Answer:
6.25 m/s
Explanation:
Given parameters
Initial mark = 65
Final mark = 15
time taken = 8s
Unknown:
Velocity of the runner = ?
Solution:
Velocity is the displacement divided by time;
Velocity = [tex]\frac{displacement}{time}[/tex]
Displacement = Initial mark - final mark = 65 - 15 = 50m
Now, insert the parameters and solve;
Velocity = [tex]\frac{50}{8}[/tex] = 6.25m/s
the region between the cell membrane and the nucleus is called the_________
Answer:
Answer is the cytoplasm
Which strategies maximize recovery following an intense bout of resistance training?
(Select all that apply.)
replenishing low blood sugar with carbohydratesreplenishing low blood sugar with carbohydrates , ,
stretching muscle groups, holding each stretch for 30 seconds or morestretching muscle groups, holding each stretch for 30 seconds or more , ,
allowing muscle groups 8–12 hours of rest before training againallowing muscle groups 8–12 hours of rest before training again , ,
drinking 20–24 ounces of water for every pound of body mass lostdrinking 20–24 ounces of water for every pound of body mass lost , ,
Answer:
The answers are:
a) drinking 20–24 ounces of water for every pound of body mass lost,
b) stretching muscle groups, holding each stretch for 30 seconds or more, and
c) replenishing low blood sugar with carbohydrates
Explanation:
I just took the exam and got this correct.
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.
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:
(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:
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
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:
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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In a series circuit, an ammeter shows the current leaving the positive end of a cell is 0.5A. What current flows into the negative end of the cell?
Answer:
0.5A as in a series circuit the current is the same everywhere
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
A dog barks to alert his owner. What is the medium for the sound waves produced by the dog barking?
Answer:
The medium for the sound waves produced by the dog barking is the air
Explanation:
Sound waves are a form of mechanical waves such that it moves from one point to another by the vibration, back and forth of the medium particles from one layer to the next, thereby the particles of the medium remain in the same location and only the wave energy is propagated
The medium which has particles that vibrate back and forth in order to transmit the barking of the dog is the air.
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
DESPERATE WILL GIBE BRAINLIST AND THANKS
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 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
Can someone plz check if what I typed is good :)
An Earthquake has caused this, I know this because of the rubble. I know it's not a tornado or something similar because this building has collapsed, not blown away neither has it been lifted a few feet from where it used to be and the building next to it is damaged but still standing. Many earthquakes that are violent enough have the power to make buildings collapse, because of the vibration of the ground. Earthquakes are usually caused when rock underground suddenly breaks along a fault. So an earthquake is actually the result of sudden releases of high energy that take place from the crust of Earth. Since an earthquake leads to travelling waves of high intensity, such waves can easily give a jolt or shock to any building. So in conclusion I think an earthquake caused this in the picture because many earthquakes that are violent enough have the power to make buildings collapsed, because of the vibration of the ground.
Answer:
Explanation:
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.Electrons have a mass of about _____.
A. 2,000 times that of a neutron
B. 1/2,000 that of a proton
C. the same as a neutron
D. the same as a proton
Answer:
B. 1/2,000 that of a proton
Explanation:
the mass of an electron is 9.1093837015 × 10−31 kg, this in only 1/2,000 that of a proton.
Answer:
D. the same as a proton
Explanation:
um just trust me lol
Which statement best describes the importance of joints in the roadways of Bridges ?
a. Joints strengthen the roadway to support cars and trucks
b. Joints allow the roadway to expand and
contract with varying outside temperatures
c. Joints allow the roadway to expand and contract as cars put force on the bridge
d. Joints allow the bridge to be built in smaller, easier to assemble pieces.
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".
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
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 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]
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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Can you help me with this pls
Answer:
Can you help me with this pls
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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Science ck-12 green house effect
Answer:
what about it i need more info
Explanation:
What changes and challenges have you noticed in your relationship with your friends? Write a paragraph
explaining your answers.
Answer:
While in a relationship, friends can influence you to love your partner in different ways, sometimes because of how they also relate with their partners or what they say to you about your partner or the advice they give about and in your relationship.
Explanation:
SOMEONE PLEASE PLEASE HELP PLEASE PLEASE HLEP
What is the equation for work?
Work = force + distance
Work = force / distance
Work = force - distance
Work = force * distance
Answer:
I believe it's work=force*distance
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:
