Two wind turbines are set up with the following conditions: Turbine Ahas blades that are twice as long as the blades on Turbine B. The tips of the blades on Turbine A are moving twice as fast as the tips of the blades on Turbine B. Part D Which turbine takes the lesser amount of time to rotate through 1.0 radian of angular displacement? A. turbine A a turbine B They take the same amount of time. The answer cannot be determined from the information given. ; Subrnit Request Answer Part 5 29 As in Part D, two wind turbines with different length blades are rotating. Consider what needs to happen in order to change the angular speed of one of the turbines. If the turbine is to spin more quickly, should the angular acceleration, a be positive or negative?B. a should be positive.C. a should be negative. D. We cannot tell which direction a should be without knowing the direction of the angular velocity,
Answers
If a wind turbine with different length blades needs to spin more quickly, the angular acceleration should be positive. The correct answer is B
Part A: In the given scenario, Turbine A has blades twice as long as Turbine B, and the tips of the blades on Turbine A are moving twice as fast as the tips of the blades on Turbine B. Since the tips of the blades on Turbine A are moving faster, Turbine A takes the lesser amount of time to rotate through 1.0 radian of angular displacement. So, the correct answer is (a) Turbine A.
Part B: If a wind turbine with different length blades needs to spin more quickly, the angular acceleration should be positive. This is because a positive angular acceleration will increase the angular speed of the turbine, allowing it to rotate faster. So, the correct answer is (b) should be positive.
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Complete question:
Two wind turbines are set up with the following conditions: Turbine A has blades that are twice as long as the blades on Turbine B. The tips of the blades on Turbine A are moving twice as fast as the tips of the blades on Turbine B.
Part A. Which turbine takes the lesser amount of time to rotate through 1.0 radian of angular displacement?
a. turbine A
b. They take the same amount of time.
c. turbine B
d. The answer cannot be determined from the information given.
Part B. As in Part A, two wind turbines with different length blades are rotating. Consider what needs to happen in order to change the angular speed of one of the turbines. If the turbine is to spin more quickly, should the angular acceleration, be positive or negative?
a. should be negative
b. should be positive
c. We cannot tell which direction it should be without knowing the direction of the angular velocity
Related Questions
An object with a mass of 2.0 kg accelerates 2.0 m/s2when an unknown force is applied to it. What is the amount of the force?
Answers
Answer:
4 N
Explanation:
F = ma, Newton's second law. Multiply mass by acceleration.
How can the motion of two objects be described relative to each other
Answers
Answer:
Explanation:
The force on an object causes an a object to move
A 7 g bullet is fired at 119 m/s how much kinetic energy does it have? Round to the nearest whole
Answers
Remember
mass must be in kg.
RESULT,
49.5635J
This is not meant to be a long, mathematically-intensive problem. If you find yourself going down that road, you might want to rethink your approach.
Answers
Answer:
rethink your approach to what?
Explanation:
A 0.10kg mass is oscillating at a small angle from a light string with a period of 0.63s. What is the length of the pendulum?
Answers
Answer: 00.99m
Explanation:
because
Answer: 0.099
Explanation: Khan
A diffuse sound field is desired within a theater. The following room treatment would best
contribute to this acoustic characteristic:
(a) the back wall of the stage (behind the performers) is concave in shape
(b) a series of convex panels are suspended from the entire ceiling
(c) velvet curtains are hung on the side walls of the theater
(d) the back wall of the theater is finished with an acoustically reflective material
Answers
To create a diffuse sound field within a theater, the goal is to distribute sound energy evenly throughout the space, reducing the presence of distinct echoes and reflections.
Among the given options, the treatment that would best contribute to this acoustic characteristic is:
(c) Velvet curtains hung on the side walls of the theater.
Velvet curtains have a soft and textured surface that can absorb and scatter sound waves, preventing them from reflecting directly back into the audience or creating focused sound reflections. This helps to reduce the presence of strong reflections and echoes, promoting a more diffuse sound field within the theater.
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A wire is placed between the poles of a horseshoe magnet. There is a current in the wire in the direction shown, and this causes a force to act on the wire.
Answers
In this formula, g=GM/R^2 , what do G ,m and R stand for?
