Answer:
a) The angular speed of the child is approximately 1.257 rad/s
b) The angular speed of the teenager is approximately 1.257 rad/s
c) The tangential speed of the child is approximately 1.257 m/s
d) For the child, r = 2 m
The tangential speed of the teenager is approximately 2.513 m/s
Explanation:
The revolutions per minute, r.p.m. of the merry-go-round = 1 revolution/(5 s)
The radius of the merry-go-round = 2 m
The location of the child = 1 m from the axis
The location of the teenager = 2 m from the axis
1 revolution = 2·π radians
Therefore, we have;
The angular speed, ω = (Angle turned)/(Time elapsed) = (2·π radians)/(5 s)
∴ The angular speed of the merry-go-round, ω = 2·π/5 radians/second
a) The angular speed of the child = The angular speed of the merry-go-round = 2·π/5 radians/second ≈ 1.257 rad/s
b) The angular speed of the teenager = The angular speed of the merry-go-round = 2·π/5 radians/second ≈ 1.257 rad/s
c) The tangential speed, v = r × The angular speed, ω
Where;
r = The radius of rotation of the object
For the child, r = 1 m
The tangential speed of the child = 1 m × 2·π/5 radians/second = 2·π/5 m/s ≈ 1.257 m/s
d) For the child, r = 2 m
The tangential speed of the teenager = 2 m × 2·π/5 radians/second = 4·π/5 m/s ≈ 2.513 m/s
1. How does speed affect the amount of kinetic energy in a moving object? Explain how you
know by stating your claim, the evidence for your claim, and your reason why this evidence
supports your claim.
I’ll mark as brainliest
Explanation:
The kinetic energy of a moving object is directly proportional to its mass and directly proportional to the square of its velocity. This means that an object with twice the mass and equal speed will have twice the kinetic energy while an object with equal mass and twice the speed will have quadruple the kinetic energy.
The histogram shows final exam scores, and the table shows letter grades for each range of scores. A passing grade is 60% or higher.
A 90–100%
B 80–90%
C 70–80%
D 60–70%
Which statement is supported by the data in the histogram?
A. Twenty students received As and Bs.
B. Forty students received scores between 40% and 60%.
C. Most students received As and Bs.
D. Most students passed the final exam.
Answer:
D
Explanation:
Edg2020
A box is pulled to the right with a force of 65 N at an angle of 58 degrees to the horizontal. The surface is frictionless. The free-body diagram is shown. What is the net force in the x-direction?
What property of light waves makes it possible to use waves to transmit information between a space shuttle and NASA mission control centers on the ground?
Answer:
Explanation: Because it was able to exhibit an electromagnetic property hence, it is transverse meaning that
each wave is perpendicular to the direction of propagation.
And recall that an Electromagnetic waves can travel through a vacuum.
Ms. Lachance has to pick up her daughter from the airport and is running late. As she pulls her car out of the driveway and starts to drive down the road, she takes off as fast as her car will go. When she does this her coffee cup, which she left on the hood by accident flies into the windshield making it hard for her to see. Using Newton’s first law, explain why the coffee spilt all over the windshield.
Answer:
the gravity was pulling the cup to the front of the window even though the wind was pushing it the other way.
Explanation: the gravity must be strong
By using the Newton's first law of Motion, it can be explained why the coffee spilt all over the windshield. This is because there is gravitational force which acts upon it and it pushes the substances in the downward direction towards the Earth.
What is Newton's first law of motion?
Newton's first law of Motion states that a body remains in the same state of rest or uniform motion in a straight line unless and until an external force is applied on it. This means that a body will not start moving by itself until and unless an external force acts on it.
In this case, lachance's daughter is trying to pick her coffee cup, the coffee cup at the windshield is spilt which makes it difficult for her to see. This is because, there is the gravitational force or gravity which is pulling the coffee cup to the front of the window even though the wind was pushing it in the other way.
Learn More about Newton's law here:
https://brainly.com/question/15280051
#SPJ5
How do latitude and proximity to bodies of water relate to the temperature?
Answer:
The answer is below.
Explanation:
According to geographical coordinates and related information, when the latitude is lower, that is closer to the equator the temperature becomes warmer. While the far away from the equator the latitude is the temperature decreases.
Similarly, the water bodies have a relative effect that is considered little or less severe on the temperature throughout any of the seasonal period or day and night.
When will the human population stop growing?
