Answers
Newton's first law is about inertia, it states that if a body is at rest or moving at a constant speed, it will maintain that state at least an external force was exerted on such object.
An important fact is that this concept was previously introduced by Galileo, the phenomena of inertia belong to him before Newton.
Therefore, the correct answer is 3 because Galileo introduced inertia first from his observations.Related Questions
Which part of a circuit can be turned on and off to make an electromagnet
work or stop?
A. The ammeter
B. The connecting wires
C. The magnetism
D. The electric current
Answers
Blocks 1 and 2 are connected by a light string that passes over a pulley with negligible mass and friction, as shown in the figure. Block 1 is on a table covered with two different materials, A and B. The two-block system is released from rest, and the speed of block 1 begins to increase. When block 1 reaches material B, its speed increases at a greater rate. Which of the following correctly compares the coefficient of kinetic friction m between block 1 and the two materials and describes the change in the magnitude of the net force on block 2 as block 1 slides from material A to material B?
Answers
The coefficient of kinetic friction on material B is greater than material A, causing an increase in net force on block 2.
The coefficient of kinetic friction between block 1 and material B is greater than that between block 1 and material A, which causes an increase in the net force acting on block 2 as block 1 slides from material A to material B.
This is because the increased friction on material B results in a greater opposing force to the motion of block 1, which in turn causes a greater tension force on the string and therefore a greater net force on block 2.
This effect is due to the properties of the different materials and the interaction between the materials and the block, which ultimately determine the amount of friction present and the resulting force acting on the system.
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time quantum is defined in: group of answer choices shortest job scheduling algorithm priority scheduling algorithm round robin scheduling algorithm multilevel queue scheduling algorithm
Answers
In the round robin scheduling algorithm, time quantum is specified. As part of a theory that contends that time is not continuous, a chronon is a discrete and indivisible "unit" of time that is proposed.
A preemptive scheduler permits a certain process to operate for a brief period of time known as a quantum (or time slice). The process is put back in the ready queue after this amount of time and another one is put into the run state (i.e., the scheduler ensures that the processes take turns to run). Round Robin Scheduling fixes the time quantum before scheduling the processes such that no one process receives more CPU time than one time quantum at a time. The response time of the processes is too long if time quantum is too large, which could not be acceptable in an interactive environment.
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What principle does a heat engine take advantage of in order to use heat to perform work?
A. Magnets can convert motion into electrical energy
B. The speed of atoms increases when heat is added
C. Fluids expand when heat is added to them
D. Energy can be created from nothing
Answers
Step by step explanation- I took the quiz
When a skater pulls her arms in, it
reduces her moment of inertia from
2.12 kg m² to 0.699 kg-m². If she was
initially spinning 3.25 rad/s, what is
her final angular velocity?
Answers
The skater's final angular velocity is approximately 9.86 rad/s.
The skater's final angular velocity can be calculated using the principle of conservation of angular momentum. The equation for angular momentum is given by:
L = Iω
where L is the angular momentum, I is the moment of inertia, and ω is the angular velocity.
Initially, the skater has an angular momentum of:
L_initial = I_initial * ω_initial
Substituting the given values:
L_initial = 2.12 kg m² * 3.25 rad/s
The skater's final angular momentum remains the same, as angular momentum is conserved:
L_final = L_initial
The final moment of inertia is given as 0.699 kg m². Therefore, the final angular velocity can be calculated as:
L_final = I_final * ω_final
0.699 kg m² * ω_final = 2.12 kg m² * 3.25 rad/s
Solving for ω_final:
ω_final = (2.12 kg m² * 3.25 rad/s) / 0.699 kg m²
Hence, the skater's final angular velocity is approximately 9.86 rad/s.
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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
Assume you are a trainer at a local gym. There is evidence that intense or exhaustive physical exercise can increase the production of free radicals. Antioxidants can be used to combat the damage caused by free radicals. One of your competitive athletes has heard bits and pieces of this information and asks you more about it. How would you counsel him?
Use language that the average person will understand, respond to this athlete and be sure to include the following information as a part of your response:
What is meant by oxidation and why can it be damaging to cells?What are free radicals?Why do we produce free radicals if they can damage my body?What are antioxidants? How do antioxidants combat free radicals?What foods are high in antioxidants?Should your friend buy an antioxidant supplement?
Answers
Free radicals are molecules that have an unpaired electron. They can damage cells and tissues by stealing electrons from other molecules in the body, which can lead to a chain reaction of damage.
