Answers
Answer:
i dont know
Explanation:
but i know that someone knows
Related Questions
Gọi E là trường vécto cò tính chất bảo toàn (hay con gọi là trường không rota). Trường E có những tinh chất nào sau đây
Answers
jawaban: what is languange???
can some one help me with this so i can bring my grade up
Answers
Answer:
a
Explanation:
You are out and about in the country and your father sees a rock that he really wants in the yard. Now you must get the very heavy rock into the back of a truck. The truck bed is 3 feet off the ground. Your father pulls out a 5-foot plank and begins to set up a ramp. At the same time, you have found a plank that is 8 feet long, and you show it to your father.
Which plank will give you the most mechanical advantage? Calculate the MA for each plank.
Answers
Answer:
Explanation:
Provided the planks are each strong enough to support the weight of the rock, the 8 ft plank will have a greater mechanical advantage.
The ideal (no friction) mechanical advantage for each ramp is
ME₈ = 8/3 = 2.67
ME₅ = 5/3 = 1.67
Un bloque de masa m = 2,0 kg está unido a un resorte de constante K = 300 N/m y se desliza sobre una superficie sin fricción. En el tiempo t = 0 el resorte no está estirado ni comprimido y la masa se mueve en el sentido negativo con su máxima rapidez de 12 m/s.
a) Calcule la amplitud del movimiento.
b) Escriba la ecuación de la posición de la masa en función del tiempo.
c) Escriba las ecuaciones de la velocidad y la aceleración en función de la posición.
d) Si usted frena el bloque hasta reducir la amplitud a la tercera parte ¿qué pasa con la frecuencia angular? Justifique su respuesta.
e) En el caso del literal anterior (en que la amplitud se reduce a la tercera parte) ¿qué pasa con la energía mecánica total? Justifique su respuesta
Answers
A hunter fires a rifle while seated with the butt of the gun resting against their shoulder. If the forward momentum is the same as the backward momentum of the gun, why isn't it as dangerous to be hit by the gun as it is by the bullet
Answers
Answer:
Because the bullet is smaller and has a sharp/pointy tip.
Explanation:
The bullet kinda puts the majority of kinetic energy in a small are, whereas the gun butt kinda spreads the energy evenly amongst a larger surface. If more explanation is needed add comment.
Question 13 (2 points)
A mass of 5.00 kg is in a gravitational field of�7.00�N/kg�. What force acts on the mass?
Question 13 options:
35.0 N
0.71 N
1.4 N
9.8 N
Question 14 (2 points)
If you plotted vector arrows around a mass to represent gravitational field vectors, describe how the length of the arrows would change as the locations at which they are drawn become closer to the mass that produces the field.
Question 14 options:
The arrows would become shorter.
The arrows would become longer.
The arrows would remain the same length.
The arrows would become shorter and reverse direction at some distance.
Question 15 (2 points)
What is Kepler's first law of planetary motion?
Question 15 options:
Planets have circular orbits.
Planets have elliptical orbits.
The eccentricity of a planet's orbit is proportional to its distance from the sun.
The period of a planet's orbit is proportional to its distance from the sun.
Question 16 (2 points)
Which of these is correct about the moon's motion around the earth?
Question 16 options:
Centrifugal force acting on the moon balances the force of the earth's gravity.
The moon is in free fall.
There is no gravity acting on the moon because it is in orbit.
The moon exerts no gravitational force on the earth.
Question 17 (2 points)
Which of the following objects do not have gravitational fields?
Question 17 options:
apple
boulder
cat
all objects have gravitational fields
Question 18 (2 points)
Which of the following will generate the largest gravitational field?
Question 18 options:
a paperclip
a dog
a computer
the Earth
Question 19 (2 points)
What happens to the gravitational force between two objects if the distance between them decreases?
Question 19 options:
The gravitational force increases.
The gravitational force decreases.
The gravitational force stays the same.
The gravitational force is not related to the distance.
Question 20 (2 points)
What happens to the gravitational force between two objects if the distance between them increases?
