on a see-saw in a playground, two kids are sitting on opposite sides of the fulcrum (support). fulcrum is 0 (zero) meters. one child is sitting at 1.0 m on the left of fulcrum and has a mass of 30. kg. another child , sitting on the right side at 1.5 m, is able to balance the system. what is the mass of the child sitting on the right side, for the see-saw to be balanced?
Answers
The mass of the child sitting on the right side should be 20 kg for the see-saw to be balanced.
To balance the see-saw, the torques on both sides of the fulcrum need to be equal.
Torque is given by the formula:
Torque = Force x Distance
In this case, we can assume that the see-saw is balanced horizontally, so the forces on both sides are equal in magnitude and opposite in direction.
In this case, we can assume that the see-saw is balanced horizontally, so the forces on both sides are equal in magnitude and opposite in direction.
Let's represent the mass of the child on the right side with "m".
The torque on the left side is given by:
\(Torque_left = Force_left x Distance_left= mg(1.5 m)\)
The torque on the right side is given by:
\(Torque_right = Force_right x Distance_right= (30 kg)g(1.0 m)\)
Since the see-saw is balanced, Torque_left = Torque_right:
\(mg(1.5 m) = (30 kg)g(1.0 m)\)
Simplifying and solving for "m", we get:
\(m = (30 kg)*(1.0 m) / (1.5 m)m = 20 kg\)
To know more about Torque here
https://brainly.com/question/28220969
#SPJ4
Related Questions
A basketball is thrown horizontally with an initial speed of 3 m/s. a straight line drawn from the release point to the landing point makes an angle of 30.0 degrees with the horizontal. what was the release height?
Answers
The release height of the basketball is 0.05 m.
Projectile motion is a form of movement skilled by way of an item or particle that is projected in a gravitational area, which includes from Earth's floor, and actions alongside a curved route below the movement of gravity most effective.
Projectile motion is the motion of an item thrown (projected) into the air. After the initial force that launches the object, it best experiences the pressure of gravity. The item is known as a projectile, and its course is known as its trajectory.
The course of a projectile is parabolic. for the duration of the movement, the acceleration of the projectile is regular and acts vertically downwards being equal to g. The angular momentum of projectile = mu cos Θ × h wherein the price of h denotes the height.
calculation:-
angle with vertical = 30°
So, the angle with the vertical = 60°
horizontal velocity = 3 cos 30° m/s
vertical velocity = 3 sin 30° m/s = 2 × 1/2
= 1 m/s
For height V² = U² -2aS
0 = 1² - 2 ×9.8 × S
S = 1/19.6
= 0.05 m
Learn more about Projectile motion here:-https://brainly.com/question/10680035
#SPJ4
what is the magnitude of the angular momentum of the asteroid about the earth just before the asteroid strikes the moon?
Answers
The Earth's rotation is slowed down as a result, although there is a slight price to pay. Due to the conservation of angular momentum, when the Earth's rotation slows down, something else must acquire angular momentum to compensate.
What magnitude of the angular momentum of the asteroid?The angular momentum of an asteroid is obtained from its rotation rate, which is shown by the period of its light curve, its shape.
Which is suggested by the amplitude of its light curve, and, whenever possible, its size, which is indicated by polarimetry or radiometry.
However, if there are no external torques, a fundamental principle of physics states that energy and angular momentum are preserved.
Therefore, The moon is therefore traveling away from the Earth while gaining energy and angular momentum.
Learn more about angular momentum here:
https://brainly.com/question/29563080
#SPJ1
the universe is thought to be on the order of ________ billion years old a) 0.37. b) 3.7. c) 13.7. d) 137. e) 1370.
Answers
The age of the universe is estimated to be approximately 13.7 billion years, making option (c) the correct answer. This age is derived from various cosmological observations and measurements.
To estimate the age of the universe:
1. Scientists use various methods, including observations and measurements, to gather data about the universe.
2. One important piece of evidence is the cosmic microwave background radiation, which is a faint glow left over from the early stages of the universe.
3. By studying this radiation, scientists can determine the expansion rate of the universe.
4. Another method involves measuring the ages of the oldest known celestial objects, such as globular clusters or white dwarf stars.
5. By analyzing the chemical composition, temperature, and other characteristics of these objects, scientists can estimate their age.
6. Combining these measurements and observations, scientists have determined that the age of the universe is approximately 13.7 billion years.
7. This value is widely accepted in the scientific community and is considered the best estimate based on current knowledge and understanding of the universe.
Learn more about radiation here
https://brainly.com/question/31106159?
#SPJ11
he higher the relative humidity, the __________ vapor pressure gradient between the skin and the environment.
