(13%) Problem 7: Consider the Lyman series for atomic transitions in hydrogen: 50% Part Calculate the wavelength the first line in the Lyman series, in nanometers 50% Part (b) What type of electromagnetic radiation is it?

Answer:

Large scale

Explanation:

short term

Answer: all of the above

Explanation: Give brainliest please (first)

Skateboarder on a ramp is accelerated by a nonzero net force. The statements are, Part A: Sometimes true. Part B: Never true. Part C: Always true. Part D: Never true.

The direction of the skateboarder's movement depends on the initial conditions and the direction of the net force. If the skateboarder is already moving in a certain direction, the net force may change the direction of the skateboarder's motion, but the skateboarder may still be moving in a direction other than the direction of the net force.

The acceleration can only be at right angles to the net force if there are other forces acting on the skateboarder, which would change the direction of the net force. If the skateboarder is instantaneously at rest, then there is no net force acting on the skateboarder (since the skateboarder is not accelerating), which contradicts the statement that there is a nonzero net force.

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--The complete question is, Skateboarder on a ramp is accelerated by a nonzero net force. For each of the following statements, state whether it is always true, never true, or sometimes true.

Part A The skateboarder is moving in the direction of the net force. The skateboarder is moving in the direction of the net force.

Part B The acceleration of the skateboarder is at right angles to the net force. The acceleration of the skateboarder is at right angles to the net force.

Part C The acceleration of the skateboarder is in the same direction as the net force. The acceleration of the skateboarder is in the same direction as the net force.

Part D The skateboarder is instantaneously at rest. The skateboarder is instantaneously at rest.--

Answer:

The work done by the helicopter is equal to the force applied multiplied by the distance moved in the direction of the force. In this case, the force is equal to the weight of the two people, which is given as 150 kg, and the distance moved in the direction of the force is 20 meters.

Therefore, the work done by the helicopter is:

Work = Force x Distance = 150 kg x 9.8 m/s^2 x 20 m = 29,400 J

This work is turned into potential energy, which is stored in the two people lifted by the helicopter. As the helicopter pulls the people upward, their potential energy increases due to their increased height above the ground. If the helicopter were to release the people, their potential energy would be converted into kinetic energy as they fell back down to the ground.

Explanation:

Answer:

6926.4J

Explanation:

Given parameters:

Mass of iron  = 200g

Initial temperature  = 100°C

Final temperature  = 22°C

Unknown:

Amount of heat transferred to the water  = ?

Solution:

The quantity of heat transferred to the water is a function of mass and temperature of the iron;

 H  = m c Ф

m is the mass of the iron

Ф is the change in temperature

C is the specific heat capacity of iron = 0.444 J/g°C

Now;

 insert the parameters and solve;

      H  = 200 x 0.444 x (100-22)

      H = 6926.4J

Answer:

The answer is B - the bending of rock layers happens due to stress, and this process is called folding. Faults are when it looks broken/displaced

The angle, in radians, between the central maximum and the m = 1 bright fringe is approximately 0.114 radians.

When light passes through two narrow slits, it creates an interference pattern on a screen. The pattern consists of a series of bright and dark fringes.

The central maximum corresponds to the brightest part of the pattern, and the bright fringes on either side of the central maximum are labeled as m = 1, m = 2, and so on.

In this case, the slits are spaced 10 wavelengths apart.

We can use the concept of the double-slit interference to find the angle between the central maximum and the m = 1 bright fringe.

The formula for the angle θ between the central maximum and the mth bright fringe in a double-slit interference pattern is given by:

sin(θ) = m * λ / d

where λ is the wavelength of light and d is the distance between the slits.

We are interested in the angle between the central maximum (m = 0) and the m = 1 bright fringe. Plugging in the values into the formula, we have:

sin(θ) = (1 * λ) / (10 * λ)

sin(θ) = 1 / 10

θ = arcsin(1 / 10)

Using a calculator, we find that the arcsin(1 / 10) is approximately 0.114 radians.

Therefore, the angle, in radians, between the central maximum and the m = 1 bright fringe is approximately 0.114 radians.

