The angular acceleration of the UNF's shuttle tires assuming they do not slip on the pavement is 16.67 rad/s².
Given the acceleration of the UNF's shuttle deaccelerating on a very quick stop is 5.00 m/s² and the radius of its tire is 0.30 m. We need to find the angular acceleration of the tire assuming it does not slip on the pavement.Angular acceleration:It is the rate of change of angular velocity over time.
It is denoted by α and is given by:α = Δω / ΔtAngular velocity:It is the rate of change of angular displacement over time. It is denoted by ω and is given by:ω = Δθ / ΔtHere, Δθ is the change in the angle of rotation, and Δt is the change in time.The formula to find the angular acceleration is given by;α = a / r
Where a is the linear acceleration of the vehicle and r is the radius of the wheel.Substituting the values,α = a / rα = 5.00 / 0.30α = 16.67 rad/s²Therefore, the angular acceleration of the UNF's shuttle tires assuming they do not slip on the pavement is 16.67 rad/s².
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tom and his group were making a poster for their classroom to depict the way that electricity and magnetism work together which of the following should the group to their poster
Currents can be created by magnetic fields. A current is capable of creating a magnetic field.
What are the interactions between electricity and magnetism?Magnetic fields are constantly shifting, pushing and pulling electrons. Metals like copper and aluminium have slackly held electrons. As a magnet is moved around a wire or a coil of wire, the electrons in the wire are pushed, creating an electrical current.
Is sound energy potential or kinetic?Sound energy can be made up of both kinetic and potential energy. A musical instrument is one possible illustration. When the instrument is performed, sound waves are produced that have kinetic energy. Nevertheless, potential energy is all that is present when that same musical instrument is at rest.
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Identify the possible source of Earth's magnetic field.
Answer:
The magnetic field is generated by electric currents due to the motion of convection currents of a mixture of molten iron and nickel in the Earth's outer core: these convection currents are caused by heat escaping from the core, a natural process called a geodynamo.Explanation:
\(hii\)
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If i place a 300 g mass 20cm from the pivot, what mass, in g, will i have to place 30 cm from the pivot so that my torque bar will be balanced?
To balance the torque bar, we can use the equation: torque = force x distance. In this case, the torque on one side of the pivot should be equal to the torque on the other side.
For the first scenario, the torque is calculated as follows:
Torque1 = (300 g) x (20 cm)
To balance the torque bar, we need to find the mass that should be placed 30 cm from the pivot. Let's call it mass2. The torque equation for this scenario will be:
Torque2 = (mass2 g) x (30 cm)
Since the torque on both sides of the pivot should be balanced, we can set up the equation:
Torque1 = Torque2
(300 g) x (20 cm) = (mass2 g) x (30 cm)
To solve for mass2, we can divide both sides of the equation by 30 cm:
(300 g) x (20 cm) / (30 cm) = mass2 g
After simplifying, we find that mass2 is approximately 200 g.
In summary:
You will have to place a mass of approximately 200 g 30 cm from the pivot to balance the torque bar.
By equating the torques on both sides of the pivot, we can determine the mass required. The torque equation for each side of the pivot is set equal to each other, and by solving the equation, we find that the mass needed is approximately 200 g.
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An object is placed 60 em from a converging ('convex') lens with a focal length of magnitude 10 cm. What is is the magnification? A) -0.10 B) 0.10 C) 0.15 D) 0.20 E) -0.20
An object is placed 60 em from a converging ('convex') lens with a focal length of magnitude 10 cm. The magnification is -0.20.So option E is correct.
To find the magnification of an object placed in front of a converging lens, we can use the lens formula:
1/f = 1/do - 1/di
where f is the focal length of the lens, do is the object distance (distance of the object from the lens), and di is the image distance (distance of the image from the lens).
In this case, the object distance (do) is given as 60 cm, and the focal length (f) is 10 cm.
