Select all of the following that are vector quantities.
A acceleration
B. force
C. mass
D. speed
E. velocity
F. volume
Answers
Vector(both magnitude and direction) : Acceleration, velocity, displacement, angular velocity.
Explanation : Vector quantities have both magnitude and direction.
Scalar quantities have only magnitude.
Distance is a scalar quantity. It refers only to how far an object has traveled. For example, 4 feet is a distance; it gives no information about direction. To say an object traveled 4 feet is somewhat ambiguous. To say the object traveled 4 feet west, for example, would be a displacement, and would then be a vector quantity. It gives a more complete picture of what happened.
Mass is a scalar quantity. Simply put, it refers to how much matter an object is made up of. It has magnitude but gives no indication of direction in any sense. The vector counterpart to mass is weight.
Weight is a vector quantity. Weight is a force, and forces are vectors, i.e. having both magnitude and direction. Perceived weight of an object at rest on earth is given by
W=→Fg=mg
, the product of the mass of the object and the free-fall acceleration constant, g
, or simply equal to the force of gravity acting on the object. The force of gravity acts downward.
Time is a scalar quantity (as far as we are concerned at this level). It gives information about magnitude, i.e. how much time, but no information about direction.
Volume is a scalar quantity. It refers to the amount of space that an object occupies and therefore has magnitude, but gives no information about direction.
Density is a scalar quantity, having only magnitude and giving no information about direction. We can also reason that, because density is equal to mass divided by volume and both mass and volume are scalar quantities, density must also be a scalar quantity.
Speed is a scalar quantity, having only magnitude and giving no information about direction. For example,
40ms
is a speed, it tells us how fast an object is traveling, but nothing abut which direction the object is traveling in. The vector counterpart to speed is velocity.
Velocity is a vector quantity. Velocities have both magnitude and direction. For example,
40ms
NE is a velocity.
Acceleration is a vector quantity. Acceleration has both magnitude and direction. For example,
9.8ms2 downward or −9.8ms2
vertically is an acceleration.
Force is a vector quantity. Force has both magnitude and direction. Weight is an example of force given above. Another is the force of friction, which has some magnitude and acts in the direction opposite that of motion.
Temperature is a scalar quantity. A measurement of temperature has magnitude, but gives no information about direction.
Energy is a scalar quantity. It gives information about magnitude, e.g. how much energy an object has, but none about direction.
Note that certain quantities which are alone scalars can be represented as vectors when we discuss intervals or how the quantities change (e.g. measure of increase or decrease).
Related Questions
There are five different types of muscles in exercise physiology.
A.
True
B.
False
Answers
Answer: The answer is B) False
Explanation: There are only three muscle types in the exercise physiology.
Skeletal Muscle
Smooth Muscle
Cardiac Muscle
what should i do when my teacher betrays my trust and tells my parents the way i act and my secrets?
Answers
Answer:
stop telling the teacher your secrets and talk to her about it be like "hey i opened up to you because i trusted you and you broke that trust i wanted someone to talk to but you told my parents and to me i find that very rude."
Something like that if you want
Explanation:
Which of the following components of an ECG represents ventricular depolarization? a. P wave. b. QRS complex. c. T wave. d. PQ interval.
Answers
The component of an ECG that represents ventricular depolarization is the QRS complex. An ECG (electrocardiogram) is a graphic representation of the electrical activity of the heart. When the cardiac conduction system depolarizes the ventricles, the QRS complex is created.
This electrical activity is represented as a series of waveforms on an ECG. P wave, QRS complex, T wave, and PQ interval are the four waveforms that are represented in an ECG. Each waveform reflects a different aspect of the electrical activity of the heart. In an ECG, the P wave represents atrial depolarization. The QRS complex represents ventricular depolarization, which is the electrical activity that causes the ventricles to contract. The T wave represents ventricular repolarization, which is the electrical activity that occurs when the ventricles are preparing to relax. The PQ interval, also known as the PR interval, represents the time it takes for the electrical activity to travel from the atria to the ventricles. It reflects the duration of the electrical signal as it travels from the atria to the ventricles. The PQ interval is measured from the beginning of the P wave to the beginning of the QRS complex.