Answers
The higher the relative humidity, the lower the vapor pressure gradient between the skin and the environment.
The relative humidity is a measure of the amount of moisture in the air compared to the maximum amount it can hold at a specific temperature. When the relative humidity is high, it means the air is already saturated with moisture, leaving less room for additional evaporation. As a result, the vapor pressure gradient between the skin and the environment decreases. In other words, there is less of a driving force for moisture to evaporate from the skin into the surrounding air. Conversely, when the relative humidity is low, the air has a greater capacity to hold moisture, creating a larger vapor pressure gradient and promoting faster evaporation from the skin.
Learn more about vapor pressure here:
https://brainly.com/question/29640321
#SPJ11
True or false Condensation occurs with the removal of thermal energy.
Answers
true. condensation is when gas converts to liquid. the molecules move slower because of a loss of thermal energy, so it forms liquid
Suppose you now grab the edge of the wheel with your hand, stopping it from spinning. What happens to the merry-go-round?.
Answers
If you were to grab the edge of the spinning wheel on a merry-go-round, it would cause the entire ride to slow down and eventually come to a stop. This is because the momentum of the spinning wheel, which is connected to the entire ride, is suddenly stopped by your hand.
The rest of the ride can't keep moving at the same speed because it's all connected and the momentum is lost.
It's important to note that stopping the spinning wheel can be dangerous, as the sudden stop can cause anyone on the ride to be thrown off or injured. It's important to follow all safety guidelines and not attempt to stop the ride on your own.
In addition, if the spinning wheel is part of the mechanism that powers the ride, stopping it could cause the entire ride to shut down or malfunction. In general, it's best to leave the operation and maintenance of amusement park rides to trained professionals.
To know more about momentum visit :
https://brainly.com/question/30677308
#SPJ11
A windshield hits a bug with force of 10 N.
What force does the bug hit the windshield?
Explain using Newton's third law.
Answers
A periodic composite signal with a bandwidth of 2000 Hz is composed of two sine waves. The first one has a frequency of 100 Hz with maximum amplitude of 20 V; the second one has maximum amplitude of 5 V. Draw the frequency domain graph.
Answers
The frequency domain graph of the periodic composite signal consists of two peaks, one at 100 Hz with an amplitude of 20 V and another at an unknown frequency with an amplitude of 5 V.
In the frequency domain, the composite signal can be represented by a graph showing the amplitude of each frequency component present in the signal. In this case, the signal is composed of two sine waves. The first sine wave has a frequency of 100 Hz and a maximum amplitude of 20 V. This means that in the frequency domain graph, there will be a peak at 100 Hz with an amplitude of 20 V.
The second sine wave's frequency is not given, but we know that it has a maximum amplitude of 5 V. Therefore, there will be another peak in the frequency domain graph at an unknown frequency with an amplitude of 5 V.
Since the bandwidth of the composite signal is 2000 Hz, the frequency domain graph will span a range of frequencies from 0 Hz to 2000 Hz. Apart from the two peaks mentioned above, there will be no other significant frequency components in the graph.
To summarize, the frequency domain graph of the periodic composite signal will have two peaks—one at 100 Hz with an amplitude of 20 V, and another at an unknown frequency with an amplitude of 5 V.
Learn more about periodic composite
brainly.com/question/33440456
#SPJ11
If a wave with a wavelength of 6.011E-4 m travels 199.0 m in 2.711E-3 s, what is its frequency?
Answers
Answer:
erica mitch j sta. maria
This glass of lemonade is sitting in the hot summer sun. As time passes, in which direction will heat transfer take place?
ОА.
ice
lemonade
B.
lemonade -- air
. C.
air
lemonade
D.
ice - straw
E.
ice - air
Answers
Answer:
it A.
Explanation:
did the test on Edmentum and got it right
the energy driving the global water cycle is provided by the energy driving the global water cycle is provided by tides. wind. rotation of the earth on its axis. solar energy.
Answers
The energy driving the global water cycle is primarily provided by solar energy.
The Sun's energy heats the Earth's surface, causing water to evaporate from the surface and form water vapor in the atmosphere.
This water vapor then condenses to form clouds and precipitation, which returns water to the surface and completes the water cycle. Solar energy is the primary driver of temperature differences across the Earth's surface, which in turn creates atmospheric circulation patterns that distribute heat and moisture. Tides are a result of the gravitational forces of the Moon and Sun on the Earth's oceans, and wind is a result of atmospheric pressure differences caused by uneven heating of the Earth's surface. While tides and wind can affect the distribution and movement of water in the oceans and atmosphere, they are not the primary source of energy driving the global water cycle.
