Answers
Third model shows how a comet's tail changes during its orbit...
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Related Questions
particle has 17.5 joules of kinetic energy and 12.5 joules of gravitational potential energy at one point during its fall from a tree to the ground. An instant before striking the ground, how much mechanical energy — rounded to the nearest joule — does the particle have?
Answers
Answer:
Em = 30 J
Explanation:
The principle of conservation of mass and energy is one of the most important in physics, it establishes that energy cannot be created just by transforming it.
Therefore, the mechanical energy at a point is the same throughout the movement, only in some parts it will be kinetic, in others potential and in the intermediate points a mixture of the two, but the total value is always the same.
Em = K + U
Em = 17.5 + 12.5
Em = 30.0 J
At the point just before touching the ground the mechanical energy is the same Em = 30 J
Encuentra la magnitud y dirección de la suma de los siguientes vectores: A= 7m al noreste B= 12m 50° al oeste del norte
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You push on 35 N object for 3 seconds. Find work.
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pleaaaaaaaaaaaaaaase help me vvvvvvvvvvvvvvv
Which one, mass or weight, would change if you were to travel to another planet or moon?
Answers
Answer:
The answer is weight.
Mass is constant, your mass, height and width won’t change. So that leaves weight.
why would a bouncing ball eventually stop bouncing?
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1. Friction
2. Gravity
3. Decrease in potential energy
The force of gravity pulls it down, and as the ball falls, its potential energy is converted to kinetic energy. When you drop the ball from a certain height, the potential difference is at its extreme point. When the ball hits the ground, the potential energy naturally decreases, which stops the ball from bouncing after a while.
In zero gravity, do the laws of motion still apply? No, objects cannot
be in
motion in
space because
there is no gravity.
No, if you do not
have gravity you
have no motion.
Yes, objects in
motion in space do
not have inertia.
Yes, objects in motio
in space tend to stay
motion unless acte
upon by an outside
force.
Answers
Answer:
Im pretty sure that it applys
How are reversibility, time, and entropy connected
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Answer:
As one goes "forward" in time, the second law of thermodynamics says, the entropy of an isolated system can increase, but not decrease. ... Thus, entropy measurement is a way of distinguishing the past from the future.
Explanation:
Two charges separated by one meter exert a 9 N force on each other. If the charges are pushed to a 3 meter separation, the force on each charge will be 3 N.
True or False?
Answers
Answer:
False
Explanation:
The formula of force that exists between two charges is expressed as;
F = kq1q2/r²
If two charges separated by one meter exert a 9 N force on each other, the;
9 = kq1q2/1²
9 = kq1q2 ..... 1
If the charges are pushed to a 3 meter separation, then;
F = kq1q2/3²
F = kq1q2/9 .... 2
Divide both equations;
9/F = (kq1q2)/ kq1q2/9
9/F = kq1q2 * 9/ kq1q2
9/F = 9
F = 9/9
F = 1N
Hence if the charges are pushed to a 3 meter separation, then the force on EACH charge will be 1N. Hence the answer is False
i need help asap
The downward force of gravity causes _______ displacement of an object, but the force of gravity does not affect the ________ component of motion.
a.
negative, horizontal
c.
negative, vertical
b.
positive, vertical
d.
None of the above.
Please select the best answer from the choices provided
A
B
C
D
Answers
Answer:
The correct answer is AExplanation:
I hope it helps ❤❤
Heat is an exchange of internal energy from one system to another due to
OA.
one system being liquid and the other being solid.
OB.
the systems having the same temperature.
OC.
one system being gas and the other being solid.
OD
a temperature difference between the systems.
Answers
Answer:
OD
Explanation:
2 bodies should have different temperatures for energy to be transferred
What is the charge of an electron and charge of neutron
Answers
Answer:
The charge of a neutron is 0
The charge of an electron is -1
Explanation:
Answer:
The charge of Neutrons is: 0
The charge of Electrons is: -1
Explanation:
Neutrons are uncharged and Electrons are negatively charged. The negative charge of one electron balances the positive charge of one proton. Both protons and neutrons have a mass of 1, while electrons have almost no mass.