While it's true that free radicals can damage our bodies, they are also produced as a natural byproduct of our body's normal metabolic processes. In fact, exercise is just one of the many ways that our bodies produce free radicals.
Antioxidants are molecules that can neutralize free radicals by donating an electron to them, without becoming unstable themselves. This can help to prevent the chain reaction of damage that free radicals can cause.
There are many foods that are high in antioxidants, including fruits and vegetables such as blueberries, strawberries, spinach, and kale. Other sources of antioxidants include nuts, seeds, and whole grains.
While it's always a good idea to get your nutrients from whole foods, there are also many antioxidant supplements available on the market. However, research has shown that these supplements may not be as effective as getting antioxidants from whole foods. In fact, some studies have even suggested that high-dose antioxidant supplements could be harmfulin some cases.
My advice would be to focus on getting your antioxidants from whole foods, rather than supplements. By eating a balanced diet that includes plenty of fruits, vegetables, nuts, seeds, and whole grains, you can help to combat the damage caused by free radicals and support your overall health. Additionally, it's important to remember that exercise is still an important part of a healthy lifestyle, and the benefits of exercise far outweigh the potential risks of free radical damage.
According to Dr. Ridel's Levels of Critical Thinking in Chapter 1, what level of critical thinking applies to your current status?
Answers
The levels of critical thinking classify people into six categories depending on their ability to reflect.
What is critical thinking?This refers to the ability to analyze information, situations, etc. as well as apply, synthesize or evaluate the information learned.
What are the levels?According to Dr. Ridel, the levels are:
Unreflective thinking: They do not reflect on information and lack the skills to have critical thinking.Challenged thinker: This person knows critical thinking is important but has difficulties to have critical thinking.Practicing thinker: This person has better-thinking abilities.Advanced thinker: This person can critically think and has the skills to improve this process.Master thinker: This person is in control of this process and shows superior thinking abilities.Learn more about critical thinking in: https://brainly.com/question/12980631
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What is the mean of the data set [3, 2, 2, 12, 6, 5, 14, 4]?
2
4
6
7
Answers
Answer:6
Explanation:
Answer:
6
Explanation:
find the resultant of the two velocity vector and the angle that the resultant moves with the first vector
Answers
Answer:
Explanation:
To find the resultant of two velocity vectors, we can use vector addition. Given two velocity vectors v1 and v2, their resultant vector vR can be found by adding the two vectors:
vR = v1 + v2
The angle that the resultant moves with the first vector can be found using trigonometry. If we let theta be the angle between v1 and vR, then we can use the following formula:
tan(theta) = (vR_y / vR_x)
where vR_x is the x-component of the resultant vector and vR_y is the y-component of the resultant vector.
Alternatively, we can use the dot product to find the angle between the two vectors. The dot product of two vectors is defined as:
v1 . v2 = |v1| |v2| cos(theta)
where |v1| and |v2| are the magnitudes of the vectors and theta is the angle between them. Solving for theta, we get:
theta = acos((v1 . v2) / (|v1| |v2|))
where acos is the inverse cosine function.
To summarize:
Find the resultant vector vR by adding the two velocity vectors v1 and v2: vR = v1 + v2
Find the angle theta between v1 and vR using either the tangent formula or the dot product formula:
a. tan(theta) = (vR_y / vR_x)
b. theta = acos((v1 . v2) / (|v1| |v2|))
what is the slope of the line represent on a velocity vs time graph
Answers
Answer:
acceleration
Explanation:
Which of the following is an example of a noncontrolled substance?
A. Sleeping pills
B. Coffee
C. Pain medications
D. Cough medications
SUBMIT
Answers
An example of noncontrolled substance from the option is Cough medications.
What are Noncontrolled substances?Noncontrolled substances are substances that are prescribed by medical personnel or pharmaceutical professionals for treatment of a disorder or ailments that is affecting a person.
Noncontrolled substances include medications that are majorly prescribed for treatment of medical conditions like high blood pressure, diabetes, and bacterial infections.
Therefore, An example of noncontrolled substance from the option is Cough medications.
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34)
Elements are composed of
A)
many type of atoms.
B)
the same type of atom.
C)
many different compounds.
D)
the same type of compound.
Answers
03: Hook's law suggests that F is directly proportional to -x, how much true you have found this statement in your experiment? Explain any differences.
