Answer:
3.57 units
Explanation:
[tex]x =\sqrt{ (-1.55)^2+(3.22)^2} = 3.57 units[/tex]
Answer:
The magnitude of the vector is 3.57 units.
Explanation:
The x component of the vector, [tex]v_x=-1.55\ \text{units}[/tex]
The y component of the vector is [tex]v_y=3.22\ \text{units}[/tex]
We need to find the magnitude of the vector. We know that the magnitude of the vector is given by :
[tex]v=\sqrt{v_x^2+v_y^2}[/tex]
[tex]v=\sqrt{(-1.55)^2+(3.22)^2}[/tex]
[tex]v=3.57\ \text{units}[/tex]
So, the magnitude of the vector is 3.57 units. Hence, this is the required solution.
What an object at rest stays at rest and an object in motion with the same speed and in the same direction unless acted upon by an unbalanced force is newton's 1st law of motion?
True
Or
False
Answer:
True.
Explanation:
Newton's First Law of Motion states that every object continues in it's state of rest or of uniform motion in a straight line unless acted upon by an external force.
What type of power plant burns material to make electricity?
Answer:
A fossil fuel power station is a thermal power station which burns a fossil fuel, such as coal or natural gas, to produce electricity. Fossil fuel power stations have machinery to convert the heat energy of combustion into mechanical energy, which then operates an electrical generator.
Explanation:
EL. A white ball with mass 143 g is moving at a velocity of 7.9 m/s.
CS
It collides with a red ball with mass of 150 g.
The red ball is stationary before the collision. The white ball stops after the collision.
Calculate the velocity of the red ball after the collision.
Give your answer to two significant figures.
Answer:
[tex]\displaystyle v_2'=7.5\ m/s[/tex]
Explanation:
Conservation Of Linear Momentum
The total momentum of both balls won't change regardless of their interaction while no external forces are acting on the system. We'll use the following variables m1,m2,v1,v2,v1',v2' for the mass of the white ball, the mass of the red ball, their velocities before the collision, and their velocities after the collision, respectively .
The provided data is as follows:
[tex]\displaystyle m_1=143\ gr=0.143\ kg[/tex]
[tex]\displaystyle v_1=7.9\ m/s[/tex]
[tex]\displaystyle m_2=150\ gr=0.15\ kg[/tex]
[tex]\displaystyle v_2=0[/tex]
[tex]\displaystyle v_1'=0[/tex]
To preserve the total linear momentum, the following equation must stand
[tex]\displaystyle m_1\ v_1+m_2\ v_2=m_1\ v_1'+m_2\ v_2'[/tex]
Solving for [tex]v_2'[/tex]
[tex]\displaystyle v_2'=\frac{m_1\ v_1+m_2\ v_2-m_1\ v_1'}{m_2}[/tex]
[tex]\displaystyle v_2'=\frac{0.143(7.9)+0-0}{0.15}[/tex]
The final speed of the red ball is
[tex]\boxed{\displaystyle v_2'=7.5\ m/s}[/tex]
Final answer:
The final velocity of the red ball after the collision, calculated using conservation of momentum, is approximately 1.13 m/s to two significant figures.
Explanation:
Using the principles of conservation of momentum, we can solve for the final velocity of the red ball after the collision. The formula for conservation of linear momentum in a two-object system is m1v1 + m2v2 = m1v1' + m2v2', where m represents mass, v represents initial velocity, and v' represents final velocity. Since the white ball (m1 = 143 g) stops after the collision, its final velocity is 0 m/s. The red ball (m2 = 150 g) is initially stationary, so v2 = 0 m/s. From the data given, we can set up the equation as follows:
143 g × 7.9 m/s + 150 g × 0 m/s = 143 g × 0 m/s + 150 g × v2'
Solving for v2' (the final velocity of the red ball), we get v2' = (143 g × 7.9 m/s) / 150 g. Converting grams to kilograms to use SI units, we calculate:
v2' = (0.143 kg × 7.9 m/s) / 0.150 kg
v2' = 1.13 m/s.
