Answers
Given data:
* The spring constant of the given spring is k = 25 N/m.
* The stretched length of the spring is x = 0.25 m.
Solution:
The magnitude of minimum force required to stretch the wire is,
\(\begin{gathered} F=kx \\ F=25\times0.25 \\ F=6.25\text{ N} \end{gathered}\)Thus, the magnitude of minimum force required in the given case is 6.25 N.
Related Questions
This is two or more elements chemically combined in a fixed ratio.
Example: water, carbon dioxide, sodium chloride
Answers
Which equation is most likely used to determine the acceleration from a velocity vs. time graph?
O a=
O m=
O a=
Om=
Δν
V₂-V1
X2-X1
AV
m
X2-X1
V₂-V1
Answers
The equation most likely used to determine acceleration from a velocity vs. time graph is a = Δv / Δt.
Acceleration is a fundamental concept in physics that refers to the rate at which an object's velocity changes over time. It is defined as the change in velocity divided by the change in time.
Mathematically, acceleration (a) is given by the equation:
a = Δv / Δt
where:
a represents acceleration
Δv represents the change in velocity (the difference between the final velocity and the initial velocity)
Δt represents the change in time (the difference between the final time and the initial time)
In this equation, "a" represents acceleration, Δv represents the change in velocity, and Δt represents the change in time. By calculating the ratio of the change in velocity to the change in time, we can determine the average acceleration over that time interval.
Therefore, The most likely equation used to calculate acceleration from a velocity vs. time graph is a = Δv /Δt.
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Science has been wrong in the past. For example, we now know that the original models of the atom were not fully correct. In response to this, a friend tells you, "Science cannot be trusted. Don't believe anything a scientist says." What is your response to this statement? (For full credit, you need to write at least a full sentence explanation"
Answers
Although it is true that scientific models and hypotheses have been updated and improved over time, this is not sufficient justification to reject science as a whole or to doubt what scientists claim.
Given that we are aware of their limitations, why do scientists continue to employ atomic model simulations?Models aid in our comprehension of systems and their characteristics. An atomic model, for instance, depicts what an atom's structure may like based on what is known about how atoms function. It may not accurately represent the precise makeup of an atom. Models are frequently condensed.
Why do scientific theories alter over time, including the atomic model?Over time, this atomic model has evolved. The model was used by scientists to make predictions. Their trials occasionally yielded unexpected outcomes that did not match the pre-existing model. The model was modified by scientists so that it could account for the fresh data.
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At which point is potential energy greatest?
Answers
Answer:
highest point
Explanation:
Potential energy is greatest when the most energy is stored. This could be when an object reaches its highest point in the air before falling, a rollercoaster just before it drops, or when a rubber band is stretched as far back as possible before it snaps.
An electric field of 2.09 kV/m and a magnetic field of 0.358 T act on a moving electron to produce no net force. If the fields are perpendicular to each other, what is the electron's speed?
Answers
Answer:
The velocity is \(v = 5838 \ m/s\)
Explanation:
From the question we are told that
The electric field is \(E = 2.09 kV/m = 2.09 *10^{3} \ V/m\)
The magnetic field is \(B = 0.358 \ T\)
Generally the force experienced by the electron due to the magnetic field is
\(F_m = qvB\)
Generally the force experienced by the electron due to the electric field is
\(F_e = qE\)
Since from the question the net force is zero then
\(F_e = F_m\)
=> \(v = \frac{E}{B}\)
Substituting values
\(v = \frac{2.09*10^{3}}{0.358 }\)
\(v = 5838 \ m/s\)
A river flows at 2m/s the velociy of ferry relative to the shore is 4m/s
Answers
Answer:
Explanation:
.....
Which statement describes friction?
Answers
Answer:
include the statements pls so i can choose wich one it is and tell you
Explanation:
Why was miasma theory replaced?
Answers
Hope that helps!
The distance between a loudspeaker and the left ear of a listener is 2.70 m. (a) Calculate the time required for sound to travel this distance if the air temperature is 20 oc. (b) Assuming that the sound frequency is 523 Hz, how many wavelengths of sound are contained in this distance
Answers
Answer:
Explanation:
Distance covered by sound = 2.7 m
speed of sound at 20⁰C = 343 m /s
time take by sound to cover the distance = distance / speed
= 2.7 / 343
= 7.87 ms . ( millisecond )
b )
Wavelength of sound = speed / frequency
= 343 / 523 m
= .6558 m
= 65.58 cm
Distance = 2.70 m = 270 cm
No of wavelengths contained in the distance
= 270 / 65.58
= 4.11 or 4 wavelengths ( by rounding off to digit )
The time taken by sound and the wavelengths of sound is required.