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Answer:

In the given graph,

Velocity is constant between 4 to 8 which is 2m/s

So, at t=5s

Instantaneous velocity=2m/s

Explanation:

hope this help u thank u

A. The Mach number at which wave drag is minimum can be calculated using the formula:

M_min = sqrt(1 + (gamma-1)/(2*Cd0*AR*e*gamma))

where gamma is the specific heat ratio, Cd0 is the zero-lift drag coefficient, AR is the aspect ratio of the wing, and e is the Oswald efficiency factor.

B. It makes physical sense for wave drag to have a minimum value at some supersonic value of Mach number above 1 because at subsonic speeds, wave drag is caused by the formation of shock waves at the leading and trailing edges of the wing, which increase drag.

However, at supersonic speeds, the shock waves move away from the aircraft, reducing drag.

Therefore, there is a Mach number at which the reduction in wave drag due to the movement of the shock waves away from the aircraft outweighs the increase in drag due to the increase in pressure drag and skin friction drag, resulting in a minimum value of wave drag.

This suggests that the linear supersonic theory is valid for certain Mach number ranges, where the assumptions made in the theory are valid. However, as the Mach number increases.

The assumptions of the linear theory become less valid, and the actual behavior of the flow may deviate significantly from the predictions of the theory.

Therefore, for higher Mach numbers, other methods such as computational fluid dynamics (CFD) must be used to accurately predict the behavior of the flow.

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The useful energy the machine will generate in 15minutes is 81000J

The efficiency of a machine indicates how well its input energy is converted to useful output energy or work. It is a major factor in the usefulness of a machine and is the fraction or percentage of the output divided by the input.

Therefore the efficiency of a machine is given as Energy output/ energy input ×100 or power output/ power input ×100

let the power output be x

therefore 18=( x/500)×100

100x = 18×500

x= 18×500/100= 90J/s

Energy = power ×time

in 15minutes = 15×60s, the machine will generate energy of 90×15×60= 81000J

Therefore the machine will generate a useful energy of 81000J

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The gravitational force between an astronaut of mass 150 kg and the ISS at a distance of 20 m from its center of mass is approximately 9.254 × 10⁻⁸ N. However, other factors like air resistance and velocity could affect the actual force experienced by the astronaut.

To answer your question about the force on a 150-kg astronaut near the International Space Station (ISS), we'll need to use the formula for gravitational force:

F = G * (m1 * m2) / r²

where F is the force, G is the gravitational constant (6.674 × 10⁻¹¹ N m²/kg²), m1 is the mass of the ISS (approximately 370,000 kg), m2 is the mass of the astronaut (150 kg), and r is the distance from the center of mass (20 m).

(a) Plugging in the given values, we get:

F = (6.674 × 10⁻¹¹ N m²/kg²) * (370,000 kg * 150 kg) / (20 m)²

F ≈ 9.254 × 10⁻⁸ N¹
So, the force on the 150-kg astronaut when she is 20 m from the center of mass of the International Space Station is approximately 9.254 × 10⁻⁸ N.

(b) The accuracy of this answer depends on the accuracy of the given values and the assumptions made (e.g., considering the ISS and the astronaut as point masses). However, this calculation gives a reasonable estimate of the gravitational force between the ISS and the astronaut. Keep in mind that other factors, such as air resistance and the astronaut's velocity, could influence the actual force experienced by the astronaut.

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The best description of radiation is transfer of thermal energy through infrared waves (option B).

Radiation is energy that comes from a source and travels through space at the speed of light.

This energy has an electric field and a magnetic field associated with it, and has wave-like properties. You could also call radiation “electromagnetic waves”.

Radiation is the process of radiating waves or particles. Radiation is energy that moves from one place to another in a form that can be described as waves or particles.

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Answer:

Is Mercury an answer on your thing?

Explanation:

Mercury has the least amount of gravity, so therefore you can jump the highest on Mercury.

Answer:

Jupiter

Explanation:

Jupiter has more than 300 time the mass as earth. so, it's gravitational pull is stronger.