The velocity of the red ball after the collision is approximately 1.13 m/s to two significant figures.
13. Bari kicked a ball and its leaves the ground at an angle 30° with a velocity of 20 m/s.
Find hang time of the ball
11 Pari Iricked a ball and its leaves the ground at an angle 30° with a velocity of 20. m/s.
I have a physics test upcoming and I’m particularly stuck on this question and I would be grateful if anyone could help me out.
Answer:
The hang time is 2.04 seconds
Explanation:
2-D Motion
It referred to as a situation where an object is launched in such a way it describes a curve, reaches a top height and then returns to ground level after traveling a certain distance x away from the launch point.
Let [tex]v_o[/tex] be the launching speed forming an angle [tex]\theta[/tex] with the horizontal reference. The hang time (time the object remains in the air) is given by
[tex]\displaystyle t_h=\frac{2V_{oy}}{g}[/tex]
Since
[tex]\displaystyle v_{oy}=v_o\ sin\theta[/tex]
Then
[tex]\displaystyle t_h=\frac{2v_o\ sin\theta }{g}[/tex]
We'll use the given values
[tex]\displaystyle v_o=20\ m/s\ ,\ \theta =30^o[/tex]
[tex]\displaystyle t_h=\frac{2(20)sin30^o}{9,8}[/tex]
[tex]\displaystyle t_h=2.04\ sec[/tex]
The hang time is 2.04 seconds
What is the kinetic energy of a 50-kg child running to catch the school bus at
2 m/s?
O A. J
O B. 25 J
O C. 100J
O D. 200
Answer:
Option C
100 J
Explanation:
Kinetic energy, KE is given by
[tex]KE=0.5mv^{2}[/tex] where m is the mass and v is the velocity
Substituting 50 Kg for mass, m and 2 m/s for velocity v then we obtain
[tex]KE=0.5*50*2^{2}=100 J[/tex]
Therefore, the child's kinetic energy is equivalent to 100 J
Answer:100J
Explanation:
Can somebody match the following please I need to pass this class
Answer:
Explanation:
B)2) Statosphere
E) 5) Exosphere
A) 1) Troposphere
C)3) Mesosphere
D) 4) Thermosphere
1. An object is moving in a straight line at constant speed. Which of the following is true?
There are no forces acting on the object.
The object has 0 acceleration.
The object has constant velocity.
a. I only
b. ll only
c. II and III only
d. I, II, and III
c. II and III only (the object has 0 acceleration and the object has constant velocity.)
Why?
Let's discard each of the given options to find the correct one(s).
- There are no forces acting on the object:False, if an object has a constant speed, it does not mean that there are no forces acting on it, in fact, there will be always acting forces, like frictional force, gravity force, air resistance, and others.
- The object has a 0 acceleration:True, in an object is moving at constant speed, it means that there is no acceleration, the speed will be the same all the time during motion.
- The object has constant velocity:True, if an object is moving in a straight line at constant speed the velocity will be also constant. The velocity of an object is referring to its speed and its direction, if the object is moving in a straight line, the direction will be the same, so, if the speed is constant, the velocity will be also constant.
Have a nice day!
What is the distance traveled between 0 s and 30 s?
Answer:
0m
Explanation:
In physics this is 0m, why?
Okay so, you moved 60 meters (in position/m) the first 10 seconds (sec) and then between 10 and 15 seconds, you took a brake and didn't move. (The graph is still because the time is constant and your motion is 0 meters).
When 15 seconds have passed, you go back where you were, exactly at 0 meters, your initial position.
In reality would this be 60 meters + 60 meters back which would be 120 meters, or 0.12km if you will. But in physics world, it's 0 meters in position.
Hope you understood!
Good luck!
Astrophysicist Dr. D
Answer:
120 m
Explanation:
The displacement from 0 s to 30 s is 0 m, since the change in position between those points is 0 m. However, we are asked to find the distance traveled, not the displacement.
The object travels 60 m forward, then 60 m backward. So the total distance traveled is 120 m.
