Bohr’s atomic model differed from Rutherford's because it explained that electrons exist in specified energy levels surrounding the nucleus. electrons are embedded within the rest of the atom like plum pudding. an atom is an indivisible sphere. electrons circle the nucleus.

Answer:

34.5 m

Explanation:

According to the law of conservation of energy, the mechanical energy of the person at the top of the hill must be equal to the mechanical energy at the bottom. However:

- the mechanical energy at the top is just gravitational potential energy, since the person is at rest, so the kinetic energy is zero

- the mechanical energy at the bottom is just kinetic energy, since the height of the person has becomes zero

So, the initial gravitational potential energy of the person must be equal to the final kinetic energy of the person:

[tex]U=K[/tex]

[tex]mgh = \frac{1}{2}mv^2[/tex]

where

m = 64 kg is the mass of the person

g = 9.8 m/s^2 is the acceleration due to gravity

h is the initial height of the roller coaster

v = 26 m/s is the final speed

Solving for h,

[tex]h=\frac{v^2}{2g}=\frac{(26 m/s)^2}{2(9.8 m/s^2)}=34.5 m[/tex]

Answer:

education

clothes

food

shelter

Explanation:

Answer:

1. education

2. clothes

3. food

4. shelter

Explanation:

The correct answers are basic needs that children should be provided. However, spending money and vacations are just privileges, not mandatory.

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90.2 m/s. A rock dropped from rest after it has falling for 9.2 seconds will have a velocity of 90.2m/s.

The bodies left in free fall increase their speed (downwards) by 9.8 m/s² every second. The acceleration of gravity is the same for all objects and is independent of the masses of these. In the free fall the air resistance is not taken into account.

v = g*t

v = (9.8m/s²)(9.2s) = 90.2 m/s

Answer:The kinetic energy will decrease.

Explanation:As potential energy increases kinetic energy will increase, as kinetic or potential energy decreases, the kinetic or potential energy will decrease

Answer: Yes

Explanation:  To answer this, consider the natural processes that can cause a tree to fall, such as decay, disease, or adverse weather conditions. Trees can fall due to natural factors like rotting of the roots or trunk, strong winds, or heavy snow. Therefore, it is possible for a tree to fall down without any external force acting on it.

Answer:

The strength of the charge and the distance between the two bodies.

Explanation:

According to coulombs law, electrical force is calculated as follows:

F = k (Q1 ×Q2)/ d²

where Q1 and Q2  represents the amount of charge between the two bodies while d is the distance between then.

This means the electrical force is directly proportional to the electrical charge of the bodies and inversely proportional to the square of the distance between them.

Bodies with high amounts charges will have stronger electrical forces between them than bodies with less electrical charges.

Charged bodies near each other will have stronger electrical forces between them than bodies far apart.

Answer:

The force that required an object to move is greater than friction force. The opposite force for an object in motion is the friction force (assuming that the surface where the object lies is rough as most real objects are). This force is needed to be overcome to set the object to motion.

Explanation:

Answer:

B.It will be stiffer than the other. - I JUST DID THE QUIZ ON PLATO AND IT WAS CORRECT.

Explanation:

Answer:

Option B is the right answer.

Answer:

The correct answer is C. at the equilibrium position.

Explanation:

Answer:

Energy can change form, but the total amount of energy stays the same.

Explanation:

Energy transformation diagrams shows the different forms of energy which are converted into different forms.

As we know by an example of potential energy to kinetic energy conservation when a block is compressed against the spring then initially total energy is in the form of elastic potential energy of the spring.

When block is released then total potential energy of the block is converted into the kinetic energy of the block.

So here we know that in energy transfer diagram shows the transformation of energy while total energy will always remains conserved.

so here correct answer would be

Energy can change form, but the total amount of energy stays the same.

Answer:

a

Explanation:

Energy can change form, but the total amount of energy stays the same.

Answer:

The correct answer is actually D) They rotate quickly and are large and gaseous.

Think about the features of the outer planets.

I got this question wrong because of the previous user that answered this.

here is proof that my answer is correct:

Answer:

I think it would be exchanging sorry if it's wrong

Answer:

I think it's d. The coil gains an electical current

Explanation:

Answer:

Organ system

Explanation:

A group of organs that work together to perform a certain task

A group of organs that work together towards achieving one goal or completing one process is called an Organ system.

Explanation:

The organ system is the system which consists of the group of organ which has been assembled or grouped together to perform a particular course of action or simply say a task. There are many organ system in a human body.