Answers
Hooke's Law can be given as follows sometimes:
The restoring force of a spring is equal to the spring constant multiplied by the displacement from its normal position:
F = -kx
Where, F = Restoring force of a spring (Newtons, N)
k = Spring constant (N/m)
x = Displacement of the spring (m)
The negative sign relates to the direction of the applied force and by convention, the minus or negative sign is present in F = -kx. The restoring force F is directly proportional to the displacement (x), according to Hooke's law. When the spring is compressed, the displacement (x) is negative. It is zero when the spring is at its original length and positive when the spring is extended.
Practically, Hooke's Law is applicable only within a limited frame of reference, and through experimenting, this statement proves to be true. Because materials cannot be compressed beyond a certain size or expanded beyond a certain size without some permanent deformation or change of their original state.
The law only applies under some conditions such as a limited amount of force or deformation. Factually, many materials will noticeably deviate from Hooke's law even before those elastic limits are reached.
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This is a whole quiz please answer ill make as many points as i can. Btw this is pickleball
Question 1 10 pts
The ___________________ rule says the ball must bounce one on each side before either team may start volleying the ball in the air.
Group of answer choices
Double Bounce
Volley Bounce
Bounce
Two Bounce
Flag this Question
Question 2 10 pts
The player standing in the _____________ service court is always the firsts server.
Group of answer choices
right
left
No answer text provided.
No answer text provided.
Flag this Question
Question 3 10 pts
Each game is played to ___________ points, won by _________.
Group of answer choices
11, 2
21,1
15,1
12,2
Flag this Question
Question 4 10 pts
According to one of the inventors, the game was officially named after a family dog, Pickles, who would chase the ball and run off with it.
Group of answer choices
True
False
Flag this Question
Question 5 10 pts
Pickleball is played on a court the size of a Badminton court with what looks like an oversized ping pong paddle and a __________ball.
Group of answer choices
whiffle
tennis
paddle
boccee
Flag this Question
Question 6 10 pts
In Pickleball, there are two non-volley lines, which create an area called the _______ .
Group of answer choices
Kitchen
Ally
Drop Zone
Dead Area
Flag this Question
Question 7 10 pts
Only the receiving team can score a point by winning a rally.
Group of answer choices
True
False
Flag this Question
Question 8 10 pts
Pickleball combines elements of Badminton, Tennis and ____________.
Group of answer choices
Ping Pong
volleyball
Bocce
Four Square
Flag this Question
Question 9 10 pts
Players may not hit the ball while standing in the kitchen unless the ball has already bounced on their side.
Group of answer choices
True
False
Flag this Question
Question 10 10 pts
Before serving, the server must call the score.
Group of answer choices
True
False
Answers
Answer:
1- bounce rule
2- left
3-11,2
4-true
5- whiffle ball
6- kitchen
7-false
8- ping pong
9- true
10- true
Explanation:
I'm pre5sure they are all right. brainliest please
Answer: I had the same quiz too I’m only doing so the other guy can get brainliest
Explanation:Kfkfkfjgjggj
Object A is 71 degrees and object B is 75 degrees how will thermal energy flow
Answers
Given :
Object A is 71 degrees and object B is 75 degrees .
To Find :
How will thermal energy flow.
Solution :
We know, by law of thermodynamics thermal energy will flow from higher temperature to lower temperature.
So, in the given question energy will flow from object B from object A.
Hence, this is the required solution.
A uniform electric field exists everywhere in the x,y plane. The electric field has a magnitude of 3500 N/coil, and is directed in the positive x direction. A point charge of -9.0 x 10-9 coil is placed at the origin. Determine the magnitude of the net electric field at: (a) x
Answers
Answer:
5525 N/C
Explanation:
Magnitude of electric field ( E ) = 3500 N/c
Direction of electric field : positive X axis
point charge ( q ) = -9.0 * 10^-9
Calculate the Magnitude of the net electric field at (a) x = -0.20 m
Magnitude = 5525 N/C
Electric field due to q = ( 9 * 10^9 * 9 * 10^-9 ) / ( -0.2 )^2
= 81 / 0.04 = 2025 N/c
Therefore the magnitude of the net electric field
= 2025 + 3500
= 5525 N/C
i need help question confuseing
Answers
Answer:
could you tell me what the question is pls, that way I can help you
Explanation:
3. A car with a mass of 1600 kg has a kinetic energy of 125 000 J. How fast is it moving?
Answers
The car is moving at approximately 12.5 meters per second.
The kinetic energy (KE) of an object can be calculated using the formula:
KE = 1/2 * m * \(v^2\)
where
KE = kinetic energy,
m =Mass of the object, and
v = velocity.