Which statements describe both male and female reproductive systems? Check all that apply. A:The reproductive system produces hormones. B:The reproductive system transports reproductive cells. C:The reproductive system produces reproductive cells. D:The reproductive system includes the urinary bladder. E:The reproductive system develops and nourishes a developing baby.
Answer: A:The reproductive system produces hormones.
B:The reproductive system transports reproductive cells.
C:The reproductive system produces reproductive cells.
Explanation:
A:The reproductive system produces hormones. : The reproductive organs ovaries in females and testes in males produces hormones. The ovaries produce estrogen and progesterone and testes produce testosterone.
B:The reproductive system transports reproductive cells. : The ovaries in females transfers an egg into the fallopian tube and testes in males secrete sperms at the time of copulation the fertilization of egg and sperm leads to the development of zygote the precursor of new life.
C:The reproductive system produces reproductive cells.: The ovaries undergo oogenesis and in testes spermatogenesis takes place to develop egg and sperms respectively.
The statements describing the reproductive system are production of hormones and gamete along with the transport. Thus, statements A, B and C are correct.
The reproductive system has been the organ system in the human body that has been function for the reproduction of the organism.
Functions of Reproductive systemThe reproductive system in males has been comprised of testes that produces the male hormones' testosterone. The female reproductive system has been comprised of the ovaries that has been producing estrogen and progesterone.
The male and female reproductive system are responsible for producing male and female gamete and transport them for reproduction.
Thus, the statements describing the reproductive system are production of hormones and gamete along with the transport. Thus, statements A, B and C are correct.
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what is the displacement for a person that walks 3.0km north and 8.0 km south
Answer:
5 km
Explanation:
x = |3 - 8| = 5 km
Help Meeeeee
Two kids are roller skating. Amy, with a mass of 55 kg, is traveling forward at 3 m/s. Jenny, who has a mass of 40 kg, is traveling in the opposite direction at 5 m/s. They crash into each other and hold onto each other so that they move as one mass. How fast are they traveling?
Answer:
0.4 m/s
Explanation:
From the law of conservation of momentum, the sum of initial momentum equals the sum of final momentum
Momentum, p=mv where m is the mass and v is the velocity
[tex]m_1v_1+m_2v_2=(m_1+m_2)v_c[/tex] where [tex]v_c[/tex] is the common velocity, [tex]v_1[/tex] and [tex]v_2[/tex] are velocities of Amy and Jenny respectively, [tex]m_1[/tex] and [tex]m_2[/tex] are masses of Amy and Jenny respectively.
Taking forward direction as positive, opposite direction is negative hence [tex]v_1[/tex] is 3 m/s while [tex]v_2=-5 m/s[/tex]
[tex]55 kg\times 3 m/s +(40 kg\times -5 m/s)=(55 kg+40 kg)v_c[/tex]
[tex]95 kg v_c=-35 kg.m/s[/tex]
[tex]v_c=\frac {-35}{95}=-0.368421053 m/s\approx -0.4 m/s[/tex]
Therefore, they travel at 0.4 m/s in the direction of Jenny's movement
Helppp me please !!
Answer:
the frequency of this light is [tex]1.5\,\,10^{16}[/tex] Hz (which coincides with the fourth option listed among possible answers)
Explanation:
Recall the relationship between wavelength and frequency of radiation based upon the speed of light in vacuum:
[tex]frequency\,*\,wavelength\,=\, speed\,\,of\,light\\frequency\,*\,wavelength\,=\,3\,\,10^8\,\frac{m}{s} \\frequency\,*\,20 \,\,10^{-9}\,m\,=\,3\,\,10^8\,\frac{m}{s}\\frequency\, =\,\frac{3\,\,10^8}{2\,\,10^{-9}} \,\frac{1}{s} \\frequency\,=1.5\,\,10^{16}\,\,Hz[/tex]
In the process shown above, we have written the speed of light in meters per second, and also converted the 20 nano-meters into meters, in order to reduce SI units properly and have the result shown in units of 1/second (that is hertz's - abbreviate "Hz")
Analyze the following terms and phrases about solar activity. Select the two that represent correct matches between cause and effect.(1 point)
a) solar activity -- sudden eruptions of large bubbles of plasma and magnetic energy
b) coronal mass ejection -- relatively cool spot on surface of the sun
c) sun's magnetic field -- uneven churning of the sun's gravitational field
d) solar flare -- sudden release of magnetic energy
e) sunspot -- magnetic field of the sun emerges as a loop
Answer:
a) solar activity -- sudden eruptions of large bubbles of plasma and magnetic energy
and
d) solar flare -- sudden release of magnetic energy
Explanation:
We can start by eliminating the options that are definitely wrong.
