A man travels 15 km east before turning around and heading 5 km west. What is his displacement?
A) 20 km
B) 10 km west
C) 10 km East
D) 20 km East
Answers
Answer:
10 km East
Displacement is the shortest path between two points.
Related Questions
Oddyssey was named after the film 2001 A space Odyssey. Suggest a reason for this
Answers
Answer:
was inspired by Clarke's 1951 short story "The Sentinel" and other short stories by Clarke. :)
plz help!!!
urgent!!
will give the brainliest!!!
Answers
Answer: Find the answer in the explanation.
Explanation:
I.) A piece of wire at room temperature.
The resistance of a piece of wire at room temperature is independent of both current and the voltage because it is an Ohmic component.
II.) Filament bulb
The filament wire in the filament bulb does not obey Ohms law.
For very small currents and voltage, the graph is roughly a straight line. At higher voltages, the line starts to curve.
III.) A diode is any component that allows electric current in only one direction. The resistance of a diode depends on the potential difference across it. Therefore, it does not obey Ohms law. It is a non-Ohmic component.
Find the attached files for the figures
A town is considering building a biodiesel power plant that would burn biomass to generate electricity. Which of the following correctly lists an advantage and a disadvantage of this project?
A) Advantage: it could help get rid of unwanted waste. Disadvantage: there is no way to use the electricity created.
B) Advantage: it reduces dependence on fossil fuels. Disadvantage: it would emit pollution into the air.
C) Advantage: it is a commonly used energy source. Disadvantage: building the plant would attract new people to the area.
D) Advantage: it would use energy from the sun and wind. Disadvantage: it is a non-renewable source of energy.
Answers
Answer:
A ' is the only choice that has a true advantage and a true disadvantage.
Explanation:
What causes the particles within the nucleus of an atom to bond together? Question 12 options: electromagnetism gravity weak nuclear force strong nuclear force
Answers
Answer:
Strong nuclear force
Explanation:
The particles in the atom's nucleus bond together because there is a strong nuclear force between the protons and neutrons that attracts them to each other and binds together the nucleus.
Reason why: The particles bond together because of the strong nuclear force between the neurons and protons
What do you feel when you hold your hand near a glowing fire or an electric heater?
Answers
Answer:
The heats radiation.
Explanation:
When placing your hand close to a fire or electric heater, you can feel the warmth of the object. Pull your hand away from it, it'll be cooler.
Answer:
The radiation of heat
Explanation:
What Variables Affect Friction? Select all that apply.
Answers
A pendulum clock is taken to the moon (g = 1.6 N/kg). How long must the pendulum be in order for the clock to
continue keeping accurate time (1 second cycle)?
3.2 m
7.9 m
0 0.25 m
0.041 m
Answers
Answer:
0.041 m
Explanation:
T = 2π√(L/g)
1 s = 2π√(L / (1.6 N/kg))
L = 0.041 m
Answer:
0.041
Explanation:
got right on test!
Would you have been a Federalist or an Anti-Federalist? Why?
Answers
Answer:
Explanation:
I would have been an anti-federalist. They favored a weak central government because they related it to the British tyranny. Federalists believed in a strong central government, almost controlling. I would not have respected this type of government.
Which shows a decrease in fluid pressure? A. Water in a creek slows down as it enters a slow-moving river. B. Oxygen is compressed as it is put into a pressurized tank. C. A river speeds up when it moves into a narrower channel. D. A fan is turned on high speed to low speed.
Answers
Answer:
Option D.
A fan is turned from high speed to low speed.
Explanation:
It is important to note that air is also a fluid.
In a system, static pressure of air increases with the speed of rotation of the fan. This is because when the speed of the fan is increased, the force with which it is pushing the air molecules is increased. Since pressure is a relationship between force and area, the pressure of the air molecules will be increased.
Conversely, when the speed of the fan is reduced, the priming force on the air molecules will be reduced, hence the pressure of the air will drop.
This makes option D the correct option
Answer:
A
Explanation
Becasue the water level is decreasing
Which of the following is an example of a primary source?
A. A dictionary definition of a science term
B. An article written by a scientist
C. A textbook written by a scientist
D. An encyclopedia entry about an experiment
Answers
Answer:
i think its no c.
a textbook written by a scientist. because its a first hand data.