Substituting the given values into the lens formula:
1/10 = 1/60 - 1/di
Simplifying the equation:
1/10 = (60 - di)/ (60 × di)
Cross-multiplying:
di = (60 × di) / 10 - (60 ×di) / 60
di = 6di - di
di = 5di
di = do/5
The magnification (m) is given by:
m = -di / do
Substituting the values:
m = -(do/5) / do
m = -1/5
Therefore, the magnification is -0.20. Therefore option E is correct.
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HELPPP!!! I will give Brainliest!!! super easy question
I have a question. If a question has the numbers 500kg and 3000N, how many significant digits should the answer have?
Answer:
most likely just 1
Explanation:
I sucked at sig figs in middle school, in fact it was the lowest test grade i ever received, but it is relatively simple.
because there is only one sig fig involved in each number, there can't be multiple sig figs here. 3000/500=6
500/3000=2(round up from 1.66666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666) you get the point.
who was the scientist that discovered a magnetic field could be created by passing an electric current through a wire? AOerstedBNewtonCEinsteinDMaxwell
Oersted the scientist that discovered a magnetic field could be created by passing an electric current through a wire. So, option A is the correct option.
The scientist who discovered that a magnetic field could be created by passing an electric current through a wire is Hans Christian Oersted. He made this discovery in 1820, which laid the foundation for the relationship between electricity and magnetism.
Oersted set up a simple circuit consisting of a battery, a switch, and a wire. He placed a compass near the wire, which was used to detect magnetic fields.
When the switch was closed, allowing the electric current to flow through the wire, he observed that the compass needle moved, indicating the presence of a magnetic field.
He noticed that the direction of the needle changed when the direction of the electric current was reversed. Oersted's experiment demonstrated that a magnetic field could be created by an electric current, which was a groundbreaking discovery in the field of electromagnetism.
This finding led to the development of further scientific theories and advancements, such as Maxwell's equations and the development of electromagnets, motors, and generators.
Option A is the correct option.
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9.Two people are pushing a broken down car. One pushes 2 m/s east, the other a
1.5 m/s east. Do they have the same or different velocity? why
Answer:
No, they don't have the same velocity
Explanation:
Given that one person pushes the car 2 m/s east, and the other pushes the car 1.5 m/s east.
As velocity is a vector quantity, so, to have equal velocity, both magnitude as well as the direction must be equal.
For the first person:
Magnitute of the velocity = 2 m/s.
The direction of the velocity: Towards east.
For the second person:
Magnitute of the velocity = 1.5 m/s.
The direction of the velocity: Towards east.
As both the person have the same direction but the different magnitude of the velocity, so, they don't have the same velocity.
A man is pulling on his dog with a force of 34.7 N directed at an angle of 24.4° to the horizontal. Find the x component of this force.
Answer:
\(31.7\:\mathrm{N}\)
Explanation:
We can use basic trig in a right triangle to solve this problem. Let the x component of the force be \(x\). We have the following equation:
\(\cos 24^{\circ}=\frac{x}{34.7},\\x=34.7\cos 24^{\circ}\approx \boxed{31.7}\)
1. A 3 bladed fan is spinning at 16.7 revs/sec in a very dark room. If a flashing light (called a strobe light) flashes at just the right frequency, the spinning blades look motionless. What is the shortest time, in seconds, between flashes that will make the fan appear to be stopped?
Answer:
P = 1 / f = 1 / 16.7 = .06 sec period of 1 revolution
Period of 1/3 revolution = .06 s / 3 = .02 sec
If the light flashes every .02 sec the fan will appear motionless
Please help: "A runner moves 2.38 m/s north. She accelerates at 0.310 m/s² at a -62.0° angle. How many seconds later is she running directly east?" Thanks!
According to equations of motion, we get after 8.70 seconds she running directly east.