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A circuit contains a 1. 5 volt battery and a bulb with a resistance of 3 ohms. Calculate the current
Answers
A football player kicks a ball from ground level with an initial velocity of 22.0 m/s, 35.0° above the horizontal. What is the ball's initial velocity in the y-axis?
-please provide a step by step explanation
Answers
Answer:
12.5
Explanation:
the formula v⁰y=usin∅
therefore substitution of the values
v⁰y= 22sin(35) = 12.5
Free Fall Problems
1.)
A pencil is dropped from the top of a very tall bridge and hits the ground 3.2 s later
A) With what velocity did the pencil hit the river below?
B.)
How far did the pencil fall?||
Answers
Answer:
50.2m
Explanation:
Given parameters:
Time taken for the pencil to hit the ground = 3.2s
Unknown:
Final velocity = ?
height of fall = ?
Solution:
To solve this problem, we should apply appropriate motion equations;
A.
V = U + gt
V is the final velocity
U is the initial velocity
g is the acceleration due to gravity
t is the time taken
Insert the parameters and solve;
V = 0 + 9.8 x 3.2 = 31.36m/s
B.
h = ut + \(\frac{1}{2}\)gt²
h is the height of fall
Insert the parameters and solve;
h = \(\frac{1}{2}\) x 9.8 x 3.2² = 50.2m
a paramecium swimming through a fluid is moving at approximately a constant velocity as a result of wiggling its cilia. what can you say about the net force that is being exerted on it while it is doing this?
Answers
In the case of a paramecium moving at a constant speed, there is no net force acting on it.
The paramecium's cilia exerts a force on water that is equal to the force that the water exerts on the paramecium's cilia, according to Newton's third law.
The strength of the viscous force the water is exerting on the paramecium will be equal to the strength of the force the paramecium's cilia are exerting on the water.
How does Paramecium use cilia?
Cilia, or tiny strands like hair, cover the whole surface of parasites like cilia, which beat rhythmically to move them and guide bacteria and other food particles into their mouths.
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Question: An organiser of a bungee jumping competition changes the length of the bungee rope so different people can use the rope safely. Use your idea of forces to describe how the size of a person affects the rope when they jump.
Answers
An organiser of a bungee jumping competition changes the length of the bungee rope so different people can use the rope safely because high weight can cause the rope to stretch and break.
When a person jumps, their size impacts the bungee rope since their weight causes the rope to expand different manner. The force of a person's body weight causes the bungee rope to lengthen when they jump, and the degree of stretching depends on their mass. Since the force of the weight is greater, a bigger person will stretch the rope more than a lighter one. Due to this phenomenon, extra stretching of a rope can lead to breaking which can cause life hazards. Therefore, the organizer changes the length of the bungee rope.
For example, if an adult weighs twice as much as a kid, the bungee rope will stretch twice more than the kid's leaps. This is because the adult's weight is twice as much as the child's weight, so the force of the adult's weight will be twice as great, causing the rope to stretch twice as much.
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Determine the volume of the box and the block.
Determine the ratio of the block to the box:
Multiply this number by 100 to turn it into a percent.
Complete this statement: The volume of the block is _____ percent of the volume of the box.
Answers
Answer:
i donr know
Explanation:
Create a cylinder with a height of 9 cm and a radius of 5 cm. Notice that the estimated volume calculation is 706. 9 cm3. Drag the orange dot to double the radius. What do you notice about the volume?.
Answers
Answer:
Its D , Its is four times larger
Explanation:
I really hope this helps :)
Calculating Height
A ski lift is used to transport people from the base of a hill to the top. If the lift leaves the
base at a velocity of 15.5 m/s and arrives at the top with a final velocity of 0 m/s, what is the height of the hill? Round the answer to the nearest tenth.
