When you are standing in a subway train and the train suddenly stops but your body continues to move forward. Which one of Newton's laws is this?
1st law
2nd law
3rd law
4th law
Answers
Answer:
A. 1st law.
Explanation:
Newton's first law of motion states that, an object or body will continue to be at rest or experience a uniform motion in a straight line at constant speed provided there's no action of an external force. Thus, unless compelled to change its state by an external force, a body will continue to be at rest or experience a uniform motion in a straight line.
The Newton's first law of motion is also known as the law of inertia; which is the tendency of a body to be at rest unless acted upon by an external force.
In this scenario, you are standing in a subway train and the train suddenly stops but your body continues to move forward. This is in accordance with Newton's first law of motion.
Hence, the sudden stoppage of the train generates a force which acts on the body thereby causing the passenger to tip or move forward.
Related Questions
6. If humans could unleash genetic modifications upon mosquitos that would eradicate the
species entirely, should they do it? Why or why not?
Answers
Answer:
Hope it helped brainiest plz and thank you!!!!!!1
Explanation:
3. If humans could unleash genetic modifications upon mosquitos that would eradicate the species entirely, should they do it?
No, they should not eradicate the mosquitos because they are part of the food chain for some animals.
based on what you know about the location in relation to the sun why is this called the goldilock zone in other galaxies
Answers
Answer: It's an area that's an optimal distance from the sun for potentially supporting life
You own a geotechnical engineering firm in central California and your company has been hired to conduct a slope stability analysis. Consider a 10.0 m-thick mass of regolith (note that this is already measured perpendicular to the slope – so pay attention where you might change the cosine term) sitting on top of a bedrock surface with a slope of 14 degrees. A home is located at the top of this slope (and set back from the edge only 20 m). Upon an initial visit, you determine that the regolith is unsaturated. You also estimate the following additional parameters for this site:
regolith cohesion = 1100 N/m2
regolith angle of internal friction = 15 degrees
density of regolith = 2200 kg/m3 (density of water = 1000 kg/m3 )
a. What is the value for the Factor of Safety? Show your work. Would you consider the slope currently stable? Explain your answer. 4 pts
b. How does the factor of safety change if the water depth increases by 2 m? Does the slope become more or less stable, and by how much? How does this compare to the example above (Part a.)? 3 pts
c. How does the factor of safety change if the angle of internal friction increases by a factor of 2 (this would be the equivalent of changing the material from loose sand to semi-consolidated sediment)? Does the slope become more stable or less stable? 3 pts
d. How does the factor of safety change if the slope is steeper by a factor of 2? Does the material become more or less likely to fail? 3 pts
e. What advice would you give to the homeowners regarding the safety of their home? What remediation can you suggest if any is needed? 3 pts
Answers
The factor of safety for the slope stability analysis needs to be determined for a regolith slope in central California. The parameters provided include regolith cohesion, angle of internal friction, and regolith density. The analysis involves evaluating the stability of the slope under different conditions, such as changes in water depth, angle of internal friction, and slope steepness. Recommendations for the homeowners regarding the safety of their homes and potential remediation measures will also be provided.
To calculate the factor of safety, we need to consider the forces acting on the slope. The driving force is the weight of the regolith, which can be calculated by multiplying the density of the regolith by the volume of the slope. The resisting force is the shear strength of the regolith, which is determined by the cohesion and angle of internal friction. The factor of safety is the ratio of the resisting force to the driving force.
a. To determine the factor of safety, we can use the given parameters and calculate the driving force and resisting force. By dividing the resisting force by the driving force, we can obtain the factor of safety. If the factor of safety is greater than 1, it indicates that the slope is stable. If it is less than 1, the slope is considered potentially unstable.
b. If the water depth increases by 2 m, it adds additional weight to the slope, increasing the driving force. This decrease in the factor of safety suggests a less stable slope compared to the initial scenario.
c. If the angle of internal friction increases by a factor of 2, it enhances the shear strength of the regolith. This increase in the factor of safety indicates a more stable slope.
d. If the slope becomes steeper by a factor of 2, it increases the driving force. This decrease in the factor of safety suggests a less stable slope.
e. Based on the analysis, it is important to advise the homeowners that the slope is currently unstable, considering the factor of safety is less than 1. Remediation measures may include slope stabilization techniques such as installing retaining walls, soil reinforcement, or drainage systems to manage water infiltration and reduce driving forces. It is recommended to consult with a geotechnical engineer to develop a comprehensive slope stability plan for the safety of the home.