In this case, we are given the mass (m) of the car as 1600 kg and the kinetic energy (KE) as 125,000 J. To find the velocity .
Substituting the values , we have:
125,000 J = 1/2 * 1600 kg *\(v^2\)
Now, we can solve for v by rearranging the equation:
\(v^2\) = (2 * 125,000 J) / 1600 kg
\(v^2\) = 156.25 \(m^2/s^2\)
Taking the square root, we find:
v = √156.25\(m^2/s^2\)
v ≈ 12.5 m/s
Therefore, the car is moving at approximately 12.5 meters per second.
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The vapor pressure of liquid ethanol, C2H5OH, is 100. mm Hg at 308 K.
A sample of C2H5OH is placed in a closed, evacuated 529 mL container at a temperature of 308 K. It is found that all of the C2H5OH is in the vapor phase and that the pressure is 67.0 mm Hg. If the volume of the container is reduced to 344 mL at constant temperature, which of the following statements are correct?
Choose all that apply.
a. The pressure in the container will be 103 mm Hg.
b. Some of the vapor initially present will condense.
c. Liquid ethanol will be present.
d. Only ethanol vapor will be present.
e. No condensation will occur.
B
Answers
The statements that apply are;
The pressure in the container will be 103 mm Hg. Some of the vapor initially present will condense.Liquid ethanol will be present.What is the new pressure?We know that the pressure can be taken as the force with which the molecules of the substance are able to hit the walls of the container in this case, we need to obtain the pressure of the ethanol vapor when the volume has been reduced.
Using
P1 = initial pressure
P2 = final pressure
V 1 = initial volume
V2 = final volume
By the use of the Boyle's law we have;
P1V1 = P2V2
P2 = P1V1 /V2
P2 = 67.0 * 529/344
P2 = 103 mmHg
Thus, as the volume is reduced there would be an increase in the pressure and some of the ethanol would condense and we would have liquid ethanol in the system.
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if you jump off of a wagon moves backwards, what is the action force? reaction force? & what newton law is this?
Answers
The action force is the force caused by you jumping off of the wagon, which is downward.
The reaction force is the wagon pushing back at you, upward.
This is Newton's Third Law of motion.
in a generator as the magnet spins opposite poles of the magnet push the electrons in opposite directions this back and forth movement of electrons is called
Answers
Answer: In a generator, the back and forth movement of electrons as the magnet spins and opposite poles of the magnet push the electrons in opposite directions is called Alternating Current (AC).
Explanation:
Answer:
alternating current and direct current
Explanation:
yall some of these questions arent that hard, use common sense
2. You are traveling along a highway at night at a speed of 100 km/h when you spot an object directly in front of you in the road at the limit of your headlights. (10 Marks)
a) If the maximum braking deceleration that your car can provide is 7 m/s2, and if your headlights extend out to a range of 30 m, will you hit the object before coming to a stop?
b) How long will it take to stop?
Answers
a) To determine if the car will hit the object before coming to a stop, we need to calculate the distance required to stop the car, assuming maximum braking deceleration. We can use the following formula:
d = (v^2) / (2a)
where:
d = distance required to stop
v = initial velocity
a = acceleration/deceleration
In this case, v = 100 km/h = 27.78 m/s (converted from km/h to m/s)
a = -7 m/s^2 (negative sign indicates deceleration)
We know that the car's headlights extend out to a range of 30 m, so if the distance required to stop the car is greater than 30 m, the car will hit the object before coming to a stop.
Plugging in the values to the formula, we get:
d = (27.78^2) / (2 x -7) = 108.61 m
Since 108.61 m is greater than 30 m, the car will hit the object before coming to a stop.
b) To calculate the time required to stop, we can use the following formula:
t = v / a
where:
t = time required to stop
v = initial velocity
a = acceleration/deceleration
Plugging in the values, we get:
t = 27.78 / 7 = 3.97 s
Therefore, it will take 3.97 seconds to stop the car.
In hiking, what fitness component is required of you
Answers
Question 2 of 10
X-ray technology can be used to do which of the following?
O A. Photograph through solid objects
B. Monitor human activity at night
OC. Speed up the process of hardening paint
O D. Communicate across long distances
SUBMIT
Answers
X-ray technology can be used to do Photograph through solid objects. option A
What is X-ray technology about?X-ray technology includes the utilize of high-energy electromagnetic radiation to make pictures of the interior of objects, counting the human body. X-rays are a sort of electromagnetic radiation with wavelengths shorter than unmistakable light, but longer than gamma beams.
