Initial velocity (u) = 10.8 m/s
Final velocity (v) = 3.7 m/s
Acceleration (a) = -2.67 m/s²
By using equation of motion, we get:
[tex] \bf \longrightarrow v = u + at \\ \\ \rm \longrightarrow 3.7 = 10.8 + ( - 2.67)t \\ \\ \rm \longrightarrow 10.8 - 2.67t = 3.7 \\ \\ \rm \longrightarrow (10.8 - 10.8) - 2.67t = 3.7 - 10.8 \\ \\ \rm \longrightarrow - 2.67t = - 7.1 \\ \\ \rm \longrightarrow \dfrac{ - 2.67}{ - 2.67} t = \dfrac{ - 7.1}{ - 2.67} \\ \\ \rm \longrightarrow t = 2.6 \: s[/tex]
[tex] \therefore [/tex] Time taken (t) = 2.6 s
Expresa, en unidades del Sistema Internacional, la siguiente cantidad: 5,6 · 103 cm2 Expresa el resultado en notación científica. Respuesta:Expresa, en unidades del Sistema Internacional, la siguiente cantidad: 5,6 · 103 cm2 Expresa el resultado en notación científica. Respuesta:
Answer:
La cantidad equivale a [tex]5,6\times 10^{-1}[/tex] metros cuadrados.
Explanation:
El Sistema Internacional de Pesos y Medidas utiliza el metro como unidad de longitud y, por extensión, el metro cuadrado como unidad de área. Si sabemos que un metro cuadrado equivale a 10000 centímetros cuadrados, entonces tenemos que su equivalente en unidades del Sistema Internacional en notación científica es:
[tex]x = 5,6\times 10^{3}\,cm^{2}\times \left(1\times 10^{-4}\,\frac{m^{2}}{cm^{2}}\right)[/tex]
[tex]x = 5,6\times 10^{-1}\,m^{2}[/tex]
La cantidad equivale a [tex]5,6\times 10^{-1}[/tex] metros cuadrados.
What are the vector scalar pairs?
Answer:
Explanation:
is there more to the problem?
The diagram shows a box in the periodic table. 14 Si Silicon 28.1 What is the atomic mass of the element shown? O A. 14 B. 56 o C. 281 D. 42.1
Answer:
28.1
Explanation:
The number 14 is it's atomic number, the Si is the atomic symbol, and 28.1 is the atomic mass.
Hope this helps!
Answer:
28.1
Explanation:
got it correct on my test.
what is one common product use microwaves
dont have much timeee
Answer:
Fluorescent Lights
Explanation:
Fluorescent light is one one common product use microwaves
How does microwaves workhe heat generated by the microwaves quickly and efficiently cooks or heats the food. Microwave ovens are known for their convenience and speed in preparing meals, as they can rapidly heat or cook food items. They are commonly used for tasks such as reheating leftovers, defrosting frozen food, or preparing quick meals.
It's worth noting that while microwaves are primarily used in microwave ovens, they also have various other applications in communication technology, radar systems, and scientific research.
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Science ck-12 green house effect
Answer:
what about it i need more info
Explanation:
A book with a mass of 8 kg is at rest on a horizontal surface of a table, as shown below.
The magnitude of the normal force acting on the book is -
A.8
B.40
C.80
D.100
Answer:
N = 80 N
Explanation:
Given that,
Mass of a book, m = 8 kg
We need to find the magnitude of the normal force acting on the book. Normal force acting on an object is balanced by its weight such that,
N = mg
g is the acceleration due to gravity
[tex]N=8\ kg\times 10\ m/s^2\\\\N=80\ N[/tex]
So, the correct option is (c) "80 N".
What is the similarities and differences of the particle motion in solid and liquid
Answer: Differences: Solids have particles that are tightly packed and they form a pattern. In this case, they move and vibrate in place. On the other hand, liquid particles are close together but they have an irregular arrangement. The spaces between the particles allow them to move freely.
Explanation:
Particles in solids are arranged in a pattern and are closely packed. In this instance, they remain stationary and vibrate. However, despite being close together, liquid particle arrangements are asymmetrical. The particles can travel freely because of the voids between them and the similarity is both solid and liquid has some shape, but gas does the random movement in the container.
What is Particle motion in Solid, Liquid and Gas?In solid the particles are tightly packed with each other, so there will be no such movement by the particles it means that there the particles have very less kinetic energy. Solids have definite shape and size, and they are incompressible in nature, and they are tough and rigid as well.
