In which of the following does Einstein's famous equation apply
A. a driver brings a car to a halt
B. collisions between objects
C. water falling in a waterfall
D. nuclear fission and fusion reactions

Answer:

the answer is equal to the microwave gamma rays visible light x-rays.

Answer:

An incandescent bulb use electrical energy

Explanation:

Mechanical energy of air per unit mass is calculated by the formula:Mechanical energy/unit mass \(m = \frac{1}{2} \times p\times v^2\)

The design, manufacture, and use of machinery are the focus of the engineering discipline known as mechanical engineering. It is the application of physical principles to the design, construction, and operation of machines and tools.

Mechanical engineering also covers a wide range of sub-disciplines that include manufacturing, automation, energy systems, robotics, materials science, and nanotechnology.

Where ρ is the air density and v is the wind speed. In our case, the mechanical energy of air per unit mass is ½*1.25 kg/m3*(10 m/s)2 = 62.5 J/kg.

The power generation potential of the wind turbine can be calculated by the formula:Power generation potential = (1/2)*ρ*π*R2*v3Where ρ is the air density, R is the radius of the blades, and v is the wind speed.

Therefore, In our case, the power generation potential is

\((1/2) \times 1.25 kg/m3 \times \pi \times (0.055 m)2 \times (10 m/s)3 = 3.15 kW.\)

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The statement 'establishing a high critical value in a statistical test is associated with more confidence' is TRUE.

The statistical significance is a arbitrary value used to indicate that data collected can be used to confirm (or reject) my working hypothesis.

The most widely used value to measure the statistical significance is the p threshold.

In conclusion, the statement 'Establishing a high critical value when calculating the results of a statistical test means that a researcher will have more confidence in finding significance than when a lower critical value is established' is TRUE.

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Answer:

The answer is F or false

Explanation:

correct edge 2023

The critical angle for light traveling from crown glass (refractive index = 1.52) into water (refractive index = 1.33) is approximately 47.14 degrees.

The critical angle is a phenomenon in optics that occurs when light travels from a medium with a higher refractive index to a medium with a lower refractive index. When the angle of incidence of the light exceeds the critical angle, the light is no longer refracted but is instead reflected back into the original medium. The critical angle can be calculated using the formula:

Critical angle = arcsin(n2 / n1),

where n1 is the refractive index of the initial medium (crown glass) and n2 is the refractive index of the second medium (water).

In this case, the refractive index of crown glass (n1) is 1.52, and the refractive index of water (n2) is 1.33. Plugging these values into the formula, we get:

Critical angle = arcsin(1.33 / 1.52) ≈ arcsin(0.875) ≈ 47.14 degrees.

Therefore, the critical angle for light traveling from crown glass to water is approximately 47.14 degrees. If the angle of incidence is greater than this critical angle, the light will undergo total internal reflection at the interface between the two media, staying within the crown glass and not entering the water.

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The speed of the lower part of the Variegated Glacier on June 9, 1983, was approximately 0.00074 meters per second.

The speed of the lower part of the Variegated Glacier in Alaska is 0.64 meters per second.
To convert the glacial speed from feet per day to meters per second, first, we need to convert feet to meters and then days to seconds.

On June 9, 1983, the lower part of the Variegated Glacier in Alaska was observed to be moving at a rate of 210 feet per day.

1 foot = 0.3048 meters
210 feet = 210 * 0.3048 = 64.008 meters

1 day = 24 hours = 24 * 60 minutes = 24 * 60 * 60 seconds = 86,400 seconds
Now, we can find the speed in meters per second:
Speed = (64.008 meters) / (86,400 seconds) ≈ 0.00074 m/s

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Answer: Earthquakes and Volcanic eruptions

Explanation:

You did not attach a picture however, this should be the correct answer.

Mid-oceanic ridge plate  boundaries such as the Mid-Atlantic Ridge form as a result of plate separating at the boundary. This leads to earthquakes due to the forces of tension acting on the plates.

When this happens, the mantle is exposed and therefore there will be volcanic eruptions as the lava comes to the surface as magma. When this magma cools it creates new seafloors and underwater mountains.

The hailstone will hit the earth in 4.04 seconds.

we move 9.8 meters per second faster thanks to gravity. we   start to fall after one second at 9.8 m/s. we start falling at 19.6 m/s after two seconds, and so forth.

From the query, the following information may be deduced:

Height (H) = 120 m

Gravitational acceleration (g)=9.8 m/s2.

Time (t)=?