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A candle 3.0 cm high is placed 30 cm from a converging mirror with a focal length of 20 cm.
Answers
I hate to leave you without an answer, but there isn't enough information to be able to answer your problem.
will the particle move to the right (in the positive x -direction) or to the left (in the negative x -direction), and why?
Answers
Yes, the particle moves in the positive x-direction (to the right) or the negative x-direction (to the left) due to the forces of attraction and repulsion.
When the particle's velocity is positive, it is travelling to the right. When the velocity is negative, it also moves to the left. A body with a higher mass may have a lower moment of inertia than a body with a lower mass. This relies on the mass distribution and axis with respect to which we are computing the moment of inertia. In real-world situations, we frequently avoid dealing with particles.
The time it takes for a constant force to bring a particle to rest, on the other hand, is represented by its momentum.
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SI Prefix Meaning
[unit]
deci-
centi-
nano-
Please no links Just tell me the SI Prefix meaning
Answers
- centi: one-hundredth.
- nano: one-billionth.
hope this helps :)
Which of the following best defines energy?
the ability to do work
the resistance to motion
how fast an object moves
amount of force in a given time
Answers
Answer:
The Ability to do work
Explanation:
energy is needed to do work because without energy no work can be done due to the fact that there is no energy
A hollow sphere is filled with water. It is hung by a long thread. As the water flows out of a hole at its bottom, the period of oscillation will.
Answers
Answer:
The period wlll decrease - it will swing faster
The period of a simple pendulum is just
P = 2 π √(L / g)
However, with a compound pendulum one must also consider the moment of inertia about the center of mass at distance L.
As water drains from the sphere its moment of inertia about its point of suspension will decrease and the pendulum will swing faster
Technically P = 2 π √I0 / M g L)
where I0 = M L^2 + Icm Icm is moment of inertia about the center of mass - if Icm = zero then P = 2 π √(L / g) the simple pendulum
two conducting spheres are seperated by a distance d. what is the magntiude of the new attractive force?
Answers
If the distance between the spheres is reduced, the magnitude of the attractive force between them will increase according to the inverse square law.
The magnitude of the new attractive force between two conducting spheres that are separated by a distance d can be determined by using Coulomb's law. Coulomb's law states that the force between two charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. However, for conducting spheres, the charges are distributed uniformly on their surfaces.
Assuming that the spheres have charges of q₁ and q₂, the magnitude of the attractive force between them can be given by the following equation:
F = (1/4πε) (q₁ q₂ / d²)
Where ε is the permittivity of the medium between the spheres.
Therefore, if the distance between the spheres is reduced, the magnitude of the attractive force between them will increase according to the inverse square law. On the other hand, if the distance between the spheres is increased, the magnitude of the attractive force will decrease.
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Jerrold just broke up with his girlfriend and is describing his current feelings about the breakup to his friend. According to Freud, from which part of Jerrold's mind did he pull the information to share? (2 points) Group of answer choices Unconscious Preconscious Conscious awareness Conscience
Answers
Answer:
Conscience
Explanation:
Conscience refers to a person's moral sense to differentiate between right and wrong to judge one's behaviour.
Jerrold just broke up with his girlfriend and is describing his current feelings about the breakup to his friend.
So, he pull the information from the conscience of Jerrold's mind.
in an oscillator consisting of a spring and a block, the amount of kinetic energy reaches maximum when:
Answers
In an oscillator consisting of a spring and a block, the amount of kinetic energy reaches maximum when: A. The block passes over the equilibrium point.
