Answers
Relative to the movement of the building, a mass damper on the roof of an earthquake resistant building move in the opposite direction. The correct option is C.
What is mass damper?Mass dampers absorbs the kinetic energy of the waves, converting them into the heat energy. This heat energy is dissipated to the hydraulic fluid.
The mass dampers used on roof of the buildings are called as the tuned mass dampers. They are also known as seismic dampers. When seismic wave strikes the building, it vibrates and sways. The kinetic energy of theses waves are absorbed by movement of the mass damper. The kinetic energy is converted to the heat energy which in turn is transmitted to the fluid.
Relative to the movement of the building, a mass damper on the roof of an earthquake resistant building move in the opposite direction.
Thus, the correct option is C.
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Related Questions
A capacitor that uses 0. 40- mmmm -thick paper as a dielectric is charged to the maximum sustainable voltage. What is the strength of the induced electric field?
Answers
The maxiumum strength of the induced electric field in the capacitor that uses thick paper as dielectric material is 16 x 10⁶ V/m.
What is maximum electric field strength?
The maximum electric field strength above which an insulating material begins to break down and conduct is called its dielectric strength.
The dielelectric strength of paper is given as;
E = 16 MV/m = 16 x 10⁶ V/m
Thus, the maxiumum strength of the induced electric field in the capacitor that uses thick paper as dielectric material is 16 x 10⁶ V/m.
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3. A shuffleboard player applies a horizontal force of 10.0 N to the shuffleboard puck (400 g). If the puck accelerates at 24.5 m/s/s as the player continues to push it, what is the frictional force on the puck?
Answers
Answer:
Friction = 2 N
Explanation:
F = ma
= .4 * 24.5 = 9.8 N net force 10 N by stick means Ffriction = 2 N
The frictional force acting on the shuffleboard puck is 6.08 N.
What is meant by frictional force ?Frictional force is defined as the resistive force that prevents the relative motion between two surfaces that are in contact with each other.
Here,
Horizontal force applied on the shuffleboard puck, F = 10 N
Mass of the shuffleboard puck, m = 400 g = 0.4 kg
Acceleration of the shuffleboard puck, a = 24.5 m/s²
According to Newton's third law,
F - f = ma
where f is the frictional force acting on the shuffleboard puck.
So, the frictional force,
f = F - ma
f = 10 - (0.4 x 9.8)
f = 10 - 3.92
f = 6.08 N
Hence,
The frictional force acting on the shuffleboard puck is 6.08 N.
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Which equation is valid in the x axis for any projectile?
Answers
Answer:
Vx = u*cos θ
Explanation:
where ,
θ = angle of projection with X - axis(horizontal)
u = initial velocity of projectile
Vx = velocity of projectile with respect to x-axis
if a body is moving with constant linear positive acceleration
a) It moves with constant velocity
b) It remains at rest.
c) It decreases its velocity at constant rate.
d) It increases its velocity.
Answers
Answer:
D
Explanation:
It says constant positive linear acceleration, which means that the velocity increases at a constant rate.
Can someone please answer this, ill give you brainliest Would be very appreciated.
Answers
Answer:
Fuel switching
Explanation:
Adaptation
It denotes to be changed according to the change happening in surroundingsIt also denotes not to run away from danger rather than adapting to live with the fear.We know fuel will be finished one day so we are shifting to new fuel sources.
Click on the ray diagram that shows the proper positioning of an image formed by a concave lens.
Answers
I don't think so
Answer:
h
Explanation:
beautiful answer
In an internal combustion engine, heat flow into a gas causes it to
.
Answers
Answer:
Along path BC of the Otto cycle, heat transfer Qh into the gas occurs at constant volume, causing a further increase in pressure and temperature. This process corresponds to burning fuel in an internal combustion engine, and takes place so rapidly that the volume is nearly constant.
Why is red the last color seen at sunset?
A. It is bent by raindrops.
B. It is bent the most by the air.
C. It is scattered the least by the air.
D. It reflects off the atmosphere.
Answers
Answer: Within the visible range of light, red light waves are scattered the least by atmospheric gas molecules. So at sunrise and sunset, when the sunlight travels a long path through the atmosphere to reach our eyes, the blue light has been mostly removed, leaving mostly red and yellow light remaining.