Which are the 3 equations of motion?Three equations of motion, commonly referred to as the laws of constant acceleration, exist for uniform acceleration. In order to derive the components such as displacement(s), velocity(initial and final), time(t), and acceleration(a), these equations are used.These are the three equations:
v = v₀ + ats = v₀ t + ½at. v= v₀ + 2as.Given :
v₀ = 2.38 m/s
v = 0 m/s
a = 0.310 sin (-62.0°) m/s²
to find time t :
v = at + v₀
0 m/s = (0.310 sin (-62.0°) m/s²) t + (2.38 m/s)
t = 8.70 s
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A 515-kg roller coaster is at the bottom of a loop with a radius of 10 m. If the speed at the
Bottom of the loop is 20 m/s, what is the force of the track pushing up on the vehicle at this
point?
Answer:
20600N
Explanation:
Given parameters:
Mass of the roller coaster = 515kg
radius = 10m
Speed = 20m/s
Unknown:
Force of the track pushing up on the vehicle = ?
Solution:
The force pulling the roller coaster along the track is the centripetal force.
To find the centripetal force, use the expression below;
F = \(\frac{mv^{2} }{r}\)
where;
m is the mass
v is the speed
r is the radius
Now insert the parameters and solve;
F = \(\frac{515 x 20^{2} }{10}\) = 20600N
Please help ACTUALLY ANSWER i dont understand CER writing?
this is an example:
Claim: cookies are good because they are good
evidence : ¨cookies have 1 billion protien¨- the new york times
reasoning: (what would i put here???)
PLEASE HELP AND ACTUALLUY ANSWER
The daily breezes that occur in a city that is located
large body of water are examples of ?
a. local winds.
b. monsoons.
c. global winds.
d. westerlies.
The engine starter and a headlight of a car are connected in parallel to the 12.0-V car battery. In this situation, the headlight operates at 38 W and the engine starter operates at 2.40 kW. If the headlight and starter were then rewired to be in series with each other, what total power would they consume when connected to the 12.0-V battery
Answer:
The total power they will consume in series is approximately 2.257 W
Explanation:
The connection arrangement of the headlight and the engine starter = Parallel to the battery
The voltage of the battery, V = 12.0 V
The power at which the headlight operates in parallel, \(P_{headlight}\) = 38 W
The power at which the kick starter operates in parallel, \(P_{kick \ starter}\) = 2.40 kW
We have;
P = V²/R
Where;
R = The resistance
V = The voltage = 12 V (The voltage is the same in parallel circuit)
For the headlight, we have;
R₁ = V²/\(P_{headlight}\) = 12²/38 = 72/19
R₁ = 72/19 Ω
For the kick starter, we have;
R₂ = V²/\(P_{kick \ starter}\) = 12²/2.4 = 60
R₂ = 60 Ω
When the headlight and kick starter are rewired to be in series, we have;
Total resistance, R = R₁ + R₂
Therefore;
R = ((72/19) + 60) Ω = (1212/19) Ω
The current flowing, I = V/R
∴ I = 12 V/(1212/19) Ω = (19/101) A
We note that power, P = I²R
In the series connection, we have;
\(P_{headlight}\) = I² × R₁
∴ \(P_{headlight}\) = ((19/101) A)² × 72/19 Ω = 1368/10201 W ≈ 0.134 W
The power at which the headlight operates in series, \(P_{headlight, S}\) ≈ 0.134 W
\(P_{kick \ starter}\) = ((19/101) A)² × 60 Ω = 21660/10201 W ≈ 2.123 W
The power at which the kick starter operates in series, \(P_{kick \ starter, S}\) ≈ 2.123 W
The total power they will consume, \(P_{Total}\) = \(P_{headlight, S}\) + \(P_{kick \ starter, S}\)
Therefore;
\(P_{Total}\) ≈ 0.134 W + 2.123 W = 2.257 W
Can something stay at one point and still be in motion? Why or Why Not?
Answer:
Yes
Explanation:
It is possible because a stone on the ground is at rest with respect to earth but at the same time earth is moving around the sun. That means everything on earth is moving so with respect to sun the stone is also moving. That is how the stone is in rest also and is in motion also.
is the normal force on an object equal to its mass times gravity? group of answer choices yes, always sometimes no, never
M represents the mass of the object that is sliding, g is the velocity caused by gravity, and is the angle of inclination. The product of gravity weight and the sine of the inclination angle is the normal force, or FN.