Hopefully this helps

The density of water expressed in SI unit is 1000.3 kg/m³

Density is defined as the ratio of mass per unit volume.

where M is the mass of the object and V is the volume occupied by the object

As we know that 1 slug = 14.593 kg

So 1.94 slug = 1.94 × 14.593 kg

Also 1 ft³ = 0.0283 m³

On converting slug/ft³ to kg/m³

= (1.94 slug/ ft³) * (14.593/1 slug) * (1/0.0283 )

= 1000.3 kg/m³

Therefore the density in SI unit is 1000.3 kg/m³.

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The plane travels a distance of 325 miles if the airplane travels for 2.5 hours at an average speed of 130 miles per hour. Using the distance formula (d = rt), we can calculate the distance.

To find the distance traveled by the airplane, we can use the distance formula, which is represented as d = rt. In this formula, "d" represents the distance, "r" represents the rate or speed at which the object is traveling, and "t" represents the time taken for the travel.

Given that the airplane travels for 2.5 hours at an average rate of 130 miles per hour, we can substitute these values into the formula. The rate of the airplane is 130 miles per hour, and the time taken is 2.5 hours.

Using the formula, we can calculate the distance traveled as follows:

d = rt

d = 130 mph × 2.5 hours

Multiplying the rate (130 mph) by the time (2.5 hours) gives us:

d = 325 miles

Therefore, the airplane travels a distance of 325 miles during the 2.5 hours of travel at an average rate of 130 miles per hour.

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The 3rd force is (-11 I + 9 j + 64 k) Newton, according to the information given in the question.

A pull or push from which an object experiences as a result of interacting with another item is known as a force. whenever two items engage with one another. Force is used to describe a body's tendency to change or alter its state as a result of an external cause. When force is applied, the object can also alter its size, shape, and direction. kicking a ball, pushing and pulling on the door, or kneading dough are a few examples.

Because the weight is in equilibrium, hence sum of total forces must be equal to 160 N.

Therefore,

F1 + F2 + F3 = 160

(-2î-24ĵ+11k) + (13î+15j+85k) + F3 = 160 k

(Since force of gravity is along the z-axis)

11 i - 9 j + 96 k + F3 = 160 k

F3 = (-11 i + 9 j + 64 k) N.

Components of third force are -

11 Newton along X-axis

9 Newton along Y-axis

64 Newton along Z-axis

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The pressure is 22.59 x 10⁵ Pa.

We need to know about pressure to solve this problem. Pressure is unit that describe how much force applied on a surface area. It can be determined as

P = F / A

where P is pressure, F is force and A is area.

From the question above, we know that

d = 0.39 cm = 0.0039 m

F = 27 N

Calculate the surface area of the nail

A = π . r²

A = π . (1/2 . d)²

A = π . (1/2 . 0.0039)²

A = 1.195 x 10¯⁵ m²

Determine the pressure

P = F / A

P = 27 / (1.195 x 10¯⁵ )

P = 22.59 x 10⁵ Pa

Hence, the pressure is 22.59 x 10⁵ Pa.

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Answer:

Explanation:

5. Fill in the blanks with either "More," "Less," or "The Same."

a) If an object has more mass than another object, it will accelerate_less____

b) In order to accelerate an object more, one would need to apply_more____ force.

c) If an equal force is applied to two different objects, the less massive object will accelerate_more___

The answer is less, more and more.

If an object has more mass than another object, it will accelerate less. In order to accelerate an object more, one would need to apply more force. If an equal force is applied to two different objects, the less mass of an object will accelerate more

The acceleration of an object depends directly on the force acting upon the object, and inversely on the mass of the object.

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Answer:

Acceleration = 4.22m/s², North.

Explanation:

In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.

Hence, if we subtract the initial velocity from the final velocity and divide that by the time, we can calculate an object’s acceleration.

Mathematically, acceleration is given by the equation;

\(Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}\)

\(a = \frac{v - u}{t}\)

Where,

a is acceleration measured in \(ms^{-2}\)

v and u is final and initial velocity respectively, measured in \(ms^{-1}\)

t is time measured in seconds.

Given the following data;

Time, t = 18.5secs

Final velocity = 78m/s

Initial velocity = 0

Substituting into the equation;

\(a = \frac{78 - 0}{18.5}\)

\(a = \frac{78}{18.5}\)

Acceleration, a = 4.22m/s²

Therefore, the average acceleration of the airplane during the landing is 4.22m/s² due North.