Explanation:
Can someone please answer this, ill give you brainliest Would be very appreciated.
Answers
Answer:
Option 3
Explanation:
As the roots of the plant hold soil in place, it helps prevent soil erosion.
The other options are true, but they are not correct explanations as to why plants help prevent erosion.
The mass number of an isotope of uranium is 238, and its atomic number is 92. which symbol best represents this isotope of uranium? subscript 92 upper u. superscript 238 subscript 92 upper u. superscript 92 subscript 238 upper u. superscript 92 upper u.
Answers
The symbol that represents the isotope that has a mass number of 238, and an atomic number of 92 is 238 subscript 92 upper u.
What is an isotope?Isotopes are any of two or more forms of an element where the atoms have the same number of protons, but a different number of neutrons within their nuclei.
This means that isotopes possess different mass numbers but the same atomic number.
According to this question, the mass number of an isotope of uranium is 238, and its atomic number is 92. This means that the symbol of this isotope is as follows: 238/92 U.
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Answer:
B. [tex]\frac{238}{92}[/tex] U
Explanation:
edge 2022
Suppose that you had an electrically charged stick. If you divided the stick in half, each half would have half the original charge. If you split each of these halves, each piece would have a quarter of the original charge. Can you keep on dividing the charge in this manner forever
Answers
Because charge is quantized, the answer is no.
what is the kinetic energy of a 500 kg car moving at 18 m/s?
Answers
Answer:
81000 j
Explanation:
KE = 1/2 m v^2 = 1/2 500 18^2 =
If Weight=mg and Force=ma, and the only force acting on an object is gravity, then the masses cancel each other out and you are left with g=a. Therefore, that must mean everything on earth must fall at the same rate. Is this true Why or why not?
Answers
The correct answer to question:
Explanation:
When g=a, that means everything on earth fall at the same rate.
Why does everything fall to the earth at the same rate?As such, all objects free fall at the same rate regardless of their mass. Because the 9.8 N/kg gravitational field at Earth's surface causes a 9.8 m/s/s acceleration of any object placed there, we often call this ratio the acceleration of gravity.
Why is gravity equal to acceleration?When objects fall to the ground, gravity causes them to accelerate. Acceleration is a change in velocity, and velocity, in turn, is a measure of the speed and direction of motion. Gravity causes an object to fall toward the ground at a faster and faster velocity the longer the object falls.
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Forces (select all that apply) *
1:make objects move
2:have the unit of Newtons (N)
3:can be positive or negative in value
4:can go in any direction (North South East West)
Answers
Explanation:
1, 2,3, and 4 is correct.
Forces is a push or pull on an object. It can move an object.
Forces have a unit of Newton's
Force is a vector so it has direction meaning it can positive or negative, or north, South, East west
6. Which point on the skate park has the highest potential energy?
7. Which point on the skate park has the highest kinetic energy?
8. Where would the skater's speed be the fastest?
9. Where would the skater's speed be the lowest?
10. What you increasing the friction of the surface do to the skater's speed?
Answers
Answer:
6) Point G as it is the steepest.
7) Point G and F.
8) Between D and F.
9) Between C and D.
10) The skater will go slower with more friction and faster with less.
Explanation:
What is Sun flare ?
Investigation about Sun flare from NASA
Answers
Answer:
An powerful concentrated outburst of electromagnetic radiation in the Sun's atmosphere is known as a Sun flare. They are common in active regions, and they are typically accompanied by coronal mass ejections, solar particle events, and other solar phenomena.
What is the initial velocity of the object represented by
the graph?
m/s
Velocity vs Time
1
2.
3
4
ch
5
Time (s)
Answers
Answer:
at t=0 , V = 5 so it's 5 m/s
Explanation:
it is 5. 5 is the answer.
The strength of the force of friction depends on which two factors?
O A. The objects' sizes and weights
O B. How hard the surfaces push together and the size of the object
C. How hard the surfaces push together and the types of surfaces
involved
о
D. The heat generated by the friction and the types of surfaces
involved
Answers
Options A and D are correct. The strength of the force of friction depends on the objects' sizes and weights and the heat generated by the friction and the types of surfaces involved.