Answers
\(\boxed{\sf v^2-u^2=2gh}\)
\(\\ \sf\longmapsto h=\dfrac{v^2-u^2}{2g}\)
\(\\ \sf\longmapsto h=\dfrac{0^2-15.5^2}{2(10)}\)
\(\\ \sf\longmapsto h=\dfrac{240.25}{20}\)
\(\\ \sf\longmapsto h=12.012m\)
A symmetrical three-phase generator is connected via a line to an asymmetric three- phase consumer. The system has neutral wire. 1. Calculate the complex amplitude values of system currents İmA, İm³, İmc. 2. Calculate phase ÜmAB, ÜmBC,, ÜmcAand lineUmÃO₁, Ümв0₁, Ümco₁ voltages. 3. Calculate İmN- 4. Draw the phasor diagram where all calculated phasors must be presented. 5. Calculate power angle PA, PB, PC for all phases. 6. Calculate active power for each phase PA, PB, Pc. 7. Calculate total active power for all phases together P. 8. Your variant number is made up of the last two digits on your student ID number. 3- phase system with neutral wire ΖΑ É ₁ O U₁ UCA A İN 0₁ ZB ÚB0₁ Ü 10v B UAB ÉB B BC İc İB C Zc ÚAO₁ Üco₁ B 13 220 13 19 10 15 80
Answers
The purpose is to understand the electrical characteristics and power distribution in a symmetrical three-phase generator connected to an asymmetric three-phase consumer with a neutral wire.
What is the purpose of the calculations and analyses mentioned in the paragraph?The given paragraph discusses a symmetrical three-phase generator connected to an asymmetric three-phase consumer in a system with a neutral wire. The following calculations and analysis are performed:
1. Complex amplitude values of system currents İmA, İm³, İmc are determined.
2. Phase voltages ÜmAB, ÜmBC, ÜmcA and line voltages ÜmÃO₁, Ümв0₁, Ümco₁ are calculated.
3. İmN, the current in the neutral wire, is calculated.
4. A phasor diagram is drawn to visually represent all the calculated phasors.
5. Power angles PA, PB, PC for each phase are calculated.
6. Active power for each phase PA, PB, Pc is determined.
7. Total active power for all phases together, P, is calculated.
8. The variant number is determined based on the last two digits of the student ID number.
These calculations and analyses are performed to understand the electrical characteristics and power distribution in the given three-phase system with a neutral wire.
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When a 5 kg rock is dropped from a height of 6 m on Planet X, it loses 24 J of GPE. What is the acceleration due to gravity on Planet X?
Answers
Answer:
g = 1.25m/s²
Explanation:
Given the following data;
Mass = 5kg
Height = 6m
Gravitational potential energy = 24J
To find the acceleration due to gravity;
Potential energy can be defined as an energy possessed by an object or body due to its position.
Mathematically, potential energy is given by the formula;
\( P.E = mgh\)
Where,
P.E represents potential energy measured in Joules.
m represents the mass of an object.
g represents acceleration due to gravity measured in meters per seconds square.
h represents the height measured in meters.
GPE = mgh
Substituting into the equation, we have;
24 = 5*6*g
24 = 30g
g = 30/24
g = 1.25m/s²
Therefore, the acceleration due to gravity on Planet X is 1.25m/s².
Answer:
g=0.8m/s^2
Explanation:
M=5kg
h=6m
GPE=24J
GPE=Mgh
g=GPE/Mh
g=24J/(5kg)(6m)=0.8
g=0.8m/s^2
When the force applied on an object is doubled, how does the pressure exerted on the object change
Answers
how (and why) does a planet change its speed while in orbit?
please help asap!!!
Answers
Answer:
A planet's orbital speed changes, depending on how far it is from the Sun. The closer a planet is to the Sun, the stronger the Sun's gravitational pull on it, and the faster the planet moves.
Explanation: hope that helps :)
Name 3 input components
Answers
Answer:
keyboards
mouse
scanner
Users can interact with a system or computer using input components, which are objects or elements. Three pictures of the input elements are shown below:
1. Keyboard
2. Mouse
3. Touchscreen
Keyboard: Text, commands, and other data are entered into a computer or other electronic device through the most commonly used input device, the keyboard. To enter characters and perform specific actions, users can press a variety of keys.