X-ray innovations includes the use of high-energy electromagnetic radiation to make pictures of the interior of objects, counting the human body. X-rays are a sort of electromagnetic radiation with wavelengths shorter than visible light, but longer than gamma beams.
Lastly, X-ray innovation is utilized in a assortment of other applications, such as air terminal security scanners, which utilize X-rays to form pictures of gear and other objects to distinguish potential dangers.
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(c) The angular velocity of a disc of mass 3 kg and radius 0.6 m changes from 10 rev/s to 15 rev/s in 0.07 s. Calculate the impulse and the torque on the disc.
Answers
Impulse = change in momentum = m * (v2 - v1)
Torque = moment of inertia * angular acceleration
First, let's calculate the moment of inertia of the disc:
I = (1/2) * m * r^2
I = (1/2) * 3 kg * (0.6 m)^2
I = 0.54 kg * m^2
Next, let's calculate the angular acceleration:
alpha = (omega2 - omega1) / t
alpha = (15 rev/s - 10 rev/s) / 0.07 s
alpha = 71.4 rad/s^2
Now we can calculate the impulse:
Impulse = m * (v2 - v1)
Impulse = 3 kg * ((2 * pi * 0.6 m * 15 rev/s) - (2 * pi * 0.6 m * 10 rev/s))
Impulse = 113.1 Ns
Finally, we can calculate the torque:
Torque = moment of inertia * angular acceleration
Torque = 0.54 kg * m^2 * 71.4 rad/s^2
Torque = 38.6 Nm
Therefore, the impulse on the disc is 113.1 Ns and the torque on the disc is 38.6 Nm.
Consider the heaviest box of 150 pounds that you can push at constant speed across a level floor, where the coefficient of kinetic friction is 0.50, and estimate the maximum horizontal force that you can apply to the box. A box sits on a ramp that is inclined at an angle of 60 degrees above the horizontal. The coefficient of kinetic friction between the box and the ramp is 0.50. If you apply that same magnitude force, now parallel to the ramp, that you applied to the box on the floor, what is the heaviest box (in pounds) that you can push up the ramp at a constant speed?
Answers
We can deduce here that the maximum horizontal force that you can apply to the box is 150 pounds. Thus, the heaviest box that you can push up the ramp at a constant speed is 75 pounds.
How we arrived at the solution?Given the following:
Maximum horizontal force = 150 pounds
Coefficient of kinetic friction = 0.50
Weight of the box = 150 pounds
Angle of the ramp = 60°
Normal force = Weight of the box * Cosine of the angle of the ramp
= 150 pounds × Cos(60°)
= 75 pounds.
Force of friction = Coefficient of kinetic friction × Normal force
= 0.50 × 75 pounds
= 37.5 pounds
Maximum force that can be applied to the box = Weight of the box × Cosine of the angle of the ramp - Force of friction
= 150 pounds × Cos(60°) - 37.5 pounds
= 75 pounds
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vertical columns in the periodic table represent a group or family of elements that have the same number of valence electrons by having similar electron configurations elements in the same group have similar properties list elements that have similar properties
Answers
The examples of elements with similar properties in the same group are fluorine, chlorine, bromine and iodine.
What is group of elements in a periodic table?
The groups in periodic table is the same as vertical columns in the periodic table
These groups represent a group or family of elements that have the same number of valence electrons by having similar electron configurations elements in the same group have similar properties.
Examples of elements found in the same group with similar chemical properties include;
group 7 elements.
FluorineChlorineBromineIodineThe valence electron of elements found in the group 7 of periodic table is negative 1 (-1).
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Deduce the first
equation
of motion matematical method
Answers
Answer:
The answer is below
Explanation:
Equation of motion is a term in physics that is used in explaining the characteristics of a physical system concerning its motion while considering the period.
The First Equation of Motion is given as v = u + at
Here, a = acceleration, v = final velocity, u = initial velocity, and t = time
To deduce it algebraically, it is written as
a = (v - u) ÷ t
Therefore, it can be repositioned to => v = u + a * t
(a) Express the following in their respective units
12nm to pm
Answers
Answer:
To convert nanometers (nm) to picometers (pm), you need to multiply the value by 1,000. Therefore, to convert 12 nanometers to picometers, you would perform the following calculation:
12 nm * 1,000 pm/nm = 12,000 pm
So, 12 nanometers is equal to 12,000 picometers.