It is possible to determine the hailstone's impact time as:

h=1/2 gt²

120= 1/2 x 9.8 x t²

120x2/9.8=t²

t²=24.48

t=4.94 s

therefore, the calculated time taken is 4.94 s.

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the current I1, in amps I1, the current I2, in amps I2, and the current I3, in amps I3, are each 2.40, 1.40, and 1.00 A, respectively.

Kirchhoff's rules and Ohm's law may be used to create a system of equations that will allow us to determine the current I1. We may start by writing the following equation for the outer loop using Kirchhoff's loop rule: ℰ1 - I1(R1 + R2) - I2R2 = 0

At the intersection of R2 and R3, we can then utilise Kirchhoff's junction rule to formulate the following equation: V2 = I2R2 V3 = I3R3: I2 + I3 = I1 R3

Also, we are aware that the voltage across R2 is the sum of the two emfs:

V2 = ℰ2 - I2r2

These equations allow us to find solutions for I1, I2, and I3. When we solve the set of equations, we obtain: I1 = 2.40 A

I2 = 1.40 A\sI3 = 1.00 A

The currents passing through each resistor in the circuit are represented by these values.

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The acceleration of the ball is  0.813m/s^2

We know that according to second law of motion,

F= ma

Total force = 10N+2.2N= 12.2N

M= 15 kg

a= F/M = 12.2/15= 0.813m/s^2

Newton's first law of motion describes the behavior of objects whose forces are all balanced. The first law, often known as the law of inertia, asserts that if the forces acting on an object are balanced, the object's acceleration is 0 m/s/s. Objects in equilibrium (the state in which all forces are equal) will not accelerate. Newton stated that an object will only accelerate if it is subjected to a net or unbalanced force. An item will accelerate in the presence of an imbalanced force, changing its speed, direction, or both speed and direction.

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False, Fiber optic cable is thinner and lighter than unshielded twisted pair (UTP) cable.

Fiber optic cables are made up of strands of glass or plastic fibers that transmit data through light pulses. They are immune to electromagnetic interference and can transmit signals over longer distances than UTP cables, which are made up of copper wires.The content loaded Fiber optic cable is used in high-speed internet connections because it can transmit large amounts of data at very high speeds. Additionally, fiber optic cables are more secure than UTP cables because they are much more difficult to tap into without being detected. Therefore, the statement that fiber optic cable is thicker and heavier than UTP cable is false.

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The path of a charged particle moving parallel to a uniform magnetic field will be straight line

Force on a charged particle moving in a magnetic field can be calculated by = q.(v*B )

q = charge of the particle

v = velocity of the particle

B = magnetic field

theta = angle between v and B

q . (v B sin (theta) )

Since,  particle is parallel to the magnetic field

hence , theta = 0°

so sin(theta) = sin 0° = 0

hence , force = 0

since , there is no force acting on the particle it will remain in that motion in hat it was when it initially came in the magnetic field . Hence It will be moving along a straight line path because the magnetic force on the charged particle is zero.

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Answer:

16m

Explanation:

Given parameters:

Time  = 4s

Initial velocity  = 0m/s

Acceleration  = 2m/s²

Unknown:

How far will the body move  = ?

Solution:

To solve this problem, we use the expression below:

  s  = ut  + \(\frac{1}{2}\) at²  

s is the distance

u is the initial velocity

t is the time

a is the acceleration

   s  = (0 x 4) + ( \(\frac{1}{2}\) x 2 x 4²)  = 16m

Answer:

At neutron star density, the Earth's whole mass would fit inside a 305-meter-diameter sphere.

Explanation:

According to  the given statement The force exerted by the string on the object is 2.7 N.

Any item travelling in a circular direction has a tangential velocity, which is its linear speed. On a turntable, a point in the centre moves less distance in a full rotation than a point near the outside edge.

Tangential velocity is determined by dividing the circle's circumference by the time required for one complete rotation: 2*pi*r/t. The formula V = w * r, where w (omega) is the angular velocity of the rotating object and r is the radius of the circle, also relates it to angular velocity.

m = 0.9 kg

r = 3m

v = 3m/s

Force (f) = mv2/r

Now ,putting values

force (f) = \(\frac{0.9 k g \times\left(3 \mathrm{~ms}^{-1}\right)^2}{3 \mathrm{~m}}\)

F = 2.7 N

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Answer:

22J+10

Explanation:

that is it in verbal expression

Muscles are protected from damage caused by excessive contraction by D. Golgi tendon organs

Muscles are protected from damage caused by excessive contraction by Golgi tendon organs. Golgi tendon organs are sensory receptors located at the junction between muscles and tendons. They detect changes in tension or force within the muscle-tendon complex.