Which of the following are true of the temperature absolute zero? (Select all that apply)
Group of answer choices
All atoms and molecules stop moving
It is equal to 0 Kelvin
All matter becomes gas
It is equal to -273 Celsius
Answer:
1 and 2
Explanation:
Answer:
Explanation:
Answer:
I have
Step-by-step explanation:
No idea i just need points sorry wyatt
The greenhouse effect is when the sun's heat is trapped in the atmosphere warming the earth. True or false
Answer:
True
Explanation:
I believe the answer is true.
(b) Pressure P
Pressure
= Force
Area
(c) Work Done, W
work done forex
displacement
ICS
Answer:
ed
Explanation:
In which type of mixture can different parts be seen?
A.) heterogeneous
B.) molecular
C.) compound
D.) homogeneous
Which of the following equations describes how voltage (V), current (I), and
resistance (R) are related?
A. V= IR
B. R= I/ V
C. R= VI
D. V= I/ R
Answer:The answer is B: RI/V
Explanation: Because V is divided by I and multiplied by R
Suppose a woman raises a 65 N object in 2m in 4 seconds.
Calculate the work is done and her power.
Science
Answer:
[tex]\huge\boxed{\sf P.E = 130\ Joules}[/tex]
[tex]\huge\boxed{\sf P = 32.5\ Watts}[/tex]
Explanation:
Given Data:
Weight = W = 65 N
Height = h = 2 m
Time = t = 4 secs
Required:
Power = P = ?
Work Done in the form of Potential Energy = P.E. = ?
Formula:
P.E. = Wh
P = P.E. / t
Solution:
P.E. = (65)(2)
P.E = 130 Joules
P = P.E. / t
P = 130 / 4
P = 32.5 Watts
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807Nuclear energy is currently used in which three kinds of vehicles?
A. cars, submarines, spacecraft
B. submarines, ships, spacecraft
C. spacecraft, airplanes, cars
D. airplanes, submarines, ships
Answer:
d
Explanation:
5.
A badminton shuttlecock leaves the racquet traveling 30 m/s. It goes over the net 0.5
seconds later with a speed of 10 m/s. Calculate its average acceleration.
Answer:
[tex]a=40\ m/s^2[/tex]
Explanation:
Given that,
Initial speed of a shuttlecock, u = 30 m/s
Final speed of the shuttlecock, v = 10 m/s
Time, t = 0.5 s
We need to find its average acceleration. The acceleration of an object is equal to the change in speed divided by time taken. It is given by :
[tex]a=\dfrac{v-u}{t}\\\\a=\dfrac{10-30}{0.5}\\\\a=-40\ m/s^2[/tex]
So, the average acceleration of badminton shuttlecock is [tex]40\ m/s^2[/tex].
can someone Please help
Answer:
22. 2 sec
23. 3 sec
24. 50 sec
Explanation:
J = (P)*(t)
t = J/P
22.
t = (80 J)/(40 W)
t = 2 s
23.
t = (2,700,000 J)/(900,000 W)
t = 3 s
24.
t = (10,000 J)/(200 W)
t = 50 s
**100 POINTS**
Suppose you have a balenced stick with 3 weights on one side and only 1 weight on the other side.What needs to happen on the side with less weight for the objects to be balanced?
A.Nothing.The objects cannot be balanced
B.Move the 1 weight closer to the center
C.Set the 1 weight 3 times the distance from the center as the weights on the other side
D.Set the 1 weight 6 times the distance from the center as the weights on the other side
Answer:
B
Explanation:
In 2019, the IUCN Red List reported approximately _____ species of in danger of disappearing from the wild.
Answer:
In 2019, the IUCN Red List reported approximately 28,000 species of in danger of disappearing from the wild.
Explanation:
The IUCN Red List is a glossary of animal and plant species that are in danger of extinction, dividing the severity of the danger into different colors where red is synonymous with those species in critical danger of disappearing.
The 2019 Red List showed that more than 28,000 species of animals, plants and other living beings are in a situation of critical danger, notable examples being the Iberian Lynx and the Bornean Orangutan, among many others.
A cricket can travel approximately 8 m/s. How many meters could a cricket travel in 75
s?
Answer:
Your answer will be 600meters
while flying a plane parallel to the ground a pilot releases a fuel tank in order to reduce the planes mass. what is the tanks final velocity after falling 10 m
La velocidad vertical del tanque después de caer 10 m es 14 m/seg .
La velocidad vertical del tanque se calcula mediante la aplicación de la fórmula de velocidad , la componente vertical Vfy, del movimiento horizontal como se muestra a continuación :
Vfy=?
h = 10 m
Fórmula de Velocidad vertical Vfy:
Vfy² = 2*g*h
Vfy= √(2*9.8m/seg2* 10m )
Vfy= 14 m/seg
pls help!!