Answers
Answer:
Explanation:
g means gravitation
G is universal gravitational constant
M = mass of the earth
R = radius of the earth
Hope this helps
plz mark as brainliets!!!!!!!!!
above about what temperature does creep become an important failure mechanism for a metal?
Answers
Creep becomes a significant factor in the failure of metals at high temperatures, generally occurring above approximately 40% to 50% of the metal's melting temperature in Kelvin. The specific temperature range varies depending on the composition and type of metal.
Creep refers to the gradual deformation and elongation of a material over time when it is subjected to a constant load or stress at elevated temperatures. This deformation arises from the increased mobility of atoms within the metal at higher temperatures. As the temperature approaches the metal's melting point, the effect of creep becomes more pronounced due to the significantly enhanced atomic mobility.
It is important to acknowledge that the precise temperature at which creep becomes a crucial failure mechanism can differ for various metals and alloys. Furthermore, factors like applied stress, duration of time, and environmental conditions also impact the significance of creep as a failure mechanism.
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how to find resultant force?
Answers
Explanation:
To find the resultant force subtract the magnitude of the smaller force from the magnitude of the larger force. The direction of the resultant force is in the same direction as the larger force
please help!!! 50 POINTS
1) The diagram below models the energy involved in a reaction that changes methane gas and oxygen into carbon dioxide and water.
The graph shows a certain level of energy of reactants C H2 + 2 O2, which increases on the breaking of bonds as the atoms are separated. The energy is then consumed when the making of bonds decreases the energy of products, C O2 + 2 H2 O, to a level much lower than the energy of reactants. The energy change of negative delta H depicts the exothermic reaction.
Which observations about the energy released in making the bonds are correct?
a) It is greater than the energy absorbed in breaking the bonds. The excess is converted to chemical energy.
b) It is greater than the energy absorbed in breaking the bonds. The excess is converted to thermal energy.
c) It is less than the energy absorbed in breaking the bonds. The excess is converted to thermal energy.
d) It is less than the energy absorbed in breaking the bonds. The excess is converted to chemical energy.
2) Carbon dioxide is an example of a molecule where the component atoms of carbon and oxygen are held together by chemical bonds. Which statement correctly describes the reason for these chemical bonds?
a) The nuclei and electrons of the atoms are attracted to each other.
b) The strong nuclear energy bonds the atoms together.
c) The combination of chemical energy stored in each atom makes the bonds strong.
d) The structure of atoms increases their atomic energy, which creates the bonds.
3) When burning fuel for cooking, the pan and the food absorb energy and heat up. In this process, which form of energy is chemical energy converted into?(1 point)
a) thermal energy
b) atomic energy
c) mechanical energy
d) radiant energy
4) Which of the following statement/s about the energy involved in a chemical reaction is/are correct?
I. The energy stored in chemical bonds is kinetic energy.
II. The total energy is conserved during a chemical reaction.
III. Chemical energy can be converted to other forms of energy.
IV. Energy is needed to both break bonds and form new bonds.
a) III and IV only
b) II and III only
c) II, III, and IV only
d) I only
5) Burning coal results in several energy transformations to generate electricity. Which statement is correct about the chemical energy stored in chemical bonds between atoms when coal is burned?
a) It allows the bonds to form and then break.
b) It helps transform kinetic energy to potential energy.
c) It increases the number of atoms.
d) It converts to thermal energy.
thank you!!
Answers
Answer:
Explanation:
1. It is greater than the energy absorbed in breaking the bonds. The excess is converted to thermal energy.
2. The nuclei and electrons of the atoms are attracted to each other
3. thermal energy
4. II and III only
5. It converts to thermal energy.
Water flows through a tube with a diameter of 2m at a rate of 800kgs. What is the velocity of the water
Answers
The velocity of water flowing through the tube is approximately 0.2546 m/s.
The velocity of the water flowing through a tube with a diameter of 2m and a flow rate of 800kgs can be calculated using the formula V = Q/A, where V represents velocity, Q represents flow rate, and A represents the cross-sectional area of the tube. The cross-sectional area of the tube can be calculated using the formula A = πr^2, where r represents the radius of the tube.
Diameter of tube = 2 m, Flow rate = 800 kg/s, Density of water = 1000 kg/m³
First, find the area of the tube:
Area = π * (Diameter/2)²
Area = π * (2/2)² = π m²
Next, apply the formula:
Velocity = 800 kg/s / (π m² * 1000 kg/m³)
Velocity = 800 / (1000 * π) = 0.2546 m/s
The velocity of water flowing through the tube is approximately 0.2546 m/s.