The line of evidence that is not consistent with the theory of evolution of the horse is: "The fossils of the limbs are different from each other, which indicates these organisms are not related and evolved separately from each other."

The theory of evolution suggests that organisms share a common ancestor and have evolved through gradual changes over time. Therefore, the presence of similar structures and traits among fossilized limbs is consistent with the theory, indicating that these organisms are related and evolved from a common ancestor. If the fossils of the limbs were significantly different from each other, it would suggest that these organisms evolved separately and do not share a common ancestry. However, this would contradict the theory of evolution, which states that species are connected through common ancestors and have undergone a process of gradual change.

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Answer:

c

Explanation:

Answer:

C.

Explanation:

When there is heat the water turns into vapour if not covered but will turn back to water if covered (condensation)

energy increases by factor of 25

since the energy of a longitudinal wave is directly proportional to the amplitude of the wave by a factor of a square( if amplitude is multiplied by 3 then the energy is multiplied by 3 squared which is 9 times)

An athlete stretches a spring an extra 40.0 cm beyond its initial length. The amount of energy transferred to the spring is b) 4230 J, if the spring constant is 52.9 N/cm

We can calculate using the below formula,

E= 1/2 kΔx²

where E is the energy transferred, k is the spring constant, and Δx is the displacement from the equilibrium position.

The equation for energy stored in the spring is given as follows:

E = 1/2 k x²

where E is the energy, x is the displacement from the equilibrium position, and k is the spring constant of the spring.

The amount of energy transferred to the spring is determined using the formula for the energy stored in the spring.

E = 1/2 k Δx²

Where E is the energy, Δx is the displacement from the equilibrium position, and k is the spring constant of the spring.

Given that the displacement, Δx = 40.0 cm and the spring constant, k = 52.9 N/cm.

We will substitute these values into the equation for energy transferred:

E = 1/2 k Δx²= 1/2 (52.9 N/cm) (40.0 cm)²= 1/2 (52.9 N/cm) (1600 cm²)= 4230 J

Therefore, the amount of energy transferred to the spring is b) 4230 J

The Question was Incomplete, Find the full content below :

An athlete stretches a spring an extra 40.0 cm beyond its initial length. How much energy has he transferred to the spring, if the spring constant is 52.9 N/cm?

a) 4230 kJ

b) 4230 J

c) 423 kJ

d) 423 J

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The painter can walk up to 0.69 m from the right bar before the plank starts to fall.  It is important to note that this assumes that painter and bucket remain stationary.

The weight of the bucket creates a clockwise torque around  left bar, while the weight of painter creates a counterclockwise torque around the right bar. For plank to remain in equilibrium, these torques must balance each other out.

We can use the principle of moments to calculate the distance d from the right bar that the painter can walk before the plank starts to fall. The formula for the principle of moments is:

Torque around left bar = Torque around right bar

\(51 kg * 9.8 m/s^2 * (29 m - d) = 75 kg * 9.8 m/s^2 * d\)

Solving for d gives:

d = 0.69 m

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Answer:

1/2 m*(2(h)/t)*g

Explanation:

Kinetic energy refers to the form of energy that's used by an object due to its motion.

You didn't give more information about the values, therefore, the kinetic energy will be explained. It should be noted that when work, which helps in the transfer of energy is done on an object, the object will speed up and thereby gain kinetic energy.

Kinetic energy simply refers to the property of a moving object or a particle. It depends on both motion and mass. The formula for the calculation of kinetic energy is given as:= 1/2mv²

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Answer:

gravitational force electric force and magnetic force

Answer:

350Joules

Explanation:

According to law of Conservation of energy, the amount of energy at the used up at the start is equal to that at the end.

The initial energy used up is gravitational potential energy

Final energy at the lowest point is kinetic energy.

If the energy is conserved then it means energy is not used up during the process hence;

Initial Potential energy = Final kinetic energy

If the gravitational potential energy is 350Joules then her final kinetic energy at the lowest point will also be 350Joules