Do all objects experience the same level of gravity?Higher mass objects are subject to stronger gravity. Gravity lessens as distance increases as well. As a result, the closer two objects are to one another, the stronger their gravitational pull is. The Earth's mass is what generates gravity.
There is no force like gravity.The force of the spring, which the mass is subjected to when it is raised, is opposite and equal to the force of gravity. We can then conclude that the springs is equivalent to and resists the gravitational force because mass would otherwise be pulled by the net force.
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Un ladrillo de 2kg que se encuentra a 200º c, se sumerge en 5 kg de agua a 32º¿a que temperatura se alcanza el equilibrio térmico?
Answer:
El equilibrio térmico se alcanzará a los 152ºC.
Explanation:
Dado que un ladrillo de 2kg que se encuentra a 200º c, se sumerge en 5 kg de agua a 32º, para determinar a qué temperatura se alcanza el equilibrio térmico se debe realizar el siguiente cálculo:
2+5 = 7
(200 x 5 + 32 x 2) / 7 = X
1064 / 7 = X
152 = X
Por lo tanto, el equilibrio térmico se alcanzará a los 152ºC.
digital thermometer is more advance than Mercury thermometer why
Answer:
Digital thermometers are more reliable in the modern world today.
Explanation:
Digital thermometers provide faster results. Digital thermometers provide fast results as opposed to mercury thermometers whose readings are slower to realize because you have to wait for the mercury to heat and then slowly rise to display the temperature.
An auto race takes place on a circular track. A car completes one lap in a time of 18.1 s, with an average tangential speed of 42.9 m/s. Find the average angular speed and the radius of the track
The average angular speed of the car in the auto race is approximately 3.89 radians per second, and the radius of the circular track is approximately 232.59 meters.
The average angular speed is found by dividing the total angle covered by the car in one lap (which is 2π radians) by the time taken to complete one lap. In this case, the time is given as 18.1 seconds.
Therefore, the average angular speed is calculated as 2π radians / 18.1 seconds ≈ 0.3491 radians per second.To determine the radius of the circular track, we can use the relationship between tangential speed and angular speed.
The tangential speed is the linear speed along the circular path. It is given as 42.9 m/s. The tangential speed is related to the angular speed and the radius by the equation v = ωr, where v is the tangential speed, ω is the angular speed, and r is the radius.
Rearranging the equation, we have r = v / ω. Plugging in the values, we get r = 42.9 m/s / 0.3491 radians per second ≈ 122.87 meters. Therefore, the radius of the circular track is approximately 122.87 meters.
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The coefficient of static friction between a block and the floor is 0.60 and the coefficient of kinetic friction
If a 20-kg block is pushed across the floor by a horizontal force with a constant speed. What is the force applied t
A)
50 N
B)
100 N
C)
120 N
D)
200 N
Answer: B) 100N
Explanation:usatestprep
What are the two factors that determine gravitational attraction?
The two factors that determine gravitational attraction force are- 1- Mass 2- distance. Gravity is an attractive force, one that attracts all of the matter in the Universe towards all of the other bits of matter in the Universe.
What is the factors that determine gravitational attraction?On the size scale of moons, planets, stars, and galaxies, it is an extremely important force, and governs much of the behavior of these objects.
Gravity keeps our feet firmly on the ground, keeps the Moon in orbit around the Earth, keeps the Earth in orbit around the Sun, keeps the Sun in orbit around the center of our Milky Way galaxy.
When dealing with the force of gravity between two objects, there are only two things that are important – mass, and distance. The force of gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them.
This can be determined by Sir Isaac Newton’s universal law of gravitation (F=Gmm/r2). According to which the gravitational attraction is directly dependent on the mass, while it is inversely dependent on the distance.
Therefore, This means that the force of gravity increases with mass, but decreases with increasing distance between objects.
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is vectors and motion in plane same?
Answer:
Plane Motion
Plane Motion One of the most common examples of motion in a plane is Projectile motion.
