what is the change in energy δe of the hydrogen atom as the electron makes the transition from the n=3 energy level to the n=1 energy level? express your answer numerically in electron volts.

Answer: 17.3

Explanation:

The horizontal component of the velocity of the projectile is equal to 17.32 m/s.

A projectile is an object that is in flight after being projected. The acceleration acting is in the vertical direction which is due to gravity (g) in a projectile motion. Therefore, equations of motion can be applied separately on X-axis and Y-axis to find the parameters.

If any object is projected with the velocity v, making an angle θ (theta) from horizontal. Then the horizontal component of the initial velocity will be equal to v cosθ.

The vertical component of initial velocity is v sinθ. The horizontal component of velocity remains the same as no acceleration is acting horizontally during the entire motion of a projectile.

Given, the angle of the projectile with the ground, θ = 30°

The initial velocity of the projectile, v = 20 m/s

The horizontal component of this velocity, = v cosθ = 20 × cos30°

= 20 × 0.866

= 17.32 m/s

Therefore,  the horizontal component of this velocity is 17.32 m/s.

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D=44.13, Horizontal velocity is unimportant. The time it takes the cannon ball to fall to the ground is the key to determining the height of the cliff. where  that cannon is present.

The speed of any projectile travelling along a Horizontal velocity is known as the horizontal velocity. When a particle or object is launched into the air at an angle other than 90 degrees, it moves along the trajectory path and changes the shape of the curve to a parabolic one.

the speed at which velocity changes over time. Due to its magnitude and direction, acceleration is a vector quantity. The first derivative of velocity with respect to time or the second derivative of position with respect to time are further examples. This is called acceleration.

Distance to the ground is d = 1/2gt^2,

where g is the acceleration rate of gravity (9.80665 m/s^2)

and t = 3 secs.

d = .5×9.80665×9 = 44.13 m.

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Answer: D=44.13, Vertical velocity is not significant. The height of the cliff can be calculated using the time it takes the cannonball to hit the earth. where there is that gun.

Explanation: The horizontal velocity is the rate at which any projectile is moving along a plane. A particle or object that is propelled into the air at an angle other than 90 degrees goes along the trajectory line and transforms the curve's shape into a parabolic one.

the rate of change of velocity over time. Acceleration is a vector number because of its size and directional characteristics. Additional examples are the second derivative of location with respect to time or the first derivative of velocity with respect to time. Here is

Distance to the ground is d = 1/2gt^2,

where g is the acceleration rate of gravity (9.80665 m/s^2)

and t = 3 secs.

d = .5×9.80665×9 = 44.13 m

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planets

Explanation:

Answer:

stove

Explanation:

The stove is the independent variable in this question as it does not depend on anything like other variables such as pot, water, temperature and of cause pasta.

The pot depends on the stove, the water depends on the pot and stove, the pasta depends on the water and its temperature.

Cheers.  

The equation =c/f relates wavelength and frequency. There is an inverse relationship between wavelength and frequency.

One crucial equation connects them all: The speed of light is equal to the frequency times the wavelength of any electromagnetic wave. If we know the other measurement, we can use this connection to calculate the wavelength and frequency of the any electromagnetic wave.

The distance between the crests of two waves is known as the wavelength, which also applies to troughs. The number of vibrations that pass across a certain area in a second is the frequency, which is expressed in seconds per cycle (Hz) (Hertz). This article discusses how wavelength and frequency relate to one another.

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Answer:

The other person who answered this is correct :)

Explanation:

Magnets attract iron nails is the theory would the students most likely propose. Option A is correct.

The students' observations show that iron nails are attracted towards the North Pole (N) and the South Pole (S) of the bar magnet. This suggests that magnets have a property that attracts iron nails. The experiment was repeated by several students using different bar magnets, which further supports the theory that magnets attract iron nails.

The poles of a magnet attract all materials suggests that the poles of a magnet attract all materials, but the experiment only showed that iron nails are attracted to magnets. Iron nails are attracted towards all materials suggests that iron nails are attracted towards all materials, but the experiment only showed that iron nails are attracted to magnets. Iron nails have the same properties as magnets suggests that iron nails have the same properties as magnets, but this is not supported by the experiment. Option A is correct.

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Answer:

density

Explanation:

because it high salinity

Salinity and temperature of ocean water determines density of ocean water.