Learn more about energy here:
https://brainly.com/question/29071039
#SPJ4
1. If the angle of the ramp were increased from 30˙ to 45˙, how would this change the weight of the box? Explain.
2.If the angle of the ramp were increased from 30˙ to 45˙, how would this change the weight of the box? Explain.
Answers
When the angle of the ramp increases, the weight of the box acting perpendicular to the ramp decreases.
Normal reaction of the boxThe normal reaction of the box is due to weight of the box acting perpendicular to the ramp.
Fn = Wcosθ
when the angle of the ramp = 30⁰Fn = Wcos(30)
Fn = 0.866W
when the angle of the ramp = 45⁰Fn = W x cos(45)
Fn = 0.7071W
Thus, when the angle of the ramp increases, the weight of the box acting perpendicular to the ramp decreases.
Learn more about normal reaction here: https://brainly.com/question/18292235
#SPJ1
How many significant digits are in the number 0.010?
Answers
explanation:
Trailing zeros after a decimal point count if preceded by a non-zero value. Example: 0.01 one significant figure, 0.010 two significant figures, 0.0100 three significant figures.
distance between one point in a wave and the nearest point just like it
Answers
The distance between one point in a wave and the nearest point just like it is called the wavelength.
In other words, wavelength is the distance between two consecutive crests or troughs of a wave. It is usually represented by the Greek letter lambda (λ).
The wavelength of a wave depends on the frequency and the velocity of the wave. Frequency refers to the number of waves that pass a given point in a given amount of time. Velocity, on the other hand, refers to the speed at which the wave travels. The relationship between wavelength, frequency, and velocity is given by the formula λ = v/f, where λ is wavelength, v is velocity, and f is frequency.
Wavelength is an important characteristic of waves and is used to classify them. For example, radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays all have different wavelengths and frequencies. The study of the properties and behavior of waves is called wave mechanics, and it has important applications in fields such as physics, engineering, and telecommunications.
To know more about wave visit
https://brainly.com/question/31228436
#SPJ11
Demonstrate that the minimum size of an octahedral hole for a face centered cubic lattice comprised of anions is 0.41r_where r- is the radius of the anion.
Answers
In a face-centered cubic (FCC) lattice, the arrangement of cations is such that they occupy the octahedral holes between the anions. To determine the minimum size of an octahedral hole, we can consider the arrangement of anions in the FCC lattice.
In an FCC lattice, each anion is surrounded by 4 nearest neighboring anions in the same plane and 4 nearest neighboring anions in the adjacent planes. These neighboring anions form a regular tetrahedron around each central anion.
Let's consider one of these tetrahedra. The vertices of the tetrahedron are at the centers of the neighboring anions, and the central anion is located at the center of the tetrahedron. The distance from the central anion to any of the vertices of the tetrahedron can be taken as the radius of the anion (r-).
Now, if we draw lines connecting the central anion to the midpoints of the edges of the tetrahedron, we form an octahedron. The octahedron represents the octahedral hole in the FCC lattice.
The minimum size of the octahedral hole can be determined by considering the smallest possible distance between the central anion and the midpoints of the edges of the tetrahedron. This occurs when the central anion is in contact with the neighboring anions at the midpoints of the edges.
In an equilateral tetrahedron, the distance from the center to the midpoint of an edge is equal to 0.41 times the edge length. Since the edge length of the tetrahedron is equal to twice the radius of the anion (2r-), the minimum size of the octahedral hole is given by:
0.41 * (2r-) = 0.82r-
Therefore, we can conclude that the minimum size of an octahedral hole in a face-centered cubic lattice comprised of anions is 0.82 times the radius of the anion (0.82r-).
Learn more about octahedron here:
https://brainly.com/question/29310882
#SPJ11
What is the answer for the first part of a? In kN
Answers
We are asked to determine the magnitude of the force that acts parallel to the nail. To do that we will add the torque that acts on the point of contact. First, we draw a free-body diagram of the situation:
We have decomposed the force of the nail into its horizontal and vertical components. The horizontal component does no torque since there is no distance parallel to the force to the point of contact.
