how can you tell the waves from Sun are electromagnetic waves?

Answer:

 y = y₀ (1 - ½ g y₀ / v²)

Explanation:

This is a free fall problem. Let's start with the ball that is released from the window, with initial velocity vo = 0 and a height of the window i

          y = y₀ + v₀ t - ½ g t²

          y = y₀ - ½ g t²

for the ball thrown from the ground with initial velocity v₀₂ = v

         y₂ = y₀₂ + v₀₂ t - ½ g t²

in this case y₀ = 0

         y₂2 = v t - ½ g t²

at the point where the two balls meet, they have the same height

         y = y₂

         y₀ - ½ g t² = vt - ½ g t²

         y₀i = v t

         t = y₀ / v

since we have the time it takes to reach the point, we can substitute in either of the two equations to find the height

         y = y₀ - ½ g t²

         y = y₀ - ½ g (y₀ / v)²

         y = y₀ - ½ g y₀² / v²

        y = y₀ (1 - ½ g y₀ / v²)

with this expression we can find the meeting point of the two balls

Answer:

Double helix

Explanation:

The Double helix is a DNA molecule. The two strands around the Double Helix is called the twisted ladder.

Answer:

double helix

Explanation:

Answer:

16

Explanation:

6+10=16

the box will go forward but it will be a little harder.

Answer:

True!

Explanation:

Answer:

605 J

Explanation:

Efficiency = work out / work in

0.78 = W / 775 J

W = 605 J

Answer:

500

p=w/t

w=force *displacement

w=750*20=15000j

p=15000/20=500watt

Explanation:

500

p=w/t

w =force displacement

w=750*20=15000j

p=15000/20=500 watt

The 8 types of waves found on the electromagnetic spectrum, from longest to shortest wavelength, are: Radio waves , Microwaves , Infrared radiation, Visible light, Ultraviolet radiation, X-rays, Gamma rays.

The electromagnetic spectrum is a range of electromagnetic waves that includes radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.

The wavelength of an electromagnetic wave is the distance between consecutive points of equal phase in the wave. The shorter the wavelength, the higher the frequency of the wave.

Radio waves have the longest wavelength and the lowest frequency of the electromagnetic waves. Gamma rays have the shortest wavelength and the highest frequency.

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Goal posts at the end of football field are padded as a safety measure to players who might run into them,these thick paddings of the goal posts are done to prevent injuries to the players because the padding of the goal post increases the time of impact and this in-turn decreases the force on the the players body or the force it will have when a player's body hit against it and therefore decreasing the force applied to bring the player to a stop.

We can also say that it increases the time of collision between the player's body and the post.

Answer:

Part A: \(1.97ms^{-1}\) (2 s.f.)
Part B: 0.33m (2 s.f.)

Explanation:

Part A:

Frequency = \(\frac{1}{period} = \frac{1}{3}\) Hz

Wavespeed = frequency x wavelength
Wavelength = distance between two crests = 5.90

Freq = 1/3 Hz

Therefore: Wavespeed = 1/3 x 5.90

                  Wavespeed = 1.967 ms^-1

Part B:
Amplitude = \(\frac{peak-to-peak- amplitude }{2}\)

Peak to peak amplitude = 0.65m

Amplitude = 0.65/2 = 0.325m = 0.33m 2sf

An electromagnet consists of a conductive wire wrapped around a magnetic core, creating a magnetic field when an electrical current is passed through it.

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Answer:

Explanation:

Sure, I'd be happy to help you with the question!

Let's denote the input as x. According to the function machine, the input is multiplied by 6 and then 80 is subtracted from the result to obtain the output.

So, the function can be written as:

Output = (6 * x) - 80

Now, the problem states that the input is the same as the output. Therefore, we can set up the equation:

x = (6 * x) - 80

Let's solve this equation to find the value of x:

x = 6x - 80

Subtracting 6x from both sides, we get:

x - 6x = -80

Combining like terms, we have:

-5x = -80

Dividing both sides by -5, we find:

x = (-80) / (-5)

Simplifying the expression, we have:

x = 16

Therefore, the input (x) that results in the input being the same as the output is 16.

To work out these types of questions, it's important to carefully read the instructions and understand the operations being performed in the function machine. Then, you can set up an equation with the input and output, and solve for the unknown value. Always double-check your solution to ensure it satisfies the given conditions of the problem.

Answer:

16

Explanation:

(x*6) - 80 = x

Multiply the parentheses

6x - 80 = x
Add 80 to each side to get
6x = x + 80
Subtract x from both sides to get
5x = 80
Divide both sides by 5
x = 16

Answer:

Atoms.

Explanation:

The fundamental structure obstructs that make matter are called molecules. What are the various particles found in iotas? (Reply: electrons, protons and neutrons) Where are they found? (Reply: Protons and neutrons are found in the core, and electrons are found in shells around the outside of the core.)

Really hope this helps! :D

Explanation:

The basic components of matter are called atoms. What are the various particles present in an atom?