What is the friction force?It is a type of opposition force acting on the surface of the body that tries to oppose the motion of the body. its unit is Newton (N).
Mathematically, it is defined as the product of the coefficient of friction and normal reaction.
On resolving the given force and acceleration in the different components and balancing the equation gets. Components in the x-direction.
The strength of the force of friction depends on the two factors, as;
A. The objects' sizes and weights.
D. The heat generated by the friction and the types of surfaces involved.
Hence, options A and D are correct.
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As people age, they become unable to control their cardiorespiratory fitness levels.
Answers
Answer:
False
Explanation:
I need severe help
a cat ran west for 30 meters and it took them 5 seconds, what was the average speed of the cat? Don’t forget units!
Answers
Time= 5 seconds
Average speed= distance/time
30m/5sec= 6m/s
Jonathan and Cody’s older brother Josh, who is pictured in the Figure below, is standing at the top of a half-pipe at Newton’s Skate Park. Gravity is exerting a downward force on the skateboard as seen in the picture. Why doesn’t it tip over the edge and start rolling down the side of the half-pipe?
Answers
Mass(9.8) will give you the force needed to move the skateboard originally
In order to begin moving a Mass (Accelaration) will solve for the force required to move the skateboard. Mass(9.8) will give you the force needed to move the skateboard originally
What is acceleration ?Acceleration can be defined as the rate of change of velocity with respect to time, is a vector quantity associated with both magnitude and direction.
Acceleration can be up two types such as Uniform and Non-uniform acceleration, in a circle where speed remains constant but the direction is changing followed by velocity changes, and the body is said to be accelerated.
The average acceleration can be defined as the total change in velocity in the given interval period of time means the total time taken for the change. For a given interval of time, it is represented as ā.
Instantaneous acceleration can be defined as the ratio of change in velocity in a given time interval such that the time interval goes to zero.
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A flat, square surface with side length 4.35 cm is in the xy-plane at z=0.
Calculate the magnitude of the flux through this surface produced by a magnetic field
B⃗ = (0.200T)i^ + (0.250T)j^ + (0.550T)k^ .
The textbook isn't being helpful, I'll appreciate a good explanation!
Answers
Answer:
I X j = k (perpendicular to plane)
j X k = 0
i X k = 0 cross products for vectors i, j, k
Flux = B dot A and only B in the k direction is relevant
Flux = .550 T * .0435^2 m^2 = .00104 Webers-m^2
The magnitude of the flux through the given surface produced by the magnetic field B is 10.73 T cm².
What is magnetic flux?Magnetic flux is a measure of the amount of magnetic field passing through a given surface. It is defined as the product of the magnetic field B and the area A that it passes through, multiplied by the cosine of the angle between the magnetic field and the surface normal:
Φ = B ⋅ A ⋅ cos(θ)
Where Φ = is the magnetic flux,
B = is the magnetic field,
A = is the area of the surface,
θ = is the angle between the magnetic field and the surface normal.
In other words, magnetic flux is a measure of how much magnetic field passes through a surface, taking into account both the strength of the magnetic field and the orientation of the surface with respect to the field.
Magnetic flux is an important concept in electromagnetism and is used to describe the behavior of magnetic fields in a variety of applications, including generators, motors, and transformers. It is also used in the study of magnetism in materials, such as ferromagnetic materials, where the flux density is an important property.
Here in the question,
To calculate the flux through the given surface produced by the magnetic field B, we can use the formula:
Φ = ∫∫ B · dA
Where Φ = is the magnetic flux,
B = is the magnetic field,
dA = is an infinitesimal area vector pointing outward from the surface.
Since the surface is a flat square in the xy-plane, its normal vector is the unit vector k^. Therefore, the outward-pointing area vector dA can be expressed as:
dA = dx dy k^
Where dx and dy = are infinitesimal elements of length in the x and y directions, respectively.
