Climate change has significant impacts on various aspects of our planet, including the environment, ecosystems, economies, and human well-being.
Increasing global temperatures lead to more frequent and intense heat waves, the melting of polar ice caps and glaciers, and changes in weather patterns. Reducing greenhouse gas emissions through transitioning to clean and renewable energy sources and implementing energy efficiency measures in buildings, transportation, and industries is a good action plan.
As temperatures rise, glaciers and ice caps melt, resulting in the rise of sea levels. This poses risks to coastal communities, infrastructure, and ecosystems. Action plans may involve the development of coastal protection measures, such as building sea walls or restoring natural buffers like mangroves and wetlands.
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heat energy could be converted into which other types of energy select all that apply
Heat energy can be converted into mechanical energy, electrical energy etc. but mainly it is converted and used as mechanical energy.
Heat energy is produced by combustion of some material, rubbing between hands or some substance. As we know from the reference of conservation of energy, energy can neither be created nor destroyed. So, heat energy can only be transferred from one form to another. Heat energy can be converted into mechanical energy, electrical energy etc. but mainly it is converted and used as mechanical energy. Like, in electricity producing industries, heat energy is required to boil the water to produce the steam to rotate the turbine. Here, heat is required to produce electricity by changing into mechanical energy. Hence, mainly heat energy converted into mechanical energy, electrical energy.
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Consider a three-dimensional harmonic oscillator, whose state vector ) is: |) = |az)|a₂) |az) where lar), lay) and laz) are quasi-classical states (cf. Complement Gy) for one- dimensional harmonic oscillators moving along Ox, Oy and Oz, respectively. Let L = Rx P be the orbital angular momentum of the three-dimensional oscillator. a. Prove: (L₂) = iħ (aza-aαv) AL₂ = √/la1² + |a₂|² and the analogous expressions for the components of L along Or and Oy. b. We now assume that: {Lz) = (Ly) =0, (L₂) = Ali> 0 Show that a must be zero. We then fix the value of A. Show that, in order to minimize ALT + ALy, we must choose: ag = -iαy = eivo V₂ (where po is an arbitrary real number). Do the expressions AL.AL, and (AL)²+ (AL)2 in this case have minimum values compatible with the inequalities obtained in question b. of the preceding exercise? c. Show that the state of a system for which the preceding conditions are satisfied is necessarily of the form: |v) = cx (ar) |xnr=k, n₁=0, n₂=0) k with: (a + iat) k |Xn,=k, n=0,1 ,n₁=0, n₂ =0) |4n₂=0, n₁=0, n₂ =0) √2kk! ak Ck (α) e-la/²/2 = √k! ; ar = ¹0 √ (the results of Complement Gy and of § 4 of Complement Dyi can be used). Show that the angular dependence of Xn, k, n=0, n.-0) is (sin ei)k. L2 is measured on a system in the state ). Show that the probabilities of the various possible results are given by a Poisson distribution. What results can be obtained in a measurement of Lz that follows a measurement of L2 whose result was 1(1+1)ħ²? =
This is a multi-part question involving a three-dimensional harmonic oscillator and its angular momentum.
a. The orbital angular momentum operator `L` can be written in terms of the position and momentum operators as `L = r x p`. The squared magnitude of the angular momentum is given by `L^2 = Lx^2 + Ly^2 + Lz^2`. The `z` component of the angular momentum can be written as `Lz = xp_y - yp_x`, where `p_x` and `p_y` are the momentum operators along the `x` and `y` directions, respectively.
Since the state vector `|ψ⟩` is given as a product of quasi-classical states for one-dimensional harmonic oscillators along each axis, we can use the ladder operator formalism to evaluate the action of `Lz` on `|ψ⟩`. The ladder operators for a one-dimensional harmonic oscillator are defined as `a = (x + ip) / √2` and `a† = (x - ip) / √2`, where `x` and `p` are the position and momentum operators, respectively.
Using these definitions, we can write the position and momentum operators in terms of the ladder operators as `x = (a + a†) / √2` and `p = (a - a†) / i√2`. Substituting these expressions into the definition of `Lz`, we get:
`Lz = (xp_y - yp_x) = ((a_x + a_x†) / √2)((a_y - a_y†) / i√2) - ((a_y + a_y†) / √2)((a_x - a_x†) / i√2)`
` = (1/2i)(a_xa_y† - a_x†a_y - a_ya_x† + a_y†a_x)`
` = iħ(a_xa_y† - a_x†a_y)`
where we have used the commutation relation `[a, a†] = 1`.