Thanks =]
Answer:
i think 2 N right because the wheels have a bigger force so we will subtract both sides which is 2 and right is longer so its 2 N Right?
When you see an object that is not a light source, you are seeing light waves ___ by the object
A. reflected
B. absorbed
C. refracted
When was the Federation Internationale de Football Association ( F.I.F.A) founded ?
a - May 21, 1404
b - May 21, 1094
c - May 21, 1904
Answer:
c - May 21, 1904
Federation lnternational de Football Association was established on May 21, 1904
Explanation:
I hope it helps ❤❤Why can we say that the ratio of net force to mass is constant forany dropped object on Earth?
Answer:
All objects free fall at the same rate regardless of their mass. Because the 9.8 N/kg gravitational field at Earth's surface causes a 9.8 m/s/s acceleration of any object placed there, we often call this ratio the acceleration of gravity.
Explanation:
Newton's Second Law, if I remember right.
GIVING BRAINLIEST LOOK AT THE DIAGRAM AND AWNSER THE QUESTION
Which statement is best supported by the diagram?
Kinetic energy becomes potential energy between points R and S.
Maximum potential energy is at point P.
Maximum potential energy is at point R.
Potential energy becomes kinetic energy between points P and Q.
Answer:
Option D)Potential energy becomes kinetic energy between points P and Q.
Explanation:
Thanks for the help :)
I need it now aaaasssssaaaappp!!!!
A) Pitch depends on the frequency of a sound wave. The higher the pitch, the higher the frequency and the lower the pitch, the lower the frequency. Sound waves have different pitches due to varying frequency levels.
B) Sound is created as the pen vibrates. This vibrations also interacts with the air atoms and molecules, causing them to vibrate too, therefore, creating sound waves. The reason the brain grows annoyed at this continual sound is because the brain will focus on this sound only, causing the brain to go into overdrive, creating annoyance.
C) Sound waves are travelling vibrations of particles. Space does not have any atoms or particles for the sound vibrations to interact with, therefore creating zero sound waves to travel.
Hope this helps!! :))
Mass of 2 x 1021 number of atoms of a
element is 0.49. What is the mass of 0.5 mole of a b
element?
Answer: The mass of 0.5 mole of element ab is 81.67 g.
Explanation:
According to the mole concept, 1 mole of a substance contains [tex]6.022 \times 10^{22}[/tex]. As, the mass of [tex]2 \times 10^{21}[/tex] atoms is 0.49 g.
So, [tex]\frac{2 \times 10^{21}}{6.022 \times 10^{23}} mol = 0.49 g[/tex]
[tex]0.003 mol = 0.49 g[/tex]
Therefore, mass of 1 mole = [tex]\frac{0.49}{0.003}[/tex]
= 163.33 g/mol
Hence, mass of 0.5 mole of ab element is calculated as follows.
[tex]0.5 mol \times 163.33 g/mol[/tex]
= 81.67 g
Therefore, the mass of 0.5 mole of element ab is 81.67 g.
help pls i need this right now
Answer:
The x-component of [tex]F_{3}[/tex] is 56.148 newtons.
Explanation:
From 1st and 2nd Newton's Law we know that a system is at rest when net acceleration is zero. Then, the vectorial sum of the three forces must be equal to zero. That is:
[tex]\vec F_{1} + \vec F_{2} + \vec F_{3} = \vec O[/tex] (1)
Where:
[tex]\vec F_{1}[/tex], [tex]\vec F_{2}[/tex], [tex]\vec F_{3}[/tex] - External forces exerted on the ring, measured in newtons.
[tex]\vec O[/tex] - Vector zero, measured in newtons.
If we know that [tex]\vec F_{1} = (70.711,70.711)\,[N][/tex], [tex]\vec F_{2} = (-126.859, 46.173)\,[N][/tex], [tex]F_{3} = (F_{3,x},F_{3,y})[/tex] and [tex]\vec O = (0,0)\,[N][/tex], then we construct the following system of linear equations:
[tex]\Sigma F_{x} = 70.711\,N - 126.859\,N +F_{3,x} = 0\,N[/tex] (2)
[tex]\Sigma F_{y} = 70.711\,N + 46.173\,N+F_{3,y} = 0\,N[/tex] (3)
The solution of this system is:
[tex]F_{3,x} = 56.148\,N[/tex], [tex]F_{3,y} = -116.884\,N[/tex]
The x-component of [tex]F_{3}[/tex] is 56.148 newtons.
3. What is a manometer used to determine?
Answer:
It's used to indicate pressure