Time taken is \(0.00787\ \text{s}\)
The number of wavelenghts is 4.
s = Distance = 2.7 m
v = Speed of sound at \(20^{\circ}\text{C}\) = 343 m/s
Time is given by
\(t=\dfrac{s}{v}\\\Rightarrow t=\dfrac{2.7}{343}\\\Rightarrow t=0.00787\ \text{s}\)
f = Frequency = 523 Hz
Wavelength is given by
\(\lambda=\dfrac{v}{f}\\\Rightarrow \lambda=\dfrac{343}{523}\\\Rightarrow \lambda=0.66\ \text{m}\)
The wavelength is 0.66 m.
n = Number of wavelengths
\(n\lambda=s\\\Rightarrow n=\dfrac{s}{\lambda}\\\Rightarrow n=\dfrac{2.7}{0.66}\\\Rightarrow n\approx 4\)
The number of wavelenghts is 4.
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what do you understand by Force,acceleration and mass??
Answers
Answer:
Force is a push or pull that an object can exert on other objects. Acceleration is the rate of change of an object's speed and Mass is the amount of matter in an object and is expressed in kilograms.Explanation:
It is summarized by the equation: Force (N) = mass (kg) × acceleration (m/s2).A ball with a mass of 0.585 kg is initially at rest. It is struck by a second ball having a mass of 0.420 kg , initially moving with a velocity of 0.270 m/s toward the right along the x axis. After the collision, the 0.420 kg ball has a velocity of 0.220 m/s at an angle of 36.9 ∘ above the x axis in the first quadrant. Both balls move on a frictionless, horizontal surface.
Required:
a. What is the magnitude of the velocity of the 0.605kg ball after the collision?
b. What is the direction of the velocity of the 0.605kg ball after the collision?
c. What is the change in the total kinetic energy of the two balls as a result of the collision?
Answers
Answer:
a) \((v_1)=0.3989m/s\)
b) \(\theta_1=80.5 \textdegree\)
c) \(K.E=0.036J\)
Explanation:
From the question we are told that:
Initial speed of 1st ball \(u_{1}=0 m/s\)
Mass of 1st ball \(m_1=0.585kg\)
Mass of 2nd ball \(m_2=0.420kg\)
Initial speed of 2nd ball \(u_{2}=0.270 m/s\)
Final speed of 2nd ball \(v_{2}=0.220 m/s\)
Angle of collision \(\angle=36.9 \textdegree\)
a)
Generally the equation for law of conservation is mathematically given by
\(m_1u_1+m_2u_2=m_1v_1^2+m_2v_2^2\)
The final velocity \(v_1\) is given as
\(0+(0.420)(0.270)=(0.585)(v_1)^2+(0.420)(0.220)^2\)
\((v_1)^2=\frac{(0.420)(0.270)-(0.420)(0.220)^2}{0.585}\)
\((v_1)^2=0.1591\)
\((v_1)=0.3989m/s\)
b)
Generally the equation for law of conservation is mathematically given by
\(m_1u_1+m_2u_2=m_1v_1cos\theta_1+m_2\theta_2\)
\(0+(0.420)(0.270)=(0.585)(1.511)cos\theta_1+(0.420)(0.220)cos36 \textdegree\)
\(cos\theta_1= \frac{(0.420)(0.270)-(0.420)(0.220)cos36 \textdegree}{(0.585)(0.3989)}\)
\(cos\theta_1=0.1656\)
\(\theta_1=80.5 \textdegree\)
c)
Generally the equation for kinetic energy is mathematically given by
\(K.E=\frac{1}{2} mv^2\)
1st Ball
\(K.E=\frac{1}{2} (0.585)(0.3989)^2\)
\(K.E=0.0465J\)
2nd ball
\(K.E=\frac{1}{2} (0.420)(0.220)^2\)
\(K.E=0.101J\)
Therefore the change in the total kinetic energy of the two balls as a result of the collision is
\(0.101-0.0465\)
\(K.E=0.036J\)
Fill in the magnitude of net force for each case. Including the solution plss
Answers
Net forces in all above cases will be
A) F net = 0
B) F net = 1 N
C) F net = 5 N
D) F net = 5N
E) F net = 5 N
F) F net = 5 N
G) F net = 9.9 N
H) F net = 9.9 N
A) net force = upward force - downward force
= 4 - 4 = 0
B) net force = rightward force - leftward force = 4 - 3 = 1 N
C) net force
using Pythagoras theorem
F net = \(\sqrt{4^{2} + 3^{2} }\) = \(\sqrt{25}\) = 5 N
D) F net = \(\sqrt{-4^{2} + (-3)^{2} }\) = 5 N
E) balancing horizontal forces
rightward force - leftward force = 5 - 2 = 3 N
using Pythagoras theorem
F net = \(\sqrt{4^{2} + 3^{2} }\) = 5 N
F) balancing vertical forces
-5 + 2 = -3 N
using Pythagoras theorem
\(\sqrt{(-4)^{2} +(-3) ^{2} }\) = 5 N
G) using Pythagoras theorem
F net = \(\sqrt{7^{2} + 7^{2} }\) = 9.9 N
H ) balancing horizontal forces