Question 20 options:
The gravitational force increases.
The gravitational force decreases.
The gravitational force stays the same.
The gravitational force is not related to the distance.
Question 21 (2 points)
What happens to the gravitational force between two objects if the mass of both increases?
Question 21 options:
The gravitational force increases.
The gravitational force decreases.
The gravitational force stays the same.
The gravitational force is not related to the distance.
Question 22 (2 points)
What happens to the gravitational force between two objects if the mass of both decreases?
Question 22 options:
The gravitational force increases.
The gravitational force decreases.
The gravitational force stays the same.
The gravitational force is not related to the distance.
Question 23 (2 points)
Which of these is generally considered to have been discovered by Einstein?
Question 23 options:
Mass bends space-time.
Space is empty.
An electric charge produces an electric field around it.
Gravity causes acceleration.
Question 24 (2 points)
Which of the following scientists is not involved with gravitation?
Question 24 options:
Einstein
Kepler
Newton
Curie
Question 25 (2 points)
What type of force is gravitational force?
Question 25 options:
field force
applied force
contact force
Answers
The required answers are stated below:
13. The force acting on the mass can be calculated by:
Force = mass x gravitational field
= 5.0 x 7.0
= 35.0 N
The force acting is 35.0 N. Thus, option A.
14. When the location of the arrows become closer to the mass, the arrows would become shorter. Option A.
15. Kepler's first law of planetary motion is: Planets have elliptical orbits. Option B.
16. The correct option is A. Centrifugal force acting on the moon balances the force of the earth's gravity.
17. Considering the given options, all the objects have gravitational fields. Thus option D.
18. The Earth will generate the largest gravitational field. Option D.
19. When the distance between two objects decreases, the gravitational force between them increases. Option A. The gravitational force increases.
20. When the distance between two objects increases, the gravitational force between them decreases. Option B. The gravitational force decreases.
21. When the mass of two objects increases, the gravitational force between them increases. Option A. The gravitational force increases.
22. When the mass of two objects decreases, the gravitational force between them decreases. Option B. The gravitational force decreases.
23. Einstein discovered that: Gravity causes acceleration. Option D
24. The scientist from the given options that is not involved with gravitation is Curie. Option D.
25. Force field is a type of force that do not require contact before it can be felt. Gravitational force is a field force. Option A.
Visit: https://brainly.com/question/25243297
(a) A car with a mass of 950 kg is moving to the right with a constant speed of 1.65 m/s. What is the total force on the car
Answers
Answer:2094 ibs
I hope this helps! Please give it a <3
17. Saan daw nakasakay ang mga Austronesyan nang dumating sa bansa? A. Bangka B. balangay C galyon D. barko
this is a.p ok
Answers
Answer:
D.barko po
Explanation:
I trying my best
help me please!
The graph of an object's position over time is a horizontal line and y is not equal to 0. What must be true about the object's motion?(1 point)
A. The velocity is zero.
B. The acceleration is constant and non-zero.
C. The velocity is constant and non-zero.
D. The acceleration is negative.
Answers
Answer:
Explanation:
1.) Students are going to conduct an experiment to study the effect of a net force applied to an object on the object’s motion. In each trial of the experiment, the students will apply a net force on the object. They also need to take two other measurements. What are the other quantities they should measure in each trial of the experiment?
ANSWER: mass and acceleration
2.) Use the data table to answer the question. It shows the acceleration of a body when a net force is applied to it.
Net force (N) Mass (kg) Acceleration (m/s2)
5.0 5.0 1.0
10.0 5.0 2.0
20.0 5.0
Which value would complete the last cell?
ANSWER: 4.0
3.) Which statement makes an accurate comparison of the motions for objects C and D?
ANSWER: Object C has an acceleration that is greater than the acceleration for D.
4.) Use the equation for motion to answer the question.
x=x0+v0t+12at2
An object has a starting position of 2 m, a starting velocity of 15 m/s, and is moving at a constant speed. Which option shows the final position of the object after 1 s?