An article written by a scientist is an example of a primary source. The correct option is option (B).
A primary source refers to an original, firsthand account or direct evidence of an event, topic, or research. It is created by individuals who directly participated in or witnessed the subject matter. An article written by a scientist would be considered a primary source as it typically presents the researcher's own observations, experiments, methodology, and conclusions.
It provides direct access to the original research and findings, making it an important source for scholarly and scientific purposes. In contrast, options A, C, and D are secondary sources that provide interpretations or summaries of information from primary sources.
Therefore, The correct option is an option (B).
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Which option describes a phase change
Answers
Answer:
b. Gasloine evaporating into the air
I tryed to answer
Please help me in this question!! There is NO picture fo this question! In a physics lab, 0.30 kg puck A, moving at 5.0 m/s [W], undergoes a collision with 0.40 kg puck B, which is initially at rest. Puck A moves off at 4.2 m/s [W 30° N]. Find the final velocity of puck B.
Answers
Frank gives a box of books a push to the right, which makes it slide across his
bedroom floor. Friction slows the box down as it slides. Which free-body
diagram shows the box as it is sliding to the right, after Frank has stopped
pushing it?
Answers
Answer:
C
Explanation:
Answer:
yea its c
Explanation:
Which explains the operation of a hydraulic lift system? A. Archimedes' principle B. Pascal's principle C. Newton's principle D. Bernoulli's principle
Answers
Answer: B. Pascal's principle
This is the idea where you compress a liquid on one end of a tube (more or less), and the liquid's pressure is transmitted to the other end to help lift a heavy object. Often the compressing force is downward to take advantage of gravity.
Erica throws a tennis ball against a wall, and it bounces back. Which force is responsible for sending the ball back to Erica?
Answers
OPTIONS :
A.) the force that the ball exerts on the wall
B.) the frictional force between the wall and the ball
C.) the acceleration of the ball as it approaches the wall
D.) the normal force that the wall exerts on the ball
Answer: D.) the normal force that the wall exerts on the ball
Explanation: The normal force acting on an object can be explained as a force experienced by an object when it comes in contact with a flat surface. The normal force acts perpendicular to the surface of contact.
In the scenario described above, Erica's tennis ball experiences an opposite reaction after hitting the wall.This is in relation to Newton's 3rd law of motion, which states that, For every action, there is an equal and opposite reaction.
The reaction force in this case is the normal force exerted on the ball by the wall perpendicular to the surface of contact.
A 51-kg woman runs up a vertical flight of stairs in 5.0 s. Her net upward displacement is 5.0 m. Approximately, what average power did the woman exert while she was running?
Answers
Answer:
The average power the woman exerts is 0.5 kW
Explanation:
We note that power, P = The rate at which work is done = Work/Time
Work = Energy
The total work done is the potential energy gained which is the energy due to vertical displacement
Given that the vertical displacement = 5.0 m, we have
Total work done = Potential energy gained = Mass, m × Acceleration due to gravity, g × Vertical height, h
m = 51 kg
g = Constant = 9.81 m/s²
h = 5.0 m
Also, time, t = 5.0 s
Total work done = 51 kg × 9.81 m/s²× 5 m = 2501.55 kg·m²/s² = 2501.55 J
P = 2501.55 J/(5 s) = 500.31 J/s = 500.31 W ≈ 500 W = 0.5 kW.
Which answer best describes the scientific method?
A. An experiment that has no independent variables
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B. Ten steps that are followed in a certain order
C. The basic categories for five processes that scientists use
D. The exact order of steps used in every experiment
SUBMIT
Answers
Answer:
D. The exact order of steps used in every experiment
Explanation:
since the scientific meathod is a process of exact steps used to create an experiment this would be the closest answer
Answer:
C. The basic categories for five processes that scientists use
Which of the following statements about atomic masses is true? Question 14 options: Atomic masses include masses of neutral atoms. Atomic masses include masses of bare nuclei. Atomic masses do not include masses of electrons. Atomic masses do not include masses of neutrons.