Another important input device is the mouse, which enables users to control a cursor on a computer screen. Users can navigate through the graphical user interface and interact with the software program by moving the mouse and pressing its buttons.
Users can interact directly with the display screen through a touchscreen, which is a user interface, by touching it with their fingers.
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What would take more work: a 10 kg bowling ball lifted 1 meter off the ground, or a 1 kg laptop lifted 10 meter off the ground? Explain how you arrived at your answer. PLEASE HELP!!!!!!!!!! 50 POINTSSSSS
Answers
Answer:
10kg ball
Explanation:
a laptop is a lot less in weight so you have to use less force to lift it
Answer:
10 kg bowling ball
Explanation:
A h e m.
It would be easy to lift 1kg laptop 20 meters without breaking a sweat and would be less than your body weight. But a 10kg bowling ball is that x10 so its heavier
what position should you keep the ignition key of your car turned to when you let the car rest before cranking again?
Answers
On a contemporary gasoline engine, the startup procedure is controlled by the electronic control unit. There is no requirement for the operator to wait in the on position before starting the engine.
The key should be held in what position until the engine of the car starts?The ignition switch has four settings: ACCESSORY (I), ON (II), LOCK ((0)), and START (III). To start the engine, only use this location. You release the ignition switch to return the switch to the ON (II) position.
How much time should pass before your car starts?If you haven't prepared your car for a lengthy time of not driving it, you shouldn't let it rest for more than one month, and even then, you should try to start it up and drive it for 15 to 30 minutes a few times during the month.
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A block of mass m is hit by a force of magnitude F which causes the block to have an acceleration of magnitude a. If the same block is hit by a force of magnitude 19F, then which of these is the acceleration of the block will have what magnitude? A) aB) 19aC) one nineteenth of aD) 361aE) zero
Answers
The original acceleration is given by:
\(a=\frac{F}{m}\)If we applied to the same mass a force with a magnitude of 19F we have that the new accelertion is:
\(a^{\prime}=\frac{19F}{m}=19\cdot\frac{F}{m}=19a\)Therefore the new acceleration is nineteen times the original one; and hence the answer is Band he
Which property of a transverse wave stays the same even as the wave's
energy and other properties change?
Wavelength
Frequency
Rest position
Amplitude
ent
1 of 8 QUESTIONS
SUBMIT
Answers
The property of a transverse wave that stays the same even as the wave's energy and other properties change is the wavelength.
The correct option to the given question is option a.
The wavelength is the distance between two successive points of the wave that are in phase. As the wave's energy and amplitude change, the distance between two successive points of the wave that are in phase remains the same.
This is because wavelength is determined by the frequency of the wave and the speed of propagation. The frequency of the wave is the number of cycles of the wave that occur in one second, while the speed of propagation is the rate at which the wave travels through a medium.
If the frequency of the wave and the speed of propagation remain the same, then the wavelength will also remain the same even as the wave's energy and other properties change. This property is known as the characteristic of the wave.The amplitude is the maximum displacement of a point on the wave from its rest position. The frequency is the number of cycles of the wave that occur in one second. The rest position is the position of the medium when it is not disturbed.
Hence, wavelength of a transverse wave remains same even as the wave's energy and other properties change.
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calculate the energy
Answers
Answer:
8550 Joules of energy.
Explanation:
The bell is situated at the top of the tower, height = 45mWeight of the bell, F = 190 NThe workdone by the gravitational force = F.hcos180°As a result, when the body is 45 meters above the earth, gravitational force (e.g., weight) works downward. As a result, the angle formed by the force and h = 180°.Therefore the workdone by the gravitational force = 190 × 45 × -1= -8550 J
Thus, potential energy = neg of workdone= -(-8550 J) = 8550 Jbased on your reading "take a closer look" what can you say about the image that forms on the retina of your eye?