A coronal mass ejection is not a relatively cool spot on surface of the sun, in fact such a spot is a sunspot, while a coronal mass ejection occurs when the magnetic field of the sun emerges as a loop. Thus, both options B and E are incorrect, leaving only A, C, and D. Option C makes no sense, as the sun's gravitational field does not 'churn'. Thus, only options A and D are left. A closer look at A and D reveals they are correct; solar flares are in fact sudden releases of magnetic energy, as seen in this quote from UC Berkeley's website; "Solar flares are caused by sudden changes of strong magnetic fields in the Sun's corona.". And solar activity is a blanket term for the effects of eruptions of plasma and magnetic energy from the sun.
Saul is in Germany, driving on the
Autobahn. He drives 50 km in fifteen
minutes. How fast is Saul driving?
a. 50 km/h
b. 100 km/h
c. 200 km/h
d. 400 km/h
Answer: c
Explanation:Use equation for speed: V=S/t
S=50 km -distance
t=15 min=0.25h -time
V=?
------------------------
V=S/t
V=50km/0.25h
V=200km/h
What are the top three osha cited ladder violations
Answer: not having a portable ladder extend 3 feet above the landing
improper use of the top of step ladders
lack of work or training
Explanation: career safe online
The top three OSHA cited ladder violations are improper maintenance, improper use, and missing fall protection systems, endangering worker safety.
These violations are common because they relate to fundamental ladder safety. Maintaining a ladder's condition is crucial to ensure it's safe for use. Inadequate ladder use includes actions that increase the risk of falls, such as reaching too far or using a ladder not designed for the task.
Missing fall protection is a serious violation, especially when working at heights where a fall could lead to severe injuries or fatalities. Employers must ensure proper ladder training, maintenance, and use, and provide the necessary safety equipment to protect workers from fall hazards. Violations in these areas can result in OSHA citations and penalties.
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sound is heard louder in newly furnished room ,why?
calculate the magnitude of impulse applied to a 0.75 kilogram cart to change its velocity from 0.50 meters per second east to 2.00 meters per second east
Answer:
1.125 N s towards East
Explanation:
since both velocities are in same direction hence change in velocity is
Δ V = final - initial
= 2.00 - 0.50
= 1.50 towards East
impulse = change of linear momentum
= mass × change in velocity
= 0.75 ×1.50
= 1.125 N s towards East
Which of the following is the dot product of u = 4i + 6j – 5k and v=-10i – 8j + 10k?
Answer:
[tex]\vec u\ . \ \vec v=-138[/tex]
Explanation:
Dot Product of Vectors
The dot product of two vectors is also known as scalar product. Given the vectors
[tex]\vec u=4\hat i+6\hat j-5\hat k[/tex]
[tex]\vec v=-10\hat i-8\hat j+10\hat k[/tex]
The dot product is the sum of the products of each component separately
[tex]\vec u\ . \ \vec v=(4)(-10)+(6)(-8)+(-5)(10)[/tex]
[tex]\vec u\ . \ \vec v=-40-48-50=-138[/tex]
Rodney is trying out one of Santa's new games that consists of three pieces that blow apart if the wrong key is inserted into the door. The elf picks the wrong key and the board explodes. One piece of mass 2 kg goes off at an angle of 60° from the horizon at 10 m/s. A second piece of mass 1.2 kg travels at an angle of 180° and is moving at 15 m/s.
a) find the momentum of the third piece.
b) find the velocity of the third piece if it's mass is 3 kg.
a) The momentum of the third piece is 19.1 kg m/s
b) The velocity is 6.4 m/s at an angle of [tex]-65^{\circ}[/tex]
Explanation:
a)
We can solve this problem by applying the law of conservation of momentum in 2D. In fact, the total momentum of the board before the explosion must be equal to the total momentum of the 3 pieces after the explosion.