For example, reproductive system, digestive system, excretory system. Here the reproductive system perform a particular task of reproduction, and so does the digestive system for the digestion and the excretory system for the excretion of waste.

Answer:

The speed of the headband, to the nearest whole number relative to a stationary observer watching Karen, is 11m/s

Explanation:

The velocity of the headband relative to the stationary observer is equal to the velocity of Karen relative to the stationary observer plus the velocity of the headband relative to Karen. Mathematically:

[tex]V_{H} =V_{K}+V_{H/K}[/tex]

Where:

[tex]V_{K}=9m/s [/tex]

[tex]V_{HK}=-20m/s [/tex] (it's negative because it mover backward)

[tex]V_{H} [/tex]: velocity of the headband relative to the stationary observer

Plugging these values

[tex]V_{H} =9m/s-20m/s=-11m/s[/tex]

Speed is simply the magnitude of velocity or its absolute value, that is to say, 11m/s (positive)

Answer:

To determine how efficient that system is.

Answer:

Because it gives a direct relation that can be used to obtain the efficiency E = Input/output which tell us how the system works, for example, if the efficiency is bigger than one, this means that the system amplifies the input (the output is bigger than the input) while if the efficiency is less than one, the output is smaller than the input.

Where these quantities can be forces, heat, electricity, or anything.

Answer:

true

Explanation:

you need to eliminate all unreal outcomes

Answer:

Two vectors not lying in the same line and pointing in different direction

C. Two-dimensional

Explanation:

One-Dimensional vectors will point in a single direction only. There magnitude will simply add up.

In case of opposite directions, both the vectors must be lying on a straight line. There magnitude will be subtracted from each other,

Two dimensional vectors are quantities with magnitude and direction and they are represented by two components, x and y.

So, vectors which are not in a straight line and point in different directions are called Two-dimensional vectors.

Answer:

42 degrees, virtual image, same size as the object (26 cm)

Explanation:

The law of reflection states that:

- When a ray of light is incident on a flat surface (such as the plane mirror), the angle of reflection is equal to the angle of incidence

So, since in this case the angle of incidence is 42 degrees, the angle of reflection is also 42 degrees.

Moreover, the image formed by a plane mirror is always:

- Virtual (on the same side as the object)

- The same size as the object

So in this case, since the object's size is 26 cm, the image's size is also 26 cm.

42 degrees

virtual

26 cm

Answer:

Inclined plane.

Explanation:

Geometrically, a screw is a narrow inclined plane that is wrapped around a cylinder. Like the other simple machines a screw can amplify force; a small rotational force (torque) on the shaft can exert a large axial force on a load.

A screw is a cylinder with a head (solid top) at one end and a pointed tip (like a nail) at the other end.

The mechanical advantage of the screw depends on the space between the threads and the length (and thickness) of the screw. The closer the threads are, the greater the mechanical advantage. It is easier to drive a screw into an object if the thread spacing is smaller.

Answer:

Inclined Plane

Explanation:

A screw incorporates which other simple machine?

lever

wheel and axle

inclined plane

pulley

To find the angle of impact in degrees below the horizontal, use the equations of motion to find the time of flight and horizontal distance the object covered when it rolled off the table, then apply those values to the equation for determining the angle of impact.

The subject at work here is Physics, more specifically the domain of kinematics. The angle of impact, in degrees below the horizontal, can be found using the equations of motion.

First, we'll need to find the projectile's time of flight using the equation: t = sqrt((2*y0)/g), where y0 = 0.65 m is the height of the table and g = 9.81 m/s² is acceleration due to gravity. This will give you the time.

Next, we can determine the horizontal distance covered by the object using the equation x = v0x * t, where v0x = 2.2 m/s is the initial horizontal velocity.

Finally, we can find the angle of impact using the equation θ = arctan((v*t)/x), where v is the initial vertical velocity (which should be zero as the object rolls off horizontally), t is the time of flight, and x is the horizontal distance. We finally convert the calculated angle from radians to degrees to get the answer.

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Answer:C

Explanation:

The specific heat capacity of the substance

In the equation Q=mcΔT, Q represents the specific heat of the substance being heated.

                                          Q = mcΔT

Where,

Q = capacity in Joules

m = mass in grams

c = specific heat of an object in J/g °C

ΔT = change in the temperature in °C

So, Option C is the answer.

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Answer:

= -20°C

Explanation:

The specific heat capacity of ice using the cgs system is 0.5cal/g°C

The enthalpy change is calculated as follows

ΔH=MC∅ where M represents mass C represents specific heat and ∅ represents the temperature change.