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8. Give the net force for the following:
10 N
30 N
3N
3N
2N →
4N->
Js
SN
Answers
Answer:
i think it's is 30N
Explanation:
i got it right
Assume a simply supported beam with span of 15m. It will be exposed to a dead load of 20kN/m (including self-weight) and a live load of 2kN/m along the full span. At the same time, it will be experiencing a concentrated dead load of 23kN + a live load of 1kN at midspan, as well as an additional dead load of 15kN located at 4m from the right support.
The beam has a rectangular cross-section with a width of 600mm and total height of 1000mm. The beam is reinforced with 10- 25M tensions bars at effective depth of 920 mm. The maximum aggregate size used is 20mm, and has the following material properties: f’c = 25MPa ,fy = 400 MPa.
Please perform the following task:
1) Draw the governing shear and bending moment diagram for the factored load.
2) Calculate the moment resistance of the cross section.
3) Comment if this cross section is adequately designed to resist the factored bending moment. (LRFD)
Answers
The values of all sub-parts have been obtained.
(1). The maximum factored load the beam can withstand is 45.2 kN/m.
(2). The moment resistance of the cross-section is 291735.65 Nm.
(3). The factored moment demand is 27939.6 Nm
1) To draw the governing shear and bending moment diagram for the factored load, we need to first calculate the maximum factored load that the beam can withstand.
The maximum factored load on the beam is given by:
Dead Load = 20 kN/m + 15 kN
= 35 kN/m.
Live Load = 2 kN/m + 1 kN
= 3 kN/m.
Total Factored Load = 1.2 x Dead Load + 1.6 x Live Load
= 1.2 x 35 kN/m + 1.6 x 3 kN/m
= 45.2 kN/m.
The maximum factored load the beam can withstand is 45.2 kN/m.
The shear force and bending moment diagrams for the given factored load can be obtained as shown below:
Shear Force Diagram:
Bending Moment Diagram:
2) To calculate the moment resistance of the cross-section, we can use the formula:
MR = σst A'(d - a/2) + 0.85f'c A''(d - a/2)
Where, σst = yield stress of tension steel [σst = fy / γst],
γst = safety factor for tension steel [γst = 1.15A']
A' = area of tension steel, [A'' = b(d - a)].
Where,
b = width of the beam [b = 600 mm],
d = total height of the beam [d= 1000 mm],
a = effective depth of tension steel [a = 920 mm]
f'c = compressive strength of concrete [f'c = 25 MPa],
MR = σst A'(d - a/2) + 0.85f'c A''(d - a/2)
MR = (400 / 1.15) x 10 x (1000 - 920/2) + 0.85 x 25 x 590 x (1000 - 920/2)
MR = 291735.65 Nm
The moment resistance of the cross-section is 291735.65 Nm.
3) To check if this cross-section is adequately designed to resist the factored bending moment (LRFD), we need to calculate the factored moment demand and compare it with the moment resistance.
The factored moment demand is given by:
MF = ϕ x Mu
Where,ϕ = resistance factor = 0.9, Mu = factored bending moment
Mu = 1.2 x Dead Load x L2 / 8 + 1.6 x Live Load x L2 / 8 + 1.2 x (Dead Load + Live Load) x L2 / 2
= 1.2 x 35 x 152 / 8 + 1.6 x 3 x 152 / 8 + 1.2 x 38 x 152 / 2
= 31044 Nm
MF = ϕ x Mu
= 0.9 x 31044
= 27939.6 Nm
The factored moment demand is 27939.6 Nm, which is less than the moment resistance of the cross-section, i.e., 291735.65 Nm.
Therefore, this cross-section is adequately designed to resist the factored bending moment.
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PLEASE ONLY A B C OR D || During an experiment, your teacher gives you two objects: tissue paper and a balloon. You observe that the tissue paper repels the balloon. What does this most likely tell you about the charges of the two objects?
a.Both objects have negative charges.
b.The tissue has a positive charge, and the balloon has a negative charge.
c. The tissue has a negative charge, and the balloon has a positive charge.
d.The objects have no interactive with each other.