Before the explosion, the total momentum is zero, since the board is at rest. Resolving into the x- and y- components, this means that the two components of the momentum are zero:
[tex]p_x = 0\\p_y = 0[/tex]
After the explosion, we have:
[tex]p_x = (2 kg)(10 m/s)( cos 60^{\circ}) + (1.2 kg)(15 m/s)(cos 180^{\circ})+p_{3x}[/tex]
where [tex]p_{3x}[/tex] is the x-component of the momemtum of the 3rd piece. By solving,
[tex]p_x = -8+p_{3x}[/tex]
And since the x-momentum must be conserved,
[tex]0=-8+p_{3x} \rightarrow p_{3x}=8 kg m/s[/tex]
Similarly, along the y-axis,
[tex]p_y = (2 kg)(10 m/s)( sin 60^{\circ}) + (1.2 kg)(15 m/s)(sin 180^{\circ})+p_{3y}[/tex]
where [tex]p_{3y}[/tex] is the y-component of the momemtum of the 3rd piece. By solving,
[tex]p_y = 17.3+p_{3y}[/tex]
And since the y-momentum must be conserved,
[tex]0=17.3+p_{3y} \rightarrow p_{3y}=-17.3 kg m/s[/tex]
So now we can find the momentum of the third piece:
[tex]p_3 = \sqrt{p_{3x}^2+p_{3y}^2}=\sqrt{8^2+(-17.3)^2}=19.1 kg m/s[/tex]
b)
The momentum of the third piece is given by
[tex]p_3 = m v_3[/tex]
where
m = 3 kg is the mass of the piece
[tex]v_3[/tex] is the velocity
Solving for [tex]v_3[/tex], we find
[tex]v_3 = \frac{p_3}{m}=\frac{19.1}{3}=6.4 m/s[/tex]
We can also find the direction, which is identical to the direction of the momentum, by using the following equation:
[tex]\theta = tan^{-1}(\frac{p_{3y}}{p_{3x}})=tan^{-1}(\frac{-17.3}{8})=-65^{\circ}[/tex]
So, the third piece flies off at 6.4 m/s at an angle of [tex]-65^{\circ}[/tex].
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Two substances were mixed and there was a color change and small flames. What can you infer happened?
A physical property was observed
A chemical change occurred
A change in state from solid to liquid
Matter was destroyed
A chemical change occurred
Explanation:
There are two types of changes, physical changes and chemical changes:
A chemical change occurs when the nature of a substance changes, and new substances are formed. This occurs when the bonds between molecules in the reactants break, and they re-form into new substance. A change in the colors of the substance involved is, for example, a sign that a chemical change occurredA physical change occurs when there is a change in state of a substance, but no new substances are formed. For instance, a physical change is the melting of ice, or the boiling of water, or the condensation of water..In this problem, two substances are mixed and there is a color change and small flames. The color change indicates the formation of new substances, so a chemical change has occurred. Moreover, the presence of small flames indicates that a chemical reaction has occurred (burning of oxygen), so a new substance has formed, so this is another indication of a chemical change.
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You push a book sitting on a desk with a force of 5 N, but the book does not move. What is the static friction?
Answer:
The static friction is 5 N acting in the direction opposite to that of the force of push.
Explanation:
Given:
A book lying on a table. Force of push is 5N.
Now, the book is not moving. This clearly means that some resistive force is acting in the opposite direction which has the same magnitude as that of the applied force, thus making the net force acting on the book equal to zero.
This resistive force acting in the opposite direction is called the static frictional force.
Therefore, the static friction acting on the book is equal to 5 N and acts in the direction opposite to that of the force of push.