The action of this operator on the state vector `|ψ⟩` is given by:
`(Lz)|ψ⟩ = iħ(a_xa_y† - a_x†a_y)|αx⟩|αy⟩|αz⟩`
`= iħ(αxa_y† - αya_x†)|αx⟩|αy⟩|αz⟩`
`= iħ(αx - αy)Lz|αx⟩|αy⟩|αz⟩`
where we have used the fact that the ladder operators act on quasi-classical states as `a|α⟩ = α|α⟩` and `a†|α⟩ = d/dα|α⟩`.
Since `(Lz)|ψ⟩ = iħ(αx - αy)Lz|ψ⟩`, it follows that `(Lz)^2|ψ⟩ = ħ^2(αx - αy)^2(Lz)^2|ψ⟩`. Therefore, we have:
`(L^2)|ψ⟩ = (Lx^2 + Ly^2 + Lz^2)|ψ⟩`
`= ħ^2(αx^2 + αy^2 + (αx - αy)^2)(L^2)|ψ⟩`
`= ħ^2(αx^2 + αy^2 + αx^2 - 2αxαy + αy^2)(L^2)|ψ⟩`
`= ħ^2(3αx^2 + 3αy^2 - 4αxαy)(L^2)|ψ⟩`
This shows that `(L^2)|ψ⟩` is proportional to `(L^2)|ψ⟩`, which means that `(L^2)` is an eigenvalue of the operator `(L^2)` with eigenstate `|ψ⟩`. The eigenvalue is given by `(L^2) = ħ^2(3αx^2 + 3αy^2 - 4αxαy)`.
b. If we assume that `(Lz)|ψ⟩ = (Ly)|ψ> = 0`, then from part (a) above it follows that `(Ly)^2|ψ> = ħ^2(3ay^3-4axay+3az²)(Ly)^²|ψ>` and `(Lz)^2|ψ> = ħ^2(3az^3-4axaz+3ay²)(Lz)^²|ψ>`. Since `(Ly)^2|ψ> = (Lz)^2|ψ> = 0`, it follows that `3ay^3-4axay+3az² = 0` and `3az^3-4axaz+3ay² = 0`. Solving these equations simultaneously, we find that `ax = ay = az = 0`.
If we fix the value of `(L^2)`, then from part (a) above it follows that `(L^2) = ħ^2(3αx^2 + 3αy^2 - 4αxαy)`. Since `ax = ay = az = 0`, this equation reduces to `(L^2) = 0`.
To minimize `(Lx)^2 + (Ly)^2`, we must choose `αx` and `αy` such that the expression `3αx^2 + 3αy^2 - 4αxαy` is minimized. This can be achieved by setting `αx = -iαy`, where `αy` is an arbitrary complex number. In this case, the expression becomes `3αx^2 + 3αy^2 - 4αxαy = 6|αy|^2`, which has a minimum value of `0` when `αy = 0`.
c. If the conditions in part (b) are satisfied, then the state vector `|ψ⟩` can be written as a linear combination of eigenstates of the operator `(Lz)^2`. These eigenstates are of the form `|n⟩|m⟩|k⟩`, where `n`, `m`, and `k` are non-negative integers and `|n⟩`, `|m⟩`, and `|k⟩` are eigenstates of the number operator for the one-dimensional harmonic oscillator along each axis.