The density, of a substance, exists in its mass per unit volume. The symbol most often utilized for density is ρ, although the Latin letter D can also be utilized.

Increases in the temperatures of surrounding entities like ice and an increase in precipitation count fresh water into the ocean, which decreases the salinity. ocean water with lower salinity lives lighter in density and won't sink as much as denser water. This method also varies the ocean currents. The temperature has a greater influence on the density of ocean water than salinity does. So a layer of water which is having higher salinity can even float on top of the water with the one having lower salinity if the layer with more increased salinity exists quite a bit warmer than the lower salinity layer.

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The current flowing through the hair dryer is 10 Amperes (A).

To calculate the current flowing through the hair dryer, we can use Ohm's Law, which states that current (I) is equal to power (P) divided by voltage (V). Mathematically, it can be expressed as:

I = P / V

Given:

Power (P) = 1100 W

Voltage (V) = 110 V

Using the formula, we can calculate the current (I):

I = 1100 W / 110 V

I = 10 Amperes (A)

Ohm's Law is a fundamental principle in electrical engineering and physics that relates the current flowing through a conductor to the voltage across it and the resistance of the conductor. It is named after the German physicist Georg Simon Ohm, who formulated the law.

Mathematically, Ohm's Law can be expressed as:

V = I * R

Where:

- V represents the voltage across the conductor (measured in volts, V).

- I represents the current flowing through the conductor (measured in amperes, A).

- R represents the resistance of the conductor (measured in ohms, Ω).

According to Ohm's Law, the current flowing through a conductor is directly proportional to the voltage across it and inversely proportional to the resistance. In other words, if the voltage increases, the current will increase, assuming the resistance remains constant. Conversely, if the resistance increases, the current will decrease for a given voltage.

Ohm's Law is commonly used in analyzing and designing electrical circuits, as it provides a simple relationship between voltage, current, and resistance. It serves as the foundation for understanding various electrical phenomena and is widely applied in fields such as electronics, power systems, and telecommunications.

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Explanation:

a) i) Calculation of the friction force:

The friction force can be determined using the equation:

friction force = coefficient of friction * normal force

The normal force is equal to the weight of the object, which can be calculated as:

normal force = mass * gravitational acceleration

where the gravitational acceleration is approximately 9.8 m/s².

normal force = 75 kg * 9.8 m/s² = 735 N

friction force = 0.4 * 735 N = 294 N

ii) Calculation of the acceleration of the body:

Now, we can calculate the acceleration using Newton's second law:

net force = mass * acceleration

Since the applied force and the friction force act in opposite directions, the net force can be calculated as:

net force = applied force - friction force

net force = 300 N - 294 N = 6 N

mass = 75 kg

6 N = 75 kg * acceleration

acceleration = 6 N / 75 kg = 0.08 m/s²

b) Explanation:

In part (a), we calculated the friction force to be 294 N and the acceleration of the body to be 0.08 m/s². The positive acceleration indicates that the body is moving in the direction of the applied force.

The friction force opposes the motion of the body and acts in the opposite direction to the applied force. In this case, the applied force of 300 N is greater than the friction force of 294 N. As a result, the net force acting on the body is 6 N in the direction of the applied force.

The small net force of 6 N, compared to the body's mass of 75 kg, results in a relatively low acceleration of 0.08 m/s². This indicates that the body will accelerate slowly in the direction of the applied force due to the presence of friction.

Overall, the friction force and the resulting acceleration of the body are determined by the coefficient of friction (μ) and the mass of the object. In this case, the body experiences a relatively high friction force, leading to a small acceleration.

Your average velocity for the journey has been 94.57 km/h.

The average velocity of an object is the ratio of total displacement to the total time of motion of an object.

V = ( total displacement ) / ( total time )

The total displacement of your journey is calculated as;

x = 485 km - 154 km

x = 331 km

The total time of the motion is calculated as;

t = 4:30 - 1:00 = 3:30 = 3.5 hours

v = x / t

v = ( 331 km ) / ( 3.5 hr )

v = 94.57 km/h

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Answer:

1) A.

Check your pulse at the wrist or neck.

2) A.

Strong emotions can impact the heart rate.

3) A.

Being fit is dependent on many different factors.

4) Yes, it is a very useful anaerobic exercise.

Explanation:

The weight of the staging is 1000 N.

To find out the weight of the staging when the person in the middle weights 400N and the tensions in each rope are 300 N, we need to use the concept of equilibrium of forces.