Now, we add the torques. We consider counterclockwise as positive:
\(\Sigma T=-(30cm)F+(5cm)(R_y)\)Since we consider the moment before there is no angular acceleration the sum of torques adds up to zero:
\(-(30cm)F+(5cm)(R_y)=0\)Now, we determine the value of Ry as a function of "R" using the trigonometric function cosine:
\(\cos \theta=\frac{R_y}{R}\)Now, we multiply both sides by "R":
\(R\cos \theta=R_y\)Now, we substitute in the sum of torques:
\(-(30cm)F+(5cm)(R\cos \theta_{})=0\)Now, we solve for "R". First, we add "30F" to both sides:
\((5cm)(R\cos \theta)=(30cm)F\)Now, we divide both sides by 5cm:
\((R\cos \theta)=\frac{(30cm)F}{5cm}\)Now, we divide both sides by cosine:
\(R=\frac{(30cm)F}{5cm\cos \theta}\)Now, we substitute the values:
\(R=\frac{(30cm)(155N)}{(5cm)\cos 26.9}\)Solving the operations:
\(R=1042.8N\)Therefore, the force on the nail is 1042.8 Newtons.
How are period and frequency related to each other?
A. Period is half the frequency
B. Period is twice the frequency
C. Period is equal to frequency
D. Period is the reciprocal of frequency
E. Period is the day root of frequency
Answers
Answer:
D
Explanation:
this is because the formula for frequency is
f = 1/T
and it is a reciprocal
What words go in the missing blanks?
An object with less ____ and ____. Will be easier to move.
Answers
A bar magnet that holds a chain of nails illustrates
a. magnetic induction b. magnetic field displacement c. electromagnetic induction.
Answers
A bar magnet that holds a chain of nails illustrates "a. magnetic induction."
Magnetic induction occurs when a magnetic field induces magnetism in a nearby material. In this case, the magnetic field produced by the bar magnet induces magnetism in the nails, causing them to become temporarily magnetized and stick to the magnet. This is due to the alignment of the magnetic domains in the nails with the magnetic field of the bar magnet, creating an attraction force between them. This phenomenon is also known as ferromagnetism, which is the ability of certain materials to become magnetized in the presence of a magnetic field.
A magnetic field is the area surrounding a magnet where its magnetic force is exerted. In this scenario, the bar magnet produces a magnetic field that affects the nails. Magnetic induction refers to the process where a magnet's magnetic field induces magnetism in nearby ferromagnetic materials, such as the nails. As a result, the nails become temporarily magnetized and attract each other, forming a chain.
Learn more about "magnetic induction":
https://brainly.com/question/14795050
#SPJ11
Cleo stated that light travels through air in straight paths, and when it moves from air to water, light changes direction, speeds up, and bends toward the normal.
Which statement best describes Cleo’s mistake?
A. Light travels through air and water in angled, scattered paths.
B. Light does not change direction when it moves from air into water.
C. Light slows down when it moves from air into water.
D. Light bends away from the normal when it moves from air into water.
Answers
Answer:
light bends away from the normal when it moves from air into water-refraction
Answer: C.) Light slows down when it moves from air into water.
Explanation: i hope this helps :)
1. Magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity is called
a. magnetic flux
b. magnetic field intensity
c. magnetic induction
d. self-inductance
Answers
Magnetic Flux is the magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity
What does magnetic flux depend on ?The magnetic flux or field lines linking a coil depends on;
The magnetic field strengthThe number of turns of the coilThe area of each turnAccording to the question, the Magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity is called magnetic flux
To obtain a large induced electromotive force, we cause a coil of many turns to move at a high speed across a strong magnetic field.
According to Faraday's law, which state that whenever there is a change in the magnetic lines of force, an electromotive force is induced, the strength of which is proportional to the rate of change of the flux linked with the circuit.
Therefore, Magnetic Flux is the magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity
Learn more about Magnetic Flux here: https://brainly.com/question/16234377
#SPJ1
Tujuan kita membuat bermacam macam arah dan bentuk garis dalam dalam menggambar adalah ...... A.agar gambar kita bagus B.agar tangan lentur dalam menggambar terlihat lebih bagus C.mengisi waktu kosong
Answers
Answer:
A.agar gambar kita bagus
Explanation:
semoga membantu
based on the knowledge you gained from the video and the data that you’ve seen, what do you think is creating the data that kepler gathered? explain your answer
https://youtu.be/gypAjPp6eps
Answers
The telescope created the data gathered by Kepler and his team.
What is a star?
A star is a large luminous astronomical body which produces light and heat energy as well as radiation.
There are billions of stars in the universe organized into galaxies.
The Sun is the star of our solar system.
The Kepler project produced a wide range of data products and documentation to assist the community in using data from the mission to help study both exoplanets and other astrophysical areas.
In the video, a mysterious star was observed which is 50 percent bigger and 1,000 degrees hotter than the Sun.
By mean of telescopes, it was observed that the dimming seen in the diet was dues to dust particles.
These data produced ranges from engineering data on the detectors to lists of planet candidates and includes many of the intermediate data products in the data processing path.