In a gravitational-free environment, an object of unknown mass is connected to a spring with k = 40 N/m. The spring is compressed .2 m to and released. At the moment the spring is released, the object accelerated at 3 \(m/s^{2}\). What is the mass of the object?
pls explain asap!!!
Newton's Third Law of Motion states that springs exert a restoring force when they are pulled. The relationship between the spring force, spring constant, and spring displacement is governed by Hooke's Law.
Mass of the object= k*x/a= 26kg
what is Hooke's law?
The force (F) required to extend or compress a spring by a certain distance (x) scales linearly with respect to that distance, according to the empirical law known as Hooke's law.
according to Hooke's law
f=-k x (-ve because spring is compressing)
from force equation f=ma m-=mass, a= acceleration , k=spring constant, x= displacemt due to compression
so, ma=-k x, (mass can not be -ve so remove -ve sign)
m=k x/a= 40*2/3=26.67 kg
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A man who weighs 75kg on the surface of the earth whose mass is 6*10^24kg. If the radius of earth is 6480km ,calculate the force of attraction between them.
Answer:
718.02N is the answer to the question
What is the density of a box
that has a mass of 35 g and
a volume of 17cm3? squared
No one has answered.....
what is the responsiveness of a thermometer?
A thermometer's responsiveness is measured by how quickly and precisely it can identify and react to temperature changes.
It shows how quickly a thermometer's reading changes to reflect the real temperature change in its surroundings.
Depending on the design, technology, and kind being used, thermometers might respond differently.
The sensitivity of the temperature sensor, the speed at which data is processed, as well as the design and calibration of the whole thermometer, are some elements that might influence how sensitive a thermometer is.
A highly responsive thermometer will typically offer quick readings that closely track temperature changes. This is crucial in circumstances requiring real-time temperature monitoring, such as those in scientific research, medicinal applications, or industrial activities.
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find the position,size,and nature of the image formed by a spherical mirror from the folllowing data.
f= -12cm
u= -36
h= 2cm
The position of the image is 35 cm from the concave mirror, the size of the image is approximately 1.944 cm, and the nature of the image is upright.
To determine the position, size, and nature of the image formed by a spherical mirror, we can use the mirror formula:
1/f = 1/v - 1/u
where:
f is the focal length of the mirror,
u is the object distance (distance of the object from the mirror),
v is the image distance (distance of the image from the mirror).
Given data:
f = -12 cm (negative sign indicates a concave mirror)
u = -36 cm (negative sign indicates that the object is located on the same side as the incident light)
h = 2 cm (height of the object)
Substituting the values into the mirror formula, we have:
1/-12 = 1/v - 1/-36
Simplifying the equation:
-1/12 = (36 - v)/36
-1/12 = (36 - v)/36
-1 = 36 - v
v = 36 - 1
v = 35 cm
The positive value for v indicates that the image is formed on the opposite side of the mirror from the object.
To find the size of the image, we can use the magnification formula:
magnification (m) = -v/u
Substituting the values:
m = -35/-36
m ≈ 0.972
Since the magnification is positive, it indicates an upright image.
The size of the image can be determined using the magnification formula:
m = image height (h')/object height (h)
0.972 = h'/2
h' ≈ 1.944 cm
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Which change corrects the error in his steps?
Charlie writes the steps shown to describe the use
of a transistor in a closed circuit with flowing current.
Using a Transistor to Amplify a Signal
1. Current (1) flows from the base to the emitter.
2. An input causes a small increase in voltage
across the base and emitter.
3. Ji increases a small amount.
4. Current (12) flowing from the emitter to the
collector changes a large amount.
O Change the title to "Using a Transistor as a
Switch."
O Change step 1 to say that no current flows in the
transistor at the start.
O Reverse the sizes of the changes in current in
steps 3 and 4.
O Reverse the direction of current in step 4.
Answer:
answer is D
Explanation:
took test and got 100%
The change that corrects the error in his steps is reverse the direction of current in step 4.
What is amplifier?An amplifier, is an electronic device that can be used to increase output power.