According to Newton’s Third Law of Motion, every force has an equal and opposite reaction force acting upon it. In other words, when an object exerts a force on a second object, the second object exerts a force on the first object that is equal in magnitude and opposite in direction. That means, when three forces are acting on a body at rest in equilibrium, the sum of all the forces in the vertical direction must be equal to zero. So, the weight of the staging will be equal to the combined tension of both the ropes acting on the staging. If we consider the downward direction as negative and upward direction as positive, the sum of all forces acting in the vertical direction is zero.
The tension in the rope is acting upwards, and the weight of the person is acting downwards. So, the net force in the vertical direction is:
Weight of the person - Tension in the rope = 0
Weight of the person = Tension in the rope
Weight of the person = 300 N
As the weight of the person is 400 N and the tension in each rope is 300 N,

the weight of the staging can be calculated as follows:
Weight of the staging = 2 × Tension in the rope + Weight of the person
Weight of the staging = 2 × 300 N + 400 N
Weight of the staging = 1000 N
Therefore, the weight of the staging is 1000 N.

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The same distance, L, assuming all other factors (such as the coefficient of friction and the force acting on the block) remain constant.

Distance is the total length covered by an object during its motion. It is a scalar quantity and is measured in units of meters (m) or other units of length.

Friction is the force that opposes the relative motion between two surfaces in contact. It is caused by the interaction of microscopic irregularities in the surfaces and can act in the direction of motion or opposite to it.

According to the given information:

Assuming that the block's initial velocity and the rough region are the same in both scenarios, the distance traveled by the block with a mass of 2M would also be L. This is because the force of friction acting on the block would be proportional to its weight (mass times gravity), so doubling the mass of the block would double the force of friction acting on it. This increased force would counteract the increased inertia of the block and result in the same amount of distance traveled before coming to a stop.

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If you start with 1,000 grams of erbium-165, the time it  will take to have 125 grams of erbium-165 left in the sample is 20.8 hours.

option D is the correct answer.

Half life is the time that it takes for half of the original value of some amount of a radioactive element to decay.

If you start with 1,000 grams of erbium-165, the time it  will take to have 125 grams of erbium-165 left in the sample is calculated as follows;

1,000 ---------- 0 time

500 ----------- 10.4 hours

125 ------------- 20.8 hours

Thus, from the calculation done above, we can see that If you start with 1,000 grams of erbium-165, the time it  will take to have 125 grams of erbium-165 left in the sample is 20.8 hours.

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They will each have equal but opposite velocity.

Momentum is how we measure mass that is in motion. Any moving object will have momentum. Under the law of physics, the object’s momentum equals mass times velocity. These two skaters have just pushed off against one another. One skater has twice the mass as the other. We know that skater 1 has a smaller mass and skater 2 has a larger mass than skater 1. It implies that the force of skater 2 will be greater than that of skater 1 since force (F) varies directly proportional to the mass of an object together with its acceleration. So, when these two skaters collide, skater 2 exerts a greater force than skater 1 and the velocity of skater 1 will be increased and greater as a result of the collision with skater 2.

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Answer:

The value of \(a\cdot b\times c\) is 0.

Explanation:

The three vectors provided are:

\(a=2i-3j+7k\\b= i+2k\\c=j-k\)

The value to be computed is:

\(a\cdot b\times c\)

Compute the value of (b × c) as follows:

\(b\times c=\left|\begin{array}{ccc}i&j&k\\1&0&2\\0&1&-1\end{array}\right|\)

       \(=\left|\begin{array}{cc}0&2\\1&-1\end{array}\right|i-\left|\begin{array}{cc}1&2\\0&-1\end{array}\right|j+\left|\begin{array}{cc}1&0\\0&1\end{array}\right|k\\\\=-2i+1j+1k\)

Now compute the value of \(a\cdot b\times c\) as follows:

\(a\cdot b\times c=(2i-3j+7k)\cdot (-2i+j+k)\)

           \(=(2\cdot -2)+(-3\cdot 1)+(7\cdot1)\\\\=-4-3+7\\\\=0\)

Thus, the value of \(a\cdot b\times c\) is 0.

The name of the substance is silver based on the specific heat capacity value.

The specific heat capacity of the substance is calculated by applying the following formula for heat capacity.