10 - 3 = 7 N
\(\sqrt{7^{2} + 7^{2} }\) = 9.9 N
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HELP!!! You have two substances, both of which have the same boiling point (or attraction between their molecules).
The first substance is made from molecules that are small (just a few atoms bonded together), and the second substance is made from mol that are larger (many atoms bonded together).
How can it be possible for two such different molecules to yield substances with the same boiling point? Describe the kinds of intermolecu attractions that must be involved and any other properties of the molecules that could cause this result.
Answers
The boiling point of a substance depends on the strength of the intermolecular forces between its molecules. In the case of the two substances you mentioned, even though they have different molecular sizes, they can still have the same boiling point if they have similar intermolecular attractions.
What is the boiling point about?For example, the smaller molecule may have a higher polarity due to the presence of polar bonds, which can result in dipole-dipole interactions between molecules. The larger molecule may have a similar dipole moment even though it has more atoms, or it may have a polar functional group that contributes to its intermolecular interactions.
In addition to dipole-dipole interactions, the molecules may also have London dispersion forces, which are present in all molecules due to the random fluctuations in electron density. These forces are proportional to the size of the molecule, so the larger molecule may have a stronger dispersion force even if it is less polar than the smaller molecule.
Therefore,, it is possible for two different molecules to have the same boiling point if they have similar intermolecular attractions, such as dipole-dipole interactions and London dispersion forces. The size of the molecule may also play a role in determining the strength of these forces, but it is not the only factor.
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Consider the f(x) = Acos(x) function shown in the figure in blue color. What is the value of amplitude A for this function?
As a reference the g(x) = cos(x) function is shown in red color, and green tick marks are drawn at integer multiples of π.
Answers
The amplitude of the red colored wave is 1 unit and the amplitude of the red colored wave is 2.1 unit.
What is amplitude of a wave?
The amplitude of a wave is the maximum displacement of the wave. It can also be described at the maximum upward displacement of a wave curve.
Amplitude of the red colored waveFrom the graph, the amplitude of the red colored wave is 1 unit.
Amplitude of the blue colored waveFrom the graph, the amplitude of the red colored wave is 2.1 unit.
Thus, the amplitude of the red colored wave is 1 unit and the amplitude of the red colored wave is 2.1 unit.
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formula for working maximum velocity?
Answers
Answer:
Now, we know that velocity is maximum when y=0, i.e., displacement is zero and acceleration is zero, which means the system is in equilibrium. Therefore, at a point in simple harmonic motion, the maximum velocity can be calculated using the formula v=Aω.
Explanation:
Which are consequences of smoking while pregnant
Answers
Answer:
Explanation:
Tobacco. Smoking during pregnancy increases the risk of health problems for developing babies, including preterm birth, low birth weight, and birth defects of the mouth and lip. Smoking during and after pregnancy also increases the risk of sudden infant death syndrome (SIDS).
Answer:
B I - T H deficits, S l D S, S T I L L . B I - T H
Explanation:
2021 edg .
The Earth is a sphere with a diameter of about 12,800 kilometers. Scientists believe that the Earth first formed
billion years ago and was larger then than it is now.