Integrating over the surface, we have:
Φ = ∫∫ B · dA
= ∫∫ (0.200T i^ + 0.250T j^ + 0.550T k^) · (dx dy k^)
= ∫∫ 0.550T dx dy
= 0.550T ∫∫ dx dy
= 0.550T (4.35 cm)²
Φ = 10.73 T cm²
Therefore, the magnitude of the flux through the given surface produced by the magnetic field B is 10.73 T cm².
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A bullet of mass 50 g is fired from below into a suspended object of mass 450 g. The object rises through a height of 1.8 m with bullet remaining inside the object. Find the speed of the bullet. Take g = 10 ms².
Answers
Hello!
We can begin by using the Work-Energy theorem. The initial energy is the kinetic energy of the combined mass of the bullet and suspended object, while the final energy is the GPE of the combined objects.
In equations:
[tex]E_i = \frac{1}{2}mv^2\\\\E_f = mgh[/tex]
m = combined mass of the bullet and suspended object (0.5 kg)
v = velocity of block system after struck (? m/s)
g = acceleration due to gravity (10 m/s²)
h = final height of combined objects (1.8 m)
Set the two equal (Conservation of Energy) and solve for velocity.[tex]\frac{1}{2}mv^2 = mgh \\\\\frac{1}{2}v^2 = gh \\\\v^2 = 2gh \\\\v = \sqrt{2gh}\\\\v = \sqrt{2(10)(1.8)} = 6 \frac{m}{s}[/tex]
Now, we can use the conservation of linear momentum to solve.
Recall that:
[tex]p_i = p_f[/tex]
For an inelastic collision (objects stick together):
[tex]m_1v_1 + m_2v_2 = (m_1 + m_2) v_f[/tex]
Let m1 represent the bullet and m2 represent the suspended object.
Initially, the suspended object has no velocity, so v2 = 0. Therefore:
[tex]m_1v_1 = (m_1 + m_2)v_f\\\\v_1 = \frac{(m_1 +m_2)v_f}{m_1}\\\\v_1 = \frac{(0.5)(6)}{0.05} = \boxed{60 \frac{m}{s}}[/tex]
What needs to be done to balance this equation?
Question 4 options:
Do nothing (equation is balanced).
Change O 2 to O 4 on the left side of the equation.
Add coefficient 2 to O 2 on the left side of the equation.
Remove coefficient 2 in front of H 2O on the right side of the equation.
Answers
Answer:
Add the coefficient 2 to O2 on the left side of the equation. (O2 represents a molecule of oxygen gas)
The equation shows an equal number of H atoms and C atoms on either side, but the number of O atoms must also balance.
What is happening to the potential energy as the ice is melting
Answers
When ice is melting, there is a change in the energies in it. Its potential energy increases, but the thermal kinetic energy or temperature remains constant.
What is Melting?Melting is the process when a solid or liquid changes its state. Melting requires latent heat to convert its phase from solid to liquid or liquid to vapor.
Therefore, when ice is melting, Its potential energy increases.
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What could Alex do to make the reaction happen faster than normal?
Answers
Answer:
Chris lives farther from the school than Alex lives, and Chris walked to school at a faster rate than Alex walked.
Explanation:
A ringing bell is located in a chamber. when the air is removed from the chamber, why can the bell be seen vibrating but not be heard?
Answers
Answer:
sound requires a medium to be propagated
Explanation:
sound is a mechanical wave and thus requires a medium to be propagated. Air this case is a medium of travel for the ringing bell in the chamber that is why sound can be heard. When air in the chamber it becomes a vacuum that is why sound is not heard
Hello please answer this I need it right now
Nonsense:report
Right answer:brainliest
Answers
Answer:
do you have an answer key
Explanation:
How long does it take jupiter to rotate on its axis.
Answers
Answer:
10 hours
Explanation:
Homes with multiple bathrooms have outlets connected in series with a red reset button in the system
Answers
Homes with multiple bathrooms have outlets connected in series with a red reset button in the system. The reason for this circuit design is to prevent electrocution.
What is red reset button?The water heater's reset switch provided on the upper thermostat of an electric water heater. If the button is on, the switch would have tripped and the reset is required.
To prevent any kind of injury or killing of a person by electric shock is called as the electrocution. This can be prevented only by outlets connected in series with a red reset button.
Thus, the reason for this circuit design is to prevent electrocution.
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