Observed steps in using a transistor to Amplify a SignalCurrent (1) flows from the base to the emitter. An input causes a small increase in voltage across the base and emitter. Ji increases a small amount.Current (2) flowing from the emitter to the collector changes a large amount.Thus, the change that corrects the error in his steps is reverse the direction of current in step 4.
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the
estimated age of the solar sysytem is 4558 million years, with N =
4.558, what is the value of the exponent, n?
The estimated age of the solar system is 4558 million years,
with N = 4.558.
The exponent n is a number that represents the power to which the base number is raised.
The exponential function is represented as xn, where x is the base and n is the exponent.
The question seeks to determine the value of n given N and the estimated age of the solar system.
The formula for calculating the value of n is:
N = 10n
Taking the logarithm of both sides, we get:
log(N) = log(10n)
Using the rule of logarithm, log(a^b) = b log(a), we can rewrite the equation as:
log(N) = n log(10)
Since log(10) = 1, we have:
n = log(N)
Substituting N with the estimated age of the solar system, we get:
n = log(4.558)
Using a calculator, we find that log(4.558) is approximately 0.6609.
the value of the exponent, n, is approximately 0.6609.
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Pressure sensor sensitivity is 11mV/ bar ,and 592/cm pot. level sensor for 1.5m range used for measuring tanklevel (Vs-9V, R1= 150 22),Design circuit to turn ON green LED if (the level is more than 64cm and pressure less than 4bar),led LED if water level is less than 20cm, turn on release valve if pressure is more than 11 bar. [20pts]
To design a circuit to turn on a green LED if the level is more than 64 cm and pressure is less than 4 bar, a red LED if the water level is less than 20 cm, and turn on the release valve if the pressure is more than 11 bar, we can follow the steps below:
Step 1: Firstly, let's draw the circuit diagram for the given problem.
Step 2: After drawing the circuit diagram, calculate the equivalent resistance (R1) using the formula:
1 / R1 = 1 / 150 + 1 / 22
R1 = 19.34 Ω ~ 19 Ω (approx.)
Step 3: Next, calculate the sensitivity of the 592 / cm potentiometer level sensor.
592 cm = 59.2 mV
Therefore, the sensitivity = 59.2 mV / 150 Ω = 0.394 mV / Ω
Step 4: Now, we need to calculate the output voltage of the level sensor for the given range of 1.5 m = 150 cm.
Minimum voltage = 20 cm × 0.394 mV / Ω = 7.88 mV
Maximum voltage = 64 cm × 0.394 mV / Ω = 25.22 mV
Step 5: Calculate the pressure sensor's output voltage for 4 bar using the sensitivity formula.
Sensitivity = 11 mV / bar
Output voltage for 4 bar = 4 bar × 11 mV / bar = 44 mV
Step 6: Based on the output voltage values from the level sensor and pressure sensor, we can design the required comparator circuits.
Comparator 1: Turn on green LED if level > 64 cm and pressure < 4 bar.
For this, we can use an LM358 comparator circuit.
Here, the output voltage of the level sensor is compared with a reference voltage of 25.22 mV (maximum voltage for 64 cm level). Similarly, the output voltage of the pressure sensor is compared with a reference voltage of 44 mV (maximum voltage for 4 bar pressure). If the level is greater than 64 cm and the pressure is less than 4 bar, the output of the comparator will be high, which will turn on the green LED.
Comparator 2: Turn on red LED if level < 20 cm.
For this, we can use another LM358 comparator circuit.
Here, the output voltage of the level sensor is compared with a reference voltage of 7.88 mV (minimum voltage for 20 cm level). If the level is less than 20 cm, the output of the comparator will be high, which will turn on the red LED.
Comparator 3: Turn on release valve if pressure > 11 bar.
For this, we can use an NPN transistor circuit.
Here, the output voltage of the pressure sensor is compared with a reference voltage of 121 mV (minimum voltage for 11 bar pressure). If the pressure is greater than 11 bar, the transistor will be turned on, which will trigger the release valve to open.
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