In liquid the particles are lightly packed with each other due to which there is some movement in the particles it means that the particles have some kinetic energy. The liquids are compressible in nature. They do not have a specific shape, but they can take the shape of a container where it is filled.
Liquids are fluid in nature.
In gases, there is so much of distance between particles due to which the particles do random movement, and they have high kinetic energy. They do not have any shape and size, but they are highly compressible as compared to solid and liquid. They also take the shape of the container where they filled.
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What would a Bohr model of sodium look like
Answer:
A Bohr model for sodium shows that it has eleven protons and neutrons inside the nucleus, with its eleven electrons orbiting in three energy levels.
Explanation:
Hope this helps
Should the practice of lining waterways with concrete continue?
Answer:
Yes, the practice of lining waterways with concrete should continue.
Explanation:
These concrete linings create more laminar flow along the waterways, and in turn, this can reduce erosion. When erosion is reduced, this prevents damage to homes and roads, and loss of land.The picture below shows Earth:
A. rotating
B. revolving
C. orbiting
D. stopping
The figure shows about the rotating earth.
To find the correct option among all the options, we need to know about the rotation state of earth.
What is rotation of earth?Motion of earth about its own axis is known about its rotation motion.
How does rotation motion different from orbital or revolving motion?In revolving and orbital motion, an object moves around an axis out side of that bulk of object in a certain orbit, while in rotational motion, the object moves around its own axis.
How is rotation motion represented?Rotation motion is represented by drawing an axis in the bulk of object and to indicate the rotation a circular arrow is drawn.
Thus, we can conclude that the figure shows about the rotating earth.
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what is force applied per unit area
Answer:
Pressure is defined as force per unit area. The standard unit for pressure is the Pascal, which is a Newton per square meter.
P= A/F
Answer:
force per unit area - the force applied to a unit area of surface; measured in pascals (SI unit) or in dynes (cgs unit); "the compressed gas exerts an increased pressure" pressure, pressure level.
Weight
A) exists independent of gravity
B) is the force of gravity upon an object
C) the same as mass
D) the force that keeps things on the surface of earth
Answer:
B) is the force of gravity upon an object
Explanation:
Weight is the force of gravity acting upon an object.
Weight is dependent upon the force of gravity acting on a bodyIt is mathematically expressed as;
Weight = mass x acceleration due to gravity
Mass is the amount of matter in a substance, it exists independently of gravity
A car travels 28.0 km on a road that is 16.5 degrees east of north. What are the horizontal and vertical components of its displacement?
Answer:
no se ve bien pana
Explanation:
A computational model predicts the maximum height that a roller coaster car can reach when the lowest height of its journey is at ground level, where it has a speed of 20 m/s. Given these conditions, what is the maximum height?(1 point)
196 m
4.8 m
20.4 m
2.0 m
Answer: 20.4 m
Explanation: [tex]\frac{9.8^{2} }{Velocity} = Max Height[/tex]
The answers to this test are:
1. What is the maximum speed when the conditions are mass = 450 kg, initial height = 30 m, and the roller coaster car is initially at rest?
24.2 m/s
2. A computational model predicts the maximum height that a roller coaster car can reach when the lowest height of its journey is at ground level, where it has a speed of 20 m/s. Given these conditions, what is the maximum height?
20.4 m
3. A computational model predicts the speed of a roller coaster car at different heights given its speed at the lowest height of its journey, which is at ground level. The speed at the lowest point is 30 m/s. What is the prediction for its speed when it is at a height of 20 m?
22.5 m/s
4. A computational model predicts the maximum potential energy a roller coaster car can have given its mass and its speed at the lowest point of its journey. Its mass is 350 kg, and it speed at a height of 0 m is 25 m/s. What is the prediction for its maximum potential energy?
109,375 J
5. What is the benefit of using simple computational models in a spreadsheet application, like the one used in this course, to predict mechanical energy and related values?
It is easy to calculate new scenarios.
why is area called scalar quantity
Answer:
area is called scalar quantity because there is no need of direction to define and also follow the algebric summation ..... is your answer
State the career function of building engineering
Answer:
Building engineers analyze reports, help to design structures, and manage contracts and budgets.
Explanation:
(ii) Describe how the acceleration of the train at time t = 100 s differs from the acceleration
at time t = 20 s.
Explanation:
Acceleration is the rate of change of velocity with time. When acceleration increases a body moves a faster velocity.