Q = mcΔθ

where;

c = Q / mΔθ

The specific heat capacity of the substance is calculated as;

c = (5875 J ) / ( 500 g x 50 )

c = 0.235 J/kgK

The substance that has the same specific heat capacity calculated above is silver.

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The three essential diagnostic features of anorexia nervosa, as defined by the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), are:

It is important to note that these diagnostic features must be present and significantly impair the individual's functioning in order to meet the criteria for anorexia nervosa. Additionally, there may be other associated features and behaviors,

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Your question is incomplete. Please find below the complete question.

B. Its acceleration is 9.8 m/s^2 down.

Acceleration, is the rate at which speed adjustments with time, in phrases of pace and path. A point or an item moving in a line is expanded if it hurries up or slows down.

We always have a vertical (downward ) acceleration of 9,8 m/s^2. The horizontal acceleration is zero in case you overlook friction forces. The vertical issue of speed is zero on the top of the trajectory whilst the horizontal component isn't like zero in any other case the apple will no longer arrive at your buddy.

You toss an apple across the room to a friend. Which of the following statements is true about the apple at the top of its trajectory?

A. Its acceleration is zero.

B. Its acceleration is 9.8 m/s2 down.

C. The horizontal component of its velocity is zero.

D. The vertical component of its velocity is 9.8 m/s down.

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Answer:

no i did not observe anything

Explanation:

Answer:

Chemical change.

Explanation:

The saliva or salivary amylase is a bio-catalyst...it causes chemical change during the dissolving process. Also, once the food is dissolved it can't be brought back to it's original state.

An ideal fluid is one that has zero viscosity. The flow of an ideal fluid over a flat plate can be regarded as a(n) laminar flow

In fluid dynamics, the term "laminar flow" refers to a smooth and orderly flow pattern of a fluid, characterized by parallel layers moving in the same direction.

In the case of an ideal fluid flowing over a flat plate, the lack of viscosity allows the fluid to flow without any internal friction or resistance. As a result, the fluid moves in a uniform and predictable manner, with adjacent layers of the fluid sliding past each other smoothly.

This laminar flow is in contrast to turbulent flow, where the fluid exhibits chaotic and irregular motion with eddies and swirls. In the context of an ideal fluid, the absence of viscosity ensures that the flow remains laminar and predictable.

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Answer: Weak nuclear forces are involved when certain types of atoms break down. Strong nuclear forces are responsible for holding atoms' nucleus together.

Push the ball out away from her on the first step. Option B.

The key to consistent shots is the angle at which you pocket the ball. For right-handed bowlers, the pocket is between the 1st and 3rd pins. If you are left-handed it will be between pins 1 and 2. Keep your arms straight as you bring them back for the backswing and try to stay close to your body throughout the throw. Timing is important when releasing the ball.

A simple way to determine where the ball should exit the edge of the oil sample is simply to apply the rule of 31. Subtract 31 from the oil pattern distance. This will give you the board number where the ball ends the pattern. As a rule of thumb, right-handed bowlers place the inside of their left foot on the midpoint, and left-handed bowlers do the same with their right foot. Then stand with your other leg slightly behind you about 2 inches apart.

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Answer:

Maria can improve her arm swing motion in bowling by developing a free swing, where instead of controlling the ball with her arm, the ball controls her arm. This can be achieved by putting only mild to light grip pressure on the ball and pushing it back while standing relaxed. This will let the ball down and the gravitational energy will get her arm to the apex. As soon as she reaches the apex, she’ll have to slide forward and release the ball without pulling and grabbing.

Out of the options you provided, pushing the ball out away from her on the first step seems to be a good way for Maria to improve her arm swing motion in bowling.

So your answer would be (A) pushing the ball out away from her on the first step.

Answer:

A molecule is an electrically neutral group of two or more atoms held together by chemical bonds. Molecules are distinguished from ions by their lack of electrical charge.

Explanation:

Unpeeled hard-boiled eggs can last unrefrigerated for about 2 hours. After that, they should be refrigerated to ensure food safety.

Unpeeled hard-boiled eggs can be stored unrefrigerated for about two hours at room temperature. After that, it is recommended to refrigerate them to maintain their quality and safety. Refrigeration helps to slow down bacterial growth and extends the shelf life of hard-boiled eggs. If you plan to keep them for longer periods, it is advisable to refrigerate them in a covered container to prevent any contamination. Always use your discretion and inspect the eggs for any signs of spoilage before consuming them.

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