Answers
Answer:
it is an upside-down image but the brain realizes it and corrects it in its orientation so we see it in right direction.
Answer:
The lens of the eye is a convex lens. The image that it forms on the retina is upside down.
Explanation:
The eye makes an image, but it is upside down, the brain corrects the image and turns it right side up
Two carts collide and bounce apart. Cart 1 had a momentum of –6 kg • m/s before the collision. Cart 2 had a momentum of 10 kg • m/s before the collision.
What is the total momentum of the carts after the collision?
–16 kg • m/s
–10 kg • m/s
4 kg • m/s
10 kg • m/s
Answers
Answer:
4 kg m/s
Explanation:
When finding momentum after a collision, you can just add the momentums together, this would be 10 kgm/s -6 kgm/s to get 4 kgm/s
The total momentum of the carts after the collision is 4 kgm/s.
What is momentum?The momentum of an object is the product of mass and velocity of the object.
P = mv
Total momentum of the cartsThe total momentum of the carts is calculated as follows;
P = P₁ + P₂
P = -6 + 10
P = 4 kgm/s
Thus, the total momentum of the carts after the collision is 4 kgm/s.
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Can some one plz help me with this Im kinda busy today and this is due today!
Write a 5-6 paragragh essay about >>
You have been given the chance to spend a day with a famous person of your choosing. This person may be a character from a book, a movie, television or some other source. Why did you choose the person you did? Why is meeting with this person important to you?
Write a narrative about the time you spent with the famous person you have chosen.
Answers
Answer:
Ryan Upchurch
For many years I have learned a lot of things about him, Upchurch music, and his crazy aspects of life. And If there was A day then I got a list of things to do with him. First things first or me this is a hard question for a part of me would like to sit down with Ryan in a boardroom and discuss humanitarian ideas and share my opinions with them.
A part of me would like to go back in time and talk with the only person I wanted an autograph from, Katie Noal I would discuss her concepts in her songs, ask if I could get some pointers, and finally ask her to sing one of her songs.
But then again Ryan does not like her so it would only be fair to spend the day with him., she is amazing and I love her humor. And he is sharp and quick as a whip. My time with him would leave me busting a gut laughing so hard. It would be on my bucket list of things to do.
Now at this time, I would eat some chicken some good fried chicken with some mash potatoes his wife would have made. You know he is just a funny person he has a comedian personality, it would be a joyous time to spend with him. Then we would take a drive and he can show me where he grew up and some crazy memories or life lessons on the way. And explain some of his songs to me like my favorite ¨Vinyl¨.
I would ask Ryan where he took his plots from and what his aspects are of life and who inspired him along the way. Or to just do nothing and have almost forgotten how to think; for picturing in his mind, and for writing his songs for all of us to enjoy. A proud man who wanted to become invisible but the accomplished task did not bring him happiness and instead brought him Fame.
I would be especially interested in asking him about “Everlasting country¨. Who was that person or what were the events, which prompted him to create an image of severe, almost help of countless operations in the country and America. However, Upchurch and I would go very soon they forget everything they were taught and… over and over again. If I could spend the day with him I hope that we could go mudding and just enjoy him.
I am always interested in the way that how he writes his songs and express how he feels about America. Now I would love to help him write a song and I would call It ¨Country time love¨. After all that we would sit and enjoy the campfire and eat some Smores :) Or I would ask him when and how he preferred to write, whether his stories were long in the making etc.
And finally, the last question that I would ask Ryan Upchurch is to compare his time with the other singers and analyze if any of his most gloomy predictions have come true about how he see life. Of course, Upchurch will hardly consider the agenda, and modern achievement such high standards for people. After that long day with him, I would think of him for everything we had done for the day. Maybe he would understand how I feel about the way I see life and how he has changed the way I look at life. That he would develop and these events would happen some time so he was able to make a song putting it as me and his song. Cause that would be very exciting! I hope that maybe this day will come and I will get to remember that day and hope that I will get to see him again like go to a concert or just hang out for the day.Therefore If I spent a day with Ryan I would Eat some chicken go mudding and sit by the fire and enjoy some good music.