In the graph acceleration at time t= 100s is rapidly increasing. At t = 20s, the acceleration of the body is getting started up.A vehicle at time 100s will have a faster velocity compared to one at t = 20s
In a science fiction movie, when a spaceship explodes the vibrations destroy a nearby spaceship *
a)The script is fine as written
b)Rewrite the script since sound cannot travel in a vacuum
c)No one is actually in space to hear the sound
d)There is no energy in a sound wave so no explosion
Answer:
d
Explanation:
An object is fired with a velocity of 130 ft/s at 60 degrees above the horizontal. Analyze this motion, finding all of the following: Velocity components in both x and y, time, distance traveled, and maximum height reached. NEED ANSWER ASAP
What organs are part of the Digestive System?
Answer:
The alimentary tract of the digestive system is composed of the mouth, pharynx, esophagus, stomach, small and large intestines, rectum and anus. Associated with the alimentary tract are the following accessory organs: salivary glands, liver, gallbladder, and pancreas.
Throwing a ball with more force to increase acceleration is an example of which of Newton’s Laws?
Answer:
Its the 2nd law of motion
Explanation:
Because it talks about force and acceleration
Throwing a ball with more force to increase acceleration is an example of Newton’s 2nd law of motion.
What is Newton's second law of motion?The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.Newton’s second law states that the acceleration of an object depends upon two variables – the net force acting on the object and the mass of the object. The acceleration of the body is directly proportional to the net force acting on the body and inversely proportional to the mass of the body. This means that as the force acting upon an object is increased, the acceleration of the object is increased. Likewise, as the mass of an object is increased, the acceleration of the object is decreased.To learn more about Newton’s second law, refer to: https://brainly.com/question/19030143
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A 0.15 kg baseball and a 7.25 kg bowling ball are both rolling along at 3 m/s. which object is easier to stop and why?
A) the bowling ball because it has less inertia
B) the baseball because it has more inertia
C) the bowling ball because heavy objects are naturally prone to stop their own
D) the baseball because it has less inertia
What if the frequency is now increased to f = 69 Hz, and we want to keep the impedance unchanged? (A) What new resistance should we use to achieve this goal? R = Ω (B) What is the phase angle (in degrees) between the current and the voltage now? ϕ = ° (C) Find the maximum voltages across each element.
Complete Question
A series RLC circuit has R = 405 Ω, L = 1.40 H, C = 3 µF. It is connected to an AC source with f = 60.0 Hz and ΔVmax = 150 V. What if the frequency is now increased to f = 69 Hz, and we want to keep the impedance unchanged? (A) What new resistance should we use to achieve this goal? R = Ω (B) What is the phase angle (in degrees) between the current and the voltage now? ϕ = ° (C) Find the maximum voltages across each element.
Answer:
A
[tex]R = 513.9 \ \Omega[/tex]
B
[tex]\theta = 34.79^o[/tex]
C
[tex]V_c =212.96 \ V[/tex] , [tex]V_L = 168.139 \ V[/tex] , [tex]V_R = 142.35 \ V[/tex]
Explanation:
From the question we are told that
The resistance is [tex]R = 405 \ \Omega[/tex]
The inductance is L = 1.40 H
The capacitance is [tex]C = 3 \mu F = 3 *10^{-6} \ F[/tex]
The original frequency is [tex]f = 60 \ Hz[/tex]
The new frequency is [tex]f_1 = 69 \ Hz[/tex]
Generally the reactance of the inductor is mathematically represented as
[tex]X_L = 2 \pi * f * L[/tex]
=> [tex]X_L = 2 * 3.142 * 60 * 1.40[/tex]
=> [tex]X_L = 527.5 \ \Omega[/tex]
Generally the reactance of the capacitor is mathematically represented as
[tex]X_c = \frac{1}{2 \pi * f * C}[/tex]
[tex]X_c = \frac{1}{2 * 3.142 * 60 * 3*10^{-6}}[/tex]
=> [tex]X_c = 884.6 \ \Omega[/tex]
Generally the impedance of the circuit is mathematically represented as
[tex]Z = \sqrt{[X_L - X_c ]^2 + R^2}[/tex]
=> [tex]Z = \sqrt{[527.5 -884.6 ]^2 + 405^2}[/tex]
=> [tex]Z = 540 \ \Omega[/tex]
Generally when the frequency is changed , the reactance of the inductor becomes
[tex]X_L' = 2 * 3.142 * 69 * 1.4[/tex]