When excessive force is applied to a muscle during contraction, the Golgi tendon organs are activated. They send inhibitory signals to the muscle, causing it to relax and prevent further contraction. This protective mechanism helps prevent muscle damage and maintain the integrity of the musculoskeletal system. Options A, B, C, and E are not directly involved in protecting muscles from excessive contraction. Gamma efferents are motor neurons that innervate muscle spindles, which are involved in muscle stretch reflexes. Hence the correct option is D.

Spindle afferents transmit sensory information from muscle spindles. Extrafusal motor pools are groups of motor neurons that innervate extrafusal muscle fibers. Synergistic muscles are muscles that work together to produce a coordinated movement.

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Answer:

33 Celsius is 306.15 in absolute temperature

Answer:

it can be built in mine craft

Explanation:

Answer:

put 2 pistons on each side and then put the block you want the door to be and power it with redstone

Answer:

122.4

Explanation:

The amount of substance affects the total energy through the concept of molar heat capacity. Molar heat capacity is defined as the amount of heat required to raise the temperature of one mole of a substance by one degree Celsius. Therefore, the more substance there is, the more heat energy is required to raise its temperature.

For example, if we have one mole of a substance, it will require a certain amount of energy to raise its temperature by one degree Celsius. However, if we have two moles of the same substance, it will require twice as much energy to raise the temperature of the larger amount by the same one degree Celsius.

Additionally, the amount of substance can affect the total energy through the concept of specific heat capacity. Specific heat capacity is defined as the amount of heat required to raise the temperature of one unit of mass (usually one gram) of a substance by one degree Celsius. Therefore, if we have more mass of a substance, it will require more energy to raise the temperature of the larger amount by the same one degree Celsius.

In summary, the amount of substance affects the total energy through the concepts of molar heat capacity and specific heat capacity, which determine how much energy is required to raise the temperature of a given amount of substance.

After 30 minutes, there will be approximately 209.71 pounds of salt present in the mixture.

To determine the amount of salt present after 30 minutes, we need to solve the linear differential equation (DE) dA(t) = R1 - R2 dt, where A(t) represents the amount of substance at time t, R1 is the rate at which the substance enters the mixture, and R2 is the rate at which it leaves.

In this case, R1 is given as 12 lb/min (the rate at which salt is pumped into the container), and R2 is given as 3A(t) lb/min (the rate at which salt leaves, depending on the amount present at time t).

Using the differential equation, we can rewrite it as dA(t) = 12 - 3A(t) dt. To solve this equation, we separate variables and integrate both sides.

∫ dA(t) / (12 - 3A(t)) = ∫ dt.

By integrating, we obtain ln|12 - 3A(t)| = t + C, where C is the constant of integration.

Next, we apply the initial condition that there are initially 20 lb of salt in the mixture, i.e., A(0) = 20. Substituting these values, we find C = ln(12 - 60) = ln(-48).

Plugging in t = 30 and solving for A(t), we have ln|12 - 3A(30)| = 30 + ln(-48). Exponentiating both sides, we get 12 - 3A(30) = -48\(e^{30\), and solving for A(30), we find A(30) ≈ 209.71 pounds of salt.

Therefore, after 30 minutes, there will be approximately 209.71 pounds of salt present in the mixture.

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Answer:

The thermal efficiency, \(\eta _{reheat}\), of the Rankine cycle with reheat is 36.81%

Explanation:

p₁ = 8 MPa = 80 Bars

T₁ = 450°C = 723.15 K

From steam tables, we have;

v₁ = 0.0381970 m³/kg

h₁ = 3273.23 kJ/kg

s₁ = 6.5577 kJ/(kg·K) = s₂

The p₂ = 0.8 MPa

T₂ = Saturation temperature at 0.8 MPa = 170.414°C = 443.564 K

h₂ = 2768.30 kJ/kg

\(T_{2'}\) = 400°C = 673.15 K

\(h_{2'}\) = at 400°C and 0.8 MPa = 3480.6 kJ/kg

p₃ = 10 kPa = 0.1 Bar

T₃ = Saturation temperature at 10 kPa = 45.805 °C = 318.955 K

h₃ = 2583.89 kJ/kg

h₄ = \(h_{3f}\) = 191.812 kJ/kg

The thermal efficiency, \(\eta _{reheat}\), of a Rankine cycle with reheat is given as follows;

\(\eta _{reheat} = \dfrac{\left (h_{1}-h_{2} \right )+\left (h_{2'}-h_{3} \right )-W_{p}}{h_{1}-\left (h_{4}+W_{p} \right )+\left (h_{2'}-h_{2} \right )}\)

Therefore, we have;

\(\eta _{reheat} = \dfrac{(3273.23 -2768.30 ) + (3480.6 -2583.89 ) - 8.04)}{(3273.23 -(191.812 + 8.04) + (3480.6 -2768.30 ) } = 0.3681\)

Which in percentage is 36.81%.