Answers
Answer:
Atomic masses do not include masses of neutrons
Atomic masses do not include masses of electrons is the statement that is true about atomic mass.
What is atomic mass?It is the sum of the mass of all the protons as well as the neutrons that are present inside the nucleus. It is used to consider the total mass of the atom because electrons have a very negligible mass as compared to protons and neutrons.
Atomic mass = total number of protons present in the nucleus + total number of neutrons present in the nucleus of an atom
While the atomic number represents only the number of the protons present in the nucleus, for example, the atomic number of the carbon atom is six
For example, the atomic mass of the carbon atom is 12 because a single carbon atom has 6 protons as well as 6 neutrons.
Atomic masses do not include masses of electrons is the true statement about atomic mass.
Learn more about atomic mass from here
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15. The above figure shows the path of a ray of light falling on the mirror(s) represented by a box. Which of the following arrangements of mirrors will produce light rays in the path shown above?
Answers
Answer: A
Explanation:
From the figure given as attachments, the error pointing upward signifies the incident ray while the one point downwards signifies the reflected ray.
One of the laws of reflection is stated that the angle of incidence is equal to the angle of reflection.
Since the two arrows are parallel to each other, then the mirror must be perpendicular to the two arrows. That is, the incident ray and the reflected ray must be perpendicular to the mirror.
Option A is the correct answer.
Answer: answer is NOT A, ITS B!
Explanation:
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Which of the following elements are in this chemical reaction: Zn (s) + HCl (9) → ZnCl2 (s) + H2 ?
Multiple answers
Α. Η
B. CI
C. Zn
D. nCI
Answers
Answer:
A, B and C
Explanation:
You are given the chemical equation.
The chemical reaction:
Zn (s) + HCl (9) → ZnCl2 (s) + H2
The elements involved are
Zinc, hydrogen and Chlorine.
That is, H, Cl and Zn
The Zinc is in solid form
While hydrochloric acid is in aqueous form.
The correct answers are A ,B and C
A 100 N child slides down a frictionless inclined plane as shown in the figure below. Which one of the following statements is true concerning the normal force that the plane exerts on the child?
Answers
Answer:
Normal force may be less than weight, if there is some force with a component that acts opposite to the weight force. ... If the pulling force is horizontal, on a horizontal surface, then the normal force is equal to the weight. This is something your chould be able to see from a free-body diagram
Explanation:
Which line shows both positive velocity and positive acceleration?
Answers
I THINK LINE [ D ] IS THE RIGHT ANSWER....
Explanation:
BECAUSE IN [ D ] THERE SHOWS MANY ANGLE AND THERE LIES BOTH POSITIVE VELOCITY AND POSITIVE ACCELERATION.......
HOPE IT HELP.......❣❣❣
Answer:
Line C
Explanation:
Start at point O and accelerates upwards in a positive slope.
an object that does not allow any light to pass through it is commonly known as
A: Translucent
B: Visible
C: Transparent
D: Opaque
This is not physics fyi this is physical science but it was not on the list
Answers
Answer: D: Opaque
Explanation:
Definition of Opaque on Merriam Webster: blocking the passage of radiant energy and especially light
Answer:
opaque
Explanation:
Definition of Opaque on Merriam Webster: blocking the passage of radiant energy and especially light
hope this helps stay safe :)
Sandra wants to know how many students are a part of the business department at her school. She has a list of 240
students' majors. She goes to her record and selects the column for the department and the column with the student
names. She clicks on the Total button and in the Student Name column selects
Average
Count
Maximum
Minimum
Answers
Answer:
Count
Explanation:
The count will show you how many students are apart of the business department
What is the wave speed of a wave that has a frequency of 100 Hz and a wavelength of 0.30 m? please no bad answers
Answers
Answer:
39 m/s
Explanation:
speed = frequency x wavelength (All SI Unit)
speed = 100 Hz x 0.30 m = 30 m/s
The line graph below shows the number of downloads of two songs after
they are released. The downloads are shown in units of hundreds.
70
Number of downloads
(hundreds)
30
10
10 11 12 13 14 15
Time minutes)
a
About how many downloads did song 2 have at minute 8?
