Answer:
Answer: A. [tex]\vec r = 4\hat x+2\hat y[/tex]
Explanation:
Sum of Vectors
The vectors plotted in the graph are arranged using the head-to-tail method, i.e. placing the tail of the second vector at the head of the first vector. The head of the second vector indicates the sum of both vectors.
From the graph, we can see the head of the second vector lies in the point of coordinates (4,2).
This vector is represented as:
[tex]\vec r = 4\hat x+2\hat y[/tex]
Answer: A. [tex]\mathbf{\vec r = 4\hat x+2\hat y}[/tex]
10. A car starts from rest and travels for 5.0 s with a constant acceleration of -1.5 m/s/s.
A. What is the final velocity of the car?
B. How far does the car travel in this time interval?
Answer:
a.-7.5 m/s
b.18.75 m
Explanation:
hope it helps
John argues that energy is not conserved because when someone presses the brakes in a moving car, kinetic energy is lost. What should you say to correct John?
types of energy i really need this answer
Answer:
These are the two basic forms of energy. The different types of energy include thermal energy, radiant energy, chemical energy, nuclear energy, electrical energy, motion energy, sound energy, elastic energy and gravitational energy.
Explanation:
In each case, three charged particles are fixed in place at the vertices of an equilateral triangle. The triangles are all the same size. Rank the magnitude of the net electric force on the lower-left particle. Greatest ______ _______ _______ _______ Least Explain your reasoning.
Answer:
hello your question is incomplete attached below is the complete question
answer : [tex]F_{E} > F_{F} > F_{A} = F_{B} > F_{C} =F_{D}[/tex]
Explanation:
The explanation behind the reasoning is attached below
Ranking the magnitude of the net electric force on the lower-left particle from the greatest to the least
[tex]F_{E} > F_{F} > F_{A} = F_{B} > F_{C} =F_{D}[/tex]
The magnitude of the net electric force on the lower-left particle. greatest to least in order of [tex]\rm F_E > F_F > F_A= F_B > F_C=F_D[/tex]
What is electric force?The electric force between the two charges is directly propotional to the product of the charge and inversly propotional to the square of the distance between them.
The electric force for each case found as;
[tex]\rm F_1 = \frac{2K q^2}{q^2} \\\\ \rm F_2 = \frac{2K q^2}{q^2} \\\\[/tex]
[tex]\rm F_3= 2 m \\\\ \rm \rm F_4= 4\sqrt{3} m\\\\ \rm F_5= 4m[/tex]
Hence the magnitude of the net electric force on the lower-left particle. greatest to least in order of [tex]\rm F_E > F_F > F_A= F_B > F_C=F_D[/tex]
To learn more about the electric force refer to the link;
https://brainly.com/question/1076352
If a scientist wants to figure out how old a rock layer is, would it be useful to use a substance that takes a long time to break down (has a long half life), or a substance that breaks down quickly?
A.A substance that breaks down slowly, because then there won't be enough left to measure
B.A substance that breaks down slowly, because then there will be enough left to measure.
C.A substance that breaks down quickly, so it will be all gone and we'll know it's old
Answer:
B.
Explanation:
This is because if it has a long half-life then there will be enough rock left to be able to determine the age of the rock. It is not A. because if it has a long half-life there would be part of the substance left to determine the age. It is not C. because in order to study the substance, there must first be a substance left to study.
Hope this helps!
What happens to an object at rest if there is no net force
on the object?
Answer:it will continue in its state of rest.
Explanation:
SOMEONE PLZ HELP , I HAVE 4 HW DUE TMR BC MY TEACHER JUST GIVE ME A VERY SHORT TIME TO DO THE WORK . 50POINTS
Answer:
4. Violet light has the shortest wavelength of all the colours and the highest frequency. Red has the longest wavelength and the lowest frequency.
5.
a. Radio waves
b. Radio waves
c. Radio waves
d. Radio waves
e. Infrared waves
f. Infrared waves
g. Infrared waves
h. X-ray waves
i. Gamma ray waves (UV)
6. Ultraviolet (UV) radiation
7. Premature aging of the skin and sun damage
(liver spots, keratosis, solar elastosis, etc.)
Hope it helps!
d. Radio waves
e. Infrared waves
g. Infrared waves
h. X-ray waves
i. Gamma ray waves (UV)
6. Ultraviolet (UV) radiation
Obi Wan Kenobi is force pushing some bad guys into a forcefield. The bad guys (m= 300 kg) were originally at REST 5 meters away from the forcefield. It took them 0.5 seconds to hit the forcefield. How much force does Obi Wan apply?