ANSWER: 17 m
5.) The graph of an object's position over time is a horizontal line and y is not equal to 0. What must be true about the object's motion?
ANSWER: The velocity is zero.
hope this helps <3
As the graph shows, position over time is a horizontal line and y is not equal to 0 then the velocity is zero. Hence, option A is correct.
What is Acceleration?Acceleration is the rate at which the speed and orientation of a moving object change over time. When a spot or object moves faster or slower along a straight line, it is said to be accelerated. Even though the speed is constant, motion on a circle accelerates so because the direction is always shifting. Both by and to acceleration for all other types of motion.
It is a vector quantity because it has both magnitude and direction.
If the graph of an object's position over time is a horizontal line also y is not equal to 0 then it means that the velocity is zero, it cannot be constant or non-zero.
Therefore, it concludes that the velocity is zero and option A is correct.
To know more about Acceleration:
https://brainly.com/question/12550364
#SPJ2
How could scientists investigate why flying squirrels fluoresce?
Answers
Answer:The reasons for the squirrels to fluoresce pink is still under investigation, but communication and camouflage are two top contenders for why this might be happening, the team has hypothesized. “They could be communicating with members of their own species by showing off their fluorescence to each other, or it might be a sort of mating display,”
is this what you are looking for
Explanation:
Answer:
Left to right: Northern Flying Squirrel (Bruce Museum Collection), UV lit photo of Northern Flying Squirrel at feeder, UV lit photo of Northern Flying Squirrel climbing tree.Over time, uroporphyrin builds up in their bones and teeth, leading them to fluoresce a bright pink color when exposed to ultraviolet light.
Explanation:
2. A bullet traveling at 8.0 x 10 2 m/s horizontally hits a target 180 m away. How far does the
bullet fall before it hits the target?
Answers
Answer:
Explanation:
The bullet travels for a time of
180 m/800 m/s = 0.225 s
Assuming the original velocity was horizontal
h = ½(-9.8)0.225² = 0.25 m
The bullet will accelerate as it descends at the same rate that it slowed down as it rose, since gravity is constant (i.e., it doesn't vary). It will therefore be travelling at the same speed as when it was first fired from the gun when it reaches the bottom.
What far does the bullet fall before it hits the target?As soon as the gun is discharged, the propellant in the barrel expands, speeding up the bullet. The bullet is no longer propelled once it exits the muzzle since the gasses can now escape outside and the bullet is now encountering air resistance. Therefore, the muzzle velocity at the barrel's exit is the highest it can be.
A bullet thrown straight up on Earth would be able to reach a maximum height of around three kilometres (about 10,000 feet (ca. 3 km)), assuming there is no wind, before falling back to Earth.
Therefore, The bullet travels for a time of 180 m/800 m/s = 0.225 s assuming the original velocity was horizontal h = ½(-9.8)0.225² = 0.25 m.
Learn more about bullet here:
https://brainly.com/question/29027629
#SPJ2
What type of reflection would you get from a rough surface?
Answers
For a rough surface, reflected light rays scatter in all directions. This is called diffuse reflection. Diffuse reflection is when light hits an object and reflects in lots of different directions. This happens when the surface is rough.
What is role of force according to Newton's second Law? full answer
Answers
Mga tanong 1. Ano ang nangyari sa lobo? 2. Sa iyong palagay, saan napunta ang pumutok na lobo? 3. Kapag pumutok ang lobo ano ang lalabas? 4. Kung kulay pula ang lobo kulay pula din ba ang hanging lalabas dito? Bakit?
Answers
Answer:
1. Pumutok ang Lobo
2.basurahan
3.may kwentong po ba to paano ko masagot ng wala naman akong mababasang kwento :) :) :)
Calculate that object's net displacement over the time shown.
a. 540 m
b. 2,520 m
c. 2,790 m
d. 5,040 m
Answers
Answer:
c
Explanation:
im sorry if im wrong
mark me as brainlist please thank you
A mass m is released from a height h above the ground. It is given an initial horizontal velocity of magnitude v0. What is the speed of the mass when it hits the ground
Answers
The speed of the mass when it hits the ground from the given height is [tex]\sqrt{2gh}[/tex].