Answers
c. The tissue has a negative charge, and the balloon has a positive charge.
The balloon is repelled by the tissue paper, why?Due to the opposing charges of both things, the tissue paper repels the balloon. In this instance, it is likely that the balloon has a positive charge whereas the tissue paper has a negative charge. While like charges repel one another, opposite charges attract.
The balloon is repelled by the tissue paper, so what can we assume about the charges of the two items from this observation?The fact that the balloon is repelled by the tissue paper leads us to conclude that both items have opposing charges. The tissue paper has a negative charge, but the balloon is most likely to have a positive charge.
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What are the benefits and drawbacks of using renewable energy sources to generate electricity?
Answers
Answer:
benefits
Diversifying energy supply and reducing dependence on imported fuels.
Creating economic development and jobs in manufacturing, installation, and more.
drawbacks
Large areas of landfill are required
Hydroelectric power is generated from flowing water, which turns turbines and generates electricity
Explanation:
Which types of data should be modified to change the rate of rotation?
(1 point)
o the number of loops in the coil and the distance from the source of the current
o the number of loops in the coil and the electric current
the dimensions of coils and the distance from the source of the current
o the dimensions of the coils and the electric current
Answers
Answer:
the number of loops in the coil and the electric current.
Explanation:
Just took the test and got it correct.
using wien’s formula, what is the peak wavelength (λmax ) of the star naos with a temperature of 42,400k? λmax = (0.2897/t) x 107 (nm) a. 72nm b. 68nm c. 70nm d. 65nm
Answers
The peak wavelength (λmax ) of the star naos with a temperature of 42,400k is 68nm
We can use Wien's displacement law to calculate the peak wavelength (λmax) of a blackbody radiator at a given temperature:
λmax = b/T
where b is Wien's displacement constant, equal to 2.89777 x 10^-3 m K.
Converting the temperature of the star Naos to kelvin, we get:
T = 42,400 K
Substituting these values into the equation, we get:
λmax = (2.89777 x 10^-3 m K) / (42,400 K)
Simplifying this expression, we get:
λmax = 6.84 x 10^-8 m
Converting meters to nanometers, we get:
λmax = 684 nm
Therefore, the answer is (b) 68 nm.
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All of the following are sources of calories except HELP ASAP!!!
Answers
Answer:
vitamins don't contain calories
1. A 25.0 kΩ resistor is hooked up to a 50.0 V battery in a circuit with a switch.
a.) Draw a circuit diagram for the circuit described. Label all parts and values.
b.) What is the current flowing through the resistor?
c.) What is the power dissipated by the resistor?
2.A 10.0 Ω resistor is hooked up in series with an 8.0 Ω resistor followed by a 27.0 Ω resistor. The circuit is powered by a 12.0 V battery.
a.) Draw a labeled circuit diagram for the circuit described.
b.) Calculate the equivalent resistance.
c.) Calculate the voltage drop across each resistor in the circuit.
3.A 9.0 V battery is hooked up with three resistors (R1, R2, R3) in parallel with resistances of 2.0 Ω, 5.0 Ω, and 10.0 Ω, respectively.
a.) Draw a labeled circuit diagram for the circuit described.
b.) Calculate the equivalent resistance.
c.) Calculate the current passing through each resistor in the circuit.
Answers
R
=
15
k
ω
Voltage given to the circuit is
V
=
45
V
(a)
For the current in the circuit
I
=
V
R
I
=
45
15
×
10
3
I
=
3
×
10
−
3
A
Thus, the current that is flowing through the resistor is
3
×
10
−
3
A
(b)
Now for the power dissipated by the resistor:
P
=
V
×
I
P
=
45
×
3
×
10
−
3
P
=
135
×
10
−
3
W
Thus, the power dissipated by the circuit is
135
×
10
−
3
W
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```
+-------------------+
| |
---| Battery (50.0 V) |
| |
---|-------------------|---
| |
---| Resistor (25.0 kΩ) |
| |
---|-------------------|---
| |
| Switch |
| |
---|-------------------|---
| |
```
b.) To calculate the current flowing through the resistor, we can use Ohm's Law: I = V/R, where I is the current, V is the voltage, and R is the resistance. In this case, the voltage across the resistor is 50.0 V, and the resistance is 25.0 kΩ (which can be converted to 25000 Ω). Substituting these values, we get:
I = 50.0 V / 25000 Ω
I = 0.002 A or 2.0 mA
Therefore, the current flowing through the resistor is 2.0 mA.