Explanation:
Answer:
If I were given a chance to meet anybody who has ever lived and spend the whole day talking to that person, I would choose the French Queen Marie Antoinette. The reason for my choice is not her extraordinary talents or achievements; instead, I am interested in how an ordinary woman could have made it through the turmoil of the dark times for the French monarchy, a difficult marital relationship and never lose her sense of dignity.
I admire Marie Antoinette first of all for having endured the challenge of spending all or most of her time in public when she was still the wife of the French dauphine when she had to “on my rouge and wash my hands in front of the whole world” (Wikipedia, 2006). To a certain degree, each of us has to endure the challenge of being in public with one’s thoughts and feelings, and I would ask her how she was able to withstand this trial. I would also ask her how she managed to remain modest and nice to people surrounding her so that Jeanne Louise Henriette Campan in his memoirs remembered of her as “unwilling … to be reminded of her elevation” (Campan, 2004, p. 10).
I would want to see the person who, by will of chance, was lifted to the highest position a woman could command in Europe of those times, yet remained affable and pleasant to her subordinates and unwilling to impress herself on them and humiliate anybody at a time when it was all too common in the nobility.
If we had a chance to talk at length with Marie Antoinette, I would also ask her what she considers to be her mistakes at court and how she would have corrected them if given a chance. She surely had quite a few, but, after all, historian Simon Sebag Montefiore could have been right saying that Marie Antoinette was “a woman more sinned against than sinning” (Wikipedia, 2006). I am interested in learning what she thought of her life when it came to such a disastrous end as the execution in the French Revolution. Did she blame the crowd? Or was she reproaching herself for not having done more to protect her image in the eyes of the people? Marie Antoinette surely could not have averted the revolution that happened because of someone else’s sins, but she perhaps had a chance to appear less self-indulgent to the people.
This is one more thing I could address, as well as ask how she could demonstrate that outstanding courage when she stood on the balcony of the royal palace in Versailles at the point of many guns aimed at her, and how she could have been so strong at the time of the execution. I believe that her strength demonstrates what an ordinary woman can do in the face of danger and teaches us a lot about how one should never lose a human face when challenged in any way. A talk with Marie Antoinette could give me profound insights into the nature of people and reveal many interesting points.
Explanation:
A passenger travels from the first floor to the 60th floor, a distance of 210 m in 35 s. what is the elevators speed
Answers
\(\\ \tt\bull\leadsto Speed=\dfrac{Distance}{Time}\)
\(\\ \tt\bull\leadsto Speed=210/35=6m/s\)
Answer:
6m per second
Explanation:
Distance=210m
Time=35s
speed=distance/time
speed= 210/35=6ms
How does the mass of an object affects its gravitational force?*answer in a full sentence pls * (PLS HELP ME )
Answers
Answer:
Here you go..
hope it helps..!
Explanation:
So since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force, so as the mass of either object increases, the force of gravitational attraction between them also increases.
Describe how the motions of the particles that make up an object change when the object’s temperature increases.
Answers
The motions of the particles that make up an object change when the objects temperatures increases because if the objects temperatures increases, the particles begin to move faster so the kinetic energy of the particles go really fast while the potential energy particles only increase when they go farther apart. 5Q.
I need help!!! What is the answer!!
Answers
Answer:
A I think hope it helps!!
what current flows between a voltage of 120v across a resistance of 30Ω?
Answers
Answer:
4 amp
Explanation:
From ohm's law,
V=IR
so,
I=V/R
I=120/30
I=4amp ans..
what is the meaning of velocity?
Answers
Answer:
Velocity is quickness of motion or action. A synonym is celerity; a simpler word is speed. In physics, velocity specifically refers to the measurement of the rate and direction of change in position of an object.pls pls mark me branilest
Answer:
Velocity is defined as displacement travelled per unit time in a fixed direction. It is a vector quantity as it has both magnitude and fixed direction.
Please mark me brainliest.