Which idea did Ptolemy’s model use to explain why the planets appeared to move backward as they moved in their orbits?

The planets spun in epicycles.
The planets rotated on their axes.
The planets revolved around the Sun.
The planets were made of different materials.

Answer:

The particle momentum, p

Explanation:

A particle's de Broglie's wavelength is an indication of the scale in length where the particle's wave-like properties are important. The symbol of de Broglie wavelength is λ or [tex]\lambda _{dB}[/tex] given as follows;

The de Broglie's wavelength formula is given as follows;

[tex]\lambda = \dfrac{h}{m \cdot v} = \dfrac{h}{p}[/tex]

Where;

λ = The wavelength of the particle in meters

v = The velocity of the particle in meters/seconds

m = The mass of the particle in kilograms

p = The momentum of the particle

h = Planck's constant = 6.626 × 10⁻³⁴ J/Hz

Therefore, the alternative value that we must have to successfully determine the wavelength if the mass and velocity are unknown, is the momentum, p of the particle.

Answer:

When water freezes to form ice, the molecules would be vibrating in place rather than moving round. It is a result of a decrease in the kinetic energy of the molecules of water. It is said that the temperature and the kinetic energy of the molecules is directly proportional which means that when temperature is increased, the kinetic energy of the molecules would increase as well making the molecules move around. However for this case, when we day the system is cooled then it means the temperature is decreased which would result to the decrease of the kinetic energy of the molecules.

Answer:

The bug will take 50 seconds to travel 55 m across the floor if it's traveling by 1.1 m / s​.

Explanation:

Given

Distance covered by bug = d = 55 m

The speed = s = 1.1 m/s

To determine

Time the bug will take to cover the distance = t = ?

Using the formula to determine the time the bug will take to travel 55 m across the floor if it's traveling by 1.1 m/s​.

Distance = Speed x Time

d = s x t

t = d/s

t = 55/1.1

t = 50 s

Therefore, the bug will take 50 seconds to travel 55 m across the floor if it's traveling by 1.1 m / s​.

Answer:

285.7s

Explanation:

Given parameters:

Speed of the person  = 1.4m/s

Unknown:

Time it takes to walk one time round the track = ?

Solution:

The circumference of the track is 400m for a standard pitch.

Now;

 Speed  = [tex]\frac{distance}{time}[/tex]

 Time  = [tex]\frac{distance }{speed }[/tex]  

 Now insert the parameters;

Time  = [tex]\frac{400}{1.4}[/tex]  = 285.7s

c. Developing new technologies designed to see farther into space

than before

The universe is everything including all of space, and all the matter and energy that space contains. Also it includes time itself and, of course, it includes us.

What began as a sequence one-upmanship in space-related technological advancements between the U.S. and the Soviet Union would spawn incredible progress observed in innovation to this day. The battle for dominance not only as a global superpower, but a space power, led the United States and the Soviet Union to race to put men in space and eventually on the moon.

The launch of the Soviet satellite Sputnik on Oct. 4, 1957, would place pressure on the U.S. to design technologies crafted for space exploration. This, in turn, spurred a series of innovations in technology that would have far reaching impacts beyond space.

These technologies can be seen as developments in modern healthcare, construction, and transportation. Relevant examples include medical imaging techniques,  artificial limbs, water filtration systems, solar panels, firefighting equipment, shock absorbers, air purifiers, home insulation, weather resistant airplanes, infrared thermometers, and countless other vital inventions.

While all these creations help sustain essential aspects of modern life, we carry one of the largest technological advancements from the space race in our pockets today.

Therefore, Developing new technologies designed to see farther into space than before lead scientists to develop new explanations about the universe.

Learn more about universe here:https://brainly.com/question/15844073

#SPJ1

Answer: V= u+ at

V= final velocity

u=initial velocity

a=acceleration

t=time taken

V= 20 + 2*3

V= 26m/s

Explanation:

Answer:

False. Astrology is not a science.

Explanation:

Astrology is a collective term for ideas about the supposed connection between the fate of people and events on Earth and the position of the celestial bodies. It mainly concerns the places in the sky of the sun, moon and planets, which were referred to as stars in ancient times, usually against the background of the fixed stars in the Zodiac. Although astrology cannot be confirmed despite research, and scientists have long rejected the principles of astrology as pseudoscience, many people continue to practice and / or believe in it.

Answer:

False

Explanation: i got it right in edge

Answer:

b

Explanation:

Bears hibernate in the winter

Answer:

hello

Explanation:

The magnitude of the electrostatic force of attraction or repulsion between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them

Explanation:

Catastrophism is a geological concept or ideology that was formerly in place. It suggests that the earth crust has evolved through only drastic and violent geological events.

Uniformitarianism suggests that the earth carefully evolved over a period of time and that the processes that are occurring today have occurred in times past.