The given parameters:
mass of the object, = mheight of fall = hinitial horizontal velocity, = V₀The final velocity of the ball when it hits the ground is calculated as follows;
[tex]v_f^2 = v_0_y^2 + 2gh\\\\[/tex]
where;
[tex]v_0_y[/tex] is the initial vertical velocity velocity = 0g is the acceleration due to gravity = 9.8 m/s²[tex]v_f^2 = 0 + 2gh\\\\v_f^2 = 2gh\\\\v_f = \sqrt{2gh}[/tex]
Thus, the speed of the mass when it hits the ground from the given height is [tex]\sqrt{2gh}[/tex].
Learn more about final velocity here: https://brainly.com/question/17956487
What energy transformation takes place when you turn on an electric light?
A) chemical-light-heat
B) chemical- electrical- heat
C) mechanical-light-heat
D) electrical-light-heat
Answers
Answer:
D) electric-light-heat
100 POINTS
Please answer this ASAP!!!!
Answers
Answer:
I would say the average kinetic energy and the temperature.
Explanation:
Hope this helps:) Good luck!!
The answer is B and D. As speed decreases, the temperature of the reaction decreases. Also, remember that kinetic is energy that it possesses due to its motion, so when we decrease the motion, we decrease the average kinetic energy.
I hope this helps! :)
Si la masa es 15.0 kg y la aceleración es 3.0 m/s^2, halla la fuerza en Newton.
Answers
By applying Newton's Second Law of Motion, the force acting on the mass is 45.0 Newton.
Given the following data:
Mass = 15.0 kilogramsAcceleration = 3.0 [tex]m/s^2[/tex]To determine the force acting on the mass in Newton, we would apply Newton's Second Law of Motion:
Newton's Second Law of Motion states that the acceleration of an object is directly proportional to the net force acting on the physical object or body, and inversely proportional to its mass.
Mathematically, Newton's Second Law of Motion is given by this formula;
[tex]Force = mass \times acceleration[/tex]
Substituting the given parameters into the formula, we have;
[tex]Force = 15.0 \times 3.0[/tex]
Force = 45.0 Newton
Read more here: https://brainly.com/question/24029674
There are several ways to model a compound. One type of model is shown. 4 C's are connected in a line by 3 black lines. The C on the left has 3 H's attached to it each by a black line. The next C has 1 H attached by a black line and 1 O attached by 2 black lines. The next C has 2 H's attached to it by 1 black line each. The last C has 2 H's attached to it by 1 black line each and 1 O attached by a single black line. That O has an H attached to it by 1 black line. What is the chemical formula for the molecule represented by the model? CHO C4H9O2 C4H8O C3H8O2
Answers
Answer:
The chemical formula for the molecule is [tex]C_4H_9O_2[/tex]
Explanation :
Molecular formula : It is the chemical formula which depicts the actual number of atoms of each element present in the compound.
Structural formula : It is a formula in which the lines are used between the bonded atoms and the atoms are also shown in the structural formula.
In the structural formula, the lines are used between the atoms.
As per given information of compound we conclude that, there are 4 carbon atoms, 9 hydrogen atoms and 2 oxygen atoms.
Thus, the chemical formula for the given molecule will be, [tex]C_4H_9O_2[/tex]
Answer:
B is the answer
Explanation:
What is the difference between current and voltage?
Answers
Answer:
Voltage is the potential difference between two points in an electric field, which causes current to flow in the circuit. Current is the rate of flow of electrons.
Which statement is true about all liquids? (1 point) O They can change in volume and shape. They keep their volume but can change shape O They keep their shape but can change volume. O They keep their shape and volume
Answers
The second statement is true about liquids i.e. they keep their volume but can change shape.