The Earth was so hot that all the rock was molten, i.e. in the
state.
We think that about 4.4 billion years ago the Earth had cooled down enough to let a
crust form on the surface.
Answers
Answer:
Explanation:
Earth is our home planet. Scientists believe Earth and its moon formed around the same time as the rest of the solar system. They think that was about 4.5 billion years ago. Earth is the fifth-largest planet in the solar system. Its diameter is about 8,000 miles. And Earth is the third-closest planet to the sun. Its average distance from the sun is about 93 million miles. Only Mercury and Venus are closer.
What Are Earth's Different Parts?
Earth consists of land, air, water and life. The land contains mountains, valleys and flat areas. The air is made up of different gases, mainly nitrogen and oxygen. The water includes oceans, lakes, rivers, streams, rain, snow and ice. Life consists of people, animals and plants. There are millions of species, or kinds of life, on Earth. Their sizes range from very tiny to very large.
Below Earth's surface are layers of rock and metal. Temperatures increase with depth, all the way to about 12,000 degrees Fahrenheit at Earth's inner core.
Earth's parts once were seen as largely separate from each other. But now they are viewed together as the "Earth system." Each part connects to and affects each of the other parts. For example:
Clouds in the air drop rain and snow on land.
Water gives life to plants and animals.
Volcanoes on land send gas and dust into the air.
People breathe air and drink water.
Earth system science is the study of interactions between and among Earth's different parts.
A mineral oil has a density of 0.875 g/cm3. Suppose you spread 0.60 g of this oil over the surface of water in a large dish with an inner diameter of 21.6 cm. How thick is the oil layer
Answers
With a density of 0.875 g/cm³, a sample of 0.60 g of this oil would have a volume V such that
0.875 g/cm³ = (0.60 g)/V ==> V ≈ 0.686 cm³
If the oil is spread out uniformly over the water's surface, then it forms a cylinder whose diameter is equal to that of the dish, 21.6 cm. Then the thickness d of the oil cylinder is such that
V = π ((21.6 cm)/2)² d ==> d ≈ 0.0202 cm
Which type of force is a noncontact force?
O A. Buoyancy
O B. Any normal force
O C. Air resistance
O D. Any fundamental force
Answers
Answer:D>D>D>D>D>D>D>D>>D>D>D>D>D>D>D>D>D>
Explanation:
Answer:
O D. Any fundamental force
Explanation:
got it right on the test
An ice skater with a mass of 80 kg pushes off against a second skater with a mass of 32 kg. Both skaters are initially at rest. (a) What is the total momentum of the system after they push off? (b) If the larger skater moves off with a speed of 3 m/s, what is the corresponding speed of the smaller skater
Answers
A. The total momentum of the system after they push off is zero.
B. m1v1=m2v2
v2=m1v1/m2
v2=80*3.0/32
v2=7.5 m/s
in fact
m1v1=80*3= 240 kgm/s
m2v2= 32*7.5= 240 kgm/s.
A penny board is a type of skateboard characterized by a short, narrow deck made of plastic. If you're on the short side, consider choosing a smaller deck. Smaller decks are easier to operate and control, lighter, and more portable. If you are taller, you should choose a larger deck.
The larger deck gives more stability and power when skating. A big part of being a skater girl is looking like that which means wearing skate-branded shoes and clothes. Other skaters tend to wear these clothes cut to allow the skater's movement. Good skatesHer brands include Vans DC Nike especially basketball lines and Etnies I have.
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Check Concepts
4.
35. Which of the following do you calculate
when
you
divide the total distance trav-
eled by the total travel time?
A) average speed
B) constant speed
C) variable speed
D) instantaneous speed
Answers
Answer:
I think its A.........
Newton’s second law of motion says when a is applied to a it causes it to.
Answers
Answer:
When force is applied to an object it causes to to accelerate.
Explanation:
ONLY answer if you know FOR SURE. if your not 100% on it, DONT FREAKING ANSWER. ONLY IF YOU KNOW FOR SURE!
Which type of graph is best to use with data that shows a comparison of categories?
A. Pie Chart (Circle Graph)
B. Line Graph
C. Bar Graph
D. Frequency Table
Answers
Answer: the answer is (C)
Explanation: Bar graphs show comparisons using number comparisons
If 84 J of work are exerted to pull a wagon, how much force does it take to pull the wagon 7.0 m? Round your answer to the nearest whole number.
Answers
Answer: It takes 12 N of force to pull the wagon.
Explanation:
Name:.
Date:
Homework: Writing an Argument About
Australia's Skin Cancer Rate
G
4
You now have enough evidence to explain why Australia's skin cancer rate is so high. Review your
argument from Chapter 2 and think about how you will convince the AHA that both Claim 2 and
Claim 3 are accurate. You will use your completed Reasoning Tool from Activity 3 to revise and add to
your argument.
Question: Why is the skin cancer rate in Australia so high?
Answers
Can anyone help with the attached question
Answers
The wave front, also known as the wavefront, is an imaginary surface that represents equivalent points of a wave that vibrate in sync. The correct option is D ; 2.0 .
What is a wavefront in physics?A wave front is described as a surface where the wave's phase remains constant. At any one time, all particles of the medium are moving in the same direction along a certain wave front. Two kinds of wave fronts are very essential. They are plane and spherical wave fronts, respectively. A wavefront is a surface on which the wave disturbance is in the same phase at all places. For example, the ripples of water created when a stone is tossed into a pond.
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if soap falls on the floor is the floor clean or is the soap dirty
Answers
Answer:
both
the cleen soap is falling on a nasty floof cleans the floor and gets dirty
Explanation:
Answer:
UH UH
Explanation:
Asset questions below fill in the blanks
Answers
Acceleration is defined as the change in velocity per unit time. Its unit is m/s².
Distance is the amount of space, or the actual length of the path travelled.
Displacement is the difference between the initial and final positions of the object.
Speed is the rate at which an object covers a certain distance.
Velocity is defined as the speed with a direction.
An object is said to have a positive velocity, if it is moving in the positive direction. And an object moving in negative direction has a negative velocity.
Acceleration is the change in velocity per unit time.
For freely falling objects, gravity is the only thing acting on the object.
The acceleration due to gravity on the earth is 9.8 m/s².
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the fastest tennis service by a man is 246,2 km.hr-1 by Andy Roddick of the United States of America during a match in London in 2004. Calculate the ball's momentum if it has a mass of 58 g?
Answers
Answer:
Approximately \(3.967\; {\rm kg\cdot m\cdot s^{-1}}\).
Explanation:
Convert velocity to the standard units (meters per second):
\(\begin{aligned}v &= 246.2 \; {\rm km \cdot h^{-1}} \\ &= 246.2 \; {\rm km \cdot h^{-1}}\times \frac{1\; {\rm h}}{3600\; {\rm s}} \times \frac{1000\; {\rm m}}{1\; {\rm km}} \\ &\approx 68.389\; {\rm m\cdot s^{-1}}\end{aligned}\).
Convert mass to standard units (kilograms):
\(\begin{aligned} m &= 58\; {\rm g} \\ &= 58\; {\rm g} \times\frac{1\; {\rm kg}}{1000\; {\rm g}}\\ &= 0.058\; {\rm kg}\end{aligned}\).
When an object of mass \(m\) travels at a velocity of \(v\), momentum of that object would be \(p = m\, v\). In standard units, the momentum of this tennis ball would be:
\(\begin{aligned}p &= m\, v \\ &\approx (0.058\; {\rm kg})\, (68.389\; {\rm m\cdot s^{-1}}) \\ &\approx 3.967\; {\rm kg \cdot m\cdot s^{-1}}\end{aligned}\).
Please help if you do I will give you 50 points and brainliest. I'll give you 50 points by posting another question just to make it clear.
Answers
Answer:
Name and Title: Lyric Howe, Mrs. Stefani, 9/20/17, Thermal Energy and Chemical Change Engineering Lab
Define the Problem:To understand thermal energy and chemical changes better by building my own train.
Criteria and Limitations—In this section, please list at least three criteria that must be met by your train design. Also include any limitations that could prevent it from getting its cargo to the station.
Criteria Limitations One steam engine Two separate hills One cargo box Missing tracks Stack items across or atop each other Weight
Design Ideas—Pros and Cons:In this section, describe three design ideas you have for your train. List at least one pro (a positive) and one con (a negative) for each design option
Description of Train Design One Wheels first with two springs underneath each wheel, the panda cargo in the middle with the steam engine in the front, and two sets of helium balloons.