What is kinetic energy?In Science, kinetic energy can be defined as a type of energy that's possessed by a physical object or body, especially due to its motion or a change in velocity (acceleration).
This ultimately implies that, a physical object or body would gain more of kinetic energy as it falls back toward the Earth because it is in motion.
In an experiment that is based on an oscillator using both a spring and a block, the amount of kinetic energy that is possessed by the block would reach maximum when it passes over the equilibrium point.
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Complete Question:
In an oscillator consisting of a spring and a block, the amount of kinetic energy reaches maximum when:
The block passes over the equilibrium point.
The block is at maximum positive displacement from the equilibrium point.
The spring's extension is half of the amplitude of oscillation.
The spring is at maximum compression.
None of these.
Science project!!! For this assignment, you will ask questions about the factors that have caused a rise in global
temperatures over the past century. Then, you will conduct research to answer your questions. You will
also graph provided information, analyze the graphs, and make conclusions based on the graphs. Finally,
you will write a paper describing the conclusions of your research and graphs
Answers
My project is in the file attached, lots of thanks to Maxineishere for helping me with the essay. You may need adobe reader for this as the files are PDF files, I hope you are satisfied! :)
DATE ANSWERED: 5/8/2021
Compare and contrast electric potential energy and electric potential difference? Explain.
Answers
Answer:
Electric Potential Energy:
The energy that is needed to move a charge against an electric firld is called Electric Potential Energy
Electric Potential Difference:
The amount of work done in carrying a unit charge from one point to an other in an electric field is called Electric Potential Difference.
Relation:
Relation between Electric potential and electrical potential energy is given by
\(\delta V=\frac{PE}{q}\)
Here PE represents Electric potential energy
and \(\delta V\) is Electric potential difference
it means electric potential difference is the difference in electric potential energy divided by the charge.
A baseball player uses a bat to hit a 0.145-kilogram stationary baseball with a force of 18,436 newtons. What is the force, in newtons, on the player's bat?
Answers
Answer:
18,436 newtons
Explanation:
hope it helps you
A two-dimensional, conservative force is zero on the x– and y-axes, and satisfies the condition (dFx/dy) = (dFy/dx) = (4N/m3
)xy. What is the magnitude of the force at the point x = y = 1m?
Answers
The magnitude of the force at (1,1) is F = sqrt\(((2N/m)^2 + (2N/m)^2)\) = 2.828N/m. To find the magnitude of the force at the point x=y=1m, we can use the formula for the magnitude of a 2D force: F = sqrt(\(Fx^2 + Fy^2\)).
Since the force is conservative, we can find its potential energy function by integrating: U(x,y) = ∫Fx dx + ∫Fy dy.
From the given condition, we know that (dFx/dy) = (dFy/dx) = (4N/m3)xy.
Integrating this gives us Fx = 2N/m *\(x^2 * y^2\) and Fy = 2N/m * \(x^2 * y^2.\) Substituting x=y=1m, we get Fx = Fy = 2N/m.
This means that the force is pulling with a strength of 2.828N/m at a 45-degree angle from both the x and y axes.
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A 20-cm-long stick of m = 0. 600 kg is lifted by a rope tied 5. 0 cm from the upper end. The other end touches a smooth floor. The stick makes an angle θ with the floor. Find the magnitude of the normal reaction from the floor on the stick
Answers
When a 20-cm-long stick of m = 0. 600 kg is lifted by a rope tied the magnitude of the normal reaction from the floor on the stick is 0.9055 N.
a force that applies perpendicularly to two surfaces that are in touch. It represents the force that is squeezing the two surfaces together. The value of limiting friction increases with the magnitude of the typical response force. The normal response force is equal in size to the weight but acts in the opposite direction if weight is the sole vertical force acting on an item that is laying or moving on a horizontal surface. Therefore, raising the weight causes more friction.
Substitute the required values to find the value of R.
R = 3/13(0.400)(9.81m/s²)
R = 0.9055 N.
Therefore, the normal reaction from the floor on the stick is 0.9055 N.
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the 10-kg block is pressed against the spring so as to compress it 5 m when it is at a. if the block is released from rest at a and the plane is smooth, determine:
Answers
The value of distance 'd' is 53.2 meters, measured from the wall, to where the block strikes the ground.
weight = 10 kg
g = 9.8m/s²
x = 5
Using the principle of work and energy,
T₁ +∑U₁-₂ = T₂
0 + 1/2kx² -wh = 1/2 w/g V²
Substituting, we have
0 + 1/2 * 100 * 5² - (10 * 3) = 1/2 * (10/9.8)V²
170 = 0.15528V²
V² = 170/0.15528
V² = 1094.796
V = √1094.796
V = 48.89/s
But tan ∅ = 3/4
∅ = tan⁻¹3/4
= 36.87°
From uniform acceleration,
S = S₀ + ut + 1/2gt²
It can be written as
S = S₀ + Vsin∅*t + 1/2gt²
Substituting, we have
0 = 3 + 33.09 * sin 36.87 * t -(1/2 * 9.8 *t²)
19.85t - 16.1t² + 3 = 0
16.1t² - 19.85t - 3 = 0
Solving it quadratically, we obtain t = 1.36s
The distance measure from the wall is given by the formula
d = VCos∅*t
Substituting, we have
d = 48.9 * cos 36. 87 * 1.36
d = 53.2 m
So the value of distance is 53.2 meter.
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Complete question:
The 10-kg block is pressed against the spring so as to compress it 5 m when it is at a point A. If the plane is smooth, determine the distance d, measured from the wall, to where the block strikes the ground. Neglect the size of the block.
how much force is required to lift a 49-newton object with an acceleration of 9.8 m/s2?
Answers
480.0 Newtons force is required to lift a 49-newton object with an acceleration of 9.8 m/s2/. The explaination is mentioned below:
To calculate the amount of force required to lift a 49-newton object with an acceleration of 9.8 m/s2, we need to use the formula F = ma, where F is the force required, m is the mass of the object (in this case, 49 newtons), and a is the acceleration (in this case, 9.8 m/s2).
Plugging in the values, we get:
F = 49 x 9.8
F = 480.2 Newtons
Therefore, the amount of force required to lift a 49-newton object with an acceleration of 9.8 m/s2 is 480.2 Newtons.
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9. Graph the following data on the graph, then use the graph to determine the half life of this
isotope.
Answers
The half life is the time taken for half the number of radioactive atoms originally present to remain. This is the time that corresponds to exactly half of the original number of radioactive isotopes remaining in the system.
What is half life?The half life is the time taken for half the number of radioactive atoms originally present to remain. We can plot the number of atoms against the time taken in a graph.
We can obtain the half life of the radioactive isotope from the graph by noting the time that corresponds to exactly half of the original number of radioactive isotopes remaining in the system.
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AIBr+ __K__KBr + __AI
Answers
Answer:
1AlBr3+ 3K ---> 3KBr + 1Al
Explanation:
What is a mechanical advantage?
Answers
Answer:
B
Explanation:
A Mechanical Advantage is when you use a piece of machinery to help you do work, and it is an easy advantage.
The speed of sound in a particular gas is 675 m/s. A sound wave propagating in this material has a wavelength offifteen meters. What is the frequency of this sound?knowns and unknownsolveright answer
Answers
Given, Speed of the sound, v=675 m/s
The wavelength of the wave, λ=15 m
Relation between speed, wavelength, and frequency of a wave is given by
\(v=f\lambda\)Where f is the frequency of the sound.
On substituting the known values,
\(675=f\times15\)Which gives us,
\(f=\frac{675}{15}=45\text{ Hz}\)Therefore the frequency of the sound in the given medium is 45 Hz.
A small toddler is playing in his yard. Over the course of 29.01 s, he walks 2.099 m S before turning N and walking 1.429 m. What is his average velocity?
Answers
Answer:
0.0231 m/s
Explanation:
Given the question :
A small toddler is playing in his yard. Over the course of 29.01 s, he walks 2.099 m S before turning N and walking 1.429 m. What is his average velocity?
Distance walked south = 2.099 metre
Time taken = 29.01s
Distance walked north = 1.429 metre
Average Velocity = Displacement / time
The Displacement is hence,
(2.099 m - 1.429m) = 0.67m
Average Velocity = 0.67m / 29.01s
Average Velocity = 0.02309 m/s
Average Velocity = 0.0231 m/s
how mny hours does it takes you to travel by foot from australia to fiji
Answers
Answer:
About 22 hours in flight time.
Explanation:
It wouldn't give me the walking time.
Hope I helped ya.
< Sarah >
Answer:
Hmm idk u was tryna take the trip or sum
Explanation:
uppose that a new mips instruction, called bcp, was designed to copy a block of words from one address to another. assume that this instruction requires that this instruction requires that the starting address of the source block be in register $t1 and that the destination address be in $t2. the instruction also requires that the number of words to copy in $t3 (which is >0). furthermore, assume that the values of these registers as well as register $t4 can be destroyed in executing this instruction (so that the registers can be used as temporaries to execute the instruction).
Answers
The MIPS instruction "bcp" is designed to copy a block of words from one address to another. It requires the starting address of the source block to be stored in register $t1 and the destination address to be stored in register $t2. The number of words to be copied should be stored in register $t3, and this value should be greater than 0. During the execution of this instruction, the values in registers $t1, $t2, $t3, and $t4 can be destroyed as they may be used as temporaries.
In summary, the "bcp" instruction in MIPS allows for the efficient copying of a block of words between memory locations using the specified registers, with the understanding that the values in those registers may be modified during execution.
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The voltage across a 10 ohm resistor carrying 5 Amps of current is a. 10 Volts b. 5 Volts c. 1 Volt d. 50 Volts
Answers
The voltage of the resistor of resistance 10 ohms is 50 V. The correct option is d. 50 Volts.
What is voltage?Voltage describes the “pressure” that pushes electricity.
To calculate the voltage of the resistor, we use the formula below.
Formula:
V = IR............... Equation 1Where:
V = VoltageI = CurrentR = ResistanceFrom the question,
Given:
I = 5 AR = 10 ohmSubstitute these values into equation 1
V = 5×10V = 50 VHence, the voltage of the resistor is 50 V. Correct option d. 50 volts.
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Electric current passing though a wire produces
Answers
Answer:
electrical energy so that there would be a flow of light
Explain Why a description of a position depends on a reference on point.
Answers
Answer:
A description of position depends on a reference point because if the reference point changes than the distance and direction can change. Before the weight was moving two forces were acting on it
Explanation:
i hope this helps:)
<3
Plants make food through photosynthesis, and photosynthesis takes place mostly in plant leaves, but when plants lose their leaves in the winter, they do not die. This is evidence that A. someone gives the plants food every day. B. plants can use heat in the ground to make food. C. plants store food for later use. D. photosynthesis also takes place in plant roots.
Answers
Answer:
The answer is not B or D because they need light co2 and water to make their food so B and D are out. and unless someone is walking during winter to feed it. It will not be A so the answer is C.
Explanation:
Plants can use heat in the ground to make food in winters. Plants make food through photosynthesis, and photosynthesis takes place mostly in plant leaves, but when plants lose their leaves in the winter, they do not die. Thus, the correct option is B.
What is Photosynthesis?Photosynthesis is the process through which plants use the sunlight, which is trapped in the chlorophyll pigment present in the chloroplast of cells to convert water, and carbon dioxide to produce oxygen gas and energy in the form of sugar (carbohydrate).
Photosynthesis is the process in which energy transformation takes place. In this process, light energy from the sun is converted into chemical energy that is in the form of carbohydrate in the leaves of the plant.
Therefore, the correct option is B.
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Draw a complete circuit. Label all the parts. Use a crayon to trace the path electricity takes to light the bulb.
Answers
Answer:
Here you go, look at the pic. It's labeled