Answer:
F = 12000 N = 12 KN
Explanation:
First we need to find the acceleration of the bad boys by using second equation of motion:
s = Vi t + (1/2)at²
where,
s = distance covered = 5 m
Vi = Initial Velocity = 0 m/s
t = time taken = 0.5 s
a = acceleration = ?
Therefore,
5 m = (0 m/s)(0.5 s) + (1/2)a(0.5 s)²
a = 2(5 m)/(0.5 s)²
a = 40 m/s²
Now, we calculate the force applied by Newton's Second Law:
F = ma
where,
F = force = ?
m = mass of bad guys = 300 kg
Therefore,
F = (300 kg)(40 m/s²)
F = 12000 N = 12 KN
Which statement correctly describes plastic?
A. It has a low resistivity and allows charges to move freely.
B. It has a high resistivity and prevents charges from moving freely.
C. It has a high resistivity and allows charges to move freely.
D. It has a low resistivity and prevents charges from moving freely.
Answer:answer is B
Explanation:
HEEEEELLLPPPPPP!!!!!!!!!!! PPPPPPPPPPPLLLEAASSEE!!!
I will give brainliest
Why do the north poles of these two magnets repel each other?
Answer:
The arrows always start at the magnet's north pole and point towards its south pole. When two like-poles point together, the arrows from the two magnets point in OPPOSITE directions and the field lines cannot join up. So the magnets will push apart (repel).
A car traveling at 100km/hr .how many hours will it take to cover a distance of 750 km
Answer:
7.5 right?
Explanation: if im wrong shoot me
Answer:
7.5 hours( 7 hours 30 minutes)
Explanation:
Speed = distance/time
time = distance/speed
750 km divided by 100 km/hr = 7.5 hours
Calcular el diámetro que debe tener en el embolo mayor un gato hidráulico, para obtener una fuerza de 3500N. Cuando el embolo menor tiene un diámetro de 16 cm y se le aplica una fuerza de 250N
Responder:
0.6 m
Explicación:
Responder:
0,15 m
Explicación:
Paso uno:
dado
Fuerza F = 250N
diámetro d1- 16 cm am = 0.16 m
A1 = πd1 ^ 2/4 = 3.142 * 0.16 ^ 2/4
= 0.02 m ^ 2
Carga L = 3500N
A2 =?
Segundo paso:
sabemos que la presión aplicada a un extremo para levantar una carga en el otro extremo se expresa matemáticamente como
F1 / A1 = F2 / A
sustituir
250 / 0.2 = 3500 / A
cruzar multiplicar
A2 = 0.02 * 3500/250
A2 = 70.3 / 250
A2 = 0.28
sabemos que área = πd ^ 2/4
0.28 = πd2 ^ 2/4
0.28 = 3.142 * d2 ^ 2/4
0.28 * 4 / 3.142 = d2 ^ 2
0.36 = d ^ 2
d = √0.36
d = 0.6 m
el diámetro debe ser de 0.6 m
If a star is measured to have a parallax angle of 0.5 arcsec, how far away is the star? a. 2 ly b. 2 pc c. 0.5 pc (astronomy)
Answer:
2 pc
Explanation:
The parallax angle is the angle of the earth at different times in a year relative to a given closest star.
P = [tex]\frac{1}{d}[/tex]
where p is the parallax angle, d is the distance between the earth and the star
Since p = 0.5 arcsec, then;
d = [tex]\frac{1}{p}[/tex]
= [tex]\frac{1}{0.5}[/tex]
= 2
d = 2 pc
The star is 2 parsec away from the earth.
Question 14 of 25
The image shows devices that convert wind energy into electrical energy.
What is one advantage of using this type of device in place of burning fossil
fuels?
Answer:
Explanation:
B
Answer: B.It uses a renewable resources
Explanation:
Which series of energy transformations takes place in the circuit when the siren turns on? A: Chemical energy > Sound energy > Electrical energy B: Sound energy > Electrical energy > Chemical energy C: Chemical energy > Electrical energy > Sound energy D: Electrical energy > Chemical energy > Sound energy
Answer: The correct option is C ( Chemical energy > Electrical energy > Sound energy)
Explanation:
Energy is defined as the capability or ability to perform work. It is measured in joules. It is a scalar quantity ( that is, fully described by its magnitude).