(Answer: electrons, protons, neutrons) Where are they? (Answer: Protons and neutrons are in the nucleus, and electrons are in the shell around the nucleus.)

Answer:

F = 10.86 units

Explanation:

The magnitude of a vector in terms of the magnitude of its rectangular components is given by the following formula:

F = √(Fₓ² + Fy²)

where,

F = Magnitude of the Vector = ?

Fₓ = magnitude of the x-component of vector = 8.7 units

Fy = magnitude of y component of vector = - 6.5 units

Therefore, using these values in the equation, we get:

F = √[(8.7 units)² + (- 6.5 units)²]

F = √(117.94 units²)

F = 10.86 units

The constant angular acceleration (in rad/s²) of the centrifuge is 255.66 rad/s².

The constant angular acceleration of the centrifuge is calculated as follows;

ωf² = ωi² - 2αθ

where;

When the centrifuge is switched off, the final angular velocity = 0

Initial angular velocity: ωi = 3,750 rev/min x 2π rad/rev x 1 min/60 s = 392.7 rad/s

angular displacement: θ = 48 rev = 48 rev x 2π rad/rev = 301.6 rad

0 = ωi² - 2αθ

2αθ = ωi²

α = ωi²/2θ

α = (392.7²) / (2 x 301.6)

α = 255.66 rad/s²

Thus, the constant angular acceleration (in rad/s²) of the centrifuge is 255.66 rad/s².

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The stopping distances are found to be 218.13 m and 149 m, respectively, for

a = -2.6 m/s²

b = -5.5 m/s² with time 0.3 s.

Newton's equations of motion link an object's motion to the forces acting on it. According to the first law, an object won't change its motion until a force is applied to it. The second law states that an object's force can be determined by multiplying its mass by its acceleration. The third law states that when two things come into contact, they put equal and opposing pressures on one another.

Initial speed = U = 94Km/hr

=> 26.11m/s

a1 = -2.6m/s²

a2 = -5.5 m/s²

Final velocity = V = 0

t= 0.3sec

A) the stopping distance with a1 = -2.6m/s²:

V² = U² +2as

=> 0 = 26.11² + 2 x -2.6 x s

S=> 131.1 m

the stopping distance  

=> 26.11/0.3 + 131.1

=> 218.13m

B) the stopping distance with a2 = -5.5 m/s²:

V² = U² +2as

=> 0 = 26.11² + 2 x -5.5 x s

S=> 61.97 m

the stopping distance  

=> 26.11/0.3 + 61.97

=> 149m

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Answer:

72mph/sec

Explanation:

The car goes from 100mph to 316mph in three seconds. Meaning it increases its speed by (316 - 100)mph in three seconds. That is 216 mph increase in three seconds. So, we divide the speed increase by the amount of time the increase occurred over. We get:

216mph / 3sec = 72mph/sec, our final answer

Hope it made sense. I would appreciate Brainliest, but no worries.

Answer:

For example, the toes are anterior to the heel, and the popliteus is posterior to the patella. Superior and inferior, which describe a position above (superior) or below (inferior) another part of the body. For example, the orbits are superior to the oris, and the pelvis is inferior to the abdomen.

Explanation:

The coefficient of performance (COP) for a Carnot refrigeration cycle is given by:

COP = QL / W

where QL is the amount of heat extracted from the cold reservoir and W is the work done on the system.

For an ideal Carnot cycle, the COP is given by:

COPideal = TL / (TH - TL)

where TH is the temperature of the hot reservoir and TL is the temperature of the cold reservoir.

Since we are not given the work done on the system, we cannot determine the ideal COP. However, we can still calculate the actual COP using the given temperatures and pressures.

First, we need to determine the temperatures at the two states of the cycle. Since the pressure ranges between 0.2 bar and 1 bar, we can assume that the air behaves as an ideal gas and use the ideal gas law:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

At state 1, the pressure is 1 bar and the volume is V1 = nRT1/P1, where T1 = 25°C + 273.15 = 298.15 K. Similarly, at state 2, the pressure is 0.2 bar and the volume is V2 = nRT2/P2, where T2 = -15°C + 273.15 = 258.15 K.

The amount of heat extracted from the cold reservoir is given by:

QL = nCp(T2 - T1)

where Cp is the specific heat capacity of air at constant pressure.

The work done on the system is given by:

W = nRT1ln(P2/P1)

Putting all these values together, we get:

COP = QL / W

COP = nCp(T2 - T1) / [nRT1ln(P2/P1)]

COP = Cp(T2 - T1) / [RT1ln(P2/P1)]

Substituting the values, we get:

COP = (1.005 kJ/kg K) (258.15 K - 298.15 K) / [(8.314 J/mol K) (298.15 K) ln(0.2/1)]

COP ≈ 2.5

Therefore, the coefficient of performance for the Carnot refrigeration cycle of one mole of air is approximately 2.5.