10cal = 2g×0.5cal/g°C×∅

∅=10cal/(2g×0.5cal/g°C)

∅=10°C

Final temperature= -30°C+ 10°C= -20°C

Answer:

-20 C

Explanation:

Answer:

B

Explanation:

The boat's velocity relative to the earth = the boat's velocity relative to the river + the river's velocity relative to the earth

v = 18 m/s + 2.5 m/s

v = 20.5 m/s

Answer: Trajectory=51m

Displacement=41m

Explanation:

Let's begin by stating clear that movement is the change of position of a body at a certain time. So, during this movement, the body will have a trajectory and a displacement, being both different:

The trajectory is the path followed by the body (is a scalar magnitude).  

The displacement is the distance in a straight line between the initial and final position (is a vector magnitude).  

According to this, in the description of the object placed at x= -7m on a number line and moving some 12m to the left and then to the right, stopping at x=34m; we are talking about the path followed by the object, hence its trajectory. So, 51 m is its trajectory.

But, if we talk about displacement, we have to draw a straight line between the initial position of the object (x=-7m) to its final position (x=+34m).

Now, being this an unidimensional problem, the displacement vector for this object is 41m.

Answer:

The digestive process:

Mouth

Esophagus

Stomach

Small intestine

Pancreas

Liver

Large intestine

Explanation:

The digestive system is made up of the GI tract or digestive tract—and the liver, pancreas, and gallbladder. The GI tract is a series of hollow organs joined in a long, twisting tube from the mouth to the anus. The hollow organs that make up the GI tract are the mouth, esophagus, stomach, small intestine, large intestine, and anus. The liver, pancreas, and gallbladder are the solid organs of the digestive system.

Final answer:

The correct order of the digestive organs as food passes from the mouth to the anus is mouth, esophagus, stomach, small intestine, large intestine, rectum, and anus. Accessory organs aid digestion but do not directly contact food.

Explanation:

The digestive system includes several major organs through which food travels from the mouth to the anus. To answer both review questions provided, here is the correct sequence of the digestive organs along the gastrointestinal tract, starting with the mouth:

In addition to these organs directly involved in the passage of food, there are accessory organs such as the salivary glands, pancreas, liver, and gallbladder that play crucial roles in digestion. These accessory organs assist in breaking down food through the secretion of enzymes and other digestive juices, but do not come into direct contact with the food within the GI tract.

Answer:

a. open.

Explanation:

Open System:

A system that has external interactions is called an open system. In natural sciences an open system is the one whose border is permeable to both energy and mass. In thermodynamics a closed system, by contrast, is permeable to energy but not to matter.

As there are external interactions, the open system might lose/gain energy as well as matter.

Answer:  

closed

Explanation:

Answer:

The answer is 9.8 N

Explanation:

As we know that the weight of an object is the amount of gravitational force acting on the object in an upward direction if the weight is acting is the downward direction.

The formula of weight:

W = Mass x Gravitational force

W = m x g

Given data:

Mass =1 kg

g = 9.8 ms-2

W = 1kg x 9.8 ms-2 = 9.8 kgms-2 ( 1 kgms-2 = N)

SO,  

W = 9.8 N

The toy has an earth weight of 9.8 N.

Final answer:

The Earth's position when the Sun reaches its lowest midday position in the sky is during the winter solstice. In the northern hemisphere, this occurs on December 21 or 22, and in the southern hemisphere, it occurs on June 20 or 21, both being the result of the tilt of Earth's axis.

Explanation:

The position of the Earth when the Sun rises to its lowest midday position in the sky in the northern hemisphere occurs during the winter solstice, which takes place on December 21st or 22nd. At this time, the Earth's axis of rotation is tilted away from the Sun, resulting in the Sun rising the most south of east, setting the most south of west, and taking its lowest and shortest path across the sky. This results in the shortest day and the longest night of the year for the northern hemisphere.

In contrast, for the southern hemisphere, the situation is reversed. The lowest midday position of the Sun occurs around June 20th or 21st, during their winter solstice. In this case, the Earth's axis is tilted such that the southern hemisphere is pointed away from the Sun, and thus the Sun takes a low arc across the sky, resulting in short days and long nights for that hemisphere.

Answer:

Thermal energy

Explanation:

A burner on a stove produces thermal energy

Answer:

Thermal energy

Explanation:

A burner on a stove produces thermal energy.

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