The action of the ladder operators on these states is given by:
`a_x|n⟩|m⟩|k⟩ = √n|n-1⟩|m⟩|k⟩`
`a_x†|n⟩|m⟩|k⟩ = √(n+1)|n+1⟩|m⟩|k⟩`
`a_y|n⟩|m⟩|k⟩ = √m|n⟩|m-1⟩|k⟩`
`a_y†|n⟩|m⟩|k⟩ = √(m+1)|n⟩|m+1⟩|k⟩`
`a_z|n⟩|m⟩|k⟩ = √k|n⟩|m⟩|k-1⟩`
`a_z†|n⟩|m⟩|k⟩ = √(k+1)|n⟩|m⟩|k+1⟩`
Since we have assumed that `(Lz)|ψ> = (Ly)|ψ> = 0`, it follows that:
`(Lz)|ψ> = iħ(a_xa_y† - a_x†a_y)|ψ> = iħ(∑_n,m,k c_nmk(a_xa_y† - a_x†a_y)|n>|m>|k>)`
`= iħ(∑_n,m,k c_nmk(√n√(m+1)|n-1>|m+1>|k> - √(n+1)√m |n+1>|m-1>|k>))`
`= iħ(∑_n,m,k (c_(n+1)(m+1)k√(n+1)√(m+1) - c_n(m-1)k√n√m)|n>|m>|k>)`
`= 0`
This implies that for all values of `n`, `m`, and `k`, we must have:
`c_(n+1)(m+1)k√(n+1)√(m+1) - c_n(m-1)k√n√m = 0`
Similarly, since `(Ly)|ψ> = 0`, it follows that:
`(Ly)|ψ> = iħ(a_xa_z† - a_x†a_z)|ψ> = iħ(∑_n,m,k c_nmk(a_xa_z† - a_x†a_z)|n>|m>|k>)`
`= iħ(∑_n,m,k c_nmk(√n√(k+1)|n-1>|m>|k+1> - √(n+1)
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When an object slides,there is less friction than when it rolls
Answer:
False
Explanation:
Rolling friction takes place when an object rolls on the surface. Sliding friction takes place when two surfaces are rubbed against each other. Rolling friction is much less than sliding friction for same pair of bodies. When one body rolls upon another, there is theoretically no sliding or slip between them.
Mark is conducting an experiment to show how an object’s kinetic energy is affected by its mass and velocity. First, he lets an empty wagon roll down a hill and calculates its kinetic energy. Next, he repeats the experiment after placing a bag of sand in the wagon. Which is the best prediction for the second part of his experiment?(1 point)
1. The wagon will have less velocity than when it was empty.
2. The wagon will have the same amount of kinetic energy as when it was empty.
3. The wagon will have less kinetic energy than when it was empty.
4. The wagon will have more kinetic energy than when it was empty.
Answer:
the wagon will have more kinetic energy than when it was empty
Explanation:
I need help with my physics homework
A ball starts from rest at the top of an inclined plane and rolls without slipping down the plane. The ratio of the angular velocity of the ball at the end of the plane to its angular velocity as it passes the center point C of the plane equals
The ratio of angular velocity of the ball at end of the plane to its angular velocity (passing the center point C of the inclined plane) will be equivalent to "sqrt (5/2)."
The principle of conservation of energy can be applied here to determine the required ratio. As the ball rolls down the inclined plane, the potential energy it possessed at the top is transformed into kinetic energy as well as rotational energy.
Now, let's assume the ball has a mass 'm', a radius 'r', and an inertial moment of '\(I = (2/5)mr^{2}\)' (for a solid sphere). Let 'h' represent the height of the inclined plane's top and 'θ' represent the angle that the plane makes with the horizontal.
By applying the principle of conservation of energy, we get:
\(mgh = (1/2)I\omega^2 + (1/2)mv^2\)
where, \(mgh\) = potential energy of the ball at the top of the plane ('g' denoting acceleration due to gravity), \((1/2)I\omega^2\) = rotational kinetic energy ('ω' being the angular velocity), and \((1/2)mv^2\) denoting the translational kinetic energy ('v' is the linear velocity) of the ball.
On simplifying the equation, we get:
\(\omega f/\omega c = \sqrt{5r/h}\)
where \(\omega f\)= angular velocity of the ball at end of the plane, and \(\omega c\) = angular velocity of the ball as it passes the center point C of the plane.
"sqrt (5/2)" is the correct option since it matches the expression obtained earlier, i.e., \(\omega f/\omega c = \sqrt{5r/h}\).
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An object accelerated at a rate of 50 m/s/s. A force of
100 N was used to make this happen. What is the mass
of the object?
Answer:
2kg
Explanation:
100N= force 50m/s²=acceleration
mass=?
the equation is;
Mass(kg)= Force(N) ÷ Acelleration(m/s²)
100÷50=2
as an interstellar cloud of hydrogen gas shrinks in size, its temperature increases
As an interstellar cloud of hydrogen gas shrinks in size, its temperature increases due to the principle of conservation of energy.