Answer:

In fact, God already knows how your story will end. The thing is, it’s really his story and he created you to be a unique and significant part of it. That’s why you can have faith that he is working to take care of you and to give you a good future. God repeatedly says in Scripture that he will one day reward us for our faith.

Good luck

Explanation:

The degree of data stability when the measurement is replicated under identical circumstances is known as reproducibility or reliability.

Reproducibility determines how an entire study an experiment can be replicated, whereas repeatability assesses the variation in data made by a single equipment or human under similar circumstances.

Science needs reproducibility because it enables more in-depth investigation, and replication validates our findings. There are several investigations and experiments, which result in a wide range of variables, unforeseen, and things that are either outside your influence or you cannot guarantee.

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Answer: Weak or repulsive

Explanation: The amount of electrical force would be weak based on the distance between the two objects.

Based on the data in the table, the two objects will have a repulsive force of medium strength.

This is because the two objects have the same charge, and like charges repel each other. The force is calculated using the following formula:

F = k × (Q₁ × Q₂) / r²

where:

F = force in newtons

k = Coulomb's constant (8.988 x 10⁹ N m²/C²)

Q₁ and Q₂ = charges in coulombs

r = distance between the charges in meters

In this case:

F = medium

k = 8.988 x 10⁹ N m²/C²

Q1 = Q2 = +1 C

r = 10 mm = 0.01 m

Substituting these values into the formula gives:

F = (8.988 x 10⁹ N m²/C²) × (+1 C × +1 C) / (0.01 m)²

= 8.988 x 10⁶ N

Therefore, the two objects will have a repulsive force of medium strength.

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This statement is True because A synchronizer sleeve is moved to the input shaft chain sprocket by the mode fork, which resembles a shift fork in a manual transmission, once four-wheel drive .

When a vehicle has a manual transmission, the driver controls the clutch and selects the appropriate gear. Most drivers believe a manual transmission, or stick gear as it is commonly known, gives them a greater sense of involvement with the car's operation and makes driving more enjoyable.

A manual gearbox is essentially a gear train that allows the driver to select from a variety of gear ratios to operate the vehicle. Higher gear ratios provide less torque but more speed, while lower gear ratios provide more torque but less speed.

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Answer:

L = 8.35 m

Explanation:

The lenght of a wire L can be calculated using the following expression:

L = R A/ρ  (1)

Where:

R: resistance of the wire

A: Cross section area of the wire

ρ: resistivity of the copper wire.

With this expression we realize that we do not have the area of the cross section, and the resistance of the wire either.

To calculate the area we can use the following expression:

A = πr²    (2)

If the diameter is 0.25 mm, then the radius is half, 0.125 mm. Converting this in meter it will have to be:

0.125 /1000 = 0.000125 m

Replacing we have:

A = π(0.000125)²

A = 4.91x10⁻⁸ m²

The reported resistivity of a copper wire is 1.68x10⁻⁸ Ω.m, so we just need to determine the resistance, which can be found using Ohm's law:

R = V/I  (3)

Replacing (3) into (1) we have:

L = (V * A) / (I * ρ) (4)

So finally, the length of the copper wire will be:

L = (12 * 4.91x10⁻⁸) / (4.2 * 1.68x10⁻⁸)

Hope this helps

Answer:

c

Explanation:

Answer:

1.Stress is a feeling that's created when we react to particular events.

2. What signals the adrenal glands to produce more of the hormones adrenaline and cortisol and release them into the bloodstream?hypothalamus. ... 3. When the adrenal glands produce more of the hormones adrenaline what are two of the body’s reaction to these additional hormones:heart rate speeds up and sweat is produced. 4.the stress response the bodies natural way of dealing with anxiety. 5. the events that provoke stress are job issues or retirement. lack of time or money. grief. family problems. The article talks about building up your resilience to cope with stress. What does resilience mean? the capacity to recover quickly from difficulties. 6. What are two ways that you can control stress? be realistic and get a good night's sleep.

Answer:

The magnetic field is 1.16 T.  

Explanation:

speed, v = 10% of speed of light = 3 x 10^7 m/s

diameter, d = 54 cm

radius, r = 0.27 m

charge, q = 1.6 x 10^-19 C

mass, m = 1.67 x 10^-27 kg

Let the magnetic field is B.

The centripetal force is balanced by the magnetic force.  

\(qvB=\frac{mv^2}{r}\\\\B =\frac{mv}{qr}\\\\B =\frac{1.67\times 10^{-27}\times 3\times 10^{7}}{1.6\times 10^{-19}\times 0.27}\\\\B =1.16 T\)

Answer:

0.0129 m

Explanation:

ΔL = FL / (EA)

where ΔL is the deflection,

F is the force,

L is the initial length,

E is Young's modulus,

and A is the cross sectional area.

F = mg = 100 kg × 9.8 m/s² = 9800 N

A = 4.0 mm² × (1 m / 1000 mm)² = 4×10⁻⁶ m²

ΔL = (9800 N) (1.0 m) / ((1.9×10¹¹ Pa) (4×10⁻⁶ m²))

ΔL = 0.0129 m