The volume retention and conformity to the shape of a liquid's container are two of its most noticeable physical characteristics. When a liquid substance is poured into a container, it conforms to the shape of the container and will stay inside the container so long as the liquid state persists.Liquids do not have a set shape, only a fixed volume.You can compress liquids but to compress them, a lot of pressure is needed.Compared to solids, liquids have lower densities.The attraction between molecules is weaker than that between solids.There is a lot of room between the particles.To know more about liquid
https://brainly.com/question/20319960
#SPJ1
For anyone taking the Velocity and Acceleration Quick Check, Here are the answer.s!
1. Question: Students are going to conduct an experiment to study the effect of a net force applied to an object on the object’s motion. In each trial of the experiment, the students will apply a net force on the object. They also need to take two other measurements. What are the other quantities they should measure in each trial of the experiment?
1. Answer: mass and acceleration
2. Question: Which statement makes an accurate comparison of the motions for objects C and D?
2. Answer: Object C has an acceleration that is greater than the acceleration for D.
3. Question: An object has a starting position of 2 m, a starting velocity of 15 m/s, and is moving at a constant speed. Which option shows the final position of the object after 1 s?
3. Answer: 17 m
4. Question: The graph of an object's position over time is a horizontal line and y is not equal to 0. What must be true about the object's motion?
4. Answer: The velocity is zero.
Hope this helps anyone!!
Answers
Answer:
this is 100% correct
Explanation:
All good if you have 4 questions.
1. Mass and Acceleration
2. Object C has an acceleration that is greater than the acceleration for D.
3. 17 m
4. The velocity is zero.
OR...if you have 5 questions...
1. Mass and Acceleration
2. 4.0
3. Object C has an acceleration that is greater than the acceleration for D.
4. 17 m
5. The velocity is zero.
Hope this helps!
Pls help need asap thx!
Answers
Answer:
I think its the 3rd one if its not im sorry lol
Explanation: guess
g A small ball is tied to one end of a light 2.5-m wire, and the other end of the wire is hooked to the ceiling. A person pulls the ball to the side until the wire makes an angle of 35° with the plane of the ceiling and then gently releases it. What is the angular speed of the ball, in rad/s, as it swings through its lowest point?
Answers
The angular speed of the ball as it swings through its lowest point is 1.8 rad/s.
The given parameters;
radius of the circular path, r = 2.5 m
angle with the vertical, θ = 35⁰
The angular speed of the ball, as it swings through its lowest point is calculated as follows;
[tex]Tcos \theta = m\omega ^2 r\\\\mgcos \theta = m \omega ^2 r\\\\gcos \theta = \omega ^2 r\\\\\omega ^2 = \frac{gcos \theta }{r} \\\\\omega = \sqrt{\frac{gcos \theta }{r} } \\\\\omega = \sqrt{\frac{9.8 \times cos (35) }{2.5} } \\\\\omega = 1.8 \ rad/s[/tex]
Thus, the angular speed of the ball as it swings through its lowest point is 1.8 rad/s.
Learn more here:https://brainly.com/question/12898117
1. What type of myth does almost every culture have?
A a myth about the desert
B a myth about creation
C a myth about the ocean
D a myth about cobras
Answers
Answer:
B. a myth about creation
Explanation:
What is the melting pont of a champurrado?
Answers
Answer:
Well If the unknown is one of four possible compounds which melt at 102, 104, 106, and 108° C, it is most likely that which melts at 108° C. To summarize, an impure solid melts over a wide range and at a temperature lower than that of the pure solid.
Explanation:
I have known this since grade school
What is the force of Friction Between A plack of ice those weighs 950N And The ground if ù = 0.127 A 65N B. 114N C. 175N. D. 226N
Answers
pic attached !!
hope it helps..(ʘᴗʘ✿)
The Earth's plates moved over millions of years, bringing continents and other
features of the Earth to their present arrangement.
How is this movement of the lithosphere explained?
continental drift
• the principle of superposition
• the theory of plate tectonics
nuclear fusion
Answers
Answer:
theory of plate tectonics
Explanation:
Answer:
What he said above me
Explanation:
I did the test and it was right
i need heelp plz can anyone heelp me