=> [tex]X_L' = 607 \ \Omega[/tex]
Generally when the frequency is changed , the reactance of the capacitor becomes
[tex]X_c' = \frac{1}{2 * 3.142 * 69 * 3*10^{-6}}[/tex]
=> [tex]X_c ' = 768.8 \ \Omega[/tex]
Generally the new resistance is mathematically represented as
[tex]R ^2 = Z^2 - ( X_c' - X_L')^2[/tex]
=> [tex]R ^2 = 540^2 - ( 603 - 768.8 )^2[/tex]
=> [tex]R = \sqrt{264110.4}[/tex]
=> [tex]R = 513.9 \ \Omega[/tex]
Generally the phase angle is mathematically represented as
[tex]\theta = tan^{-1}[\frac{[X_L - X_C]}{R} ][/tex]
=> [tex]\theta = tan^{-1}[\frac{[ 884.6 - 527.5]}{513.92} ][/tex]
=> [tex]\theta = 34.79^o[/tex]
Generally the maximum current flowing through the circuit is mathematically represented as
[tex]I_{max} = \frac{\Delta V}{ Z}[/tex]
=> [tex]I_{max} = \frac{150}{540 }[/tex]
=> [tex]I_{max} = 0.2778 \ A[/tex]
Generally the maximum voltage across the capacitor is
[tex]V_c = I_{max} * X_c'[/tex]
[tex]V_c = 0.2778* 768.8[/tex]
=> [tex]V_c =212.96 \ V[/tex]
Generally the maximum voltage across the inductor is
[tex]V_L = I_{max} * X_L[/tex]
[tex]V_L = 0.2778* 607[/tex]
=> [tex]V_L = 168.139 \ V[/tex]
Generally the maximum voltage across the resistor is
[tex]V_R = I_{max} * R[/tex]
[tex]V_R = 0.2778* 513.9[/tex]
=> [tex]V_R = 142.35 \ V[/tex]
help ASAP
A golf ball is sitting still on the grass three feet from the hole. Which statement describes the golf ball's motion? * The golf ball has a constant velocity. The golf ball is accelerating.
Answer:
The golf ball has a constant velocity
Explanation:
the region between the cell membrane and the nucleus is called the_________
Answer:
Answer is the cytoplasm
If a fish experiences an acceleration of 4.9 m/s over a period of 1.84 a , what was the change in velocity
Explanation:
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Radiometric dating is a form of relative dating.
Question 4 options:
True
False
Answer:
True
Radiometric dating is a process of identifying the age of a material based on known half-lives of decaying radioactive materials found in both organic and inorganic objects. Radiometric dating is often used to determine the age of rocks, bones, and ancient materials.
Answer:
false
Explanation:
what factors limit the accuracy of a potentiometer and what was the objective of reversing the terminals of the cell
Explanation:
"The accuracy of a potentiometer can be increased by decreasing the potential gradient across the potentiometer wire, and this can be achieved by increasing the length"
The factors that are affecting/limiting the accuracy of the potentiometer are:
The specific resistance of the material of the potentiometer wire.The potential gradientThe current passing through the potentiometer wire. Area of a cross-section of the wire Internal temperature.
The objective of reversing the terminals of the cell
If the jockey of the potentiometer is pressed for a long time, joule heating sets in, so that reversing the terminals of the potentiometer will prevent the resistance due to joule heat from being added to the measured resistance, ultimately preventing unwanted resistance
Which force keeps an object moving in a circle? centripetal force fluid friction inertia momentum
Answer:
Any object moving in a circle (or along a circular path) experiences a centripetal force. That is, there is some physical force pushing or pulling the object towards the center of the circle. This is the centripetal force requirement.
Explanation:
A 45 kg swimmer starting from rest can develop a maximum speed of 12 m/s over a distance of 20 m. How much net force must be applied to do this?
If a 45 kg swimmer starting from rest can develop a maximum speed of 12 m/s over a distance of 20 m , then the net force must be applied to this would be 162 Newtons .
What is work done?The total amount of energy transferred when a force is applied to move an object through some distance .
Work Done = Force × Displacement
As given in the problem a 45 kg swimmer starting from rest can develop a maximum speed of 12 m / s over a distance of 20 m.
The total work done = 0.5 × 45 × 12²
= 3240 Joules
3240 = Force × 20
Force applied on the crate = 3240 / 20
= 162 Newtons
Thus, the net force that must be applied to this would be 162 Newtons .
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