:
To measure the magnitude of an earthquake, the American scientist Charles Richter developed a scale in 1935. Known as the Richter scale, it assigns a number based on the height of the waves on a seismogram (the visual output of a seismograph). Seismographs measure ground motion, including the energy released by an earthquake.
A car has moved 6.8 m from when the driver saw the red light to come to a full stop. If the driver was moving with 31.7 m/s when they saw the traffic light, how long did it take for
them to come to stop?
Answer:
i believe that the answer is 4.661764706 seconds
Speed of a car is 30 m/s. Find its speed in km/h.
110 km/h
5.3 km/h
108 km/h
109 km/h
Answer:
108km/h
Explanation:
1km=1000m
3600s=1 hr
M/s= 3600/1000km/hr= 3.6km/hr
30m/s= 30×3.6km/hr = 108km/hr
I NEED HELP ASAP!!!
The product of the component of a force along the direction of displacement and the magnitude of the displacement are known as:
a.
net force
c.
velocity
b.
work
d.
power
Answer:
a
Explanation:
thats yes according to kinematics
3. How did the team of physicists
make the phonon laser?
Answer:
A team led by Nick Vamivakas has now made the levitated optomechanical analogue to the optical laser by expanding on the optical tweezer,By measuring the scattered light, we are then able to alter the way the beads oscillate and increase the output of energy as measured in phonons
Explanation:
It’s due in like 2 hourssss!!
1. A force of 52N acts upon a 4kg block sitting in the ground. Calculate the acceleration of the object (show work)
2. An object of mass 10kg is accelerated upward at 2 m/s^2. What force is required? (Show work)
3. What is the mass of an object if a force of 17N caused it to accelerate at 1.5m/s^2? (Show work)
Answer:
1. Acceleration = 6.25 m/s²
2. Force = 20 Newton.
3. Mass = 11.33 kg
Explanation:
Given the following data;
1. Force = 25N
Mass = 4kg
To find the acceleration;
Acceleration = force/mass
Acceleration = 25/4
Acceleration = 6.25 m/s²
2. Mass = 10kg
Acceleration = 2 m/s²
To find the force required;
Force = mass * acceleration
Force = 10 * 2
Force = 20 Newton.
3. Force = 17N
Acceleration = 1.5 m/s²
To find the mass;
Mass = force/acceleration
Mass = 17/1.5
Mass = 11.33 kg
Plssss help I need good grade!!!! Plssss and thank u
Answer:
the answer is 'b'
According to me
Answer:
B
Explanation:
It has more negative signs than positive signs
Pls helppp. Is this right?
Answer:
yes you are totally right
Plzzz help!! A stationary speed gun emits a
microwave beam at 2.10x1010 Hz. It
reflects off a car and returns 1030 Hz
higher. What is the speed of the car?
(Unit = m/s)
Answer:
The speed of the car is 14.7m/second or 15 m/second approximately.
Explanation:
A microwave beam at [tex]2.10\times10^1^0Hz[/tex] is generated by a stationary speed gun. It bounces off a car and returns at a higher frequency of 1030 Hz. The car's observed frequency would be the product of adding the two frequencies. That is to say,
F =[tex]2.1\times10^1^0+1030[/tex] =[tex]2.100000103\times10^1^0Hz[/tex]
Using doppler effect formula
[tex]F=\frac{C}{C-V}\times f[/tex]
Where
F = observed frequency
f = source frequency
C = speed of light = [tex]3\times10^8[/tex]
V = speed of the car
Putting the values in the formula -
[tex]2.100000103\times10^1^0=\frac{3\times10^8}{3\times10^8-V}\times2.1\times 10^1^0[/tex]
[tex]\frac{2.100000103\times10^1^0}{2.1\times10^1^0}[/tex] [tex]=\frac{3\times10^8}{3\times10^8-V}[/tex]
[tex]1.000000049=\frac{3\times10^8}{3\times10^8-V}[/tex]
by cross multiplication ,
300000014.7 - 1.000000049V = [tex]3\times10^8[/tex]
Collect the like terms
1.000000049V = 14.71429
Make V the subject of formula
V = [tex]\frac{14.71429}{1.000000049}[/tex]
V = 14.7 m/s
Therefore , the speed of the car is 15m/second approximately.
As our Sun exhausts its supply of hydrogen, it will cool down by 1000 to 2000 Kelvin. But it will also become about 100 times brighter than it is now. Describe the path our Sun will take on the HR diagram, and what type of star the Sun will become.
Answer:
It will move upward and to the right, from the main sequence to the giants.
Explanation:
Plato answer so change it up a bit xx
For a converging lens, a ray arriving parallel to the optic axis
a. appears to come from the principal focal point.
b. passes through the principal focal point.
c. passes through the "other" focal point.
d. appears to come from the "other" focal point.
Answer:
b. passes through the principal focal point.
Explanation:
Light wave can be defined as an electromagnetic wave that do not require a medium of propagation for it to travel through a vacuum of space where no particles exist.
A lens can be defined as a transparent optical instrument that refracts rays of light to produce a real image.
Basically, there are two (2) main types of lens and these includes;
I. Diverging (concave) lens.
II. Converging (convex) lens.
A converging lens refers to a type of lens that typically causes parallel rays of light with respect to its principal axis to come to a focus (converge) and form a real image. This type of lens is usually thin at the lower and upper edges and thick across the middle.
For a converging lens, a ray arriving parallel to the optic axis passes through the principal focal point.
The correct option is b. passes through the principal focal point.
The following information should be considered:
Light wave refers to an electromagnetic wave that does not require a medium of propagation for it to travel via a vacuum of space where no particles exist. A lens refers to a transparent optical instrument that refracts rays of light to produce a real image.
Basically, there are two (2) main types of lens:
Diverging (concave) lens: Converging (convex) lensA converging lens refers to a type of lens that typically causes parallel rays of light with respect to its principal axis to come to a focus (converge) and form a real image.
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Which subatomic particle is NOT found in the nucleus of an atom? *
-protons
-neutrons
-electrons
Answer:
Neutrons
Explanation:
Neutrons are not found in the nucleus of an atom
Answer:
Electrons
Explanation:
=> electrons are not found in nucleus of the
atom
=>. they are outside the nucleus
=> revolving around the nucleus in fixed orbit
hope it helps
The slope of a distance-time graph will give
1. In physical science, work occurs when a ___
distance from the start point.
a. Voltage
b. Power
C. Force
d. Velocity
e. Energy
6. Explain how you could increase the potential energy of an object. *
Answer:
a doubling of the height will result in a doubling of the gravitational potential energy.
Explanation:
3. How does the wavelength of green different from violet-indigo?
Answer:
As the full spectrum of visible light travels through a prism, the wavelengths separate into the colors of the rainbow because each color is a different wavelength. Violet has the shortest wavelength, at around 380 nanometers, and red has the longest wavelength, at around 700 nanometers.
Explanation: