Answers
Answer:
proton is positively charged changechar
Explanation:
Related Questions
The only variable we found that affects the speed of a wave on a string was the tension of the string. How does this relate to how a musician tunes a stringed instrument?
Answers
Answer:
We know that in a string with two fixed points (like the one you will find in a guitar, where the string is "fixed" at the bridge and at the nut) the only thing that defines the speed (the frequency) at which the string vibrates is the tension (the length is also important, but for the 6 strings in the guitar all of them have the same length, but, as you know, when you press in a given fret the note changes, this happens because you are changing the length of the string, finally, the mass of the string is also important, but all the strings have almost the same mass, so we can ignore this).
Then for the open notes (the notes that you play when you don't fret any note) the only thing that defines the note that will sound is the tension of the string.
And a musician can tune the stringed instrument by changing the tension of each string using a tuner, which is the mechanism in the headstock of the instrument). As more tense is the string, higher will be the open note.
A car tachometer indicates the flywheel is spinning at
1,953 RPM. The flywheel has a diameter of 30.7 cm.
What is the centripetal acceleration in meters per
second squared of a point on the edge of the wheel?
Correct Answer: 6,421
Answers
The centripetal acceleration of a point on the edge of the flywheel is 3.40 x 10^3 m/s^2.
What is centripetal acceleration?
Centripetal acceleration is the acceleration of an object moving in a circular path. It is directed towards the center of the circle and is necessary to keep the object moving in a circular path.
To calculate the centripetal acceleration of a point on the edge of the flywheel, we can use the formula:
a = (v^2) / r
where a is the centripetal acceleration, v is the velocity of the point, and r is the radius of the flywheel.
First, we need to calculate the velocity of the point. We know that the flywheel is spinning at 1,953 RPM (revolutions per minute), so we can convert this to revolutions per second (RPS) by dividing by 60.
v = 1,953 RPM / 60 sec/min = 32.55 RPS
Next, we need to convert the diameter of the flywheel to radius by dividing by 2.
r = 30.7 cm / 2 = 15.35 cm = 0.1535 m
Now we can substitute these values into the formula to calculate the centripetal acceleration.
a = (v^2) / r = (32.55 RPS)^2 / 0.1535 m = 3.40 x 10^3 m/s^2
So the centripetal acceleration of a point on the edge of the flywheel is 3.40 x 10^3 m/s^2.
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Which pair of concurrent forces could produce a resultant force having a magnitude of 15.Newtons?
Answers
2) 10. N. 30. N.
Explanation:
Since you need to take into account the direction too, you need to make sure that the concurrent forces of the pair have to be equal or superior to the magnitude needed in both directions.
If the forces are in the same direction: 10 N + 30 N = 40 N > 15 N : OK!
If the froces are in oposite directions: - 10 N + 30 N = 20 N > 15 N : OK!
Brainlist!! Help!! Atom A consists of 10 protons, 12 neutrons, and 10 electrons.
Atom B consists of 10 protons, 10 neutrons, and 12 electrons.
The atoms are isotopes of each other.
The atoms are not isotopes of each other.
Answers
Answer:
They are isotopes of each other
Explanation:
Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.
For atom A and atom B, their number of protons is the same (10)
But their number of neutrons is different (12) and (10)
A mass attached to a spring vibrates back and forth. At maximum displacement, the spring force and the
Answers
ANSWER
Velocity of the mass reaches zero
EXPLANATION
We want to identify what hapens to a mass attached toa a spring at maximum displacement.
When a mass attached to a spring is at its maximum position of displacement, the direction of the mass begins to change. This implies that the velocity of the mass will reach zero.
Hence, at maximum displacement, the velocity of the mass reaches zero.
1) What is the car doing from “O” to “A” and from “F” to “G”?
2) What is happening between “A” to “B”, “C” to “D”, and “E” to “F”?
3) What is the car’s average velocity between “O” and “A”?
4) How long is the car stopped?
Answers
1. The car is moving with a uniform velocity from “O” to “A” and from “F” to “G”.
2. The car is at rest between “A” to “B”, “C” to “D”, and “E” to “F”.
3. The average velocity of the car would be 24 km/hour between “O” and “A”.
4. The car stopped for 7 hours during the whole time of travel
What is Velocity?The total displacement covered by any object per unit of time is known as velocity. It depends on the magnitude as well as the direction of the moving object. The unit of velocity is meter/second. It can also be represented by the infinitesimal rate of change of displacement with respect to time. The generally considered unit for velocity is a meter per second.
As shown in the position time graph of a moving car we can observe and calculate the velocity by the slope of the curve.
If the slope of the position time curve is zero it means its velocity is zero during that time period. The horizontal line represents the zero velocity which means the car would have been at rest.
average velocity = displacement/time
= 24 km/hour
The car stopped for 7 hours during the whole time of travel
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kinetic energy during an object falling
Answers
Answer:
\(kinetic \: energy = \frac{1}{2} m {v}^{2} \\ m = mass \: of \: the \: object \\ v = velocity \: \)
Deshaun Watson launches a football at a speed of 24.7 ms and an angle of 33° above the horizontal How far down
the football field does the football land? What is the max height the football reaches during flight?
Show work
Answers
Answer:
9.23m
Explanation:
Max height = u²sin²theta/2g
u is the speed = 34.7m/s
theta is the angle of elevation = 33°
g is the acceleration due to gravity = 9.8m/s²
Substitute into the formula
Max height = 24.7²sin²33/2(9.8)
Max height = 610.09sin²33/2(9.8)
Max height = 610.09(0.29663)/19.6
Max height = 180.97/19.6
Max Height = 9.23m
Hence the max height the football reaches during flight is 9.23m
Which of the following pieces of home-made equipment is appropriate for use?
O A brick, some rope and a stick that you found on the side of the road
O Some old bottles you found in the garage
O The welcome mat and your sister's jump rope
O Your neighbor's bicycle inner tubes
Answers
Answer:
your neighbors biycyle inner tubes
Explanation:
hope this helps :)
A wave is traveling at a speed of 15 m/s and it's wavelength is 5 m. Calculate the waves frequency
Answers
Answer:
The frequency of this wave is \(3\; \rm Hz\).
Explanation:
The frequency \(f\) of a wave is the number of wavelengths that this wave covers in unit time (typically a second.)
The wave in this question travels at \(v = 15\; \rm m \cdot s^{-1}\). In other words, this wave covers \(15\; \rm m\) in unit time (a second.) How many wavelengths \(\lambda\) would that \(15\; \rm m\;\) correspond to?
The question states that the wavelength of this wave is \(\lambda = 5\; \rm m\). Therefore, there would be \(15 / 5 = 3\) wavelengths in the \(15\; \rm m\) span that this wave covered in the unit time of one second (\(1\; \rm s\).) Hence, the frequency of this wave would be \(3\; \rm s^{-1}\) (three per second,) which is equivalent to \(3\; \rm Hz\) (three Hertzs.)
In general, the frequency \(f\) of a wave with speed \(v\) and wavelength \(\lambda\) would be:
\(\displaystyle f = \frac{v}{\lambda}\).
For the wave in this question:
\(\begin{aligned}f &= \frac{v}{\lambda} \\ &= \frac{15\; \rm m \cdot s^{-1}}{3\; \rm s} = 3\; \rm s^{-1} = 3\; \rm Hz\end{aligned}\).
Matthew is a forensic investigator examining a tool mark. After examination of the tool mark, he knows the type of tool, its dimensions, and its general shape. Which characteristics do these findings describe? A. individual B. striated C. molded D. class
Answers
Answer:
class
Explanation:
An examination of a tool mark is essential when it comes to "Criminalistics" (the study of physical evidence in a crime). It allows the forensic investigator to know what kind of tool was used in the crime scene. There are only two kinds of characteristics of tool marks and these are: individual and class. Striated and molded are types of tool marks. They are not characteristics.
The "class" characteristic of a tool mark allows the investigator to know the shape of tool, its dimensions and its type. However, it doesn't point to the exact tool that was used, but it gives him an idea how the mark was actually created.
Answer: class
Explanation:
A positively-charged particle is released near the positive plate of a parallel plate capacitor. a. Describe its path after it is released and explain how you know. b. If work is done on the particle after its release, is the work positive or negative
Answers
Answer:
a. The electric field lines are linear and perpendicular to the plates inside a parallel-plate capacitor, and always from positive plate to the negative plate. If a positive charge is released near the positive plate, then it will follow a linear path towards the negative plate under the influence of electrostatic force, F = Eq, where q is the charge of the particle. The electric field inside a parallel plate capacitor is constant and equal to
This can be calculated by Gauss' Law.
A positive charge always follow the electric field lines when released. Another approach is that the positive plate repels the positive charge and negative plate attracts the positive charge. Therefore, the positive charge follows a path towards the negative charge.
b. The particle moves from the higher potential to the lower potential. The direction of motion is the same as the direction of the force that moves the particle, so the work done on the particle by that force is positive.
how does the resting energy expenditure change as a person ages
Answers
Answer:
Resting energy expenditure (REE) decreases from young to old age by 1% to 2% per decade [1]. This is partly explained by age-related decreases in fat free mass (FFM) [2]. FFM accounts for 50%–70% of the variance in REE [3,4,5].Explanation:
2
Look at the circult dlagram.
Direction
of current
Battery
Bulb-
What type of circuit is shown?
A. open series circult
B. closed series circuit
C. open parallel circult
D. closed parallel circult
Answers
The direction of the current from the positive to the negative battery terminals and the fact that the bulbs are connected in parallel to each other suggests that this circuit is a Closed Parallel Circuit. The correct option is D.
What is the difference between open and closed circuits?An open circuit and a closed circuit are two types of electrical circuits that describe the flow of electrical current through a circuit.
An open circuit is a circuit in which there is a break in the path of the current, meaning that the current cannot flow through the circuit. In an open circuit, the switch is in the "off" position or there is a broken wire, and so no electrical current can flow through the circuit. This means that there is no voltage or electrical energy being transferred from the source to the load.
On the other hand, a closed circuit is a circuit in which there is a complete path for the current to flow through, meaning that the current can flow through the circuit. In a closed circuit, the switch is in the "on" position, and there is a continuous path for the current to flow from the source to the load and back to the source. This means that there is voltage and electrical energy being transferred from the source to the load.
Here in this question,
The direction of the current from the positive to the negative battery and the fact that the bulbs are connected in parallel to each other suggests that this circuit is a Closed Parallel Circuit.
In a closed parallel circuit, the components are connected in parallel to each other, meaning that they are connected to the same two points in the circuit and the current has multiple paths to flow through. The voltage across each component is the same, and the total current flowing through the circuit is divided among the components according to their resistance.
In contrast, an open series circuit is a circuit in which the components are connected in series, meaning that they are connected end to end in a single path, with no other branch points for the current to follow. If one component fails, the circuit becomes open and the current stops flowing.
Therefore, based on the information provided, the circuit described in the question is a Closed Parallel Circuit.
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A body of mass 10 kg moving on a circular path of radius 1 m completes a rotation in 2 pi sec the centripetal acceleration is A 1m/s 2 B 2m/s 2 C 4m/s 2 D none
Answers
Answer:
1 m/s²
Explanation:
a = v² / r
a = ω² r
a = (2π rad / 2π s)² (1 m)
a = 1 m/s²
What is the angle of refraction?
15 degrees
30 degrees
74 degrees
Answers
Answer:
74 degrees
Explanation:
***************
Answer:
74 degrees on edge
Explanation:
What image is produced by placing an object 4 cm away from a convex lens of focal length 8 cm? draw the ray diagram and discuss the obtain result
Answers
The image is formed 8cm in front of the lens and is a real image.
What is the nature of the image?We would have to remind ourselves that if we are looking at the lens then we have to be looking at any reflecting surface that we know. There are two kinds of lens that we have, we have the concave and the convex lens.
We know that the focal length of the convex lens is positive thus we have;
1/f = 1/u + 1/v
f = focal length
u = object distance
v = image distance
Thus;
1/8 = 1/4 - 1/v
1/v = 1/4 - 1/8
v = (0.25 - 0.125)^-1
v = 8 cm
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Scientists monitor the ozone layer by taking air samples by airplane or weather balloons. What atmospheric layer do the scientists collect the ozone samples from?
Answers
Scientists typically collect ozone samples from the stratosphere, which is the atmospheric layer located between about 10 and 50 kilometers (6 to 30 miles) above the Earth's surface.
What is the stratosphere?The stratosphere is the layer of the Earth's atmosphere located above the troposphere and below the mesosphere. It extends from about 10 kilometers (6 miles) to about 50 kilometers (30 miles) above the Earth's surface.
The stratosphere is characterized by a gradual increase in temperature with altitude, due to the absorption of ultraviolet radiation by ozone in the stratosphere.
This is where most of the Earth's ozone is found and where the ozone layer is located. The ozone layer absorbs harmful ultraviolet (UV) radiation from the sun, protecting life on Earth from its harmful effects. Scientists collect air samples from this layer using airplanes or weather balloons equipped with specialized instruments.
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Compute the speed of sound waves in air at room temperature (T=200C) and find the range of wavelengths in air to which the human ear (which can hear frequencies in the range of 20 – 20,000Hz) is sensitive. The mean molar mass of air (a mixture of principally nitrogen and oxygen) is 28.8 x 10-3kg/mol and the ratio of heat capacity is ϒ = 1.40.
Answers
The speed of sound waves in air at room temperature T=20° is 344.035 m/s.
The range of wavelength in air to which the human ear (which can hear frequencies in the range of 20 – 20,000Hz) is sensitive is 17.20 m to 0.0172 m.
What is wavelength?The wavelength is the distance between the adjacent crest or trough of the sinusoidal wave. The wavelength is the reciprocal of the frequency of the wave.
Wavelength λ = c/f
where c is the speed of sound wave.
Given the room temperature T = 20 +273 = 293K
The velocity of sound wave is given by
v = √(γRT/m)
where γ =1.4 , m = 28.8×10⁻³ kg/mol R = 8.31 J/K.mol
Substituting the values, we get
v = 344.035 m/s
Thus, the speed of sound wave is 344.035 m/s
The human ear can hear frequencies in the range of 20 – 20,000Hz.
The wavelength corresponding to 20Hz is
λ = c/f
λ = 344.035 /20
λ = 17.20 m
The wavelength corresponding to 20,000Hz is
λ = 344.035 /20000
λ = 0.0172 m
Thus, the range of wavelength is 17.20 m to 0.0172 m sensitive to human ear.
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Please help I don’t know how to do this
Answers
Answer:
3.176 hoursExplanation:
given:
distance = 270 km
speed = 85 km/h
find:
how long does it take to get into his audition in hours?
solution:
velocity = distance / time
85 km/h = 270 km
t
85 (t) = 270
t = 270 / 85
t = 3.176 hours
A thin half ring with a radius of R = 10 cm is uniformly charged with a linear density of = 1 Mikrokulon/m and located in a vacuum. Determine the force F of interaction between the half ring and a point charge q = 20 nC located at the center of curvature. (don't use chatgpt please)
Answers
Answer:
Explanation:
F = k * q * lambda * R * π * (1 - √2/2)
Substituting the given values of q, lambda, R, and k, we get:
F = (9 x 10^9 N*m^2/C^2) * (20 x 10^-9 C) * (1 x 10^-6 C/m) * (0.1 m) * π * (1 - √2/2)
F ≈ 8.58 x 10^-4 N
Therefore, the force of interaction between the half ring and the point charge is approximately 8.58 x 10^-4 N.
The first human-made satellite, Sputnik I, had a mass of 83.4 kg and a momentum with a magnitude of 660,730 kg·m/s. What was the satellite’s speed? Round your answer to the nearest whole number.
Answers
The satellite’s speed is 7922.4 m / s if the Sputnik I, had a mass of 83.4 kg and a momentum with a magnitude of 660,730 kg·m/s.
p = m v
p = Momentum
m = Mass
v = Velocity
m = 83.4 kg
p = 660730 kg m / s
v = p / m
v = 660730 / 83.4
v = 7922.4 m / s
Momentum can be described as a mass in motion. It is the product of the object's mass and its velocity. It can also be described as the power held by a moving body that it can exert on another body.
Therefore, the satellite’s speed is 7922.4 m / s
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A particle accelerator has a circumference of 23 km. Inside it protons are accelerated to a speed of 0.999999972c. What is the circumference of the accelerator in the frame of reference of the protons?
Answers
This is related to length contractive, so:
\(\begin{gathered} L=L_o\sqrt{1-\frac{v^2}{c^2}} \\ so: \\ L=23000\sqrt{1-(0.999999972)^2} \\ L\approx5.4m \end{gathered}\)Answer:
5.4 m
Why are some areas in Europe seeing a partial solar eclipse while others are observing a total solar eclipse?
plz answer ASAP
Answers
Answer:
Objects between the source and observer produce possible shadows known as the umbra and the penumbra.
The umbra is a totally shadowed area, no light travels directly from the source to the observer.
The penumbra is a partially shadowed are where some of the source light travels directly to the observer an some of the source light is blocked from the observer (the object blocking the light is not a point object).
The question apparently refers to the differences seen by the observers.
Which of the following is a disadvantage of hybridization? 1.offspring are genetic copies of the parent 2.offspring are stronger and larger than the parents 3.offspring have a combination of traits from both parents 4.offspring often have health problems and are sterile
Answers
Answer:
Explanation:
4 is right
**WILL MARK BRAINLIEST IF CORRECT**
The wavelength of light released from a hydrogen atom depends on the
Select one:
a.
excited state and ground state of an electron.
b.
proton to neutron ratio of the nucleus.
c.
the number of electrons the hydrogen atom has.
d.
type of filter being used to view the light.
Answers
Answer:
a
Explanation:
Two train 75 km apart approach each other on parallel tracks, each moving at
15km/h. A bird flies back and forth between the trains at 20km/h until the trains pass
each other. How far does the bird fly?
Answers
Answer:
The correct solution is "37.5 km".
Explanation:
Given:
Distance between the trains,
d = 75 km
Speed of each train,
= 15 km/h
The relative speed will be:
= \(15 + (-15)\)
= \(30 \ km/h\)
The speed of the bird,
V = 15 km/h
Now,
The time taken to meet will be:
\(t=\frac{Distance}{Relative \ speed}\)
\(=\frac{75}{30}\)
\(=2.5 \ h\)
hence,
The distance travelled by the bird in 2.5 h will be:
⇒ \(D = V t\)
\(=15\times 2.5\)
\(=37.5 \ km\)
A soccer ball takes 20 s to roll 10 m. What is the average speed of the soccer ball?
Answers
Answer:
0,5 m/s²
Explanation:
v = d /t
v = 10 / 20
v = 0,5 m/s²
The velocity of the ball is 0,5 m/s²Hi! Let's see.
TOPIC: Uniform Rectilinear Motion.Explanation:
Data:
Distance(d) = 10 mTime(t) = 20 sSpeed(v) = ?==================================================================
Use speed formula in URM:
\(\boxed{\boxed{\bold{v=\frac{d}{t}}}}\)Replace with the data:
\(\boxed{v=\frac{10m}{20s}}}}\)It divides:
\(\boxed{\bold{v=0.5\frac{m}{s}}}\)Answer: The average speed of the soccer ball is 0.5m/s. (meters per seconds)
Cordially Alejanndraax. Greetings!
Food manufacturers create fats by adding hydrogen to fats?
Answers
True, Food manufacturers create fats by adding hydrogen to fats.
What is hydrogenation?Hydrogenation is used in the oil industry in making trans fats or margarine by increasing the melting point through reducing the carbon-to-carbon double bonds..
During hydrogenation, unsaturated fats undergo a chemical reaction in the presence of hydrogen gas and a catalyst, typically nickel.
The process involves the addition of hydrogen atoms to the carbon double bonds in the fatty acid molecules, resulting in the conversion of some of the double bonds into single bonds.
This reduces the number of unsaturated bonds in the fat, making it more saturated.
So we can conclude that the statement is true.
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The resultant of three vectors is 90.00 cm 34o N of W. If two of these three vectors are 17.89 cm 27o W of S, and 36.00 cm NW, what is the magnitude and direction of the third vector? (Ans: 57.85 cm, 44.76o N of W)
Answers
Answer:
Magnitude of the third vector: 57.85 cm
The direction of the third vector: 44.76 N of W
Explanation: