It takes the cyclist 4 seconds to slow down.
Considering the acceleration is constant, we know that,
v² - u² = 2 a s
a = Δv / t
Δv = v - u
where,
v = Final velocity
u = Initial velocity
s = Displacement
Δv = Rate of change of velocity
Given that,
u = 15 m /s
v = 3 m / s
s = 36 m
3² - 15² = 2 * a * 36
-216 / 72 = a
a = - 3 m / s²
a = ( v - u ) / t
- 3 = ( 3 - 15 ) / t
t = 4 sec
Rate of change of velocity is the velocity difference between initial and final velocity. It is denoted as Δv.
Therefore, it takes the cyclist 4 seconds to slow down.
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13. If Joe begins his hike at +125 meter altitude, and finishes his hike at +1532
meters, what is his velocity in meters/seconds if it takes 20 minutes?
velocity in meters/seconds if it takes 20 minutes is equal to 1.17m/s
the velocity of the object can be obtained by the formula v = distance travelled/ time taken
Total distance travelled = 1532 -125 = 1407 m and 20 min in sec = 20 X 60 = 1200 so velocity in m/s is 1407/1200 1.17m/s
swiftness; speed of movement or action; a fast wind's velocity. Mechanics. the speed at which a body's position changes over time in a given direction. the velocity of action or reaction; the rate at which something occurs
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In a complete sentence, explain what determines temperature
Answer:
temperature means the degree of hotness or coldness of the body
Explanation:
when the heatness is transferred by our body
we feel cold
for example if we touch ice
we feel cold
when the heatness is transferred to our body we feel hot
for example when we touch fire we feel hot
The divorce rate in the United States quadrupled over the twentieth century, from less than 1 per 1,000 people in 1900 to 4 per 1,000 in 2000. Although declining in recent decades, the rate today is still 3 times higher than it was in 1900. Explain this dramatic change in social arrangements over the 20th century in the view of each of the three sociological perspectives: Functionalist Theory, Conflict Theory, and Symbolic Interactionism. Include in your answers the primary drivers of social change emphasized by each perspective. In the coming decades, do you think the divorce rate will continue to fall, flatten out, or rise again, and why? Use one or two paragraphs for your answer.
PLEASE ANSWER!!! I'm very overwhelmed with schoolwork right now.
Divorce is viewed negatively by functionalists from a macro perspective. A functionalist would blame divorce on the breakdown of social structures rather than looking at the persons involved. Some of the structures that have evolved over the years leading to the rise in divorce rates according to Functionalists is the increasing erosion of the traditional role of men and women in the society.
What does the conflict theory say about divorce?According to conflict theorists, divorce is the consequence of a disagreement over resources in a marriage.
Conflict theory holds that the disintegration of marriage occurs from rivalry for resources and authority within the marriage, just as it does in a society when groups compete for limited resources.
What is the relationship between symbolic interactionism and divorce?Choices, according to symbolic interactionists, are based on learnt behavior.
Symbolic interactionists believe divorce is the consequence of two persons affected by their friends and family members.
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How will an object at rest be affected if multiple forces working on it are opposed but unbalanced? (1 point)
The unbalanced forces will cause the object to produce a humming sound.
O Motion will be either created, stopped or changed.
The mass of the object will decrease.
The acceleration of the object will increase.
b) The motion will be either created, stopped, or changed.
An unbalanced force is said to act on an object if the sum of all forces acting on it is non-zero. This means that some force is acting on the object, so the object experiences an acceleration equal to F = ma.
Force Imbalance:
Generates motion of a stationary object (acceleration is +ve as the object changes its velocity from 0 to some value while it is stationary).Stop the moving object (because the object changes velocity from some value to zero and stops, i.e. -ve acceleration).Change the speed of a moving object (there is an acceleration due to the change in speed).Changes the direction of movement of the object (there is an acceleration due to the direction change).Thus, there will be some change in motion in the object if multiple forces applied are unbalanced.
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Answer:b…………………………….
Explanation:
Which of the following happens when unbalanced forces act on an object
Bill's motorcycle can accelerate at 7.05m/s² at a certain RPM and gear. How far, starting from rest,
will Bill travel in the first 2.50s?
The distance travelled by Bill in the first 2.5 s is 22.03 m
Data obtained from the questionThe following data were obtained from the question:
Initial velocity (u) = 0 m/sAcceleration (a) = 7.05 m/s² Time (t) = 2.5 sDistance (s) =?How to determine the distance travelledThe distance travelled can be obtained as follow:
s = ut + ½at²
s = (0 × 2.5) + (½ × 7.05 × 2.5²)
s = 0 + (½ × 7.05 × 6.25)
s = 0 + 22.03
s = 22.03 m
Thus, the distance travelled in 2.5 s by Bill is 22.03 m
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If the total net force on a system is zero, assuming the mass remains constant, which must be true? (1 point)
O The acceleration is zero.
O The velocity is increasing.
O The velocity is decreasing.
O The acceleration is increasing.
Answer:
O The acceleration is zero.
Explanation: because it not decreasing nor increasing just staying the same speed
A force directed 51.8° below the positive x-axis has an x component of 4.93 lb. Find its y component.
y= 6.26 lb.
Explanation:1. Draw the vector of the force to better visualize and understand the problem.Check attached image 1.
2. Find an expression for the force in the y axis.Using the trigonometric functions, we need to find a function that relates the angle, opposite side and adjacent side of the drawn triangle. The function that does this is the tangent.
Let theta (θ) be the angle given by the problem.
Let "y" be the missing y component.
Tangent (θ) = Opposite side (y) / Adjacent side (x)
[tex]Tan(tetha)=\frac{y}{x}[/tex]
3. Solve the equation for y by multiplying both sides by x.[tex]Tan(tetha)*x=y[/tex]
4. Substitute the information given by the problem and calculate y.[tex]Tan(51.8)*(4.93)=y\\ \\y=6.26[/tex]
5. Express the result.
y= 6.26 lb.
What doesn't H2O stand for
Answer:
Water
Explanation:
Select the correct answer. In which direction does a bag at rest move when a force of 20 newtons is applied from the right? A. in the direction of the applied force B. in the direction opposite of the direction of the applied force C. perpendicular to the direction of the applied force D. in a circular motion
The bag would move in the direction of the applied force.
What is the direction?
Recall that work is done when the force applied moves a distance in the direction of the force. In this case, we can see that the force was applied from the right. Do not also forget that the force applied must make the object to move in a given direction. The direction in which the acceleration is imparted must also be in the direction of the force.
The understanding of the impact of force on motion could be seen from the Newtons law. We know from the Newton’s law that an object would remain at rest or in a state of uniform motion unless it I acted upon by an external force. This external force makes the object to move in the direction of the force.
Looking at the question, we are told that a 20 newtons is applied from the right hence, the bag would move in the direction of the applied force.
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You’ve been contracted to design a dragstrip for LV Motor Speedway. To do this you need to know how far a race will travel. During a race, a drag racer accelerates at 50.0 m/s2 for 5 seconds then brakes at 60.0 m/s2 to a complete stop. Sketch position-time and velocity-time graphs for this race. What is the total distance traveled by the car from start to finish? (1146m) What is the total time from start to finish? (9.2s)
The racer which accelerates at 50.0 m/s2 for 5 seconds then brakes at 60.0 m/s2 to a complete stop has an acceleration of 2 m/s^2, travels a distance of 100m in 5 seconds.
What is acceleration ?
Acceleration is the measure of a change in velocity. Acceleration frequently, but not always, denotes a shift in speed. The direction of motion is changing, therefore an object travelling at a constant speed along a circular path is still going ahead.
Given:
Acceleration, a=?
Time, t = 5 seconds
Final velocity, v= 60.0 m/s2
Initial velocity, u= 50.0 m/s2
Therefore putting the formula,
v = u + at
=> 60 = 50 +5.a
therefore, a = 2 m/s^2
Therefore distance can be found by the formula,
x = u + 1/2 at^2
Where x is the distance.
=> x = 50 + 2 . 5^2
x = 100m
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In finding the volume of a solid, when would water displacement be especially helpful?
Answer: when the world ends
Explanation:
wild guess
A warning buoy A warning buoy is observed to rise every 4.3 s as crests of waves pass by it.
(a) What is the period of these waves?is observed to rise every 4.3 s as crests of waves pass by it.
A warning buoy is observed to rise every 4.3 s as crests of waves pass by it. The period of these waves is (T) = 4.3s
What is period?The period defines the quantity or the required time to complete one single oscillation. It has a synonym called time period. It can be measured in Seconds.
How can we calculate the period?According to the question,
A warning buoy is observed to rise every 4.3 s as crests of waves pass by it.
According to the definition of time period, time between two consecutive peaks of the oscillation called the time period.
So, According to the question the period of these waves is (T) = 4.3s
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explaining how your energy system works. Make sure to explain how your system captures energy from rescue workers’ bodies to power equipment during rescue missions. Try to use the words in the Word Bank above.
Answer:
The rescue workers can get energy to the batteries in their equipment during rescue missions by using a generator to convert the kinetic energy to potential energy. Potential energy is then stored in the battery.
Explanation:
Two pieces of cloth have the same color and texture. Name another property of cloth that you might use to distinguish between the two materials.
Answer:
3эщ4шнп8х34нп943неп43щ
укр
Explanation:
кпк9геъ09ге
An atom of iron has an atomic number of 26 and a mass number of 56. How many protons, neutrons, and electrons are contained in this atom?
How far from a 1.00 μC point charge will the potential be 200 V?
The charge will the potential be 200 V = 2.23 x 10⁸ C
Given:
r = 1.00 μC
v = 200V
K = 8.988 x 10⁹ NM²/C²
Charge, also known as electric charge, electrical charge, or electrostatic charge, is a property of a unit of matter that shows how many more or fewer electrons than protons it possesses. It is represented by the symbol q.
A body that feels a force in an electric field has a property called charge. It is more useful to speak of bundles of electrons because individual electrons are so tiny and have little impact.
The formula for find how far from a 1.00 μC point charge will the potential be 200V.
V = kq / r
q = rV/ K
Charge = (1.00 x 10⁻³m)(200)/ 8.988 x 10⁹ NM²/C²
= 2.23 x 10⁸ C
So, The charge will the potential be 200 V = 2.23 x 10⁸ C
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Two identical loudspeakers separated by distance delta x each emit sound waves of wavelength lambda and amplitude a along the x-axis
What is the minimum value of the ratio delta x/ wavelength for which the amplitude of their superposition is also a?
When energy moves through a medium (such as air, water, or any other liquid or solid matter), it creates a pattern of disruption that propagates away from the source of the sound.
Two identical loudspeakers separated by distance delta X each emit sound waves of wavelength lambda and amplitude A along the x-axis.
What is the minimum value of the ratio delta X/ wavelength for which the amplitude of their superposition is also A?
On a location along the X axis, we receive a portion of the difference in their attacks when we talk along the X axis. The attacks over the wavelength are equal to the phase difference, or delta. Lambda divided by pi. The square of the temperature tude of the first three waves plus the square of the second wave's temperature, B plus two times even a two times course delta, is what determines the amplitude following a superimposed wave. Okay. The resultant amplitude, A, equals the square root of a squared plus a squared plus two times a squared in this situation because the amplitude is tiny.
Delta is now, of course, square on both sides. And we discover that A squared equals two A squared plus cost. This widget's delta are is equivalent to -1/2. Delta will be seven Pi over six. Okay, so this value is delta, which is equal to X over lambda times two pi are the ratio assaults with lambda = 7/12 from equation one.
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The graph provided represents voltage and current data for resistor R. What is the resistance of R?
Question 15 options:
4.5 Ω
0.50 Ω
2.0 Ω
9.0 Ω
The resistance, given the data from the question is 2 Ω
Ohm's lawOhm's law states as follow:
V = IR
Where
V is the voltageI is the currentR is the resistanceWith the above formula, we can obtain the resistance. Detail below
How to determine the resistanceThe following data were obtained from the question:
Change in voltage = 9 - 3 = 6 VChange in current = 4.5 - 1.5 = 3 AResistance =?V = IR
Divide both sides by I
R = V / I
Resistance = Change in voltage / Change in current
Resistance = 6 / 3
Resistance = 2 Ω
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Find the energy-consumption rate for five electrical devices you use every day. This value-in watts-is generally listed somewhere on the device or its power adapter, if it has one
For the devices identified in Question 3, estimate t total time you use each device in a day, and use th quantity, along with the device's energy-consumpto rate, to estimate the total energy each uses in a day
The amount of energy used is known as energy consumption.
Find the energy-consumption rate for five electrical devices you use every day.
The following is the power consumption formula or energy consumption formula: E = P*(t/1000); where E is energy expressed in Joules or kilowatt-hours (kWh), P is power expressed in watts, and t is the duration of the consumption of the power or energy.
A lot of electricity is used by electrical appliances. Those that produce heat or have moving parts consume a lot more energy than those that do the same for light or sound.
A higher-wattage appliance actually uses less electricity overall than a lower-wattage one, because it is properly made and completes its task more quickly.
The following are some of the commonly used electrical devices in a daily household.
LCD TV consumes 120W.Washing machine consumes 2100W.Fridge consumes 150W.Desktop computer consumes 140W.Microwave consumes 1000W.To know more about Energy Consumption, click on the link below:
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13. Describe the particles when water is a gas. What is
their distance from one another? How quickly do they
move? What do their collisions look like?
When water is a gas following are its characteristics:
The particles are very far away from each other.They move very quickly.The collision between the molecules is perfectly elastic.Like every other substance, water also exists in three forms on the basis of its physical state:
In a solid state, water exists as ice.In a liquid state, water exists as liquid water.In a gaseous state, water exists as steam.The properties of steam are similar to the properties of any gaseous substance. The particles in the gaseous state are farthest from each other than in any other state. The velocity of molecules is maximum in a gaseous state.
As the velocity of molecules is maximum, several collisions between the molecules take place every second and these collisions are perfectly elastic.
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Which of the following could be considered possible experimental errors with the motion lab? (Options in image)
Possible experimental errors with the motion lab are making a math error, incorrect measuring, cars not let go at right time, did not follow directions.
What is error in measurement?
The difference between two measurements is called an error.
The error in measurement is a mathematical way to show the uncertainty in the measurement.
Possible error in measurementmaking a math errorincorrect measuring cars not let go at right timedid not follow directionsThus, possible experimental errors with the motion lab are making a math error, incorrect measuring, cars not let go at right time, did not follow directions.
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a stunt man drops from a building and falls 15m down onto a giant air mattress a) How much time does it take for the stunt man to hit the air mattress.
B.) What is his velocity as he slams into the mattress (# and direction)
please draw a sketch also!!
The time taken is √3 s and the velocity with he lands is 17.3 m/s.
What is the time taken?In this case, we have to use the equations of kinematics as it has to do with motion under gravity. We know that;
h = ut + 1/2gt^2
h = height
u = initial velocity
g = acceleration due to gravity
t = time taken
Given that u = 0 m/s because the object was dropped from a height.
h = 1/2gt^2
t = √2h/g
t = √2 * 15/10
t = √3 s
The velocity with which he falls is obtained from;
v = u + gt
v = gt
v = 10 m/s^2 * √3 s
v = 17.3 m/s
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A jet requires 5 seconds of acceleration from rest to cover a 94 m distance. What was the acceleration?
When ever there is a change in Velocity, there will be Acceleration. Let us now understand the concept of Acceleration with illustrative examples.
Let's suppose I have a car moving with a constant Velocity of 90 km along a straight line. It can be seen that the helicopter flying at roughly a speed of 20,000 km.
using the equation of motion formula;
S = ut + 1/2 + at²
Given,
S = 94 m
t = 5 sec
U = 0 initial velocity
S = ut + 1/2at²
94 = 0 + 1/2a 5²
a = (94 × 2)/ 25
Acceleration = 7.52 m/s²
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14. Sometimes, gas particles are similar to
billiard balls on a pool table. Explain how their
behavior is similar.
Like the Bullard balls on a pool table, gas particles are ubiquitous, so they are similar.
When two billiard balls collide the collision is nearly elastic. In an elastic collision the kinetic energy of the system is conserved before and after the collision. Therefore for simplicity, we can assume that the collision with the billiard ball is perfectly elastic. Momentum is conserved regardless of the type of impact. This means that the total momentum of all colliding objects before the collision is equal to the total momentum after the collision.
If you hit straight and the cue ball stops at impact the cue ball's momentum should all be eight This is because momentum is conserved Hitting diagonally keeps both balls moving after the collision. That is ball one exerts the same force on the ball two as ball two exerts on ball one This way momentum is conserved, so every time ball two gains momentum ball one loses This is Newton's third law.
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Is Your weight
determined by
gravity?
Answer:
Yes, because you would weigh differently on the moon, than on earth,
Explanation:
Can I have brainliest? It would help me out, if not thanks anyways! Hope this helped and have a nice day :)
Answer:
yes
Explanation:
the wight of an object is determined by the pull of gravity on it
Christian wants to determine how the amount of time a student spent studying affects how they perform on a test. He surveys each member of his class and ask how much time they spent studying. What is the independent or dependent and controlled variables
In a scientific experiment, an independent variable is a variable that is altered or controlled to see how it affects the dependent variable.
In a scientific experiment, the variable under test and being measured is known as the dependent variable.
The independent variable determines how reliant the dependent variable is. The impact on the dependent variable of changing the independent variable is tracked and documented by the experimenter.
An experimental component that remains constant and unaltered during the course of an investigation is known as a control variable in science.
Christian is interested in seeing how a student's performance on an exam is impacted by the amount of time they spent studying. He conducts a class survey and inquires about the amount of time each student spent studying.
The independent variable is the time they spent studying, the dependent variable is the amount of time studying and how it helps the test.
The controlled variable is the amount of time studying and how it helps the test.
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A farmer builds three sections of a fence, as shown in the figure, where =10.00
m, and gets tired. Walking straight back to where he started, how far did he have to go?
The total distance traveled by the farmer is 60 and walking straight back to where he started he will travel 10 m.
What is distance traveled by an object?
Distance traveled is the total length of the path traveled between two positions.
Distance traveled is not a vector because it has no direction, so we say that distance is a scalar quantity.
If the farmer builds a 3 sections of fence, it will form a triangle of equal lengths.
If the distance between each section = 10 m
when the farmer travels from the initial position to the final position, and then back to the initial position, the total distance traveled by the farmer is calculated as follows;
d = 2(10 m + 10 m + 10 m)
d = 2(30 m)
d = 60 m
Thus, the total distance traveled by the farmer is 60 and walking straight back to where he started he will travel 10 m.
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which option gives an objects temperature in SI units?
It takes 8.8 seconds for a stone that is dropped from rest to fall to the bottom of a mine shaft. The depth of the mine shaft is Blank .
Calculate the answer by read surrounding text. m. Round your answer to 1 decimal place.
The depth of the mine shaft is Blank is 379.5 m.
Equation :Using,
d = (1/2) g t²
where,
g is gravity and t is time given,
d = (1/2)(9.8)(77.44)
d = 379.5 m.
What is gravity ?Gravity, also known as gravitational force, is the attraction between any two objects in the universe. The attraction force is proportional to the weight of the object and the sq of the distance among them. It is without a doubt the weakest known natural force. An invisible force that attracts objects to one another. Gravity is what continues to keep you on the ground and causes things to fall. An animation of gravity in action. Albert Einstein defined gravity as a space-time curve that wraps around an object like a star or planet.
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