The principle of conservation of energy states that in a closed system, energy can neither be created nor destroyed during transformation. Although energy can be transformed so that the total energy of a given system always remains constant. The different forms of energy includes:
--> mechanical energy
--> Chemical energy
--> Heat energy
--> sound energy
--> electrical energy
--> sound energy
To be able to create a circuit that will produce siren sounds, a source of power supply will be needed. This would be derived from a battery cell( Chemical energy). This supplies current (electrical energy)to the sound system of the circuit to produce the siren sounds heard(sound energy). Therefore the energy transformation is from CHEMICAL ENERGY to ELECTRICAL ENERGY to SOUND ENERGY.
in which state of matter are the particles closest together?
Answer: The particles of a solid are [generally] closest together while those of a gas are farthest apart
Explanation:
What does the concentration of damaging earthquakes indicate about the underlying rock structure of the area?
Answer:it is unstable and may be fragmented or lie along a fault line
Explanation:
WILL GIVE BRAINLIEST (c) 3 pts. In order to stop the evil Magneto, Jean Grey needs to fly from
rest on the ground to the top of the Statue of Liberty (46 m) in 2.0
seconds. What is her minimum average acceleration during her
ascent? Assume constant
acceleration for the entire distance and that
she does not decelerate near the top.
Answer:
Acceleration, [tex]a=23\ m/s^2[/tex]
Explanation:
Given that,
The statue of Liberty is at a height of 46 m.
Jean Grey needs to fly from rest on the ground to the top of the Statue of Liberty (46 m) in 2.0 seconds.
We need to find her minimum average acceleration during her ascent. Let it is t. Using the second equation of motion to find it.
[tex]h=ut+\dfrac{1}{2}at^2\\\\h=\dfrac{1}{2}at^2\\\\a=\dfrac{2h}{t^2}\\\\a=\dfrac{2\times 46}{(2)^2}\\\\a=23\ m/s^2[/tex]
So, the constant acceleration is [tex]23\ m/s^2[/tex] for the entire distance.
Which one is it
Plz help me :)
Answer:
5 I think will be none of the above and 6 could be all of the above
how do i get a girl to like me
Answer:
FIRST OF ALL get to know her, and DON'T STARE AT HER ALL THE TIME! And then you just let her know that you like her!
Explanation: HOPE THIS HELPS!
3. When two liquids are mixed and a solid
forms as a reaction, the solid is called a
A. precipitate
participant
c. percipitate
D. polypeptide
And why?
Answer:
D
Explanation:
What causes the attraction between protons and neutrons?
Answer:
The nuclear force
Explanation:
hope this helps
Which of the following examples shows the greatest amount of biodiversity
Question 2 options:
A large amount of salmon swimming upstream
A lake full of a larger variety of fish, frogs, and birds
A densely populated city full of all different kinds of people
An empty field where only grass and insects are living
Answer:
A lake full of a larger variety of fish, frogs, and birds
300 watts of power is produced over 15 seconds. How much work was done transferring the power?
Answer:
4500
Explanation:
Formula: power x time
300 x 15 = 4500
Please help! I really need it.
I believe the answer is Justine, correct me if I’m wrong.
A carton of milk contains 128 ounces. Sara’s son drinks 4 ounces of milk at each meal. How many 4-ounce servings will one carton of milk provide? There are _____ servings.
Answer:
32 four ounce servings
Explanation:
if you take the total amount of ounces the carton holds (128 ounces)and divide it by the number of ounces the son consumes per serving(4ounces) you will get the total amount of servings(32servings)
If you want to increase the acceleration of a baseball when you throw it, what must you increase to make this happen?
A. Acceleration
B. Newton's 2nd law
C. Force
B. Mass
Answer: I think c force
Explanation:
An 8-N force is applied to a 2-kg box to accelerate it to the right across a table. The box
encounters a force of friction of 5 N. What is the acceleration of the object?
(1 Point)
4 m/s2
2.5 m/s2
1.5 m/s2
1 m/s2
Answer:
1.5
Explanation:
resultant force=8-5=3N
using f=ma
a=f/m
=3/2
=1.5
can someone please answer and explain?
its the first one i had the same answer for a test and i got it right
a.
Study harder than everyone else
c.
Learn faster than other students
b.
Study more often than everyone else
d.
Make studying part of their daily routine
Please select the best answer from the choices provided
A
B
C
D
Answer:
d one
Explanation:
d one frome my site
Answer:
d
Explanation:
d