2. If, in the previous question, there is a 15 N kinetic frictional force opposing the motion, how much work is
done by the force of friction? Does friction do positive work or negative work on the block? Draw a free-body
diagram to support your answer.
Answers
Answer:
this answer your question
Related Questions
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?
Answers
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.
pls help!!
Thanks =]
Answers
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?
Suppose a woman raises a 65 N object in 2m in 4 seconds.
Calculate the work is done and her power.
Science
Answers
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!
~AH1807can someone Please help
Answers
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
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.
Answers
Answer:
D
Explanation:
Edg2020
Thanks for the help :)
Answers
**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
Answers
Answer:
B
Explanation:
3. What is a manometer used to determine?
Answers
Answer:
It's used to indicate pressure
Nuclear 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
Answers
Answer:
d
Explanation:
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
Answers
Answer:
c - May 21, 1904
Federation lnternational de Football Association was established on May 21, 1904
Explanation:
I hope it 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?
Answers
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.
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
Answers
Answer:The answer is B: RI/V
Explanation: Because V is divided by I and multiplied by R
Objects on Mars weigh about 38% what they do on Earth. While driving on Earth, a Mars rover moves at a speed of 30 mph. If the rover moves with the same speed on Mars, would it have more, less, or the same momentum as when on Earth
Answers
Answer:
The same momentum as when on Earth
Explanation:
From a background understanding of science, the mass of an object is constant irrespective of its location.
This implies that the rover has the same mass on the earth as on the moon.
Now, we shall determine the momentum of the rover on Earth and on the Mar.
For Earth:
Let the mass on Earth (Mₑ) = 1 kg
Velocity on Earth (Vₑ) = 30 mph = 30 × 0.447 = 13.41 m/s
Momentum on Earth (Mₒₑ) =?
Momentum = mass × velocity
Mₒₑ = Mₑ × Vₑ
Mₒₑ = 1 × 13.41
Mₒₑ = 13.41 Kgm/s
Thus the momentum of the rover on Earth is 13.41 Kgm/s
For Mar:
Mass on Mar (Mₘ) = Mass on Earth (Mₑ), since mass is constant.
Mass on Mar (Mₘ) = 1 kg
Velocity on Mar (Vₘ) = Velocity on Earth (Vₑ), since the rover move with the same velocity as described by the question.
Velocity on Mar (Vₘ) = 13.41 m/s
Momentum on Mar (Mₒₘ) =?
Momentum = mass × velocity
Mₒₘ = Mₘ × Vₘ
Mₒₘ = 1 × 13.41
Mₒₘ = 13.41 Kgm/s
Therefore, the momentum of the rover on Mar is 13.41 Kgm/s
Summary:
Momentum on Earth (Mₒₑ) = 13.41 Kgm/s
Momentum on Mar (Mₒₘ) = 13.41 Kgm/s
Thus, the rover will have the same momentum as when on earth
The momentum of the object on Mars will be the same as on Earth.
The given parameters;
speed of the object on Earth and Mars, v = 30 mphWeight is a vector quantity because it changes when acceleration due to gravity on the object changes while mass is scalar quantity, with a constant value in all places in the universe.
The momentum of an object is calculated as;
P = mv (kgm/.s)
Since the speed and mass of the object will be the same on both planets, the momentum will also be the same.
Thus, the momentum of the object on Mars will be the same as on Earth.
Learn more here:https://brainly.com/question/20728229
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?
Answers
I need it now aaaasssssaaaappp!!!!
Answers
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!! :))
A geothermal power station has a power output of 300 000 W. Calculate how many kWh of energy the power station would generate in 2 days.
Answers
Answer:
The energy the power station would generate in 2 days is 14,400 kW·h
Explanation:
The given parameter for the geothermal plant are;
The power output of the geothermal plant = 300,000 W = 300 kW
The duration for which the energy produced is calculated = 2 days
Therefore, we have;
The number of seconds in 2 days = 2 days × 24 hours/day × 60 min/hr × 60 seconds/min = 172,000 seconds
The number of hours within 2 days = 2 days × 24 hours/day = 48 hours
The energy generated, E = Power × Time the power is utilized
Therefore, the energy the power station would generate in 2 days, [tex]E_{2 \ days}[/tex], is given as follows;
[tex]E_{2 \ days}[/tex] = 300 kW × 48 hours = 14,400 kW·h
(b) Pressure P
Pressure
= Force
Area
(c) Work Done, W
work done forex
displacement
ICS
Answers
Answer:
ed
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.
Answers
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].
The greenhouse effect is when the sun's heat is trapped in the atmosphere warming the earth. True or false
Answers
Answer:
True
Explanation:
I believe the answer is true.
Can anyone answer my questions that I've asked?
Answers
Answer:
76 N north-east
Explanation:
V = √(44²+62²) = 76 N
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.
Answers
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
In 2019, the IUCN Red List reported approximately _____ species of in danger of disappearing from the wild.
Answers
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.
How do latitude and proximity to bodies of water relate to the temperature?
Answers
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.
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
Answers
Answer:
1 and 2
Explanation:
Answer:
Explanation:
Answer:
I have
Step-by-step explanation:
No idea i just need points sorry wyatt
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
Answers
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
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
Answers
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
Answers
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.
help pls i need this right now
Answers
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.
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.
Answers
Answer:
Option D)Potential energy becomes kinetic energy between points P and Q.
Explanation:
In which type of mixture can different parts be seen?
A.) heterogeneous
B.) molecular
C.) compound
D.) homogeneous