John traveled East at 10 m/s for ten
seconds. He realized he had gone too
far and made a U-turn. He traveled
West at 5 m/s for six seconds. Calculate
John's displacement.
a. 30 m
b. 70 m
C. 100 m
d. 130 m
Answer:
Option D
130 m
Explanation:
From the concept of speed, distance=speed*time
When traveling East, displacement=10*10=100 m (since he takes 10 seconds while traveling at a speed of 10 m/s)
When traveling West, displacement=5*6=30 m (since John takes 6 seconds to travel at a speed of 5 m/s)
Total displacement=Displacement East+ Displacement West=100+30=130 m
A girl pushes a 10.0kg sled at a constant speed by applying a force of 75N at an angle of 30 degrees with respect to the horizontal. The sled is pushed over a distance of 15 meters. How much work is done by the force of friction?
Answer
given,
mass of sled = 10 Kg
Force applied by girl = ?
angle of inclination = 30°
distance = 15 m
Sled is moving with constant speed hence acceleration will be equal to zero.
now,
F - mg sin θ - f = m a
F - mg sin θ - f = 0
F - mg sin θ = f
where f is the frictional force acting opposite to the applied force
mg sin θ is the component of the weight which is opposing the motion of the sled
now,
f = F - mg sin θ
f = 75 - 10 x 9.8 x sin 30°
f = 26 N
now,
Work done = f. s cos ∅
where ∅ is the angle between frictional force and displacement which is equal to 180°
W= 26 x 15 x cos 180°
W = -390 J
work done by frictional force is equal to W = -390 J
The work done by child to move the system is 974.25 Joules.
The work done is given by an expression shown below,
[tex]Workdone=Force*Distance*Cos\theta[/tex]
Where [tex]\theta[/tex] angle between force and direction of displacement.
Given that, [tex]Force=75N,Distance=15m,\theta=30[/tex]
Substitute in above expression.
[tex]Workdone=75*15*cos(30)\\ \\ Workdone=75*15*0.866\\ \\ Workdone=974.25Joule[/tex]
Hence, the work done by child to move the system is [tex]974.25[/tex] Joules.
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In what way is a projectile (a ball thrown horizontally for example) using constant velocity motion?
Can someone please answer this?
Pleaseeeee❗️❗️❗️❗️
Answer:
The horizontal component of the velocity is always constant in accordance with the Newton's first law of motion since there is no other force acting in the horizontal direction.
Explanation:
A ball moving in projectile motion is under a variable resultant velocity on the object but the horizontal component of the velocity is always constant in accordance with the Newton's first law of motion since there is no other force acting in the horizontal direction. While a projectile motion the body is always under the influence of gravity and so its vertical component of velocity varies continuously. During the analysis of such a problem we always break the velocity components of the body for our ease of evaluation using the equations of motion.please help me i dont get it
The answers are:
39:
a - 1 mile
b - 0 miles
40:
[tex]a=-4\frac{m}{s^{2} }[/tex]
41:
[tex]Displacement=3.60 miles\\Distance=5 miles[/tex]
Why?
Solving 39:
To answer the questions, we need to remember that distance and displacement are different things. Distance refers to the total "ground" covered during motion, while displacement refers to how far is the object/body from its starting point.
So,
39:
a - the total distance traveled corresponds to the length of the track which is 1 mile.
b - The displacement is equal to 0 because they finished at the starting point, the distance between the starting and the finishing point is equal to 0.
40:
We can solve the problem using one of the given equations:
[tex]a=\frac{v_f-v_i}{t}[/tex]
Since we know all the information, we just need to substitute it into the equation:
[tex]a=\frac{v_f-v_i}{t}\\\\a=\frac{2\frac{m}{s} -16\frac{m}{s} }{3.5s}=\frac{-14\frac{m}{s} }{3.5s}\\\\a=-4\frac{m}{s^{2} }[/tex]
So, the car's acceleration was -4m/s2 (the car was reducing its speed)
41:
We can solve the problem using one of the given equations (Pythagorean Theorem):
[tex]c^{2}=a^{2}+b^{2}[/tex]
[tex]Displacement=\sqrt{(3mi(North))^{2}+(2miles(East))^{2}}\\\\Displacement=\sqrt{9+4}=\sqrt{13mi^{2}}=3.60miles[/tex]
The distance will be:
[tex]Distance=3mi+2mi=5miles[/tex]
Have a nice day!