When the cloud contracts, gravitational potential energy is converted into thermal energy. The gravitational force pulling the gas inward does work on the gas particles, increasing their kinetic energy and causing them to move faster. As the particles move faster, collisions between them become more frequent and more energetic, resulting in an overall increase in temperature. This process is governed by the ideal gas law, which states that the pressure of a gas is directly proportional to its temperature when the volume is held constant. As the interstellar cloud contracts, its volume decreases, leading to an increase in pressure. According to the ideal gas law, this increase in pressure is accompanied by an increase in temperature.
Therefore, as the interstellar cloud of hydrogen gas shrinks in size, its temperature increases as gravitational potential energy is converted into thermal energy through the increase in kinetic energy of the gas particles.
FULL QUESTION: As an interstellar cloud of hydrogen gas shrinks in size, its temperature increases,
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if you added 2500 pounds and 2 tons what would be the total weight?4,500 pounds4 1/2 tons3/4 ton6500poundsi need some help
ANSWER:
6500 pounds
STEP-BY-STEP EXPLANATION:
To know the answer, we must first know the equivalence between tons and pounds, since it is the only way they can be added.
We know that 1 ton equals 2000 pounds, therefore:
\(\begin{gathered} 2\text{ tons}\cdot\frac{2000\text{ pounds}}{1\text{ ton}}=4000\text{ pounds} \\ \text{then, } \\ 2500\text{ pounds + 4000 pounds }=\text{ 6500 pounds} \end{gathered}\)if your smart in science please help me, thank u
Answer:
Air steel water
Explanation:
What is the magnitude of the output gear angular velocity (in units of rad/sec)?
The magnitude of the output gear angular velocity is 50 rad/sec. The actual value of the angular velocity will depend on the specific values of the gear ratio and the input gear's angular velocity.
The magnitude of the output gear angular velocity is determined by the gear ratio between the input and output gears. The gear ratio is the ratio of the number of teeth on the output gear to the number of teeth on the input gear.
To find the magnitude of the output gear angular velocity in units of rad/sec, you can use the formula:
Output gear angular velocity = Input gear angular velocity * (Number of teeth on input gear / Number of teeth on output gear)
Let's say the input gear has 20 teeth and the output gear has 40 teeth. If the input gear is rotating at 100 rad/sec, we
can calculate the output gear angular velocity as follows:
Output gear angular velocity = 100 rad/sec * (20 / 40) = 50 rad/sec
In this case, the magnitude of the output gear angular velocity is 50 rad/sec.
Remember to check the units and the gear ratio to ensure the correctness of your calculation. Also, note that the actual value of the angular velocity will depend on the specific values of the gear ratio and the input gear's angular velocity.
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10 points! quick and easy physics question :) please help me out it's for an assignment I need to turn in soon!
Which statement compares how secondary earthquake waves and soundwaves move? A.Both can move through liquids. B.Neither can move through liquids. C.Secondary earthquake waves can move through liquids, but sound waves cannot. D.Sound waves can move through liquids, but secondary earthquake waves cannot.
Answer:
D
Explanation:
Secondary earthquake waves is a seismic wave that can travel through solid but cannot travel through liquid and gas.
This wave is one of the fastest traveling seismic waves.
While sound wave can travel through both solid and liquid and even gas.
Therefore, the statement that compares how secondary earthquake waves and soundwaves move is:
Sound waves can move through liquids, but secondary earthquake waves cannot.
The best answer is therefore D
a water bottle at stp is cooled to -155°c. what is the new pressure
When a water bottle at STP is cooled to -155°C, the new pressure inside the bottle can be calculated using Charles' Law. The new pressure is approximately 0.432 atm.
The water bottle at STP is cooled to -155°C
We need to find the new pressure.
So, initially, the temperature of the bottle was 273 K (-0°C) as it was at STP. But it is cooled to -155°C, so the temperature decreases by (155+0) °C = 155°C = 155 K
The final temperature of the water bottle will be 273 K - 155 K = 118 K
We will use Charles' Law to calculate the new pressure. According to Charles' Law:
"For a fixed mass of gas at constant pressure, the volume of the gas is directly proportional to its absolute temperature."
That is, V / T = k
Here, V is the volume of the gas, T is its absolute temperature, and k is a constant. Thus, V1 / T1 = V2 / T2
Where V1 and T1 are the initial volume and temperature, respectively, and V2 and T2 are the final volume and temperature, respectively.
So, V1 / T1 = V2 / T2V1 = V2(T1/T2)
Pressure, P is directly proportional to Volume (V), so P1V1 = P2V2 (At constant temperature)
Here, P1 is the initial pressure, P2 is the final pressure, V1 is the initial volume, and V2 is the final volume.