Answer:

100

Explanation:

my apologies if I am wrong

Answer:

B.

Explanation:

This is not true as the number of chromosomes in the daughter cells are half the number in the parent's cells

Therefore, we cannot calculate the exact time for one cycle without more information.

The time for one cycle of a planet around the Sun is determined by its orbital period, which is related to the average distance of the planet from the Sun. In this case, if the average distance of the planet from the Sun is 21 astronomical units (A.U.), we can use Kepler's Third Law to calculate the orbital period.

Kepler's Third Law states that the square of the orbital period (T) is proportional to the cube of the average distance (r) between the planet and the Sun. Mathematically, it can be expressed as:

T^2 = k * r^3

Where k is a constant.

Given that the average distance is 21 A.U., we can set up the following equation:

T^2 = k * 21^3

To solve for T, we need the value of the constant k. However, without further information or additional equations, we cannot determine the specific value of k. Therefore, we cannot calculate the exact time for one cycle without more information.

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To work a ball of dough with the fingertips or heels of the hands by repeating press, fold, and turn motions is to knead the dough.

This process helps develop the gluten in the dough, resulting in a smooth and elastic texture.

Here's a more detailed explanation of the kneading process and its effects on the dough:

Gluten Development: Gluten is a network of proteins found in wheat flour. When the dough is kneaded, the proteins in the flour, called glutenin and gliadin, combine and form gluten strands.

Kneading promotes the alignment and cross-linking of these protein strands, creating a network that gives the dough its structure and elasticity.

Incorporation of Air: During the kneading process, air is also incorporated into the dough. The repeated folding and pressing motions trap air bubbles within the dough, contributing to its light and airy texture once baked.

Hydration and Consistency: Kneading helps distribute moisture evenly throughout the dough. This ensures that all the flour particles are hydrated, resulting in a consistent texture and flavor.

It also helps to achieve the desired consistency of the dough, adjusting it from a sticky or shaggy state to a smooth and workable one.

Activation of Yeast: Kneading provides mechanical action that activates the yeast present in the dough. Yeast is a microorganism that ferments the sugars in the dough, producing carbon dioxide gas.

Kneading helps distribute the yeast evenly, promoting fermentation and allowing the dough to rise.

Development of Flavor: Kneading also impacts the flavor of the dough. As the dough is worked, enzymes naturally present in the flour are activated, converting starches to sugars.

These sugars then undergo fermentation by yeast, resulting in the release of various flavorful compounds that contribute to the overall taste of the final baked product.

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brainliest answer please.

answer:

a. Examples of a force causing an object to start moving are pushing a shopping cart to start moving and applying force to a stationary car to move it forward.

b. Examples of a force causing an object to stop moving are applying brakes to a bicycle to stop it and pushing a toy car in the opposite direction to its motion to slow it down.

c. Examples of a force causing an object to change its direction of motion are hitting a tennis ball with a racket to change its direction and turning a steering wheel to change the direction of a car.

Two examples of field forces are gravitational force and electromagnetic force. Gravitational force is the force that exists between any two objects with mass, and it's responsible for the motion of the planets around the sun. Electromagnetic force is the force that exists between charged particles, and it's responsible for many everyday phenomena such as light and electricity.

Two examples of contact forces observed in everyday life are frictional force and tension force. Frictional force arises between two objects in contact when there is relative motion or tendency of motion between them. Tension force is exerted by a string or rope when it's pulled on from both ends.

The SI unit of force is the Newton (N). The Newton is equivalent to kg⋅m/s^2, which means it can be defined in terms of the fundamental units of mass, length, and time.

Force is a vector quantity because it has both magnitude and direction. When an object is subject to more than one force, the net force on the object is the vector sum of all the forces acting on it. The direction of the net force determines the direction of the resulting motion of the object.

A free-body diagram of a football being kicked would show two forces acting on the ball: the force due to gravity acting downwards and the force exerted by the kicker acting in the direction of the kick. The diagram would show the football as a point mass and the forces as arrows with their tails at the center of mass of the ball. The force due to gravity would be shown as a downward arrow, while the force exerted by the kicker would be shown as an arrow in the direction of the kick. The length and direction of each arrow would be proportional to the magnitude and direction of the corresponding force.