Which statements accurately differentiate between dark matter and dark energy? Select the two correct answers.
a)Dark energy is the cause of the acceleration of the universe, while dark matter is the cause of the formation of structures.
b) There is much more dark matter in the universe, by mass.
c) Dark matter is the cause of the acceleration of the universe, while dark energy is the cause of the formation of structures.
d) Dark matter is black, while dark energy cannot be seen.
e) There is much more dark energy in the universe, by mass.
Answer:
a) Dark energy is the cause of the acceleration of the universe, while dark matter is the cause of the formation of structures.
e) There is much more dark energy in the universe, by mass.
Explanation:
Dark energy rises as an explanation of the accelerated expansion of the Universe, since it was expected that this slow down since The Big Bang, as a consequence of the gravitational attraction between the different objects (galaxies, planets, etc) but instead, the observations show how it is accelerating.
Dark matter in the other hand was born to explain why stars that were more farther for the supermassive black hole in the center of the Milky way galaxy didn't decrease their rotational velocity as it was expected.
[tex]v = \sqrt{\frac{G M}{r}}[/tex]
Where v is the rotational velocity, G is the gravitational constant, M is the mass inside the orbital radius, and r is the orbital radius.
If the distance increases the orbital speed decreases (inversely proportional).
Answer:a and e
Explanation:
When force is applied to an object, what happens
Answer:
The force on he object can cause an object to move or speed up. It can also make it stop or change direction.
Explanation:
Answer the question please
Answer:
B. solubility I think lmk if its wrong
Letti is having a problem in her experiment that she does not know how to solve. In order to move forward, Letti needs to be .
Answer:
In order to move forward, Letti needs to be creative.
Explanation:
Creative:
A person is said to be creative if that person has ability to think out of the box.
For example: if a person having a problem and instead of using traditional methods of solving the problem then that person thinks about news ideas then that person is creative,
As in our case, letti can use problem solving technique to find a solution of her problem.
Creative Problem technique:
It is such a problem solving method in which we use unconventional ways to get the solution of a problem. We analyze the problems with news view points so that we can reach at innovative ideas of solutions.
Answer: creative
Explanation: i just took the test
determine the proper unit for momentum using dimensionsal analysis
The unit for momentum is [tex]kg ms^{-1}[/tex]
Explanation:
The momentum of an object is defined as the product between the mass of the object and its velocity:
[tex]p=mv[/tex]
where
m is the mass of the object
v is its velocity
Let's determine the units for the momentum starting from the mass and the velocity:
The mass has units of kilograms, [tex]kg[/tex]The velocity has units of metres per second, [tex]ms^{-1}[/tex]Therefore, the unit for momentum is
[tex][p] = [m][v] = (kg)(ms^{-1}) = kg ms^{-1}[/tex]
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Final answer:
The proper unit for momentum, determined using dimensional analysis, is kilogram meters per second (kg·m/s), which is derived from the product of mass (in kilograms) and velocity (in meters per second).
Explanation:
To determine the proper unit for momentum using dimensional analysis, we first need to understand the physical definition of momentum. Momentum (π) is the product of an object's mass (m) and its velocity (v), thus having the formula π = m × v. According to SI units, mass is measured in kilograms (kg) and velocity in meters per second (m/s).
Performing dimensional analysis, we get:
Mass (m): [M] – SI unit: kg
Velocity (v): [LT−1] – SI Unit: m/s
Therefore, the dimensions of momentum are [M][LT−1] = [MLT−1]. When we multiply the units of mass and velocity, we get the unit of momentum as kilogram meters per second (kg·m/s), which is the proper unit for momentum.