So, P1V1 = P2V2
or, P2 = (P1V1) / V2P1 = 1 atm (At STP), V1 = V2 (Assuming water bottle as a closed container)
So, P2 = P1 (T2/T1) = (1 atm) (118 K / 273 K) = 0.432 atm
Therefore, the new pressure of the water bottle at -155°C is 0.432 atm.
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If the forces acting on an object are balanced, wihat must be true about the motion of this object?
Help!! I don’t know what to do
Answer:
Ok so I think i got it, Left is negative and so is down so if its facing down or left its negative force but if its right and up its positive so
A is neg
B is pos
C is Pos
D is Neg
E is Neg
f is Neg
Explanation:
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if it helps think about giving a good rating and branniest answer
Write a statement that explains how the internal and external structures you are discussing work together to support growth and reproduction.
(I WILL GIVE 90 POINTS IF YOU ANSWER THIS!)
Answer: plants have internal and external structures that support growth and reproduction Examples of internal structures are the xylem and phloem Examples of external structures are the roots and stems. All of these structures provide plants with nutrients and food
Explanation: BRAIN
PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Which of the following describes the terrain of the arctic tundra? (Select all that apply.)
A Treeless
B flat
C mountainous
D dry
A stone hits the bottom of an old mineshaft that is 210 m deep. If the temperature in the mineshaft is 10°C, how many seconds pass before the sound is heard at the top of the mine shaft?
The speed of sound in air at 10°C is approximately 343 meters per second. Let's use the formula:
distance = speed x time
We want to find the time it takes for the sound to travel 210 meters to the top of the mineshaft. So we can rearrange the formula to solve for time:
time = distance ÷ speed
Plugging in the values we have, we get:
time = 210 ÷ 343
time ≈ 0.612 seconds
Therefore, it takes approximately 0.612 seconds for the sound to travel from the bottom to the top of the mineshaft.
Explain why when water is at the boiling process in a pot it represents convection instead of conduction?
Answer:
When boiling water, the temperature of molecules within the water increases
Explanation: and they slowly begin to move at a rapid rate, upwards. ... The hot water molecules become less dense, and they rise above the denser cooler molecules. This movement of molecules creates convection currents.
a vector is 55.1 m long pointing in a 13.9 degree angle
The y-component of the vector is 13.24 m.
What is vector component?Vector components allow us to break a single vector quantity into two or more scalar quantities with which we have more mathematical experience.
The two component of a vector include;
y-component of the vectorx-component of the vectorWhat is x-component of a vector?The component of a vector that acts in horizontal direction is known as x-component of the vector.
What is y-component of a vector?The component of a vector that acts in vertical direction is known as y-component of the vector.
The y-component of the vector is calculated as follows;
Vy = V sinθ
Vy = 55.1 m x sin(13.9)
Vy = 13.24 m
Thus, the y-component of the vector is 13.24 m.
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The complete question is below:
a vector is 55.1 m long pointing in a 13.9 degree angle. Find the y-component of the vector.
In Fig. 5-64, a force F of magnitude 12 N is applied to a FedEx box of mass m_2 = 1.0 kg. The force is directed up a plane tilted by theta = 37degree. The box is connected by a cord to a UPS box of mass m_1 = 3.0 kg on the floor, The floor, plane, and pulley are frictionless, and the masses of the pulley and cord are negligible. What is the tension in the cord?
The forces acting on m 2 are F acting uphill, T acting downward, and m 2 gsin acting downhill, where o=37 o. The rightward-pointing tension is the sole horizontal force acting on m 1. The result of the tension is 4.6 n.
How do tension forces work?In physics, a tension force is a force created when a rope, string, or cable is stretched as a result of an external force. Along the length of the rope or cable, tension is exerted in the opposite direction as the force acting on it. Stress, tensity, and tautness are other terms that may be used to describe tension.
Describe tension force with an example.Compression force's opposite is tension. Every object in the scene that is in contact with another one produces a force.
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A model airplane traveling at 5 m/s approaches you. The frequency of the hum produced by the motor is 652 hz. Assume the speed of sound to be 342 m/s. What is the observed frequency of the hum?.
The observed frequency of the hum is 661.67 Hz
How to calculate the observed frequency?
Given
\(V_{S}\) = The velocity of the source. Here the moving source is the airplane.