How do you solve the resultant force and direction.
Answers
Answer:
To find the resultant force subtract the magnitude of the smaller force from the magnitude of the larger force. The direction of the resultant force is in the same direction as the larger force. A force of 5 N acts to the right, and a force of 3 N act to the left. Calculate the resultant force.A book is resting on a table. The table is raised on one end to an angle of 15° to the floor. If the book remains at rest, what keeps the book from sliding?
A. rolling friction
B. static friction
C. sliding friction
D. fluid friction
Answers
Answer: Static Friction
Explanation: As you tilt the book you know that it will stay fixed to start with, but eventually, once the angle is large enough, the book will start to slide. It is the static friction force that holds the book in place at small angles of tilt.
The book remains at rest if A book is resting on a table. The table is raised on one end to an angle of 15° to the floor due to static friction, so option C is correct.
What is static friction?An item is kept at rest by the force of static friction. The phrase "static friction" can be defined as "the friction people perceive when they attempt to move a stationary object on a surface, but without actually causing any relative motion between the body and the surface it is on."
You can predict that the book will initially remain fixed when you tilt it, but once the angle is sufficiently large, it will finally begin to slide. The book is held in place at slight tilt angles by static friction force.
The formula for the coefficient of static friction is μ = tan θ, here θ is the angle of inclination if the angle is bigger the friction force is more but at 90° when the book is vertical then the friction force will not work on the book
Therefore, the book remains at rest if A book is resting on a table. The table is raised on one end to an angle of 15° to the floor due to static friction.
To know more about static friction:
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Two magnets are held apart. Once released, the South Pole of one magnet moves toward the North Pole of another magnet until the magnets collide. How does the graph reflect the changes in energy that occur?
Answers
Answer:
Kinetic energy and velocity are at zero when the magnets are held apart, and both increase rapidly when they are released and move together. Energy stored in the magnetic field decreases.
Explanation:
easy
The increase in the kinetic energy occurs when both magnets are released.
Change in energy occurs between two magnets
The kinetic energy and velocity are at zero when the magnets are held apart from one another at a certain distance but the kinetic energy increases when they are released and move together so we can conclude that the increase in the kinetic energy occurs when both magnets are released.
Learn more about magnets here: https://brainly.com/question/14997726
A roller coaster car is at the top of a 65.0 m Crest. If the roller coaster car has 987000 J of potential energy what is its mass
Answers
M=Pe/(g*h)
M=987000/(9.807*65)
M= 157.8872 KG
what is refractive index ?
Answers
Explanation:
Refractive Index is a value calculated from the ratio of the speed of light in a vacuum to that in a second medium of greater density. The refractive index variable is most commonly symbolized by the letter ‘n’ or n’ in a descriptive text and mathematical equations.
prove that total mechanical energy is always constant
Answers
Explanation:
We know that the overall mechanical energy of a device stabilizes in the absence of any external force. We know that that the total of potential and kinetic of the freely velocity vector remains same. ,So mechanical energy of a body, underneath gravitation, remains constant.
Milk being heated on top of a stove will do what?
Group of answer choices
Expand
Contract
Stay the same
Answers
Hope this helps
Have a great day/night
what is the amount of time for one cycle to to occur
Answers
Period, being a time, is measured in units of time such as seconds, hours, days or years. The period of orbit for the Earth around the Sun is approximately 365 days; it takes 365 days for the Earth to complete a cycle
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Hope It Helps!
how does an ice cube cause hot coffee to become cool and through what heat transfer
Answers
What is a real world example of the Law of Conservation of Momentum?
Answers
Answer:
The thrust that you feel at the time of firing is one of the real-life example of the conseriation nomentum
Plz help me plzzz. I'm begging you
Answers
Answer:
a then c then b
Explanation:
What unit of time on Earth is based on the revolution of the Earth around the Sun?
A.
day
B.
hour
C.
year
D.
month
Answers
C.) Year
i hope this helped! please mark me as brainliest and 5 stars >:)
Answer:
I believe it's C. Year.
Explanation:
Hope this helps! ^^
A motorist is driving at a constant velocity of 28.0 m/s when he decides to pass a car is in front of him. He accelerates at a rate 2.50 m/s2 for 3.00 seconds while passing the car. What is his velocity at the end of the 3.00 seconds?
Answers
Answer:
Final velocity, V = 35.5m/s
Explanation:
Given the following data;
Initial velocity = 28m/s
Acceleration = 2.5m/s²
Time = 3 seconds
To find the final velocity, we would use the first equation of motion
V = U + at
Where;
V is the final velocity measured in m/s.
U is the initial velocity measured in m/s.
a is the acceleration measured in m/s².
t is the time measured in seconds.
Substituting into the equation, we have;
V = 28 + 2.5*3
V = 28 + 7.5
Final velocity, V = 35.5m/s
Some one plz help me and I will give you brainliest plz
Answers
A skateboarder rolls down the sidewalk with an initial velocity of 0 m/s. If her acceleration is
1.5 m/s”, how long will it take her to reach the bottom 120m away?
Answers
Answer:
80m/s
Explanation:
to find it you have to work it out by using the formula distance divided by speed to find time.
The time taken by the skateboarder to reach the bottom 120m away is 80 sec.
What is Acceleration?Acceleration may be defined as the rate of change of the velocity of an object with respect to time. Accelerations are vector quantities as it has both magnitude and direction.
When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing. If an object is speeding up and moving in a positive direction, it has a positive acceleration.
According to the question,
Speed of the skateboarder = 1.5 m/s
The total distance needs to be traveled = 120m
Total time taken =?
The Formula for calculating time is as follows:
Speed = Distance/time. Time = Distance/speed = 120/1.5 = 80 seconds.Therefore, the time taken by the skateboarder to reach the bottom 120m away is 80 sec.
To learn more about Acceleration, refer to the link:
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Which is larger, 12 kilometers or 7.5 miles? Show you’re work plz ASAP!!!!!
Answers
Answer:
there are just a bit over 1.6 km in a mile so 7.5*1.6=12. something so there is just a little bit more distance in 7.5 miles
Explanation:
Water is considered to be
Answers
Answer: the thing that brings you life- h2o- idrk the question but if this helps your welcome ^-^have a good day
Explanation:
Which are electromagnetic waves? Check all that apply.
earthquake waves
infrared waves
ocean waves
radio waves
ultraviolet waves
Answers
Answer:
infrared waves
radio waves
ultraviolet waves
Explanation:
Radio waves are used for communication such as television and radio.
Infrared light is used by electrical heaters, cookers for cooking food, and by infrared cameras which detect people in the dark.
Ultraviolet radiation can kill bacteria that are present in water - this sterilises the water and makes it safe to drink.
Answer:
infrared waves
radio waves
ultraviolet waves
Explanation:
Radio waves are used for communication such as television and radio.
Infrared light is used by electrical heaters, cookers for cooking food, and by infrared cameras which detect people in the dark.
Ultraviolet radiation can kill bacteria that are present in water - this sterilises the water and makes it safe to drink.
3. A 6 kg block moving to the right at 4 m/s collides with and sticks to a stationary block of unknown mass. If the two blocks move off to the right at 3 m/s, what was the mass of the stationary block?
Answers
Answer: 2kg
Explanation:
This problem is a textbook conservation of momentum problem. The intial momentum is equal to the final momentum. For the initial state of each block, only the first one was moving. Then they both combine to move together.
Pi = Pf
with p = mv
(6kg)*(4m/s) = (6kg+xkg)(3m/s)
Let x equal the unknown mass of block 2
24 = 18 + 3x
6 = 3x
x = 2kg