Answer:

because liquid and solid states of water possesses intermolecular force of attraction which held the molecules of water in fixed

Explanation:

Unbalanced Force causes acceleration.

But why?

This is because for accelerating a body we need unbalanced forces to move it.

Hope it helps :)

Answer:

One-dimensional

Explanation:

Answer:

mars

Explanation:

just search it up

Answer:

Mars I belive

Explanation:

Answer:

2proof of hypothesis

Explanation:

A scientist is always on the look out for the proof of a hypothesis so as to validate their claim.

Answer:

In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

Explanation:

Answer:

The mini Cooper will experience the greater force

Explanation:

Generally, a bulldozer has a greater mass compared to a Mini Cooper hence when both of these vehicles interact in an head on collision the Mini Cooper will experience a greater force because the bulldozer has a greater momentum

Answer:

Workdone = 1435.2N/m

Explanation:

Given the following data;

Mass = 240kg

Acceleration = 1.3m/s²

Distance = 4.6m

To find the force;

Force = mass* acceleration

Substituting into the equation, we have;

Force = 240 * 1.3

Force = 312N

Now, to find the workdone;

Workdone = force * distance

Workdone = 312 * 4.6

Workdone = 1435.2N/m

Answer:

3. Large butterfly in flight, flying through the air?

Explanation:

Momentum is simply defined as the quantity of motion a body possess. It is mathematically given as;

 Momentum  = mass x velocity

The larger the mass, the larger the momentum and also the velocity

Since the large butterfly is in flight, it has the largest velocity.

A sleeping bear and resting caterpillar have no momentum because their velocity is 0

Answer:

2.5=10xm is the correct one

Explanation:

Answer:

-14

Explanation:

Answer: A

Explanation:

Location A represents the Caribbean region which is known for tourist attractions such as nice beaches. It is also known however, for devastating hurricanes.

Apart from mostly being islands, which puts them at risk of being in Hurricane paths, the Caribbean is warm and the air is moist. Hurricanes derive energy from these two things which is why Hurricanes attack the Caribbean rather frequently.

Answer:

Based off the picture the guy above showed me, the correct answer would be A

However, if you have a different map, choose the choice nearest to a body of water.

Answer:

874000J

Explanation:

Given parameters:

Mass  = 3.8Mg  = 3.8 x 10⁶g

  To kilograms;

          1000g  = 1kg

        3.8 x 10⁶g will be 3.8 x 10³kg

height  = 23m

Unknown :

Work done  = ?

Solution:

The work done by a body is give as;

    Work done  = mgh

m is the mass

g is the acceleration due to gravity

h is the height

 Now insert the parameters and solve;

             Work done  = 3.8 x 10³ x 10 x 23  = 874000J

Answer:75 ft east

Explanation:

Explanation:

a) Fixed points are the temperatures at which a thermometer is calibrated. They can refer either to the actual temperatures used for calibration, or the thermometer readings at those temperatures.

__

b) Fundamental interval is the difference between the fixed points. As with fixed points, it can refer either to the difference in actual temperature, or the difference in the corresponding thermometer readings.

Answer:

The Pendulum falls but the longer the period or the back and forth swing the greater amplitude the oscillation depends on the amplitude

Explanation:

Answer:

D, -8 F

Explanation:

This specific thermometer is in increments of two degrees per minor line and 10 per thicker line. Since the thermometer is showing below zero, the answer cannot be A or B since they are positive. -4 Cannot be the answer since the line addition does not make sense for that. It would be -4 if the thick line increments were 5 degrees instead of ten. Therefore if you count the lines by two from zero down to the thermometer line, you would get -8 Degrees F

Answer:

The average velocity is equal to the instantaneous velocity

Explanation:

The average velocity, [tex]\overline v[/tex], is given as follows;

[tex]\overline v = \dfrac{\Delta y}{\Delta t}[/tex]

Where;

Δy = The change in displacement

Δt = The change in time

The instantaneous velocity is the derivative found of the position of the object's displacement with respect to time

Therefore, the instantaneous velocity, [tex]v_{inst}[/tex] = The limit of the average velocity as the change in time becomes closer to zero

[tex]v_{inst} = \lim_{t \to 0} \left (\dfrac{\Delta y}{\Delta t} \right ) = \dfrac{dy}{dx}[/tex]

When the velocity is constant, the displacement time graph is a straight line graph, and the slope of the displacement-time graph which is the same as the velocity is constant  and therefore, we have;

[tex]Slope \ of \ straight \ line \ graph = \dfrac{y_2 - y_1}{t_2 - t_1} = \dfrac{\Delta y}{\Delta t}= \dfrac{dy}{dx}[/tex]

Therefore, for constant velocity, we have, [tex]\overline v[/tex] = [tex]v_{inst}[/tex] the average velocity is equal to the instantaneous velocity.