c.) The power dissipated by the resistor can be calculated using the formula P = IV, where P is power, I is current, and V is voltage. Using the values we obtained earlier:
P = 0.002 A * 50.0 V
P = 0.1 W or 100 mW
Therefore, the power dissipated by the resistor is 0.1 W or 100 mW.
a.) Here's a labeled circuit diagram for the second scenario:
```
+------------------+
| |
---| Battery (12.0 V) |
| |
---|------------------|---
| |
---| Resistor (10.0 Ω) |
| |
---|------------------|---
| |
---| Resistor (8.0 Ω) |
| |
---|------------------|---
| |
---| Resistor (27.0 Ω) |
| |
---|------------------|---
| |
```
b.) To calculate the equivalent resistance for resistors in series, we simply add them:
R_eq = 10.0 Ω + 8.0 Ω + 27.0 Ω
R_eq = 45.0 Ω
Therefore, the equivalent resistance is 45.0 Ω.
c.) Since the resistors are in series and there is only one path for current, the voltage drop across each resistor will be the same as the battery voltage. Therefore, the voltage drop across each resistor is 12.0 V.
a.) Here's a labeled circuit diagram for the third scenario:
```
+------------------+
| |
---| Battery (9.0 V) |
| |
---|------------------|---
| |
---| Resistor (2.0 Ω) |
| |
---|------------------|---
| |
---| Resistor (5.0 Ω) |
| |
---|------------------|---
| |
---| Resistor (10.0 Ω) |
| |
---|------------------|---
| |
```
b.) To calculate the equivalent resistance for resistors in parallel, we use the formula:
1/R_eq = 1/R1 + 1/R2 + 1/R3
Substituting the values, we get:
1/R_eq = 1/2.0 Ω + 1/5.0 Ω + 1/10.0
Which of the following represents a possible magnitude for the force of static friction when Xavier applied 72.1 Newtons of force on the cart?
Answers
The possible magnitude for the force of static friction on the stationary cart is 72.1 N.
The given parameters:
Applied force on the cart, F = 72.1 NBased on Newton's second law of motion, the force applied to object is directly proportional to the product of mass and acceleration of the object.
F = ma
Static frictional force is the force resisting the motion of an object at rest.
\(\Sigma F = 0\\\\F -F_f = 0\)
where;
\(F_f\) is the frictional force
\(F= F_f \\\\72.1 = F_f\\\\F_f = 72.1\ N\)
Thus, the possible magnitude for the force of static friction on the stationary cart is 72.1 N.
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Hurry, please i will give crown
in a short-answer response, thoroughly describe what free-body diagrams are used for and what the free-body diagram is telling us about the directions of the forces. Make sure to include which direction the object will move and give an example of what that object could be. (examples: box, soccer ball, rope in a tug-of-war, etc.)
Answers
The free body diagram is the diagram that shows us the way that forces act on an object.
What is the Freebody diagram?The free body diagram is the diagram that shows us the way that forces act on an object. We know that force is the reason for the motion of an object. An object moves when it is acted upon by unbalanced forces. If the forces that are acting on the object are balanced the object would not move,
You know that force is a vector, thus the magnitude and the direction of the force is very important when we are trying to describe the action of a system of forces that acts on a body.
For instance, a book could sit still on a table because the book is acted upon by two forces that are balanced these are the weight of the book and the reaction force of the table on the book. These balanced forces makes the book to sit still on the table.
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What is the main difference between physical and chemical changes? ____ a. Chemical changes require a change in composition and physical does not b. Chemical changes do not require a change in composition but physical they do. c. Chemical changes are reversible d. None of the above
Answers
Answer:
a. Chemical changes require a change in composition and physical does not
Explanation:
The main difference between physical and chemical changes is that chemical changes require a change in composition and physical does not.
A chemical change is the change in composition of a substance which is irreversible and a permanent change.
On the other hand, physical change is a temporary change in a substance and can be easily reversible. The composition of a substance do not change in physical composition.
2. Think about an activity you may have learned that involves muscle memory. Consider when you first learned the activity, how easy or difficult it was the first time, and if you can do it now without thinking. What happened in your brain during practices that resulted in muscle memory for you?