The Kepler first mission came to an end after four years when two of the four reaction wheels, used to point the spacecraft malfunctioned.
Learn more about stars at: brainly.com/question/25880445
#SPJ1
Your bike starts with an initial velocity of 1 m/s and you accelerate to 4 m/s in 6 seconds. How far did you travel while accelerating?
Answers
Answer:
78 m
Explanation:
Initial v = 1 m/s
a = 4 m/s²
t = 6s
\(x = v_{i} t + \frac{1}{2}at^{2} \\x = (1)(6) + \frac{1}{2} (4)(6)^{2} \\x = 6 + 72\\x = 78\)
pls help me i’m begging u
Answers
Answer:
First one: False. Second one: decrease. Third one: decreased
Explanation:
For the first one, potato chips will make the floor more slippery than just regular tile. Second one, if the force holding the 2 things together decreases, the friction will decrease as well. For the third one, if water is over the floor, it makes it even more slippery.
Hope this helps!
Answer:
1:False 2:Decrease 3:Decrease
a force of 5N and 3N are simultaneously exerted on an object .The direction of the forces can be altered at will.When will these forces have their greatest resultant?
Answers
Answer:
When the both the forces are acting in the same direction
Explanation:
Answer:
The resultant of these two forces will be the greatest when the two forces are in the same direction.
Explanation:
Let \(F_1\) and \(F_2\) denote these two forces. The resultant of these two force would be the vector sum \((F_1 + F_2)\).
Refer to the diagram attached. Join the head of \(F_1\) to the tail of \(F_2\). Under this construction, the vector connecting the tail of \(F_1\!\) to the head of \(F_2\!\) (the vector shown with a lighter color) would represent the resultant vector \((F_1 + F_2)\).
Consider the triangle inequality: as long as \(F_1\) and \(F_2\) (the first two sides of the triangle in the diagram) are not parallel to one another, the magnitude of the resultant vector would always be smaller than the sum of the magnitude of \(F_1\!\) and that of \(F_2\!\).
In other words: \(\| F_1 + F_2 \| < \| F_1 \| + \| F_2 \|\).
However, notice that when \(F_1\) and \(F_2\) are in the same direction, the three sides \(F_1\!\), \(F_2\!\), and \((F_1 + F_2)\) are in the same line and no longer form a triangle.
On the other hand, if \(F_1\) and \(F_2\) are opposite to one another, \(\| F_1 + F_2 \| = \| F_1 \| - \| F_2 \|\).
The magnitudes of the two forces, \(\| F_1 \| = 5\; \rm N\) and \(\| F_2 \|= 3\; \rm N\), are fixed. Hence, when the two forces are in the same direction, \(\| F_1 + F_2 \| = \| F_1 \| + \| F_2 \| =8\; \rm N\).
As long as \(F_1\) and \(F_2\) are not in the same line, the triangle inequality ensures that \(\| F_1 + F_2 \| < \| F_1 \| + \| F_2 \| =8\; \rm N\).
Hence, \(8 \rm \; N\) would be the greatest magnitude that the resultant force could achieve. That value is reached when the two forces are in the same direction.
True or false question scientists can predict when an earthquake will occur
Answers
Answer:
False
Explanation:
Neither the USGS nor any other scientists have ever predicted a major earthquake. USGS scientists can only calculate the probability that a significant earthquake will occur in a specific area within a certain number of years.
please ans both urgent
Answers
Answer:
d I guess not sure
b if down I guess
Explanation:
if worng then plz dont say anything as I am not sure about the ans
10. A student walking in the hallway sees a spill. When this happens, they slow down from 8.3 ft/s to a pace of 3.3 ft/s in 4 seconds. What is their acceleration?
Answers
Answer:
Acceleration = -1.33ft/s²
Explanation:
Given the following data;
Initial velocity = 3.3ft/s
Final velocity = 3.3ft/s
Time, t = 4s
To find the acceleration;
In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.
This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.
Mathematically, acceleration is given by the equation;
\(Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}\)
Where,
a is acceleration measured in \(ms^{-2}\)v and u is final and initial velocity respectively, measured in \(ms^{-1}\)t is time measured in seconds.Substituting into the equation, we have;
\(a = \frac{3.3 - 8.3}{4}\)
\(a = \frac{-5.3}{4}\)
Acceleration = -1.33ft/s²
The value is negative because the final velocity is lesser than the initial velocity i.e the student is decelerating.
What is important when it comes to winning
Answers
Answer:
satisfaction, enjoyment and fair play
Answer:
It is important to be a good sport, and even if you do not win still be happy about being able to participate, and congratulate the person that did win.
Explanation:
Hope this helped Bye!