Answers
Ethan made a diagram to compare examples of the first and second laws of thermodynamics. What belongs in the areas marked X and Y?
X: The internal energy of a piston system increases
as heat is added and rises to a cool area
Y: As thermal energy is added to a container, some
of the energy is lost to the environment
X: As thermal energy is added to a container, some
of the energy is lost to the environment
Y: The internal energy of a piston system increases
as heat is added and rises to a cool area
X: A cold spoon placed in hot liquid gets warmer
Y: Thermal energy is converted to light energy
X: Thermal energy is converted to light energy
Y: A cold spoon placed in hot liquid gets warmer
Answers
Answer:
D: X: Thermal energy is converted to light energy
Y: A cold spoon placed in hot liquid gets warmer
Explanation:
j took the quiz
The first and second laws of thermodynamics are used to describe the process of heat transfer.
What are the laws of thermodynamics?The laws of thermodynamics are laws that show the transfer of heat energy there are three laws of thermodynamics that guide heat transfer.
From the statements of the first and second laws of thermodynamics, the statements that fit into the circles are;
X: Thermal energy is converted to light energy
Y: A cold spoon placed in hot liquid gets warmer
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What is the force of gravity (from the Earth) on the 700kg satellite if it’s 10km above the Earth's surface?
Answers
Answer:
g = 4.7 × [tex]10^{-16}[/tex] m/[tex]s^{2}[/tex]
Explanation:
Given that the mass of the satellite = 700 kg, and 10,000 m above the earth;s surface.
From Newton's second law,
F = mg ............... 1
From Newton's gravitation law,
F = [tex]\frac{GMm}{r^{2} }[/tex] .................. 2
Where: F is the force, G is the gravitational constant, M is the mass of the first body, m is the mass of the second body, g is the gravitational force and r is the distance between the centers of the two bodies.
Equate 1 and 2 to have,
mg = [tex]\frac{GMm}{r^{2} }[/tex]
⇒ g = [tex]\frac{GM}{r^{2} }[/tex]
But; G = 6.67 × [tex]10^{-11}[/tex] N [tex]m^{2} Kg^{-2}[/tex], M = 700 Kg, r = 10000 m
Thus,
g = [tex]\frac{6.67*10^{-11*700} }{10000^{2} }[/tex]
= [tex]\frac{4.669*10^{-8} }{1*10^{8} }[/tex]
= 4.669 × [tex]10^{-16}[/tex] m/[tex]s^{2}[/tex]
The force of gravity on the satellite is 4.7 × [tex]10^{-16}[/tex] m/[tex]s^{2}[/tex].
A deep-space satellite is sent to orbit a distant planet with unknown mass. On
arrival, the satellite begins its orbit and measures a gravitational pull from the
planet of 620 N. If the satellite has a mass of 450 kg and orbits the planet at a
radius of 4.0 x 10^6m, what is the approximate mass of the planet?(recall that G=6.7x10^-11 N•m2/kg^2.)
Answers
Answer:
The mass of the planet is [tex]3.29\times 10^{23}\ kg[/tex].
Explanation:
Given that,
The gravitational pull on the planet is 620 N
Mass of a satellite is, m₁ = 450 kg
Radius of a planet is [tex]4\times 10^6\ m[/tex]
We need to find the mass of the planet. Gravitational force is given by :
[tex]F=\dfrac{Gm_1m_2}{r^2}[/tex][tex]m_2[/tex] is the mass of the planet
[tex]m_2=\dfrac{Fr^2}{Gm_1}\\\\m_2=\dfrac{620\times (4\times 10^6)^2}{6.7\times 10^{-11}\times 450}\\\\m_2=3.29\times 10^{23}\ kg[/tex]
So, the mass of the planet is [tex]3.29\times 10^{23}\ kg[/tex].
hello:)!
I don’t really understand the uniform deceleration too :/
Answers
Answer:
Deceleration is the opposite of acceleration.
The mathematical formula for deceleration is:
[tex]Deceleration = \frac{Final velocity - Initial velocity}{Time taken}[/tex]
Uniform deceleration of an object can be defined as decreasing the velocity of an object in equal amount in an equal interval of time.
The graph attached below shows a constant decrease in the velocity with a uniform time interval.