Answers
Answer:
Muscle memory is found in many everyday activities that become automatic and improve with practice, such as riding bicycles, driving motor vehicles, playing ball sports, typing on keyboards, entering PINs, playing musical instruments, poker, martial arts, and dancing.
Explanation:
When a space shuttle was launched, the astronauts onboard experienced an acceleration of 29.0 m/s2. If one of the astronauts had a mass of 60.0 kg, what net force in newtons did the astronaut experience? answer choices
1740 N
2 N
.5 N
1000 N
Answers
The net force experienced by the astronaut can be calculated using the formula F = m × a, where F is the net force, m is the mass of the astronaut and a is the acceleration experienced during the launch, thus F = 1740 N.
According to Newton's second law of motion, the force acting on an object is equal to the product of its mass and acceleration. This means that the net force experienced by the astronaut can be calculated by multiplying the astronaut's mass by the acceleration experienced during the launch. In this case, the astronaut's mass is 60.0 kg and the acceleration experienced during the launch is 29.0 m/s².
F = m × a
F = (60.0 kg) × (29.0 m/s²)
F = 1740 N.
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how does shape of object affect friction
Answers
Answer:
There are three types of friction.
1. Slanting friction
2. Sliding friction
3. Rolling friction
In the first two types of friction, the body of the object will come in contact with the irregularities on the surface more than in the case of rolling friction, thus a heavy box in square shape will have more friction than a heavy-duty vehicle.
This is also the reason why all vehicles are having wheels as they reduce friction and makes transportation easier and many people suggest to use a small log of wood to be placed on the bottom of a heavy box with flat bottom so it can moved easily due to reduction of friction
Look at the diagram. The electricity supplier charges 14p per unit. How much did this electricity cost over the 24 hour period
Answers
Total units
31487-3146323unitsCost°
14(23)$322how are speed and distance similar?
Answers
Answer:
When an object moves in a straight line at a steady speed, we can calculate its speed if we know how far it travels and how long it takes. This equation shows the relationship between speed, distance traveled and time taken: Speed is distance divided by the time taken.
Explanation:
Thats what goog.le said so if its wrong blame G O O G L E
Abdul of mass 50 kg is standing in an elevator of his building. The elevator is moving
upwards and is slowing down at a rate of 2.0 m/s? What is Abdul's apparent weight?
Use g = 10 m/s
Answers
Answer:
Abdul has an apparent weight of 600 newtons.
Explanation:
The statement is incorrectly written. Its correct form is:
Abdul of mass 50 kg is standing in an elevator of his building. The elevator is moving upwards and is slowing down at a rate of 2.0 m/s2. What is Abdul's apparent weight? Use g = 10 m/s2.
According to the statement, we know that elevator and Abdul himself are moving upwards and decelerating, which means that Abdul feels a force from elevator is the same direction of his weight. From 2nd Newton's Law we find the following equation of equilibrium:
\(\Sigma F = F-m\cdot g = m\cdot a\) (1)
Where:
\(F\) - Apparent weight, measured in newtons.
\(m\) - Mass of Abdul, measured in kilograms.
\(g\) - Gravitational acceleration, measured in meters per square second.
\(a\) - Net acceleration of the elevator-Abdul system, measured in meters per square second.
In (1) we clear the apparent weight:
\(F = m \cdot (a+g)\)
If we know that \(m = 50\,kg\), \(a = 2\,\frac{m}{s^{2}}\) and \(g = 10\,\frac{m}{s^{2}}\), we find that the apparent weight of Abdul is:
\(F = (50\,kg)\cdot \left(2\,\frac{m}{s^{2}}+10\,\frac{m}{s^{2}} \right)\)
\(F = 600\,N\)
Abdul has an apparent weight of 600 newtons.
A Six Flags students notice that all of the roller coasters use motors to pull the cars to their highest point at the first hill, and then release the cars down the hill and for the rest of the trip. Why must the first hill of a rollercoaster ride be the highest? Answer with a claim, evidence and reasoning.
Answers
According to the conservation of energy
\(Total\text{ energy = Potential energy +Kinetic energy}\)At the top of the hill, only the potential energy will work as it is at rest.
Also, potential energy increases with height, so if the height of the first hill is the highest, the total energy will be more.