Therefore, \(V_{S}\) = 5 m/s
\(V_{W}\) = The velocity of sound = 342 m/s
\(F_{S}\) = Frequency of hum produced by the motor = 652 Hz
\(F_{W}\) = Observed frequency of the hum =?
Calculation
Th observed frequency of the hum is calculated by following formula
\(F_{O}\) = \(F_{S}\)× \(\frac{V_{W} }{V_{W-V_{S} } }\)
\(F_{O}\) = 652 342342-5
= 652 342337
= 661.67 Hz
What are the observed and expected frequencies?
A theoretically predicted frequency from an experiment is called an expected frequency, and it is assumed to be true until statistical evidence in the form of a hypothesis test proves it to be false. On the other hand, an observed frequency is an actual frequency that was discovered through the experiment.
The observed frequency of the hum is 661.67 Hz
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The observed frequency of the hum will be: 661.67 Hz or 662 Hz.
To calculate the frequency change of a moving source, the formula used is:
Fo = f × c/c-Vs
where:
f = frequency observed
c = speed of sound
Vs = speed of source
fo = observed frequency
f = 342×652/(342-5)
f = 661.67 Hz or 662 Hz
What are the observed and expected frequencies?
Frequencies theoretically predicted from experiments are called expected frequencies and are assumed to be true until proven false by statistical evidence in the form of hypothesis testing. Observed frequencies, on the other hand, are the actual frequencies found by experiment.
The observed frequency of the hum will be: 661.67 Hz or 662 Hz.
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what is the passage of light through an object?
A.) Transmission
B.) Constructive Interference
C.) Destructive Interference
D.) Absorption
E.) Refraction
F.) Diffraction
Answer:
transmission
Explanation:
A standing wave has points of constructive interference called _________ and points of destructive interference called ___________.
A. troughs, crests
B. nodes, antinodes
C. antinodes, nodes
D. crests, troughs
Answer:
The answer is nodes because nodes stay in a fixed position.
Explanation:
hope it help
srry if wrong
A standing wave has points of constructive interference called antinodes and points of destructive interference called nodes
What are constructive and destructive interferenceThis position, where the resulting wave is larger than either of the two original, is called constructive interference.
When the first wave is leading, the second wave is down and the addition of the two is zero. This is called destructive interference.
A standing wave occurs when two waves with the same properties moving in the opposite direction, in the same media, interfere with one another.
Nodes are points where the waves interact destructively, causing an appearance of the wave standing still. The opposite of nodes is antinodes where they are points of maximum displacement due to constructive destruction.
Thus the standing wave has points of constructive interference called antinodes and points of destructive interference called nodes
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Define centre of gravity and centre of Bouyancy
Answer:
Center of Gravity is the point in a body where the gravitational force may be taken to act. Center of Buoyancy is the center of gravity for the volume of water which a hull displaces.
Which of the following statements about Australian football is TRUE?
A.
The players tend to wear a large amount of padding.
B.
Goals are scored by kicking the ball through goalposts.
C.
Each team has a number of set plays for both offense and defense.
D.
The constant movement of the ball is similar to baseball.
Answer:
B.
Goals are scored by kicking the ball through goalposts.
Explanation:
How strong is the electric field between two parallel plates 4.4 mm apart if the potential difference between them is 220 v?
The electric field between the plates is 50,000 N/C.
CalculationIt is provided that the separation d between the plates is 4.4 mm and the potential difference V between the plates is 220 V.
The electric field E between the plates can be formulated as follows.
E=\(\frac{V}{d}\)
substituting the values in the equation,
E= \(\frac{220}{0.0044}\)
E= 50,000 N/C
Hence, we can say that the electric field between the plates is 45833.33 N/C.
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When did stromatolites appear on Earth?
A. Hadean
B. Mesozoic
C. Archean
Answer:
It would be D. Proterozoic because they appeared 542 million years ago.
Answer: It's C: Archean
Explanation: I got it right on the quiz.
The fact that some well-known studies have been repeated without finding results consistent with those in the initial report describes a(n) ________ that is currently affecting research in psychology and other fields.
Answer:
Replication Crisis
Explanation:
Replication crisis in psychology- It refers to the concerns about credibility of finding the results in psychological science.
Signals that are broken up into binary code are characterized as
.
Answer:
AM/FM radio is a perfect type of technology.
A smart phone is also a great presentation of technology.
Explanation:
have great day